CN116803088A

CN116803088A - Digital broadcast receiving apparatus

Info

Publication number: CN116803088A
Application number: CN202280013628.8A
Authority: CN
Inventors: 益冈信夫; 清水拓也; 桥本康宣; 吉泽和彦; 秋山仁
Original assignee: Maxell Ltd
Current assignee: Maxell Ltd
Priority date: 2021-02-04
Filing date: 2022-01-06
Publication date: 2023-09-22
Also published as: JP2022170040A

Abstract

The present invention provides a technique for better transmitting or receiving an advanced digital broadcasting service. The 1 or more receiving units perform frequency scanning on the received broadcast wave to detect a 2K broadcast service transmitting the 2K broadcast program, generate a service list of the 2K broadcast service using information on the detected 2K broadcast service, detect a 4K broadcast service transmitting the 4K broadcast program after the detection of the 2K broadcast service, generate a service list of the 4K broadcast service using information on the detected 4K broadcast service, and the memory stores the service list after combining the generated service list of the 2K broadcast service and the service list of the 4K broadcast service.

Description

Digital broadcast receiving apparatus

Technical Field

The present invention relates to a digital broadcast receiving apparatus.

Background

Instead of the existing analog broadcasting service, a digital broadcasting service has been started in various countries from the second half of the 1990 s. The digital broadcasting service realizes improvement of broadcasting quality using an error correction technique, multi-channel and HD (High Definition) using a compression encoding technique, multimedia of services using BML (Broadcast Markup Language: a markup language of broadcasting) and HTML5 (Hyper Text Markup Langueag version: a fifth edition of a hypertext markup language), and the like.

In recent years, advanced digital broadcasting systems have been studied in various countries for the purpose of further improvement of frequency use efficiency, higher resolution, and advanced function evolution.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication 2016-14420

Disclosure of Invention

Problems to be solved by the invention

The current digital broadcasting has been in widespread use for more than 10 years since the start of service, and a broadcast receiving apparatus capable of receiving the current digital broadcasting service has been in widespread use. Therefore, in starting an advanced digital broadcasting service currently under study, compatibility with an existing digital broadcasting service needs to be considered. That is, it is preferable to realize UHD (Ultra High Definition: ultra high resolution) of video signals while maintaining the current audio-visual environment of digital broadcasting services.

As a technique for implementing UHD broadcasting in a digital broadcasting service, there is a system described in patent document 1. However, the system described in patent document 1 is a system that replaces existing digital broadcasting, and does not consider an audiovisual environment in which existing digital broadcasting services are maintained.

The present invention is directed to providing a technology of an advanced digital broadcasting service having a better transmission or reception function in consideration of compatibility with existing digital broadcasting services.

Means for solving the problems

As means for solving the above problems, the techniques described in the scope of the claims are used.

As an example, the following may be used: the 1 or more receiving units perform frequency scanning on the received broadcast wave to detect a 2K broadcast service transmitting the 2K broadcast program, generate a service list of the 2K broadcast service using information on the detected 2K broadcast service, detect a 4K broadcast service transmitting the 4K broadcast program after the detection of the 2K broadcast service, generate a service list of the 4K broadcast service using information on the detected 4K broadcast service, and the memory stores the service list after combining the generated service list of the 2K broadcast service and the service list of the 4K broadcast service.

Effects of the invention

According to the present invention, a technique of better transmitting or receiving an advanced digital broadcasting service can be provided.

Drawings

Fig. 1 is a system configuration diagram of a broadcasting system according to an embodiment of the present invention.

Fig. 2A is a block diagram of a broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 2B is a detailed block diagram of a first modem unit of the broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 2C is a detailed block diagram of a second modem unit of the broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 2D is a detailed block diagram of a third modem unit of the broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 2E is a detailed block diagram of a fourth modem unit of the broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 2F is a detailed block diagram of a first decoder section of the broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 2G is a detailed block diagram of a second decoder section of the broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 2H is a software configuration diagram of a broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 3A is a block diagram of a broadcast station server according to an embodiment of the present invention.

Fig. 3B is a block diagram of a service operator server according to one embodiment of the present invention.

Fig. 3C is a block diagram of a portable information terminal according to an embodiment of the present invention.

Fig. 3D is a software configuration diagram of the portable information terminal according to an embodiment of the present invention.

Fig. 4A is a diagram illustrating a segment structure of a digital broadcast according to an embodiment of the present invention.

Fig. 4B is a diagram illustrating layering in layered transmission of digital broadcasting according to an embodiment of the present invention.

Fig. 4C is a diagram illustrating a process of generating an OFDM transmission wave of a digital broadcast according to an embodiment of the present invention.

Fig. 4D is a diagram illustrating a basic structure of a channel coding section of digital broadcasting according to an embodiment of the present invention.

Fig. 4E is a diagram illustrating segment parameters of an OFDM scheme of digital broadcasting according to an embodiment of the present invention.

Fig. 4F is a diagram illustrating transmission signal parameters of a digital broadcast according to an embodiment of the present invention.

Fig. 4G is a diagram illustrating a configuration of pilot signals of a synchronization modulation segment of a digital broadcast according to an embodiment of the present invention.

Fig. 4H is a diagram illustrating a configuration of pilot signals of a differential modulation section of digital broadcasting according to an embodiment of the present invention.

Fig. 5A is a diagram illustrating bit allocation of a TMCC carrier of a digital broadcast according to an embodiment of the present invention.

Fig. 5B is a diagram illustrating bit allocation of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 5C is a diagram illustrating transmission parameter information of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 5D is a diagram illustrating a system identifier of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 5E is a diagram illustrating a carrier modulation mapping scheme of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 5F is a diagram illustrating a frequency conversion process identifier of TMCC information of a digital broadcast according to an embodiment of the present invention.

Fig. 5G is a diagram illustrating a physical channel number identifier of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 5H is a diagram illustrating a main signal identifier of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 5I is a diagram illustrating a 4K signal transmission layer identifier of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 5J is a diagram illustrating an additional hierarchical transmission identifier of TMCC information of a digital broadcast according to an embodiment of the present invention.

Fig. 5K is a diagram illustrating an identifier of a coding rate of intra-coding of TMCC information of digital broadcasting according to an embodiment of the present invention.

Fig. 6A is a diagram illustrating bit allocation of an AC signal of a digital broadcast according to an embodiment of the present invention.

Fig. 6B is a diagram illustrating a structural identifier of an AC signal of a digital broadcast according to an embodiment of the present invention.

Fig. 6C is a diagram illustrating seismic-alert information for a digitally broadcast AC signal according to one embodiment of the invention.

Fig. 6D is a diagram illustrating a signal identifier of seismic-alert information for a digitally broadcast AC signal according to one embodiment of the invention.

Fig. 6E is a diagram illustrating the seismic-alert detailed information of the seismic-alert information of the digitally broadcast AC signal of one embodiment of the invention.

Fig. 6F is a diagram illustrating the detailed information of the earthquake alarm information of the digitally broadcast AC signal, according to one embodiment of the invention.

Fig. 6G is a diagram illustrating additional information on transmission control of a modulated wave of an AC signal of a digital broadcast according to an embodiment of the present invention.

Fig. 6H is a diagram illustrating transmission parameter additional information of an AC signal of a digital broadcast according to an embodiment of the present invention.

Fig. 6I is a diagram illustrating an error correction method of an AC signal of a digital broadcast according to an embodiment of the present invention.

Fig. 6J is a diagram illustrating a constellation format of an AC signal of a digital broadcast according to an embodiment of the present invention.

Fig. 7A is a diagram illustrating a polarized wave dual-purpose transmission scheme according to an embodiment of the present invention.

Fig. 7B is a system configuration diagram of a broadcasting system using a polarized wave dual transmission scheme according to an embodiment of the present invention.

Fig. 7C is a system configuration diagram of a broadcasting system using a polarized wave dual transmission scheme according to an embodiment of the present invention.

Fig. 7D is a diagram illustrating a frequency conversion process according to an embodiment of the present invention.

Fig. 7E is a diagram illustrating the structure of a pass-through transmission scheme according to an embodiment of the present invention.

Fig. 7F is a diagram illustrating pass-through transmission bands of one embodiment of the present invention.

Fig. 7G is a diagram illustrating a structure of a through transmission scheme according to an embodiment of the present invention.

Fig. 7H is a diagram illustrating pass-through transmission bands of one embodiment of the present invention.

Fig. 7I is a diagram illustrating pass-through transmission bands of one embodiment of the present invention.

Fig. 7J is a diagram illustrating a single polarized wave transmission scheme according to an embodiment of the present invention.

Fig. 7K is a system configuration diagram of a broadcasting system using a single polarization transmission scheme according to an embodiment of the present invention.

Fig. 8A is a diagram illustrating a layer division multiplexing transmission scheme according to an embodiment of the present invention.

Fig. 8B is a system configuration diagram of a broadcasting system using a layer division multiplexing transmission scheme according to an embodiment of the present invention.

Fig. 8C is a diagram illustrating a frequency conversion amplifying process of an embodiment of the present invention.

Fig. 8D is a system configuration diagram of a broadcasting system using a layer division multiplexing transmission scheme according to an embodiment of the present invention.

Fig. 9A is a diagram illustrating a protocol stack of the MPEG-2 TS.

Fig. 9B is a diagram illustrating names and functions of tables used in the MPEG-2 TS.

Fig. 9C is a diagram illustrating names and functions of tables used in the MPEG-2 TS.

Fig. 9D is a diagram illustrating names and functions of descriptors used in the MPEG-2 TS.

Fig. 9E is a diagram illustrating names and functions of descriptors used in the MPEG-2 TS.

Fig. 9F is a diagram illustrating names and functions of descriptors used in the MPEG-2 TS.

Fig. 9G is a diagram illustrating names and functions of descriptors used in the MPEG-2 TS.

Fig. 9H is a diagram illustrating names and functions of descriptors used in the MPEG-2 TS.

Fig. 9I is a diagram illustrating names and functions of descriptors used in the MPEG-2 TS.

Fig. 10A is a diagram illustrating a protocol stack in a broadcast channel of an MMT.

Fig. 10B is a diagram illustrating a protocol stack in a communication line of the MMT.

Fig. 10C is a diagram illustrating names and functions of tables used in TLV-SI of MMT.

Fig. 10D is a diagram illustrating names and functions of descriptors used in TLV-SI of MMT.

Fig. 10E is a diagram illustrating names and functions of messages used in MMT-SI of MMT.

Fig. 10F is a diagram illustrating names and functions of tables used in MMT-SI of MMT.

Fig. 10G is a diagram illustrating names and functions of descriptors used in MMT-SI of MMT.

Fig. 10H is a diagram illustrating names and functions of descriptors used in MMT-SI of MMT.

Fig. 10I is a diagram illustrating names and functions of descriptors used in MMT-SI of MMT.

Fig. 10J is a diagram illustrating a relationship between data transfer and tables in the MMT system.

Fig. 11A is a sequence diagram of operations of a channel setting process of the broadcast receiving apparatus according to an embodiment of the present invention.

Fig. 11B is a diagram illustrating a data structure of the network information table.

Fig. 11C is a diagram illustrating a data structure of a terrestrial distribution system descriptor.

Fig. 11D is a diagram illustrating a data structure of the service list descriptor.

Fig. 11E is a diagram illustrating a data structure of the TS information descriptor.

Fig. 12A is an external view of a remote controller according to an embodiment of the present invention.

Fig. 12B is a diagram illustrating a banner display upon channel selection in accordance with one embodiment of the present invention.

Fig. 13A is a diagram illustrating an example of a control information transmission structure according to an embodiment of the present invention.

Fig. 13B is a diagram illustrating an example of a control information transmission structure according to an embodiment of the present invention.

Fig. 13C is a diagram illustrating an example of a control information transmission structure according to an embodiment of the present invention.

Fig. 13D is a diagram illustrating an example of a control information transmission structure according to an embodiment of the present invention.

Fig. 13E is a diagram illustrating an example of a control information transmission structure according to an embodiment of the present invention.

Fig. 13F is a diagram illustrating an example of a control information transmission structure according to an embodiment of the present invention.

Fig. 14A is a diagram illustrating an example of channel setting processing according to an embodiment of the present invention.

Fig. 14B is a diagram illustrating an example of channel setting processing according to an embodiment of the present invention.

Fig. 14C is a diagram illustrating a data structure of a service descriptor.

Fig. 14D is a diagram illustrating a list of service type.

Fig. 14E is a diagram illustrating a data structure of a service packet descriptor.

Fig. 14F is a diagram illustrating a list of service packet types.

Fig. 14G is a diagram illustrating an example of channel setting processing according to an embodiment of the present invention.

Fig. 15 is a diagram illustrating an example of an operation sequence of the network switching process.

Fig. 16 is an external view of a remote controller provided with a "synchronous switching key".

Fig. 17 is a diagram illustrating an example of an operation sequence in the case where the "synchronous switching key" is pressed.

Fig. 18 is a diagram illustrating message display in the case where there is no synchronized broadcast.

Detailed Description

Examples of embodiments of the present invention will be described below with reference to the drawings.

Example 1

[ System Structure ]

Fig. 1 is a system configuration diagram showing an example of a configuration of a broadcast system.

The broadcast system includes, for example, a broadcast receiving apparatus 100 and an antenna 200, a radio tower 300 and a broadcast station server 400 of a broadcast station, a service operator server 500, a mobile phone communication server 600, a base station 600B of a mobile phone communication network, a portable information terminal 700, a broadband network 800 such as the internet, and a router apparatus 800R. In addition, various server apparatuses and communication devices may be further connected to the internet 800.

The broadcast receiving apparatus 100 is a television receiver having a receiving function of an advanced digital broadcast service. The broadcast receiving apparatus 100 may further have a function of receiving an existing digital broadcast service. Further, in cooperation with a function of using a broadband network in a digital broadcast service (existing digital broadcast service or advanced digital broadcast service), a broadcast communication cooperation system can be supported in which additional content is acquired via the broadband network, arithmetic processing in a server device, presentation processing realized by cooperation with a mobile terminal device, and the like are combined with the digital broadcast service. The broadcast receiving apparatus 100 receives digital broadcast waves transmitted from the radio tower 300 via the antenna 200. The digital broadcast wave may be transmitted directly from the radio tower 300 to the antenna 200, or may be transmitted via a broadcast satellite, a communication satellite, or the like, which is not shown. Broadcast signals forwarded by the cable television station may also be received via a cable line or the like. The broadcast receiving apparatus 100 is connectable to the internet 800 via the router apparatus 800R, and can transmit and receive data by communicating with each server apparatus on the internet 800.

The router device 800R is connected to the internet 800 by wireless communication or wired communication, and is connected to the broadcast receiving device 100 by wired communication and the portable information terminal 700 by wireless communication. Thus, the server apparatus and the broadcast receiving apparatus 100 on the internet 800 and the portable information terminal 700 can transmit and receive data to and from each other via the router apparatus 800R. The router device 800R, the broadcast receiving device 100, and the portable information terminal 700 constitute a LAN (Local Area Network: local area network). The communication between the broadcast receiving apparatus 100 and the portable information terminal 700 may be performed directly by BlueTooth (registered trademark) or NFC (Near Field Communication: near field communication) or the like, instead of via the router apparatus 800R.

The radio tower 300 is a broadcasting device of a broadcasting station that transmits digital broadcast waves including various control information related to digital broadcast services and content data (moving image content, sound content, and the like) of broadcast programs. The broadcast station includes a broadcast station server 400. The broadcast station server 400 stores content data of broadcast programs and metadata such as program titles, program IDs, program summaries, participants, broadcast dates and times of the respective broadcast programs. The broadcast station server 400 provides the above-described content data and metadata to the service operator according to a contract. The content data and metadata are provided to the service operator through an API (Application Programming Interface: application program interface) provided in the broadcast station server 400.

The service operator server 500 is a server device prepared by a service operator for providing a service based on the broadcast communication cooperation system. The service operator server 500 stores, manages, and distributes content data and metadata provided from the broadcast station server 400, and content data and application programs (operation programs, various data, and the like) created for the broadcast communication collaboration system. In addition, the system also has a function of searching for available application programs and providing a list for an inquiry from a television receiver. The storage, management, distribution, and the like of the content data and the metadata, and the storage, management, distribution, and the like of the application program may be performed by different server apparatuses. The broadcast station may be the same as the service operator or may be a different operator. The service operator server 500 may prepare a plurality for each different service. The functions of the service provider server 500 may be also shared by the broadcast station server 400.

The mobile phone communication server 600 is connected to the internet 800, and is connected to the portable information terminal 700 via the base station 600B. The mobile phone communication server 600 manages telephone communication (call) and data transmission/reception by the mobile information terminal 700 via the mobile phone communication network, and enables the mobile information terminal 700 and each server device on the internet 800 to transmit/receive data by communication. The communication between the mobile information terminal 700 and the broadcast receiving apparatus 100 may be performed via the base station 600B, the mobile phone communication server 600, the internet 800, and the router apparatus 800R.

[ hardware Structure of broadcast receiving apparatus ]

Fig. 2A is a block diagram showing an example of the internal configuration of the broadcast receiving apparatus 100.

The broadcast receiving apparatus 100 includes a main control unit 101, a system bus 102, a ROM103, a RAM104, a storage (accumulation) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 125, a first modem unit 130C, a second modem unit 130T, a third modem unit 130L, a fourth modem unit 130B, a first decoder unit 140S, a second decoder unit 140U, an operation input unit 180, a video selection unit 191, a monitor unit 192, a video output unit 193, a sound selection unit 194, a speaker unit 195, and a sound output unit 196.

The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving apparatus 100 according to a predetermined operation program. The system bus 102 is a communication path for transmitting and receiving data, commands, and the like between the main control unit 101 and each operation module in the broadcast receiving apparatus 100.

The ROM (Read Only Memory) 103 is a nonvolatile Memory in which basic operation programs such as an operating system and other operation programs are stored, and is a rewritable ROM such as an EEPROM (Electrically Erasable Programmable ROM: electrically erasable Read Only Memory) or a flash ROM. Further, in the ROM103, operation setting values and the like necessary for the operation of the broadcast receiving apparatus 100 are stored. The RAM (Random Access Memory: random access memory) 104 is a work area when a basic operation program and other operation programs are executed. The ROM103 and RAM104 may be integrated with the main control unit 101. Further, the ROM103 may use a part of the storage area in the storage (accumulation) unit 110 instead of the independent structure shown in fig. 2A.

The storage (accumulation) unit 110 stores an operation program and an operation setting value of the broadcast receiving apparatus 100, personal information of a user of the broadcast receiving apparatus 100, and the like. Further, an operation program downloaded via the internet 800, various data generated by the operation program, and the like can be stored. Further, contents such as moving images, still images, and audio acquired from broadcast waves or downloaded via the internet 800 may be stored. A partial area of the storage (accumulation) unit 110 may be used instead of all or a part of the functions of the ROM 103. The storage (accumulation) unit 110 needs to hold stored information even when no power is supplied to the broadcast receiving apparatus 100 from the outside. For this reason, devices such as a semiconductor element memory such as a flash ROM or an SSD (Solid State Drive) and a magnetic disk Drive such as an HDD (Hard disk Drive) are used.

The above-described operation programs stored in the ROM103 and the storage (accumulation) unit 110 can be added, updated, and expanded in function by the download processing from each server device and broadcast wave on the internet 800.

The LAN communication unit 121 is connected to the internet 800 via the router device 800R, and transmits and receives data to and from each server device and other communication devices on the internet 800. In addition, acquisition of content data (or a part thereof) of a program transmitted via a communication line is also performed. The connection with the router device 800R may be a wired connection or a wireless connection such as Wi-Fi (registered trademark). The LAN communication unit 121 includes an encoding circuit, a decoding circuit, and the like. The broadcast receiving apparatus 100 may further include a BlueTooth (registered trademark) communication unit, an NFC communication unit, an infrared communication unit, and other communication units.

The first modem unit 130C and the second modem unit 130T, and the third modem unit 130L and the fourth modem unit 130B respectively receive broadcast waves of the digital broadcast service, and perform channel selection processing (channel selection) by modulating to a channel of a predetermined service based on the control of the main control unit 101. Further, a demodulation process, a waveform shaping process, and the like of a modulated wave of a received signal, a reconstruction process of a frame structure and a layer structure, an energy back diffusion process, an error correction decoding process, and the like are performed to reproduce a packet stream. In addition, a transmission TMCC (Transmission Multiplexing Configuration Control: transmission and multiplexing configuration control) signal extracted from the received signal and decoding processing are performed.

The first modem 130C can input the digital broadcast wave of the existing terrestrial digital broadcast service received by the antenna 200C, which is the existing terrestrial digital broadcast receiving antenna. The first modem 130C can also input a polarized broadcast signal of one of a horizontal (H) polarized signal and a vertical (V) polarized signal of the polarized dual-purpose terrestrial digital broadcast described later, and demodulate a segment of a layer using the same modulation scheme as the existing terrestrial digital broadcast service. The first modem 130C can also input a broadcast signal of the single-polarization terrestrial digital broadcast described later, and demodulate a segment of a layer using the same modulation scheme as the existing terrestrial digital broadcast service. The first modem 130C can also input a broadcast signal of a layer-division multiplexing digital terrestrial broadcast, which will be described later, and demodulate a segment of a layer using the same modulation scheme as that of the existing digital terrestrial broadcast service.

The second modem 130T receives digital broadcast waves of the advanced terrestrial digital broadcast service received by the antenna 200T, which is an antenna for receiving polarized terrestrial digital broadcast, via the converter 201T. The second modem 130T may input a digital broadcast wave of the advanced terrestrial digital broadcast service received by a single polarization terrestrial digital broadcast receiving antenna (not shown). The second modem 130T may not pass through the converter 201T when the digital broadcast wave of the advanced terrestrial digital broadcast service is input from a single polarization terrestrial digital broadcast receiving antenna (not shown). The antenna 200T for receiving digital broadcast waves of the polarized terrestrial digital broadcast includes an element for receiving a horizontally polarized wave signal and an element for receiving a vertically polarized wave signal. An antenna (not shown) for receiving a single polarized terrestrial digital broadcast includes any one of an element for receiving a horizontally polarized signal and an element for receiving a vertically polarized signal. An antenna (not shown) for receiving a single polarized terrestrial digital broadcast may be shared with the antenna 200C, which is a conventional antenna for receiving a terrestrial digital broadcast.

The third modem 130L inputs the digital broadcast wave of the advanced terrestrial digital broadcast service received by the antenna 200L, which is the terrestrial digital broadcast receiving antenna, through the converter 201L.

The fourth modem 130B inputs digital broadcast waves of the advanced BS (Broadcasting Satellite: broadcast satellite) digital broadcast service and the advanced CS (Communication Satellite: communication satellite) digital broadcast service received by the antenna 200B, which is an antenna for BS/CS common reception, via the converter 201B.

The expression "modem" means a component having a tuner function and a demodulation function.

The antennas 200C, 200T, 200L, 200B, 201T, 201L, and 201B do not form part of the broadcast receiving apparatus 100, but are devices such as a building in which the broadcast receiving apparatus 100 is installed.

The conventional terrestrial digital broadcasting is a broadcasting signal of a terrestrial digital broadcasting service for transmitting video with a maximum resolution of 1920 pixels horizontally×1080 pixels vertically.

Further, details concerning the polarized dual-purpose terrestrial digital broadcasting (advanced terrestrial digital broadcasting employing the polarized dual-purpose transmission scheme) and the single-polarized terrestrial digital broadcasting (advanced terrestrial digital broadcasting employing the single-polarized transmission scheme) will be described later, which are broadcast signals of a terrestrial digital broadcasting service capable of transmitting an image with a maximum resolution of more than the number of pixels of 1920 pixels horizontally×1080 pixels vertically. The polarized wave dual-purpose terrestrial digital broadcasting is a terrestrial digital broadcasting using a plurality of polarized waves, i.e., a horizontal (H) polarized wave and a vertical (V) polarized wave, and is a terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels in horizontal direction x 1080 pixels in vertical direction, using a part of the divided segments of both polarized waves. The single polarization terrestrial digital broadcasting is terrestrial digital broadcasting using a polarized wave of either a horizontal (H) polarized wave or a vertical (V) polarized wave, and is a terrestrial digital broadcasting service capable of transmitting an image with a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically, using a part of the segments obtained by division.

In the description of the embodiments of the present invention, when the expression "plural kinds of polarized waves" is used for the polarized wave dual-purpose terrestrial digital broadcasting, 2 polarized waves, that is, a horizontal (H) polarized wave and a vertical (V) polarized wave, are expressed unless otherwise specified. In addition, the expression "polarized wave" is used only to indicate "polarized wave signal". In addition, in the polarized wave of one or both of the plurality of polarized waves, a part of the divided segments can be transmitted in the same modulation scheme as the above-described conventional terrestrial digital broadcasting for transmitting an image having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically. That is, in the terrestrial digital broadcasting for both polarization, it is possible to simultaneously transmit an existing terrestrial digital broadcasting service for transmitting an image having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically and a terrestrial digital broadcasting service for transmitting an image having a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically using different segments of a plurality of polarization in each of the embodiments of the present invention. In addition, the single polarization terrestrial digital broadcasting can be transmitted in the same modulation scheme as the conventional terrestrial digital broadcasting for transmitting an image having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically using a part of the divided segments. That is, in the single polarization terrestrial digital broadcasting, the current terrestrial digital broadcasting service for transmitting an image having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically and the terrestrial digital broadcasting service for transmitting an image having a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically can be simultaneously transmitted by using different segments of the embodiments of the present invention.

Further, details concerning the layer multiplexing terrestrial digital broadcasting (advanced terrestrial digital broadcasting employing the layer multiplexing transmission scheme) will be described later, which is a broadcast signal of a terrestrial digital broadcasting service capable of transmitting an image with a maximum resolution of more than the number of pixels of 1920 pixels horizontally×1080 pixels vertically. The layer multiplexing terrestrial digital broadcasting multiplexes a plurality of digital broadcasting signals having different signal levels. Wherein, the digital broadcasting signals with different signal levels refer to different power for transmitting the digital broadcasting signals. The layer division multiplexing terrestrial digital broadcasting according to the embodiments of the present invention can transmit, as a plurality of types of digital broadcasting signals having different signal levels, broadcasting signals of an existing terrestrial digital broadcasting service that transmits video having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically and broadcasting signals of a terrestrial digital broadcasting service that transmits video having a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically in a frequency band of the same physical channel in a layer division multiplexing manner. That is, in the layer division multiplexing terrestrial digital broadcasting according to the embodiments of the present invention, it is possible to simultaneously transmit, with a plurality of layers having different signal levels, an existing terrestrial digital broadcasting service for transmitting an image having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically and a terrestrial digital broadcasting service for transmitting an image having a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically.

The broadcast receiving apparatus according to each embodiment of the present invention may be configured to satisfactorily receive advanced digital broadcasting, and may not necessarily include all of the first modem 130C and the second modem 130T, and the third modem 130L and the fourth modem 130B. For example, at least one of the second modem 130T and the third modem 130L may be provided. In order to realize a more advanced function, 1 or more of the 4 modems may be provided in addition to one of the second modem 130T and the third modem 130L.

The antennas 200C, 200T, and 200L may also be used as appropriate. In the first modem 130C, the second modem 130T, and the third modem 130L, a plurality of modems may be used together (or combined) as appropriate.

The first decoder unit 140S and the second decoder unit 140U input the packet streams output from the first modem unit 130C and the second modem unit 130T and the third modem unit 130L and the fourth modem unit 130B, respectively, or the packet streams acquired from the respective server devices on the internet 800 via the LAN communication unit 121. The packet streams input the first decoder 140S and the second decoder 140U may be packet streams in the format of MPEG (Moving Picture Experts Group: moving picture experts group) -2TS (Transport Stream) or MPEG-2PS (Program Stream), TLV (Type Length Value: type length value), MMT (MPEG Media Transport: moving picture experts group media Transport), or the like.

The first decoder unit 140S and the second decoder unit 140U perform a conditional access (Conditional Access: CA) process, a multiplexing separation process for separating and extracting video data, audio data, various information data, and the like from the packet stream based on various control information included in the packet stream, a decoding process for video data and audio data, an EPG (Electronic Program Guide: electronic program guide) generation process for acquiring program information, a reproduction process for data broadcast pictures, multimedia data, and the like, respectively. Further, processing is performed to superimpose the generated EPG or reproduced multimedia data with the decoded video data and audio data.

The video selecting unit 191 receives the video data output from the first decoder unit 140S and the video data output from the second decoder unit 140U, and appropriately performs processing such as selection and/or superimposition based on the control of the main control unit 101. The video selector 191 performs scaling processing, OSD (On Screen Display: on screen display) data superimposing processing, and the like as appropriate. The monitor 192 is, for example, a display device such as a liquid crystal panel, and displays video data subjected to selection and/or superimposition processing by the video selecting unit 191, and provides the video data to a user of the broadcast receiving apparatus 100. The image output unit 193 is an image output interface for outputting the image data subjected to the selection and/or superimposition processing by the image selection unit 191 to the outside.

The audio selecting unit 194 receives the audio data output from the first decoder unit 140S and the audio data output from the second decoder unit 140U, and performs processing such as selection and/or mixing appropriately based on the control of the main control unit 101. The speaker unit 195 outputs the audio data subjected to the selection and/or mixing process by the audio selection unit 194, and provides the audio data to the user of the broadcast receiving apparatus 100. The audio output unit 196 is an audio output interface for outputting the audio data subjected to the selection and/or mixing process by the audio selection unit 194 to the outside.

The digital interface section 125 is an interface that outputs or inputs a packet stream including encoded digital video data and/or digital audio data. The digital interface section 125 can directly output the packet streams input from the first decoder section 140S or the second decoder section 140U from the first modem section 130C and the second modem section 130T and the third modem section 130L and the fourth modem section 130B. The packet stream input from the outside through the digital interface unit 125 may be input to the first decoder unit 140S or the second decoder unit 140U or may be stored in the storage (accumulation) unit 110. Alternatively, the video data and the audio data extracted by the first decoder 140S or the second decoder 140U may be output. The image data and the sound data input from the outside through the digital interface unit 125 may be input to the first decoder unit 140S or the second decoder unit 140U or may be stored (accumulated) in the storage unit 110.

The expansion interface unit 124 is an interface group for expanding the functions of the broadcast receiving apparatus 100, and is configured by an analog video/audio interface, a USB (Universal Serial Bus: universal serial bus) interface, a memory interface, and the like. The analog video/audio interface performs input of an analog video signal/audio signal from an external video/audio output device, output of an analog video signal/audio signal from an external video/audio input device, and the like. The USB interface is connected to a PC or the like, and transmits and receives data. The HDD may be connected to record a broadcast program or other content data. In addition, a keyboard or other USB device connection may also be made. The memory interface is connected to a memory card or other storage medium and performs transmission and reception of data.

The operation input unit 180 is an instruction input unit for inputting an operation instruction to the broadcast receiving apparatus 100, and is configured by a remote controller receiving unit for receiving a command transmitted from a remote controller (remote controller), not shown, and operation keys in which button switches are arranged. Only one of them may be used. The operation input unit 180 may be replaced with a touch panel or the like disposed so as to overlap the monitor unit 192. A keyboard or the like connected to the expansion interface 124 may be used instead. The remote controller can be replaced with a portable information terminal 700 having a remote controller command transmission function.

In addition, in the case where the broadcast receiving apparatus 100 is a television receiver or the like, the video output unit 193 and the audio output unit 196 are not necessarily configured. The broadcast receiving apparatus 100 may be an optical disk drive recorder such as a DVD (Digital Versatile Disc: digital versatile disk) recorder, a magnetic disk drive recorder such as an HDD recorder, a STB (Set Top Box) or the like. A PC (Personal Computer: personal computer) or tablet terminal having a function of receiving digital broadcasting service may be used. In the case where the broadcast receiving apparatus 100 is a DVD recorder, HDD recorder, STB, or the like, the monitor unit 192 and the speaker unit 195 are not necessarily configured. The same operation as that of a television receiver or the like can be performed by connecting an external monitor and an external speaker to the video output unit 193 and the audio output unit 196 or the digital interface unit 125.

Fig. 2B is a block diagram showing an example of the detailed configuration of the first modem 130C.

The channel selection/detection unit 131C receives the current digital broadcast wave received by the antenna 200C, and performs channel selection based on the channel selection control signal. The TMCC decoding unit 132C extracts a TMCC signal from the output signal of the tuning/detecting unit 131C, and acquires various kinds of TMCC information. The acquired TMCC information is used for control of each process of the back end. Details concerning the TMCC signal and the TMCC information are described later.

The demodulation unit 133C receives modulated waves modulated by means of QPSK (Quadrature Phase Shift Keying: quadrature phase shift coding), DQPSK (Differential QPSK: differential quadrature phase shift coding), 16QAM (Quadrature Amplitude Modulation: quadrature amplitude modulation), 64QAM, or the like, based on TMCC information or the like, and performs demodulation processing including frequency deinterleaving, time deinterleaving, carrier demapping processing, and the like. The demodulation unit 133C may further support a modulation scheme different from the above-described modulation schemes.

The stream playback unit 134C performs inner-encoding error correction processing such as layering processing, viterbi decoding, etc., outer-encoding error correction processing such as energy back-diffusion processing, stream playback processing, RS (Reed Solomon) decoding, etc. As the error correction processing, processing different from the above-described modes may be used. The packet stream to be reproduced and outputted by the stream reproducing unit 134C is, for example, an MPEG-2 TS. Other formats of packet streams are also possible.

Fig. 2C is a block diagram showing an example of the detailed configuration of the second modem 130T.

The channel selection/detection unit 131H receives the horizontal (H) polarized wave signal of the digital broadcast wave received by the antenna 200T, and performs channel selection based on the channel selection control signal. The channel selection/detection unit 131V receives the vertical (V) -polarized signal of the digital broadcast wave received by the antenna 200T, and performs channel selection based on the channel selection control signal. The operation of the channel selection process in the channel selection/detection unit 131H and the operation of the channel selection process in the channel selection/detection unit 131V may be controlled in a coordinated manner or may be controlled independently. That is, the tuning/detecting section 131H and the tuning/detecting section 131V may be regarded as one tuning/detecting section and controlled so as to select 1 channel of the digital broadcasting service using the horizontal/vertical polarized wave transmission, or the tuning/detecting section 131H and the tuning/detecting section 131V may be regarded as two independent tuning/detecting sections and controlled so as to select two different channels of the digital broadcasting service using only the water Ping Pianzhen wave (or vertical polarized wave transmission).

The horizontal (H) polarized wave signal and the vertical (V) polarized wave signal received by the second modem 130T of the broadcast receiving apparatus according to each embodiment of the present invention may be a polarized wave signal based on a broadcast wave whose polarization directions differ by approximately 90 degrees, or the horizontal (H) polarized wave signal and the vertical (V) polarized wave signal described below may be configured to be opposite to each other with respect to their reception.

The TMCC decoding unit 132H extracts a TMCC signal from the output signal of the tuning/detecting unit 131H, and acquires various kinds of TMCC information. The TMCC decoding unit 132V extracts a TMCC signal from the output signal of the tuning/detecting unit 131V, and acquires various kinds of TMCC information. Only one of the TMCC decoding unit 132H and the TMCC decoding unit 132V may be used. The acquired TMCC information is used for control of each process in the back end.

The demodulation units 133H and 133V respectively input modulated waves modulated by the methods such as BPSK (Binary Phase Shift Keying: binary phase shift keying), DBPSK (Differential BPSK: differential binary phase shift keying), QPSK, DQPSK, 8PSK (Phase Shift Keying: phase shift keying), 16APSK (Amplitude and Phase Shift Keying: amplitude phase shift keying), 32APSK, 16QAM, 64QAM, 256QAM, 1024QAM, and the like based on TMCC information and perform demodulation processing including frequency deinterleaving, time deinterleaving, carrier demapping processing, and the like. The demodulation unit 133H and the demodulation unit 133V can further support modulation schemes different from the respective modulation schemes described above.

The stream playback unit 134H and the stream playback unit 134V perform inner-encoding error correction processing such as layering processing, viterbi decoding, and LDPC (Low Density Parity Check: low density parity check) decoding, outer-encoding error correction processing such as energy back-diffusion processing, stream playback processing, RS decoding, and BCH decoding, and the like, respectively. As the error correction processing, processing different from the above-described modes may be used. The packet stream to be reproduced and outputted by the stream reproducing unit 134H is, for example, an MPEG-2 TS. The packet stream reproduced and outputted by the stream reproducing unit 134V is, for example, an MPEG-2TS, TLV including an MMT packet stream, or the like. Other formats of packet streams are also possible.

In the case where the second modem 130T receives the digital broadcast wave of the single polarization terrestrial digital broadcast, the tuning/detecting unit 131V, the TMCC decoding unit 132V, and the demodulation unit 133V may not be provided. In the case where the existing terrestrial digital broadcasting service and the advanced terrestrial digital broadcasting service are simultaneously transmitted by different segments, the signal of the segment transmitting the existing terrestrial digital broadcasting service among the signals outputted from the decoding unit 133H is inputted to the stream reproducing unit 134H, and the signal of the segment transmitting the advanced terrestrial digital broadcasting service is inputted to the stream reproducing unit 134V.

Fig. 2D is a block diagram showing an example of the detailed configuration of the third modem 130L.

The channel selection/detection unit 131L receives the digital broadcast wave subjected to the layer division multiplexing (Layered Division Multiplexing: LDM) process from the antenna 200L, and performs channel selection based on the channel selection control signal. Of the digital broadcast waves subjected to the Layer division multiplexing process, the Upper Layer (UL) modulated wave and the Lower Layer (LL) modulated wave may be used to transmit different digital broadcast services (or different channels of the same broadcast service). The modulated wave of the upper layer is output to the demodulation unit 133S, and the modulated wave of the lower layer is output to the demodulation unit 133L.

The TMCC decoding unit 132L receives the upper modulated wave and the lower modulated wave outputted from the tuning/detecting unit 131L, extracts a TMCC signal, and obtains various kinds of TMCC information. The signal input to the TMCC decoding unit 132L may be only one of the upper-layer modulated wave and the lower-layer modulated wave.

The demodulation units 133S and 133L perform the same operations as the demodulation units 133H and 133V, and therefore detailed descriptions thereof are omitted. The stream playback unit 134S and the stream playback unit 134L perform the same operations as the stream playback unit 134H and the stream playback unit 134V, respectively, and therefore detailed descriptions thereof are omitted.

Fig. 2E is a block diagram showing an example of the detailed configuration of the fourth modem 130B.

The channel selection/detection unit 131B receives digital broadcast waves of the advanced BS digital broadcast service and the advanced CS digital broadcast service received by the antenna 200B, and performs channel selection based on the channel selection control signal. Other operations are the same as the tuning/detecting section 131H and the tuning/detecting section 131V, and therefore, detailed description thereof is omitted. The TMCC decoding unit 132B, the demodulation unit 133B, and the stream playback unit 134B also perform the same operations as the TMCC decoding unit 132H and the TMCC decoding unit 132V, the demodulation unit 133H, the demodulation unit 133V, and the stream playback unit 134V, respectively, and therefore detailed descriptions thereof are omitted.

Fig. 2F is a block diagram showing an example of the detailed configuration of the first decoder section 140S.

The selection unit 141S selects 1 output from the packet stream input from the first modem unit 130C, the packet stream input from the second modem unit 130T, and the packet stream input from the third modem unit 130L, based on the control of the main control unit 101. The packet streams input from the first modem 130C, the second modem 130T, and the third modem 130L are, for example, MPEG-2TS, or the like. The CA descrambler 142S performs a process of canceling the encryption algorithm of the predetermined scrambling scheme based on various control information on conditional reception superimposed on the packet stream.

The multiplexing/demultiplexing unit 143S is a stream decoder, and demultiplexes and extracts video data and audio data, superimposed text data, subtitle data, program information data, and the like based on various control information included in an input packet stream. The separated and extracted video data are respectively assigned to the video decoder 145S, the separated and extracted audio data are assigned to the audio decoder 146S, and the separated and extracted superimposed text data, caption data, program information data, and the like are assigned to the data decoder 144S. The multiplexing/demultiplexing unit 143S may receive a packet stream (e.g., MPEG-2 PS) acquired from a server device on the internet 800 via the LAN communication unit 121. The multiplexing/demultiplexing unit 143S can output the packet streams input from the first modem 130C, the second modem 130T, and the third modem 130L to the outside via the digital interface 125, and can input the packet streams acquired from the outside via the digital interface 125.

The video decoder 145S performs decoding processing of compression-encoded video information, chromaticity conversion processing, dynamic range conversion processing, and the like on the decoded video information on the video data input from the multiplexing/demultiplexing unit 143S. Further, processing such as resolution conversion (up/down conversion) is performed under control of the main control unit 101, and video data is output at a resolution such as UHD (horizontal 3840 pixels×vertical 2160 pixels), HD (horizontal 1920 pixels×vertical 1080 pixels), or SD (horizontal 720 pixels×vertical 480 pixels) as appropriate. Image data output at other resolutions may also be performed. The audio decoder 146S performs decoding processing or the like of the compression-encoded audio information. Further, a downmix process or the like is performed under control of the main control unit 101, and audio data is output in the number of channels such as 22.2ch, 7.1ch, 5.1ch, or 2 ch. In order to perform decoding processing of a plurality of video data and audio data simultaneously, a plurality of video decoders 145S and audio decoders 146S may be provided.

The data decoder 144S performs processing of generating an EPG based on program information data, data broadcast screen generation processing based on BML data, control processing of a cooperative application based on a broadcast communication cooperation function, and the like. The data decoder 144S has a BML browser function for executing a BML document, and the data broadcast screen generation process is executed by the BML browser function. The data decoder 144S performs processing for decoding superimposed text data to generate superimposed text information, processing for decoding subtitle data to generate subtitle information, and the like.

The superimposing units 147S, 148S, and 149S perform a process of superimposing the video data output from the video decoder 145S and the EPG, the data broadcast picture, or the like output from the data decoder 144S, respectively. The synthesizing unit 151S performs a process of synthesizing the audio data output from the audio decoder 146S and the audio data reproduced by the data decoder 144S. The selection unit 150S performs resolution selection of video data based on control of the main control unit 101. The functions of the superimposing units 147S, 148S, 149S, and 150S may be combined with the video selecting unit 191. The function of the synthesizing unit 151S may be combined with the sound selecting unit 194.

Fig. 2G is a block diagram showing an example of the detailed configuration of the second decoder section 140U.

The selection unit 141U selects 1 output from the packet stream input from the second modem unit 130T, the packet stream input from the third modem unit 130L, and the packet stream input from the fourth modem unit 130B, based on the control of the main control unit 101. The packet streams input from the second modem 130T and the third modem 130L and the fourth modem 130B are, for example, MMT packet streams or TLVs including MMT packet streams. A packet stream of the MPEG-2TS format may be used as the video compression system, such as HEVC (High Efficiency Video Coding: high efficiency video coding). The CA descrambler 142U performs a process of canceling the encryption algorithm of the predetermined scrambling scheme based on various control information on conditional reception superimposed on the packet stream.

The multiplexing/demultiplexing unit 143U is a stream decoder, and demultiplexes and extracts video data and audio data, superimposed text data, subtitle data, program information data, and the like based on various control information included in an input packet stream. The separated and extracted video data are respectively distributed to the video decoder 145U, the separated and extracted audio data are distributed to the audio decoder 146U, and the separated and extracted superimposed text data, caption data, program information data, and the like are distributed to the multimedia decoder 144U. The multiplexing/demultiplexing unit 143U may input a packet stream (for example, an MPEG-2PS or MMT packet stream) acquired from a server device on the internet 800 via the LAN communication unit 121. The multiplexing/demultiplexing unit 143U can output the packet streams input from the second modem 130T, the third modem 130L, and the fourth modem 130B to the outside via the digital interface 125, and can input the packet streams acquired from the outside via the digital interface 125.

The multimedia decoder 144U performs processing for generating an EPG based on the program information data, multimedia picture generation processing based on the multimedia data, control processing for a cooperative application based on a broadcast communication cooperation function, and the like. The multimedia decoder 144U has an HTML browser function for executing an HTML document, and the multimedia picture generation process is executed by the HTML browser function.

The video decoder 145U and the audio decoder 146U and the superimposing unit 147U and the superimposing unit 148U and the superimposing unit 149U and the synthesizing unit 151U and the selecting unit 150U are constituent parts having the same functions as the video decoder 145S and the audio decoder 146S and the superimposing unit 147S and the superimposing unit 148S and the superimposing unit 149S and the synthesizing unit 151S and the selecting unit 150S, respectively. In fig. 2F, the description of the video decoder 145U and the audio decoder 146U and the superimposing unit 147U and the superimposing unit 148U and the combining unit 151U and the selecting unit 150U in fig. 2G will be omitted because the description of the video decoder 145S and the audio decoder 146S and the superimposing unit 147S and the superimposing unit 148S and the combining unit 151S and the selecting unit 150S will be omitted by replacing the S at the end of the symbol with U.

[ software Structure of broadcast receiving apparatus ]

Fig. 2H is a software configuration diagram of the broadcast receiving apparatus 100, and shows an example of a software configuration in the storage (accumulation) unit 110 (or the ROM103, the same applies hereinafter) and the RAM 104. In the storage (accumulation) section 110, a basic operation program 1001 and a reception function program 1002 and a browser program 1003 and a content management program 1004 and other operation programs 1009 are stored. The storage (accumulation) unit 110 includes a content storage area 1011 for storing content data such as moving images, still images, and audio, an authentication information storage area 1012 for storing authentication information and the like used for communication and cooperation with external mobile terminal devices, server devices, and the like, and a variety of information storage areas 1019 for storing other variety of information.

The basic operation program 1001 stored in the storage (accumulation) unit 110 is deployed to the RAM104, and the main control unit 101 executes the deployed basic operation program, thereby configuring the basic operation control unit 1101. The reception function program 1002, the browser program 1003, and the content management program 1004 stored in the storage (accumulation) unit 110 are deployed to the RAM104, respectively, and the main control unit 101 executes the deployed operation programs, thereby configuring the reception function control unit 1102, the browser engine 1103, and the content management unit 1104. The RAM104 includes a temporary storage area 1200 for temporarily storing data generated when each operation program is executed, as needed.

In the following, for the sake of simplifying the description, the process of the main control unit 101 performing control of each operation module by disposing and executing the basic operation program 1001 stored in the storage (accumulation) unit 110 in the RAM104 will be described as the basic operation control unit 1101 performing control of each operation module. The same is described with respect to other operational procedures.

The reception function control unit 1102 performs basic control of a broadcast reception function, a broadcast communication cooperation function, and the like of the broadcast reception apparatus 100. In particular, the channel selection/demodulation unit 1102a mainly controls channel selection processing, TMCC information acquisition processing, demodulation processing, and the like in the first modem unit 130C and the second modem unit 130T, and the third modem unit 130L and the fourth modem unit 130B, and the like. The stream playback control unit 1102B mainly controls layering processing, error correction decoding processing, energy back diffusion processing, stream playback processing, and the like in the first modem unit 130C and the second modem unit 130T, and the third modem unit 130L and the fourth modem unit 130B, and the like. The AV decoding unit 1102c mainly controls multiplexing separation processing (stream decoding processing) and video data decoding processing, audio data decoding processing, and the like in the first decoder unit 140S, the second decoder unit 140U, and the like. The multimedia (MM) data reproduction section 1102d mainly controls the BML data reproduction process and the superimposed text data decoding process in the first decoder section 140S and the subtitle data decoding process and the control process of the communication cooperation application, the HTML data reproduction process and the multimedia picture generation process in the second decoder section 140U and the control process of the communication cooperation application, and the like. The EPG generating unit 1102e mainly controls the EPG generating process in the first decoder unit 140S and the second decoder unit 140U and the display process of the generated EPG. The rendering processing unit 1102f performs control of the chromaticity conversion process, the dynamic range conversion process, the resolution conversion process, the audio downmix process, and the like in the first decoder unit 140S and the second decoder unit 140U, and control of the video selection unit 191, the audio selection unit 194, and the like.

The BML browser 1103a and the HTML browser 1103b of the browser engine 1103 interpret the BML document and the HTML document at the time of the above-described BML data reproduction process and HTML data reproduction process, and perform a data broadcast screen generation process and a multimedia screen generation process.

The content management unit 1104 performs: a time schedule management and execution control at the time of recording reservation and viewing reservation of a broadcast program, a copyright management at the time of outputting a broadcast program, a recorded program, and the like from the digital interface section 125, the LAN communication section 121, and the like, a validity period management of a cooperative application acquired based on a broadcast communication cooperation function, and the like are performed.

Each of the above-described operation programs may be stored in advance in the storage (accumulation) unit 110 and/or the ROM103 at the time of shipment of the product. The product may be obtained from a server device on the internet 800 via the LAN communication unit 121 or the like after shipment. The respective operation programs stored in the memory card, the optical disk, or the like may be acquired through the expansion interface unit 124 or the like. Or may be newly acquired or updated via broadcast waves.

[ Structure of broadcasting station Server ]

Fig. 3A shows an example of the internal structure of the broadcast station server 400. Broadcast station server 400 includes a main control unit 401, a system bus 402, a RAM404, a storage unit 410, a LAN communication unit 421, and a digital broadcast signal transmission unit 460.

The main control unit 401 is a microprocessor unit that controls the entire broadcast station server 400 according to a predetermined operation program. The system bus 402 is a communication path for transmitting and receiving various data, commands, and the like between the main control unit 401 and each operation module in the broadcast station server 400. The RAM404 is a work area when each operation program is executed.

The storage section 410 stores a basic action program 4001 and a content management/distribution program 4002 and a content transmission program 4003, and also has a content data storage area 4011 and a metadata storage area 4012. The content data storage area 4011 stores content data and the like of each broadcast program broadcast by a broadcast station. The metadata storage area 4012 stores metadata such as a program title, a program ID, a program outline, a participant, and a broadcast date and time of each broadcast program.

The basic operation program 4001 and the content management/distribution program 4002 and the content transmission program 4003 stored in the storage unit 410 are deployed to the RAM404, respectively, and the main control unit 401 executes the deployed basic operation program and content management/distribution program and content transmission program, thereby configuring the basic operation control unit 4101 and the content management/distribution control unit 4102 and the content transmission control unit 4103.

In addition, for the sake of simplicity of description, the processing performed by the main control unit 401 to control each operation module by disposing and executing the basic operation program 4001 stored in the storage unit 410 in the RAM404 will be described below as the control of each operation module by the basic operation control unit 4101. The same is described with respect to other operational procedures.

The content management/distribution control unit 4102 manages content data, metadata, and the like stored in the content data storage area 4011 and the metadata storage area 4012, and controls to provide the service operator with the content data, metadata, and the like according to contracts. Further, when providing content data, metadata, and the like to the service operator, the content management/distribution control unit 4102 performs authentication processing and the like of the service operator server 500 as necessary.

The content transmission control unit 4103 performs time schedule management and the like when streams including content data of a broadcast program stored in the content data storage area 4011, program titles, program IDs, copy control information of program contents, and the like of the broadcast program stored in the metadata storage area 4012 are transmitted via the digital broadcast signal transmission unit 460.

The LAN communication unit 421 is connected to the internet 800, and performs communication with the service provider server 500 and other communication devices on the internet 800. The LAN communication unit 421 includes an encoding circuit, a decoding circuit, and the like. The digital broadcast signal transmitting unit 460 performs processing such as modulation on a stream composed of content data, program information data, and the like of each broadcast program stored in the content data storage area 4011, and transmits the stream as a digital broadcast wave via the radio tower 300.

[ Structure of service operator Server ]

Fig. 3B shows an example of the internal structure of the service provider server 500. The service provider server 500 includes a main control unit 501, a system bus 502, a RAM504, a storage unit 510, and a LAN communication unit 521.

The main control unit 501 is a microprocessor unit that controls the entire service provider server 500 according to a predetermined operation program. The system bus 502 is a communication path for transmitting and receiving various data, commands, and the like between the main control unit 501 and each operation module in the service provider server 500. The RAM504 is a work area when each operation program is executed.

The storage unit 510 stores a basic operation program 5001, a content management/distribution program 5002, and an application management/distribution program 5003, and further includes a content data storage area 5011, a metadata storage area 5012, and an application storage area 5013. The content data storage area 5011 and the metadata storage area 5012 store content data, metadata, and the like supplied from the broadcast station server 400, or content created by a service operator, metadata about the content, and the like. The application storage area 5013 stores application programs (operation programs, various data, and the like) required for realizing each service of the broadcast communication cooperation system for distribution in response to a request from each television receiver.

The basic operation program 5001 and the content management/distribution program 5002 and the application management/distribution program 5003 stored in the storage unit 510 are deployed to the RAM504, respectively, and the main control unit 501 executes the deployed basic operation program and content management/distribution program and application management/distribution program, thereby configuring the basic operation control unit 5101 and the content management/distribution control unit 5102 and the application management/distribution control unit 5103.

In addition, for the sake of simplicity of description, the processing of the main control unit 501 for performing control of each operation module by disposing and executing the basic operation program 5001 stored in the storage unit 510 in the RAM504 is described below as the control of each operation module by the basic operation control unit 5101. The same is described with respect to other operational procedures.

The content management/distribution control unit 5102 performs management of acquiring content data, metadata, and the like from the broadcast station server 400, content data, metadata, and the like stored in the content data storage area 5011 and the metadata storage area 5012, and control of distributing the content data, metadata, and the like to each television receiver. The application management/distribution control unit 5103 manages each application stored in the application storage area 5013 and controls when the application is distributed in response to a request from each television receiver. Further, the application management/distribution control unit 5103 performs authentication processing of the television receiver and the like as necessary when distributing each application program to each television receiver.

The LAN communication unit 521 is connected to the internet 800, and performs communication with the broadcasting station server 400 and other communication devices on the internet 800. In addition, communication with the broadcast receiving apparatus 100 and the portable information terminal 700 is performed via the router apparatus 800R. The LAN communication unit 521 includes an encoding circuit, a decoding circuit, and the like.

[ hardware Structure of Portable information terminal ]

Fig. 3C is a block diagram showing an example of the internal structure of portable information terminal 700.

The portable information terminal 700 includes a main control unit 701, a system bus 702, a ROM703, a RAM704, a storage unit 710, a communication processing unit 720, an expansion interface unit 724, an operation unit 730, an image processing unit 740, a sound processing unit 750, and a sensor unit 760.

The main control unit 701 is a microprocessor unit that controls the entire portable information terminal 700 according to a predetermined operation program. The system bus 702 is a communication path for transmitting and receiving various data, commands, and the like between the main control unit 701 and each operation module in the portable information terminal 700.

The ROM703 is a nonvolatile memory in which basic operation programs such as an operating system and other operation programs are stored, and is a rewritable ROM such as an EEPROM or a flash ROM. Further, in the ROM703, operation setting values and the like necessary for the operation of the portable information terminal 700 are stored. RAM704 is a work area where basic action programs and other action programs execute. The ROM703 and the RAM704 may be integrally formed with the main control section 701. The ROM703 may use a part of the storage area in the storage unit 710 instead of the independent structure shown in fig. 3C.

The storage unit 710 stores an operation program and operation setting values of the portable information terminal 700, personal information of the user of the portable information terminal 700, and the like. Further, an operation program downloaded via the internet 800, various data generated by the operation program, and the like can be stored. Further, contents such as moving images, still images, and audio downloaded via the internet 800 may be stored. A part of the memory unit 710 may be used instead of all or part of the functions of the ROM 703. The storage unit 710 needs to hold stored information even when no power is supplied to the portable information terminal 700 from the outside. Thus, for example, devices such as a semiconductor element memory such as a flash ROM or an SSD, and a magnetic disk drive such as an HDD are used.

The above-described operation programs stored in the ROM703 and the storage unit 710 can be added, updated, and expanded in function by the download processing from each server device on the internet 800.

The communication processing unit 720 includes a LAN communication unit 721, a mobile phone network communication unit 722, and an NFC communication unit 723. The LAN communication unit 721 is connected to the internet 800 via the router device 800R, and transmits and receives data to and from each server device and other communication devices on the internet 800. The connection with the router device 800R is made by wireless connection such as Wi-Fi (registered trademark). The mobile phone network communication unit 722 performs telephone communication (call) and data transmission/reception by wireless communication with the base station 600B of the mobile phone communication network. The NFC communication unit 723 performs wireless communication when approaching a corresponding reader/writer. The LAN communication unit 721 and the mobile phone communication network communication unit 722 and the NFC communication unit 723 each include an encoding circuit, a decoding circuit, an antenna, and the like. The communication processing unit 720 may further include another communication unit such as a BlueTooth (registered trademark) communication unit or an infrared communication unit.

The expansion interface unit 724 is an interface group for expanding the functions of the portable information terminal 700, and in this embodiment, is configured by an audio/video interface, a USB interface, a memory interface, and the like. The video/audio interface inputs video signals/audio signals from an external video/audio output device, outputs video signals/audio signals to an external video/audio input device, and the like. The USB interface is connected to a PC or the like, and transmits and receives data. In addition, a keyboard or other USB device connection may also be made. The memory interface is connected to a memory card or other storage medium and performs transmission and reception of data.

The operation unit 730 is an instruction input unit for inputting an operation instruction to the portable information terminal 700, and in the present embodiment, is configured by a touch panel 730T arranged to overlap the display unit 741 and operation keys 730K in which button switches are arranged. Only either one may be used. The operation of the portable information terminal 700 may be performed using a keyboard or the like connected to the expansion interface unit 724. The operation of the portable information terminal 700 may also be performed using a separate terminal device connected through wired communication or wireless communication. That is, the operation of the portable information terminal 700 may be performed from the broadcast receiving apparatus 100. The touch panel function may be provided by the display unit 741.

The image processing unit 740 includes a display unit 741, an image signal processing unit 742, a first image input unit 743, and a second image input unit 744. The display unit 741 is a display device such as a liquid crystal panel, for example, and provides the user of the portable information terminal 700 with image data processed by the image signal processing unit 742. The image signal processing unit 742 includes a video RAM, not shown, and drives the display unit 741 based on image data input to the video RAM. The image signal processing unit 742 has a function of performing format conversion, menu and other OSD (On Screen Display: on-screen display) signal superimposing processing, and the like, as necessary. The first image input unit 743 and the second image input unit 744 are camera units that convert light input from a lens into an electric signal by using an electronic device such as a CCD (Charge Coupled Device: charge coupled device) or CMOS (Complementary Metal Oxide Semiconductor: complementary metal oxide semiconductor) sensor, and input image data of surrounding and an object.

The sound processing unit 750 includes a sound output unit 751, a sound signal processing unit 752, and a sound input unit 753. The audio output unit 751 is a speaker, and provides the audio signal processed by the audio signal processing unit 752 to the user of the portable information terminal 700. The sound input unit 753 is a microphone, and converts a user's voice or the like into sound data to be input.

The sensor unit 760 is a sensor group for detecting the state of the portable information terminal 700, and in the present embodiment, is configured by a GPS receiver 761, a gyro sensor 762, a geomagnetic sensor 763, an acceleration sensor 764, an illuminance sensor 765, and a proximity sensor 766. With these sensor groups, the position, inclination, azimuth, movement, surrounding brightness, the proximity of surrounding objects, and the like of the portable information terminal 700 can be detected. The portable information terminal 700 may further include other sensors such as a barometric sensor.

The portable information terminal 700 may be a mobile phone or a smart phone, a tablet terminal, or the like. Or a PDA (Personal Digital Assistants: personal digital assistant) or a notebook PC. Further, the present invention may be applied to a digital still camera, a video camera capable of capturing moving images, a portable game machine, a navigation device, or other portable digital devices.

The configuration example of the portable information terminal 700 shown in fig. 3C includes a plurality of configurations such as the sensor unit 760, which are not necessary for the present embodiment, and the effects of the present embodiment are not impaired even if the configurations are not provided. Further, not-shown structures such as a digital broadcast receiving function and an electronic money settlement function may be added.

[ software Structure of Portable information terminal ]

Fig. 3D is a software configuration diagram of portable information terminal 700, and shows an example of the configuration of software in ROM703, RAM704, and storage unit 710. The ROM703 stores a basic operation program 7001 and other operation programs. The storage unit 710 stores the cooperation control program 7002 and other operation programs. The storage unit 710 includes a content storage area 7200 for storing content data such as moving images, still images, and audio, an authentication information storage area 7300 for storing authentication information and the like necessary for accessing the television receiver and each server device, and various information storage areas for storing other various information.

The basic operation program 7001 stored in the ROM703 is deployed to the RAM704, and the main control unit 701 executes the deployed basic operation program, thereby configuring the basic operation execution unit 7101. The cooperation control program 7002 stored in the storage unit 710 is similarly disposed in the RAM704, and the main control unit 701 executes the disposed cooperation control program, thereby configuring the cooperation control execution unit 7102. The RAM704 also includes a temporary storage area for temporarily holding data generated when each operation program is executed, as necessary.

In the following, for the sake of simplifying the description, the processing of the main control unit 701 for controlling each operation module by disposing and executing the basic operation program 7001 stored in the ROM703 in the RAM704 will be described as the basic operation execution unit 7101 for controlling each operation module. The same is described with respect to other operational procedures.

The cooperation control executing unit 7102 manages device authentication and connection, transmission and reception of each data, and the like when the portable information terminal 700 performs cooperation with the television receiver. The cooperation control executing unit 7102 includes a browser engine function for executing an application cooperating with the television receiver.

Each of the above-described operation programs may be stored in the ROM703 and/or the storage unit 710 in advance when the product leaves the factory. The product may be obtained from a server device on the internet 800 after shipment through the LAN communication unit 721 or the mobile phone network communication unit 722. The respective operation programs stored in the memory card, the optical disk, or the like may be acquired through the expansion interface unit 724 or the like.

[ broadcast wave of digital broadcast ]

Here, an example of a broadcast wave of a digital broadcast received by the broadcast receiving apparatus according to the embodiment of the present invention will be described.

The broadcast receiving apparatus 100 can receive a terrestrial digital broadcast service in which at least a part of the specifications are common to the ISDB-T (Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting: terrestrial television digital broadcast integrated service digital broadcasting) scheme. Specifically, the polarized digital terrestrial broadcasting and the single-polarized digital terrestrial broadcasting that can be received by the second modem 130T are advanced digital terrestrial broadcasting that are partially common to ISDB-T systems. The layer-division multiplexing terrestrial digital broadcasting that can be received by the third modem 130L is an advanced terrestrial digital broadcasting that is partially common to ISDB-T systems. The current terrestrial digital broadcast that the first modem 130C can receive is an ISDB-T terrestrial digital broadcast. The advanced BS digital broadcast and the advanced CS digital broadcast that the fourth modem 130B can receive are digital broadcasts different from ISDB-T systems.

Here, the polarized digital terrestrial broadcasting and the single polarized digital terrestrial broadcasting of the present embodiment use OFDM (Orthogonal Frequency Division Multiplexing: orthogonal frequency division multiplexing) which is one of the multi-carrier systems as a transmission system, similarly to the ISDB-T system. Since OFDM is a multi-carrier scheme, it is effective to add a redundant part in the time axis direction called a guard interval because the symbol length is long, and the influence of multipath in the guard interval can be reduced. Therefore, SFN (Single Frequency Network: single frequency network) can be realized, and frequency can be effectively utilized.

Like ISDB-T scheme, the polarized dual-purpose terrestrial digital broadcast, the single-polarized terrestrial digital broadcast, and the layer multiplexing terrestrial digital broadcast according to the present embodiment divide OFDM carriers into groups called segments, and one channel bandwidth of the digital broadcast service is composed of 13 segments as shown in fig. 4A. The center of the band is set as the position of segment 0, and segment numbers (0 to 12) are sequentially assigned to the center. The channel coding of the polarized wave dual-purpose terrestrial digital broadcasting and the single polarized wave terrestrial digital broadcasting of the present embodiment and the layer division multiplexing terrestrial digital broadcasting is performed in units of OFDM segments. It is thus possible to define a hierarchical transmission, for example, in the bandwidth of 1 television channel, a part of the OFDM segments can be allocated to the fixed reception service and the rest to the mobile reception service, respectively. In hierarchical transmission, each layer is composed of 1 or more OFDM segments, and parameters such as a carrier modulation scheme, an inner coding rate, and a time interleaving length can be set for each layer. The number of layers may be arbitrarily set, for example, a maximum of 3 layers. Fig. 4B shows an example of layering of OFDM segments in the case where the number of layers is 3 or 2. In the example of fig. 4B (1), the number of layers is 3, the layer a is made up of 1 segment (segment 0), the layer B is made up of 7 segments (segments 1 to 7), and the layer C is made up of 5 segments (segments 8 to 12). In the example of fig. 4B (2), the number of layers is 3, the a layer is made up of 1 segment (segment 0), the B layer is made up of 5 segments (segments 1 to 5), and the C layer is made up of 7 segments (segments 6 to 12). In the example of fig. 4B (3), the number of layers is 2, the a layer is made up of 1 segment (segment 0), and the B layer is made up of 12 segments (segments 1 to 12). The number of OFDM segments, channel coding parameters, and the like of each layer are determined according to the grouping information, and TMCC signal transmission is performed using control information for supporting the operation of the receiver.

As an example of the use of the segment hierarchy of (1), (2) and (3) in fig. 4B, the following can be given.

For example, the layering of (1) in fig. 4B can be used in the polarized wave dual-purpose terrestrial digital broadcasting of the present embodiment, and the same segment layering may be used for the horizontally polarized wave and the vertically polarized wave. Specifically, the above-mentioned 1-segment transmission of the horizontal polarized wave for the a-layer is only required for the mobile reception service of the existing terrestrial digital broadcasting. In addition, the 7-segment transmission current terrestrial digital broadcasting serving as the B-layer horizontal polarized wave, that is, the terrestrial digital broadcasting serving for transmitting an image having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically may be used. (in this case, the same service may be used for the above 7-segment transmission of a vertically polarized wave, and the above 5-segment transmission and the total 10-segment transmission of both horizontally polarized wave and vertically polarized wave may be used as the layer C, so that an advanced terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels in horizontal direction and 1080 pixels in vertical direction may be used. Details about this transmission are described later. The layered transmission wave can be received by the second modem 130T of the broadcast receiving apparatus 100, for example.

The layering of (1) in fig. 4B can be used for the single polarization terrestrial digital broadcasting in the present embodiment. Specifically, the layer a may be a mobile reception service for transmitting the existing terrestrial digital broadcast by using the above-mentioned 1-segment. In addition, as the B layer, the 7-segment terrestrial digital broadcasting service is used to transmit an image having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically. Further, the layer C may be an advanced terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically by using the above-mentioned 5-segment transmission. In this case, the layer C uses a carrier modulation scheme, an error correction coding scheme, a video coding scheme, and the like, which are more efficient than those of the conventional terrestrial digital broadcasting. Details about this transmission are described later. The layered transmission wave can be received by the second modem 130T of the broadcast receiving apparatus 100, for example.

In addition, as an example not shown, the single polarization terrestrial digital broadcasting of the present embodiment may be configured to be a mobile receiving service for transmitting an existing terrestrial digital broadcasting by 1 segment of the a layer, i.e., a terrestrial digital broadcasting service for transmitting an image having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically by 8 segments of the B layer, and an advanced terrestrial digital broadcasting service for transmitting an image having a maximum resolution of 1920 pixels horizontally×1080 pixels vertically by 4 segments of the C layer. In this case, the layer C uses a carrier modulation scheme, an error correction coding scheme, a video coding scheme, and the like, which are more efficient than those of the conventional terrestrial digital broadcasting. Details about this transmission are described later. The layered transmission wave can be received by the second modem 130T of the broadcast receiving apparatus 100, for example.

For example, the layering of (2) in fig. 4B may be used as an example different from (1) in fig. 4B in the polarized wave dual-purpose terrestrial digital broadcasting of the present embodiment, and the same segment layering may be used for the horizontally polarized wave and the vertically polarized wave. Specifically, the above-mentioned 1-segment transmission of the horizontal polarized wave for the a-layer is only required for the mobile reception service of the existing terrestrial digital broadcasting. (in this case, the mobile receiving service of the conventional terrestrial digital broadcasting may be the same service by the 1-segment transmission of the vertical polarized wave, and in addition, the service may be regarded as a layer a.) further, the layer B may be constituted as an advanced terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically by the 5-segment transmission and 10-segment transmission of both the horizontal polarized wave and the vertical polarized wave. In addition, as the layer C, the 7-segment transmission of the horizontal polarized wave is sufficient to transmit the terrestrial digital broadcasting service of the current terrestrial digital broadcasting, that is, transmitting an image with the maximum resolution of 1920 pixels horizontally×1080 pixels vertically. (in this case, the same service can be transmitted by the above 7 segments of vertically polarized waves, and this is also referred to as a layer C.) the details of this transmission will be described later. The transmission wave of the segment hierarchy can be received by the second modem 130T of the broadcast receiving apparatus 100 of the present embodiment, for example.

The layering of fig. 4B (2) can be used as an example different from fig. 4B (1) in the single polarization terrestrial digital broadcasting of the present embodiment. Specifically, the layer a may be a mobile reception service for transmitting the existing terrestrial digital broadcast by using the above-mentioned 1-segment. Further, the B layer may be an advanced terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically by using the 5-segment transmission. In this case, the layer B uses a carrier modulation scheme, an error correction coding scheme, a video coding scheme, and the like, which are more efficient than those of the conventional terrestrial digital broadcasting. As the layer C, the 7-segment terrestrial digital broadcasting service is used to transmit an image of the maximum resolution of 1920 pixels horizontally and 1080 pixels vertically. Details about this transmission are described later. The transmission wave of the segment hierarchy can be received by the second modem 130T of the broadcast receiving apparatus 100 of the present embodiment, for example.

For example, the layering of (3) of fig. 4B can be used in the layer division multiplexing terrestrial digital broadcasting and the existing terrestrial digital broadcasting of the present embodiment. Specifically, when used in layer multiplexing terrestrial digital broadcasting, the mobile reception service of the existing terrestrial digital broadcasting may be transmitted as 1 segment in the layer a diagram. Further, the B layer may be configured as an advanced terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically by 12 pieces of transmission in the figure, and an existing terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of 1920 pixels horizontally x 1080 pixels vertically. The transmission wave of the segment hierarchy can be received by the third modem 130L of the broadcast receiving apparatus 100 of the present embodiment, for example. When used in the existing terrestrial digital broadcasting, the mobile receiving service of the existing terrestrial digital broadcasting may be transmitted as 1 segment in the layer a diagram, and the terrestrial digital broadcasting service of the existing terrestrial digital broadcasting may be transmitted as 12 segments in the layer B diagram, that is, transmitting an image with a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically. The transmission wave of the segment hierarchy can be received by the first modem 130C of the broadcast receiving apparatus 100 of the present embodiment, for example.

Fig. 4C shows an example of a system on the broadcast station side that realizes the generation processing of OFDM transmission waves, which are digital broadcast waves of the polarized digital terrestrial broadcasting, the single polarized digital terrestrial broadcasting, and the layer multiplexing digital terrestrial broadcasting of the present embodiment. The information source encoding unit 411 encodes video, audio, various data, and the like. The multiplexing unit/conditional access processing unit 415 multiplexes the video/audio/various data and the like encoded by the information source encoding unit 411, and appropriately performs processing corresponding to conditional access and outputs the multiplexed data as a packet stream. The source encoding unit 411 and the multiplexing unit/conditional access processing unit 415 can be provided in plural in parallel to generate plural packet streams. The channel coding unit 416 multiplexes the plurality of packet streams again to form 1 packet stream, and performs channel coding processing to output the multiplexed packet stream as an OFDM transmission wave. The configuration shown in fig. 4C is common to the ISDB-T scheme as a configuration for realizing the generation process of the OFDM transmission wave, although the details of the information source coding and the channel coding are different. Therefore, in the plurality of information source encoding units 411 and the multiplexing unit/conditional access processing unit 415, a part of the information source encoding units may be configured for ISDB-T terrestrial digital broadcasting services, and a part of the information source encoding units may be configured for advanced terrestrial digital broadcasting services, and the channel encoding unit 416 may be configured to multiplex packet streams of a plurality of different terrestrial digital broadcasting services. When the multiplexing unit/conditional access processing unit 415 is configured for ISDB-T terrestrial digital broadcasting service, it is sufficient to generate an MPEG-2TS, which is a stream of a TSP (Transport Stream Packet: transport stream packet) defined in the MPEG-2 system. In the case where the multiplexing unit/conditional access processing unit 415 is configured for advanced terrestrial digital broadcasting service, it is sufficient to generate an MMT packet stream, a TLV stream including an MMT packet, or a stream of TSPs specified in another system. Of course, the plurality of source encoding units 411 and the multiplexing unit/conditional access processing unit 415 may all be configured for advanced terrestrial digital broadcasting services, and all of the packet streams multiplexed by the channel encoding unit 416 may be configured for advanced terrestrial digital broadcasting services.

Fig. 4D shows an example of the configuration of the channel coding section 416.

First, fig. 4D (1) is explained. Fig. 4D (1) shows a configuration of the channel coding unit 416 in the case of generating only OFDM transmission waves of digital broadcasting of the existing terrestrial digital broadcasting service. The OFDM transmission wave transmitted by the present structure has, for example, the segment structure of (3) of fig. 4B. The packet stream input from the multiplexing section/conditional reception processing section 415 and subjected to the re-multiplexing process is subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving, with redundancy of error correction added thereto. Then, the pilot signal, the TMCC signal, and the AC signal are subjected to IFFT (Inverse Fast Fourier Transform: inverse fast fourier transform) processing, and subjected to orthogonal modulation after a guard interval is added, to thereby form an OFDM transmission wave. The outer encoding process, the power spreading process, the byte interleaving process, the inner encoding process, the bit interleaving process, and the mapping process are configured to be capable of processing each of the layers such as the a layer and the B layer. (in addition, since the existing digital broadcasting of the terrestrial digital broadcasting service is 2 layers in application but can transmit a maximum of 3 layers, an example of 3 layers is shown in (1) of fig. 4D.) the mapping process is a modulation process of a carrier wave. The packet stream input from the multiplexing unit/conditional access processing unit 415 may be multiplexed with information such as TMCC information, mode, or guard interval ratio. The packet stream input to the channel encoder 416 may be a stream of a TSP defined in the MPEG-2 system, as described above. The OFDM transmission wave generated by the configuration of fig. 4D (1) can be received by the first modem 130C of the broadcast receiving apparatus 100 of the present embodiment, for example.

Next, fig. 4D (2) will be described. Fig. 4D (2) shows a configuration of the channel coding unit 416 in the case of generating an OFDM transmission wave of the polarized digital terrestrial broadcasting according to the present embodiment. The OFDM transmission wave transmitted by the present structure has, for example, the segment structure of (1) or (2) of fig. 4B. In fig. 4D (2), the packet stream input from the multiplexing section/conditional access processing section 415 and subjected to the re-multiplexing process is also subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving, while adding redundancy for error correction. Then, the pilot signal, TMCC signal, and AC signal are subjected to IFFT processing, guard interval addition processing, and orthogonal modulation to form an OFDM transmission wave.

In the configuration example of fig. 4D (2), outer encoding processing, power diffusion processing, byte interleaving, inner encoding processing, bit interleaving processing, mapping processing, and time interleaving are configured to be able to process each of the layers a, B, C, and the like. However, in the configuration example of fig. 4D (2), not only the OFDM transmission wave of the horizontal polarization (H) but also the OFDM transmission wave of the vertical polarization (V) are generated, and the processing flow is branched into 2 systems. When branching from the processing system of the horizontally polarized wave (H) to the processing system of the vertically polarized wave (V), whether the same data as the processing system of the horizontally polarized wave (H) is branched to the processing system of the vertically polarized wave (V), whether the data different from the processing system of the horizontally polarized wave (H) is branched to the processing system of the vertically polarized wave (V), or whether the data is not branched to the processing system of the vertically polarized wave (V) can be different for each layer according to the segment structure described in (1) or (2) of fig. 4B.

The processing such as outer encoding, inner encoding, and mapping shown in the configuration of fig. 4D (2) can use more advanced processing not adopted in the respective processing of the configuration of fig. 4D (1) in addition to the processing having compatibility with the configuration of fig. 4D (1). Specifically, in the configuration of fig. 4D (2), regarding the portion to be processed for each layer, processing compatible with the configuration of fig. 4D (1) is performed for processing such as outer coding, inner coding, and mapping in the layer of the current terrestrial digital broadcasting service transmitting the current terrestrial digital broadcasting mobile reception service and the current terrestrial digital broadcasting service transmitting the video with the maximum resolution of 1920 pixels horizontally×1080 pixels vertically. In contrast, in the configuration of fig. 4D (2), regarding the portion to be processed for each layer, for a layer of an advanced terrestrial digital broadcasting service capable of transmitting an image with a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically, processing such as outer coding, inner coding, and mapping may be configured to be more advanced than that which is not adopted in the respective processing using the configuration of fig. 4D (1).

In addition, in the polarized dual-purpose terrestrial digital broadcasting according to the present embodiment, since the layer and the distribution of the terrestrial digital broadcasting service to be transmitted can be switched using TMCC information described later, it is preferable to configure such that the processing such as outer coding, inner coding, mapping and the like to be performed on each layer can be switched using TMCC information.

In addition, with respect to a layer of an advanced terrestrial digital broadcasting service capable of transmitting an image with a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically, byte interleaving, bit interleaving, and time interleaving can be performed in a compatible process with the existing terrestrial digital broadcasting service, or can be further advanced and different processes. Or a part of interleaving may be omitted with respect to a layer transmitting an advanced terrestrial digital broadcasting service.

In the configuration of fig. 4D (2), the input stream of the layer of the mobile reception service for transmitting the active terrestrial digital broadcasting and the active terrestrial digital broadcasting service for transmitting the video with the maximum resolution of 1920 pixels horizontally×1080 pixels vertically may be a stream of TSPs specified in the MPEG-2 system used in the active terrestrial digital broadcasting, among the packet streams input to the channel coding unit 416. The input stream of the layer of the structure of (2) of fig. 4D, which is a source of the layer transmitting the advanced terrestrial digital broadcasting service, may be a stream specified in a system other than the TSP specified in the MPEG-2 system, such as an MMT packet stream or TLV including an MMT packet, among the packet streams input to the channel coding section 416. However, a TSP stream specified in the MPEG-2 system may also be employed in an advanced terrestrial digital broadcasting service.

In the configuration of fig. 4D (2) described above, the stream format and processing compatible with the existing terrestrial digital broadcasting are maintained in the layer of the mobile reception service transmitting the existing terrestrial digital broadcasting and the existing terrestrial digital broadcasting service transmitting the video with the maximum resolution of 1920 pixels horizontally×1080 pixels vertically, from the input stream until the OFDM transmission wave is generated. Thus, when the existing reception device for the terrestrial digital broadcasting service receives one of the OFDM transmission wave of the horizontal polarization and the OFDM transmission wave of the vertical polarization generated by the configuration of (2) of fig. 4D, it is possible to correctly receive and demodulate the broadcast signal of the terrestrial digital broadcasting service even for the mobile reception service transmitting the terrestrial digital broadcasting service and the layer of the terrestrial digital broadcasting service transmitting the video with the maximum resolution of 1920 pixels horizontally and 1080 pixels vertically.

In addition, in the configuration of (2) of fig. 4D, in a layer of a segment of both the OFDM transmission wave using the horizontally polarized wave and the OFDM transmission wave using the vertically polarized wave, an advanced terrestrial digital broadcasting service capable of transmitting an image with a pixel number exceeding the horizontal 1920 pixels×the vertical 1080 pixels as the maximum resolution, whose broadcast signal can be received and demodulated by the broadcast receiving apparatus 100 of the embodiment of the present invention, can be transmitted.

That is, with the configuration of (2) of fig. 4D, it is possible to generate digital broadcast waves that can properly receive and demodulate digital broadcasts in both a broadcast receiving apparatus supporting an advanced terrestrial digital broadcast service and an existing receiving apparatus for an existing terrestrial digital broadcast service.

In the case of generating an OFDM transmission wave of the single polarization terrestrial digital broadcast according to the present embodiment, the channel coding section 416 shown in fig. 4D (2) may be configured by either one of a system for generating an OFDM transmission wave of a horizontal polarization (H) and a system for generating an OFDM transmission wave of a vertical polarization (V). In this case, the OFDM transmission wave transmitted by the present configuration also has the segment configuration of (1) or (2) of fig. 4B, for example, but unlike the case of generating the OFDM transmission wave of the above-described polarized digital terrestrial broadcast, only either one of the OFDM transmission wave of the horizontal polarized wave and the OFDM transmission wave of the vertical polarized wave is transmitted. Other structures and operations are the same as those of the case of generating the OFDM transmission wave of the above-described polarized terrestrial digital broadcasting.

Next, fig. 4D (3) will be described. Fig. 4D (3) shows a configuration of the channel coding unit 416 in the case of generating an OFDM transmission wave of the layer division multiplexing terrestrial digital broadcasting according to the present embodiment. In fig. 4D (3), the packet stream input from the multiplexing section/conditional access processing section 415 and subjected to the re-multiplexing process is also subjected to various interleaving processes such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving, while adding redundancy for error correction. Then, the signal is subjected to IFFT processing together with a pilot signal, a TMCC signal, and an AC signal, and subjected to orthogonal modulation after a guard interval is added to the signal to form an OFDM transmission wave.

However, in the configuration of fig. 4D (3), after the modulated wave transmitted by the upper layer and the modulated wave transmitted by the lower layer are generated and multiplexed, the digital broadcast wave, that is, the OFDM transmission wave is generated. The processing system shown on the upper side of the configuration of fig. 4D (3) is a processing system for generating a modulated wave for transmission by the upper layer, and the processing system shown on the lower side is a processing system for generating a modulated wave for transmission by the lower layer. The data transmitted in the processing system for generating a modulated wave for upper layer transmission in fig. 4D (3) is a mobile reception service of an existing terrestrial digital broadcast and an existing terrestrial digital broadcast service for transmitting an image with a maximum resolution of 1920 pixels horizontally×1080 pixels vertically, and the various processes in the processing system for generating a modulated wave for upper layer transmission in fig. 4D (3) are the same as or compatible with the various processes in fig. 4D (1). The modulated wave transmitted by the upper layer in fig. 4D (3) has the segment structure in fig. 4B (3) similarly to the transmitted wave in fig. 4D (1), for example. Therefore, the modulated wave transmitted by the upper layer in fig. 4D (3) is a digital broadcast wave compatible with the existing terrestrial digital broadcast service for mobile reception and transmission of images having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically. In contrast, the data transmitted in the processing system for generating modulated waves for lower layer transmission in fig. 4D (3) is an advanced terrestrial digital broadcasting service capable of transmitting video images having a maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically, and for example, it is sufficient to configure more advanced processing not adopted in each processing using the configuration of fig. 4D (1) for processing such as outer coding, inner coding, and mapping.

The modulated wave transmitted by the lower layer in (3) of fig. 4D can be distributed as an a layer to an advanced terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically, for example, all 13 segments. Alternatively, the mobile receiving service of the conventional terrestrial digital broadcasting may be transmitted by the a layer of 1 segment by the segment structure of (3) of fig. 4B, or the advanced terrestrial digital broadcasting service may be transmitted by the B layer of 12 segments by the image having the maximum resolution of more than 1920 pixels horizontally x 1080 pixels vertically. In the latter case, the processing may be switched for each layer, such as the a layer and the B layer, from the outer coding processing to the time interleaving processing, as in (2) of fig. 4D. In the layer for transmitting the mobile reception service of the existing terrestrial digital broadcasting, it is necessary to maintain the compatibility with the existing terrestrial digital broadcasting, as in the description of fig. 4D (2).

In the configuration of fig. 4D (3), an OFDM transmission wave, which is a terrestrial digital broadcast wave obtained by multiplexing a modulated wave transmitted by an upper layer and a modulated wave transmitted by a lower layer, is generated. The technology of separating the modulated wave transmitted by the upper layer from the OFDM transmission wave is also carried in the existing receiving apparatus of the terrestrial digital broadcasting service, so that the mobile receiving service of the terrestrial digital broadcasting service included in the modulated wave transmitted by the upper layer and the broadcasting signal of the terrestrial digital broadcasting service transmitting the image with the maximum resolution of 1920 pixels horizontally and 1080 pixels vertically can be correctly received and demodulated by the existing receiving apparatus of the terrestrial digital broadcasting service. In contrast, a broadcast signal of an advanced terrestrial digital broadcasting service, which is included in a modulated wave transmitted in a lower layer and is capable of transmitting an image having a maximum resolution of more than 1920 pixels horizontally×1080 pixels vertically, can be received and demodulated by the broadcast receiving apparatus 100 according to the embodiment of the present invention.

That is, with the configuration of (3) of fig. 4D, it is possible to generate a digital broadcast wave that can properly receive and demodulate digital broadcasts in both a broadcast receiving apparatus supporting an advanced terrestrial digital broadcast service and an existing receiving apparatus for an existing terrestrial digital broadcast service. In addition, unlike the configuration of fig. 4D (2), the configuration of fig. 4D (3) does not require the use of multiple types of polarized waves, and OFDM transmission waves that can be received more easily can be generated.

In the OFDM transmission wave generation processing of fig. 4D (1), 4D (2), and 4D (3), three modes with different carrier numbers are prepared in consideration of the adaptability to the inter-station distance of SFN, the tolerance to doppler shift in mobile reception, and the like. In addition, another mode having a different number of carriers may be further prepared. The effective symbol length becomes longer in the mode with a large number of carriers, and if the guard interval ratio (guard interval length/effective symbol length) is the same, the guard interval length becomes longer, and the guard interval can be made resistant to multipath with a long delay time difference. On the other hand, in the case of the mode in which the number of carriers is small, the carrier interval becomes wider, and the influence of the inter-carrier interference due to the doppler shift occurring in the case of mobile reception or the like can be made less likely to occur.

In the OFDM transmission wave generation processing of fig. 4D (1), 4D (2), and 4D (3) of the present embodiment, parameters such as a carrier modulation scheme, an inner coding rate, and a time interleaving length can be set for each layer composed of 1 or more OFDM segments. Fig. 4E shows an example of transmission parameters of the system of the present embodiment in 1 segment unit of the pattern-recognized OFDM segment. The carrier modulation scheme in the figure refers to a modulation scheme of a "data" carrier. The SP signal, CP signal, TMCC signal, and AC signal are modulated by a modulation scheme different from the modulation scheme of the "data" carrier. These signals are signals that are more important for noise tolerance than the information amount, and therefore, a modulation scheme is used in which a constellation (BPSK or DBPSK, i.e., 2 states) having fewer states than the modulation scheme of the "data" carrier (i.e., QPSK or more, i.e., 4 states or more) is mapped, thereby improving noise tolerance.

Among the values of the carrier numbers, the value on the left of the diagonal line is a value when QPSK, 16QAM, 64QAM, or the like is set as the carrier modulation scheme, and the value on the right of the diagonal line is a value when DQPSK is set as the carrier modulation scheme. In the figure, the underlined parameters are parameters that are not compatible with the existing terrestrial digital broadcasting mobile reception service. Specifically, 256QAM, 1024QAM, and 4096QAM, which are modulation schemes of the "data" carrier, are not used in the existing terrestrial digital broadcasting service. Accordingly, 256QAM, 1024QAM, and 4096QAM, which are modulation schemes of "data" carriers, are not used in the processing in the layer requiring compatibility with the existing terrestrial digital broadcasting service in the OFDM broadcast wave generation processing of (1) of fig. 4D, (2) of fig. 4D, and (3) of fig. 4D of the present embodiment. As for the "data" carrier transmitted by the layer supporting the advanced terrestrial digital broadcasting service, in addition to the modulation schemes such as QPSK (state number 4), 16QAM (state number 16), 64QAM (state number 64) and the like which have compatibility with the existing terrestrial digital broadcasting service, modulation schemes of more values such as 256QAM (state number 256), 1024QAM (state number 1024) or 4096QAM (state number 4096) can be applied. In addition, a modulation scheme different from these modulation schemes may be employed.

The modulation scheme of the pilot symbol (SP or CP) carrier may be BPSK (state number 2) compatible with the existing terrestrial digital broadcasting service. The modulation scheme of the AC carrier and the TMCC carrier may use DBPSK (state number 2) compatible with the existing terrestrial digital broadcasting service.

In addition, as a mode of the intra-coding process, LDPC coding is not adopted in the existing terrestrial digital broadcasting service. Accordingly, LDPC encoding is not used in the processing in the layer requiring compatibility with the existing terrestrial digital broadcasting service in the OFDM broadcast wave generation processing of fig. 4D (1), 4D (2) and 4D (3) of the present embodiment. For data transmitted with a layer supporting advanced terrestrial digital broadcasting services, LDPC coding may be applied as inner coding. In addition, BCH coding is not used in the existing terrestrial digital broadcasting service as a method of outer coding processing. Accordingly, BCH encoding is not used in the processing in the layer requiring compatibility with the existing terrestrial digital broadcasting service in the OFDM broadcast wave generation processing of fig. 4D (1), 4D (2), and 4D (3) of the present embodiment. BCH encoding may be applied as outer encoding for data transmitted with a layer supporting advanced terrestrial digital broadcasting services.

Fig. 4F shows an example of transmission signal parameters of 1 physical channel (6 MHz bandwidth) unit in the OFDM broadcast wave generation process of fig. 4D (1), fig. 4D (2), and fig. 4D (3) according to the present embodiment. In the OFDM broadcast wave generation processing of fig. 4D (1), 4D (2) and 4D (3) of the present embodiment, basically, parameters having compatibility with the existing terrestrial digital broadcast service are adopted as parameters of fig. 4F in principle for compatibility with the existing terrestrial digital broadcast service. However, in the case where all segments are allocated to the advanced terrestrial digital broadcasting service in the modulated wave transmitted by the lower layer in (3) of fig. 4D, it is not necessary to maintain compatibility with the existing terrestrial digital broadcasting service in the modulated wave. In this case, therefore, parameters other than those shown in fig. 4F may be used for the modulated wave transmitted by the lower layer in fig. 4D (3).

Next, a carrier wave of the OFDM transmission wave of the present embodiment will be described. The carrier wave of the OFDM transmission wave of the present embodiment includes a carrier wave for transmitting data such as video and audio, a carrier wave for transmitting pilot signals (SP, CP, AC1, AC 2) as reference for demodulation, and a carrier wave for transmitting TMCC signals as information such as modulation format and convolutional coding rate of the carrier wave. For these transmissions, a number of carriers corresponding to 1/9 of the number of carriers per segment is used. In addition, concatenated coding is used for error correction, shortened reed-solomon (204, 188) coding is used for outer coding, and punctured convolutional coding with constraint length 7 and code rate 1/2 as parent codes is used for inner coding. The outer code and the inner code may be different codes from those described above. The information rate varies depending on parameters such as the carrier modulation format, convolutional coding rate, guard interval ratio, and the like.

In addition, 204 symbols are taken as 1 frame, and an integer number of TSPs are included in 1 frame. Switching of transmission parameters is performed at the boundary of the frame.

The Pilot signal as a reference for demodulation includes SP (Scattered Pilot), CP (continuous Pilot), AC (Auxiliary Channel: auxiliary channel) 1, and AC2. Fig. 4G shows an example of a schematic diagram of the arrangement of pilot signals and the like in a segment in the case of synchronous modulation (QPSK, 16QAM, 64QAM, 256QAM, 1024QAM, 4096QAM, and the like). The SPs are inserted into the segments of synchronous modulation, 1 time per 12 carriers in the carrier number (frequency axis) direction, and 1 time per 4 symbols in the OFDM symbol number (time axis) direction. Since the amplitude and phase of the SP are known, they can be used as a reference for synchronous demodulation. Fig. 4H shows an example of a schematic arrangement of pilot signals and the like in a segment in the case of differential modulation (DQPSK and the like). CP is a continuous signal inserted into the left end of a differentially modulated segment for demodulation.

AC1 and AC2 load information on the CP and are also used to transmit information for the broadcast operator in addition to the pilot signal. But may also be used to transmit other information.

In addition, the configuration diagrams shown in fig. 4G and 4H are examples of the case of mode 3, carrier numbers are 0 to 431, and in the case of mode 1 and mode 2, are 0 to 107 or 0 to 215, respectively. In addition, carriers for transmitting AC1 and AC2 and TMCC may be decided in advance for each segment. In addition, the carriers of AC1 and AC2 and TMCC are transmitted and are randomly arranged in the frequency direction in order to mitigate the influence of the periodic degradation of channel characteristics caused by multipath.

[ TMCC Signal ]

Information (TMCC information) about demodulation operations of the receiver, such as a TMCC signal transmission layer structure and transmission parameters of the OFDM segment. The TMCC signal is transmitted using a carrier for TMCC transmission defined in each segment. Fig. 5A shows an example of bit allocation of TMCC carriers. The TMCC carrier is composed of 204 bits (B0 to B203). B0 is a demodulation reference signal for TMCC symbols, and has a predetermined amplitude and phase reference. B1 to B16 are synchronization signals and each consist of a 16-bit word. For the synchronization signal, two kinds of w0 and w1 are prescribed, and w0 and w1 are alternately transmitted for each frame. B17-B19 are used for identifying the segment format and identifying whether each segment is a differential modulation unit or a synchronous modulation unit. B20 to B121 record TMCC information. B122 to B203 are parity bits.

The TMCC information of the OFDM transmission wave of the present embodiment may be configured to include, for example, a system identifier, a transmission parameter switching index, a start control signal (an emergency alert broadcasting start flag), current information, subsequent information, a frequency conversion process identifier, a physical channel number identifier, a main signal identifier, a 4K signal transmission layer identifier, an additional hierarchical transmission identifier, and the like, and information for supporting demodulation and decoding operations of the receiver. The current information indicates the current layer structure and transmission parameters, and the subsequent information indicates the switched layer structure and transmission parameters. The switching of the transmission parameters is performed in frame units. Fig. 5B shows an example of bit allocation of TMCC information. Fig. 5C shows an example of the structure of transmission parameter information included in the current information and the subsequent information. The link transmission phase correction amount is control information used in the case of the terrestrial digital audio broadcasting ISDB-TSB (ISDB for Terrestrial Sound Broadcasting: terrestrial digital audio broadcasting expert group) or the like, which is common to the transmission system, and a detailed description thereof is omitted here.

Fig. 5D shows an example of bit allocation of the system identifier. A signal for a system identifier is allocated 2 bits. In the case of the existing terrestrial digital television broadcasting system, "00" is set. In the case of a terrestrial digital audio broadcasting system in which transmission systems are common, "01" is set. In addition, "10" is set in the case of the advanced terrestrial digital television broadcasting system such as the polarized wave dual-purpose terrestrial digital broadcasting, the single polarized wave terrestrial digital broadcasting, or the layer multiplexing terrestrial digital broadcasting of the present embodiment. In an advanced terrestrial digital television broadcasting system, by transmitting broadcast waves by a polarized wave dual-purpose transmission system or a single polarized wave terrestrial digital broadcasting or a layer division multiplexing system, a 2K broadcast program (broadcast program of images of horizontal 1920 pixels×vertical 1080 pixels, or broadcast program of images of resolution below) and a 4K broadcast program (broadcast program of images exceeding horizontal 1920 pixels×vertical 1080 pixels, not limited to broadcast program of images of horizontal 3840 pixels×vertical 2160 pixels) can be transmitted simultaneously within the same service.

The transmission parameter switching index is used to notify the receiver of the switching timing by counting down in the case of switching the transmission parameter. The index is typically a value of "1111", which in the case of switching transmission parameters is decremented by 1 every frame from 15 frames before the switch. The switch timing is synchronized with the next frame to send "0000". The value of the index returns to "1111" after "0000". The countdown is performed when any one or more of the parameters including the system identifier of the TMCC information and the transmission parameter information and the frequency conversion processing identifier included in the current information/subsequent information, and the primary signal identifier and the 4K signal transmission layer identifier and the additional hierarchical transmission identifier shown in fig. 5B are switched. The countdown is not performed in the case of switching only the start control signal of the TMCC information.

The start control signal (start flag for emergency alert broadcast) is set to "1" when the start control of the receiver is performed in the emergency alert broadcast, and is set to "0" when the start control is not performed.

The partial reception flag of each of the current information and the subsequent information is set to "1" when the segment in the center of the transmission band is set to partial reception, and is set to "0" when it is not. In the case where the set segment 0 is used for partial reception, this layer is defined as a layer a. If there is no subsequent information, the partial reception flag is set to "1".

Fig. 5E shows an example of bit allocation of the carrier modulation mapping scheme (modulation scheme of the data carrier) among the transmission parameters of each layer of the current information and the subsequent information. When the parameter is "000", the modulation scheme is DQPSK. When "001", the modulation scheme is QPSK. If "010", the modulation scheme is 16QAM. If "011", the modulation scheme is 64QAM. If "100", the modulation scheme is 256QAM. If "101", the modulation scheme is 1024QAM. If "110", the modulation scheme is 4096QAM. If the layer is not used or if there is no subsequent information, the parameter is set to "111".

The coding rate, the time interleaving length, and the like may be set so that each parameter is set in accordance with the grouping information of each layer of the current information and the subsequent information. The number of segments represents the number of segments of each layer by a value of 4 bits. Is an unused layer or "1111" is set in the absence of subsequent information. In addition, since the mode, the guard interval ratio, and the like are set, and are detected independently at the receiver side, transmission may be performed without using TMCC information.

Fig. 5F shows an example of bit allocation of the frequency conversion process identifier. The frequency conversion process identifier is set to "0" when the frequency conversion process (in the case of the polarized wave dual-purpose transmission scheme) or the frequency conversion amplification process (in the case of the layer multiplexing transmission scheme) described later is performed in the conversion unit 201T or the conversion unit 201L in fig. 2A. Setting "1" in the case where the frequency conversion process and the frequency conversion amplification process are not performed. For example, the parameter may be set to "1" when transmitted from the broadcasting station, and rewritten to "0" in the conversion unit 201T or the conversion unit 201L when the frequency conversion process or the frequency conversion amplification process is performed in the conversion unit 201T or the conversion unit 201L. In this way, when the bit of the frequency conversion process identifier is "0" at the time of reception by the second modem 130T or the third modem 130L of the broadcast receiving apparatus 100, it can be recognized that the OFDM transmission wave has been subjected to the frequency conversion process or the like after being transmitted from the broadcast station.

In the polarized terrestrial digital broadcasting according to the present embodiment, the frequency conversion processing identifier bit may be set and rewritten for each of a plurality of polarized waves. For example, if both of the plurality of types of polarized waves are not frequency-converted by the conversion unit 201T of fig. 2A, the frequency conversion process identifier bit included in the OFDM transmission waves of both may be kept at "1". If only one of the plurality of types of polarized waves is frequency-converted by the polarized wave conversion unit 201T, the frequency conversion process identifier bit included in the OFDM transmission wave of the polarized wave subjected to the frequency conversion may be rewritten to "0" by the conversion unit 201T. If both of the plural types of polarized waves are frequency-converted by the conversion unit 201T, the frequency conversion process identifier bit included in the OFDM transmission wave of the polarized wave of both of the frequency-converted polarized waves may be rewritten to "0" by the conversion unit 201T. In this way, the broadcast receiving apparatus 100 can recognize whether or not frequency conversion has been performed for each of the plurality of types of polarized waves.

In addition, since the frequency conversion process identifier bit is not defined in the existing terrestrial digital broadcasting, it is ignored in the terrestrial digital broadcasting receiving apparatus that the user has already used. However, this bit may be used in a new terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically, which is an improvement of the existing terrestrial digital broadcasting. In this case, the first modem 130C of the broadcast receiving apparatus 100 according to the embodiment of the present invention may be configured as the first modem 130C supporting the new terrestrial digital broadcast service.

As a modification, the frequency conversion process or the frequency conversion amplification process may be performed on the OFDM transmission wave by the conversion unit 201T or the conversion unit 201L in fig. 2A, and may be set to "0" in advance at the time of transmission from the broadcasting station. In the case where the received broadcast wave is not an advanced terrestrial digital broadcast service, the parameter may be set to "1".

Fig. 5G shows an example of bit allocation of the physical channel number identifier. The physical channel number identifier is formed of a 6-bit code, and identifies the physical channel number (13 to 52 ch) of the received broadcast wave. In the case where the received broadcast wave is not an advanced terrestrial digital broadcast service, the parameter is set to "111111". The bits of the physical channel number identifier are not defined in the existing terrestrial digital broadcasting, and the physical channel number of the broadcast wave designated by the broadcasting station cannot be acquired from the TMCC signal, the AC signal, or the like in the existing terrestrial digital broadcasting receiving apparatus. In the broadcast receiving apparatus 100 according to the embodiment of the present invention, the physical channel number set by the broadcast station for the OFDM transmission wave can be known without demodulating the carrier other than the TMCC signal and the AC signal using the bits of the physical channel number identifier of the received OFDM transmission wave. The physical channels 13 to 52ch are allocated in advance in a band of 470 to 710MHz with a bandwidth of 6MHz per 1 ch. Accordingly, the broadcast receiving apparatus 100 can know the physical channel number of the OFDM transmission wave based on the bits of the physical channel number identifier, that is, can know the frequency band in which the OFDM transmission wave is transmitted over the air as the terrestrial digital broadcast wave.

In the polarized wave dual-purpose terrestrial digital broadcasting according to the present embodiment, in the generation process of the OFDM transmission wave on the broadcasting station side, the physical channel number identifier bits may be respectively arranged for a plurality of polarized waves in pairs in the bandwidth that originally constitute 1 physical channel, and the same physical number may be added. Here, depending on the installation environment of the broadcast receiving apparatus 100, there is a case where only the frequency of one of the polarized waves is converted in the conversion section 201T of fig. 2A. Accordingly, if the frequencies of the pair of the plurality of types of polarized waves at the time of reception by the broadcast receiving apparatus 100 are different from each other, if it is not known by some means that the pair of the plurality of types of polarized waves having different frequencies is originally paired, advanced terrestrial digital broadcast demodulation cannot be performed by using both of the polarized waves of the polarized wave dual-purpose terrestrial digital broadcast on the broadcast receiving apparatus side. In this case, if the physical channel number identifier bit is used, when the transmission waves whose physical channel number identifier bit is represented by the same value exist in a plurality of different frequencies in the broadcast receiving apparatus 100, the transmission waves can be recognized as transmission waves transmitted as pairs of polarized waves that originally constitute 1 physical channel on the broadcast station side. Thus, the demodulation of advanced terrestrial digital broadcasting of the polarized-wave dual-purpose terrestrial digital broadcasting can be realized using the plurality of transmission waves exhibiting the same value.

Fig. 5H shows an example of bit allocation of the primary signal identifier. In this example, the bits of the main signal identifier are arranged in the bits B117.

In the case where the transmitted OFDM transmission wave is a transmission wave of a polarized wave dual-purpose terrestrial digital broadcast, the parameter is set to "1" in TMCC information of the transmission wave transmitted with the main polarization wave. The TMCC information of the transmission wave transmitted by the sub-polarized wave is set to "0". The transmission wave transmitted by the main polarization wave means a polarized wave signal having the same polarization direction as that used in the transmission of the existing terrestrial digital broadcasting service, among the vertically polarized wave signal and the horizontally polarized wave signal. That is, in the existing terrestrial digital broadcasting service, an area transmitting with a horizontally polarized wave is used, and in the polarized wave dual-purpose terrestrial digital broadcasting service, the horizontally polarized wave is a main polarized wave, and the vertically polarized wave is a sub-polarized wave. In addition, in the existing terrestrial digital broadcasting service, an area transmitting with a vertically polarized wave is adopted, and in the polarized wave dual-purpose terrestrial digital broadcasting service, the vertically polarized wave is a main polarized wave, and the horizontally polarized wave is a sub-polarized wave.

In the broadcast receiving apparatus 100 that receives a transmission wave of the polarized digital terrestrial broadcast according to the embodiment of the present invention, by using the bit of the primary signal identifier, it is possible to identify whether the received transmission wave is transmitted with the primary polarization or with the secondary polarization at the time of transmission. For example, if the identification processing of the main polarized wave and the service polarized wave is used, it is possible to perform processing such as initial scanning of the transmission wave transmitted by the main polarized wave at the time of initial scanning, and initial scanning of the transmission wave transmitted by the sub polarized wave after the end of the initial scanning of the transmission wave transmitted by the main polarized wave.

In the case of transmitting an existing terrestrial digital broadcasting service using a layer composed of only segments included in a main polarization and transmitting an advanced terrestrial digital service using a layer composed of segments included in both the main polarization and a sub-polarization, it is possible to perform initial scanning of a transmission wave transmitted with the main polarization first, complete initial scanning of the existing terrestrial digital broadcasting service, and then perform initial scanning of a transmission wave transmitted with the sub-polarization first, and perform initial scanning of the advanced terrestrial digital broadcasting service. In this way, it is preferable that the initial scan of the advanced terrestrial digital broadcasting service can be performed after the completion of the initial scan of the existing terrestrial digital broadcasting service, and the setting of the initial scan of the existing terrestrial digital broadcasting service can be reflected to the setting of the initial scan of the advanced terrestrial digital broadcasting service.

In addition, the definition of the meaning of "1" and "0" of the bits of the main signal identifier may also be reversed from the above description.

Instead of the bits of the main signal identifier, the polarization direction identifier bits may be used as one parameter of the TMCC information. Specifically, the polarization direction identifier bit may be set to "1" on the broadcasting station side for a transmission wave transmitted by the water Ping Pianzhen wave, and may be set to "0" on the broadcasting station side for a transmission wave transmitted by the vertical polarization wave. In the broadcast receiving apparatus 100 that receives a transmission wave of the polarized digital terrestrial broadcast according to the embodiment of the present invention, it is possible to identify in which polarization direction the received transmission wave is transmitted at the time of transmission by using the polarization direction identifier bit. For example, if this polarization direction identification process is used, it is possible to perform a process such as an initial scan of a transmission wave transmitted by a water Ping Pianzhen wave, an initial scan of a transmission wave transmitted by a water Ping Pianzhen wave, and an initial scan of a transmission wave transmitted by a vertically polarized wave after the initial scan is completed. In the description of the effect of this processing, the "main polarized wave" of the portion of the bit description of the main signal identifier related to the initial scan is replaced with the "horizontal polarized wave" and the "sub polarized wave" is replaced with the "vertical polarized wave", so that the description thereof will be omitted.

In addition, the definition of the meaning of "1" and "0" of the polarization direction identifier bits may also be reversed from the above description.

Instead of the bits of the primary signal identifier, the first signal and the second signal identifier may be bits of the TMCC information. Specifically, one of the polarized waves of the horizontal polarized wave and the vertical polarized wave is defined as a first polarized wave, the broadcast signal of the transmission wave transmitted by the first polarized wave is defined as a first signal, and the first signal and the second signal identifier bit may be set to "1" at the broadcasting station side. The other polarized wave may be defined as a second polarized wave, the broadcast signal of the transmission wave transmitted by the second polarized wave may be defined as a second signal, and the first signal and the second signal identifier bit may be set to "0" at the broadcasting station side. In the broadcast receiving apparatus 100 that receives the transmission wave of the polarized digital terrestrial broadcast according to the embodiment of the present invention, it is possible to identify in which polarization direction the received transmission wave is transmitted at the time of transmission by using the first signal second signal identifier bit. Note that, in the first signal and the second signal identifier bits, the concepts of "main polarization" and "sub polarization" are replaced with "first polarization" and "second polarization" as compared with the definition of the bits of the main signal identifier, and the processing and effects in the broadcast receiving apparatus 100 are only required to replace "main polarization" with "first polarization" and "sub polarization" with "second polarization" in the portion of the description of the bits of the main signal identifier related to the processing in the broadcast receiving apparatus 100, so that the description thereof will be omitted.

In addition, the definition of the meaning of "1" and "0" of the first signal second signal identifier bit may also be opposite to the above description.

The main signal identifier, the polarization direction identifier, and the first signal and second signal identifier are not necessary in the case where the broadcast wave is the service of the single polarization terrestrial digital broadcasting of the present embodiment and in the case where the broadcast wave is not the advanced terrestrial digital broadcasting service, and the parameter may be set to "1".

Next, in the transport wave of the layer division multiplexing terrestrial digital broadcasting according to the present embodiment, the upper and lower layer identifier bits may be used as one parameter of the TMCC information instead of the bits of the main signal identifier. Specifically, the upper and lower layer identifier bits may be set to "1" in the TMCC information of the modulated wave transmitted by the upper layer, and the upper and lower layer identifier bits may be set to "0" in the TMCC information of the modulated wave transmitted by the lower layer. In the case where the broadcast wave is not an advanced terrestrial digital broadcast service, the parameter may be set to "1".

In the layer division multiplexing terrestrial digital broadcasting of the present embodiment, frequency conversion and signal amplification may be performed by the conversion section 201L of fig. 2A for the lower layer of the plurality of modulated waves that were originally transmitted with the upper layer and the lower layer of 1 physical channel in the generation process of the OFDM transmission wave on the broadcasting station side, depending on the installation environment of the broadcast receiving apparatus 100. When a transmission wave of a layer multiplexing terrestrial digital broadcast is received, the broadcast receiving apparatus 100 can identify whether the transmission wave is originally a modulation wave transmitted in an upper layer or a modulation wave transmitted in a lower layer based on the upper and lower layer identifier bits. For example, by this identification process, it is possible to perform an initial scan of an advanced terrestrial digital broadcasting service transmitted by the lower layer after the completion of the initial scan of the existing terrestrial digital broadcasting service transmitted by the upper layer, and it is possible to reflect the setting of the initial scan by the existing terrestrial digital broadcasting service to the setting of the initial scan by the advanced terrestrial digital broadcasting service. In the third modem 130L of the broadcast receiving apparatus 100, the processing of the demodulator 133S and the processing of the demodulator 133L can be switched based on the identification result.

In the following description of the two-purpose transmission scheme of polarized waves in each embodiment, unless otherwise specified, an example will be described in which a horizontally polarized wave is a main polarized wave and a vertically polarized wave is a sub polarized wave. However, the main and sub relationships may be reversed with respect to horizontally polarized waves and vertically polarized waves.

Fig. 5I shows an example of bit allocation of the 4K signal transmission layer identifier.

In the case where the broadcast wave to be transmitted is the broadcast wave of the polarized wave dual-purpose terrestrial digital broadcasting service according to the present embodiment, the bit of the 4K signal transmission layer identifier may indicate whether or not to transmit the 4K broadcast program using both the horizontal polarized wave signal and the vertical polarized wave signal for the B layer and the C layer, respectively. 1 bit is allocated to each of the B layer setting and the C layer setting. For example, in the B layer and the C layer, when the bit of the 4K signal transmission layer identifier for each layer is "0", it is sufficient to indicate that the transmission of the 4K broadcast program is performed using both the horizontally polarized wave signal and the vertically polarized wave signal in the layer. In the B layer and the C layer, when the bit of the 4K signal transmission layer identifier for each layer is "1", it is sufficient to indicate that transmission of the 4K broadcast program using both the horizontally polarized wave signal and the vertically polarized wave signal is not performed in the layer. In this way, in the broadcast receiving apparatus 100, it is possible to identify whether or not transmission of a 4K broadcast program is performed using both the horizontally polarized wave signal and the vertically polarized wave signal in each of the B layer and the C layer using the bits of the 4K signal transmission layer identifier.

In the case where the broadcast wave to be transmitted is the broadcast wave of the single polarization terrestrial digital broadcast service according to the present embodiment, the bits of the 4K signal transmission layer identifier may indicate whether or not to transmit the 4K broadcast program for the B layer and the C layer, respectively. 1 bit is allocated to each of the B layer setting and the C layer setting. For example, in the B layer and the C layer, when the bit of the 4K signal transmission layer identifier for each layer is "0", it is sufficient to indicate that the transmission of the 4K broadcast program is performed in that layer. In the B layer and the C layer, when the bit of the 4K signal transmission layer identifier for each layer is "1", it is sufficient that the transmission of the 4K broadcast program is not performed in that layer. In this way, the broadcast receiving apparatus 100 can identify whether or not the 4K broadcast program is transmitted in each of the B layer and the C layer using the bit of the 4K signal transmission layer identifier.

In the case where the broadcast wave to be transmitted is the broadcast wave of the layer division multiplexing terrestrial digital broadcasting service according to the present embodiment, the bit of the 4K signal transmission layer identifier may indicate whether or not the transmission of the 4K broadcast program is performed by the lower layer. When "B119" of the parameter is "0", the lower layer is used to transmit the 4K broadcast program. If "B119" of the parameter is "1", the transmission of the 4K broadcast program is not performed by the lower layer. In this way, the broadcast receiving apparatus 100 can identify whether or not to transmit the 4K broadcast program with the lower layer using the bit of the 4K signal transmission layer identifier. In addition, in the case where the broadcast wave transmitted is the broadcast wave of the layer division multiplexing terrestrial digital broadcasting service of the present embodiment, B118 of the parameter may be undefined.

In the case where the parameter is "0", a NUC (Non-Uniform Constellation: non-uniform constellation) modulation scheme may be used as the carrier modulation mapping scheme in addition to the basic modulation scheme shown in fig. 5E. In this case, the current/subsequent information on the transmission parameter additional information of the B layer/C layer can be transmitted with AC1 or the like.

In addition, in the case where the transmitted broadcast wave is not an advanced terrestrial digital broadcasting service, the parameters may be set to "1", respectively.

In addition, the definition of "0" and "1" of the bits of the 4K signal transmission layer identifier described above may be reversed from the description above.

Fig. 5J shows an example of bit allocation to add a hierarchical transmission identifier. When the bit of the additional hierarchical transmission identifier indicates that the broadcast wave to be transmitted is the polarized wave dual-purpose terrestrial digital broadcasting service of the present embodiment, it is sufficient if the B layer and the C layer of the transmission wave to be transmitted by the sub-polarized wave are used as the virtual D layer or the virtual E layer, respectively.

For example, in the example of the figure, when the bit configured by B120 is a D layer transmission identifier bit and the parameter is "0", the B layer transmitted with the sub-polarization is used as the virtual D layer. In this regard, if expressed accurately, a group of segments having the same segment number as the segment subordinate to the B layer transmitted with the main polarization among the segments transmitted with the sub-polarization is regarded as a layer different from the B layer transmitted with the main polarization, i.e., a D layer. When the parameter is "1", the B layer transmitted with the sub-polarized wave is not used as the virtual D layer, but as the B layer.

For example, when the bit arranged in B121 is an E-layer transmission identifier bit and the parameter is "0", the C-layer transmitted with the sub-polarization is used as the virtual E-layer. In this regard, if expressed accurately, a group of segments having the same segment number as the segment subordinate to the C layer transmitted with the main polarization among the segments transmitted with the sub-polarization is regarded as a layer different from the C layer transmitted with the main polarization, i.e., an E layer. When the parameter is "1", the C layer transmitted with the sub-polarized wave is not used as the virtual E layer, but as the C layer.

In this way, the broadcast receiving apparatus 100 can identify whether or not the D layer and the E layer transmitted by the sub-polarized wave exist using the bit (the D layer transmission identifier bit and/or the E layer transmission identifier bit) to which the hierarchical transmission identifier is added. That is, in the terrestrial digital broadcasting of the present embodiment, by using the parameters of the additional hierarchical transmission identifier shown in fig. 5J, it is possible to apply new layers (D layers and E layers in the example of fig. 5J) beyond the number of layers limited to 3 layers, i.e., a layer, B layer, and C layer, in the existing terrestrial digital broadcasting.

In the case where the parameter is "0", the parameters such as the carrier modulation mapping scheme, the coding rate, and the time interleaving length shown in fig. 5C can be made different between the virtual D layer and the virtual E layer and between the virtual B layer and the C layer. In this case, if current/subsequent information on parameters such as the carrier modulation mapping scheme and the convolutional coding rate and the time interleaving length of the virtual D layer/virtual E layer is transmitted using AC information (e.g., AC 1) or the like, the broadcast receiving apparatus 100 can know the parameters such as the carrier modulation mapping scheme and the convolutional coding rate and the time interleaving length of the virtual D layer/virtual E layer.

In addition, as a modification, when the bit of the additional hierarchical transmission identifier (the D layer transmission identifier bit and/or the E layer transmission identifier bit) is "0", the transmission parameters of the B layer and/or the C layer of the current information/the subsequent information of the TMCC information transmitted by the sub-polarized wave may be switched to the meaning of the transmission parameters of the virtual D layer and/or the virtual E layer. In this case, when the virtual D layer and/or the virtual E layer are used, the transmission parameters of the layers a, B, and C may be used for the transmission of the current information and the subsequent information of the TMCC information transmitted by the main polarized wave. In addition, in the sub-polarized wave, the a layer, the D layer, and the E layer are used, and the transmission parameters of these layers may be used for the current information/subsequent information transmission of the TMCC information transmitted by the sub-polarized wave. In this case, the broadcast receiving apparatus 100 can also know parameters such as the carrier modulation mapping scheme, the convolutional coding rate, and the time interleaving length for the virtual D layer and the virtual E layer.

In addition, in the case where the broadcast wave to be transmitted is not an advanced terrestrial digital broadcast service or in the case where the broadcast wave is an advanced terrestrial digital broadcast service but is transmitted by a single polarization transmission method or a layer multiplexing transmission method, the parameters may be set to "1" respectively.

The parameters to which the hierarchical transmission identifier is added may be stored in both the TMCC information of the primary polarization and the TMCC information of the secondary polarization, but the above processing can be realized as long as at least the parameters are stored in the TMCC information of the secondary polarization.

The definition of "0" and "1" of the bits of the additional hierarchical transmission identifier described above may be reversed from the description above.

In addition, in the case where the parameter of the 4K signal transmission layer identifier indicates that the 4K broadcast program is transmitted using the B layer, even if the D layer transmission identifier bit indicates that the B layer is used as a virtual D layer, the broadcast receiving apparatus 100 may ignore the D layer transmission identifier bit. Similarly, in the case where the parameter of the 4K signal transmission layer identifier indicates that the 4K broadcast program is transmitted using the C layer, even if the E layer transmission identifier bit indicates that the C layer is used as the virtual E layer, the broadcast receiving apparatus 100 can ignore the E layer transmission identifier bit. By making the order of priority of the bits used in the judgment processing clear in this way, collision of the judgment processing in the broadcast receiving apparatus 100 can be prevented.

In the broadcast wave to be transmitted, the bits of the frequency conversion process identifier, the bits of the physical channel number identifier, the bits of the main signal identifier, the bits of the 4K signal transmission identifier, the bits of the additional hierarchical transmission identifier, and the like may be set to "1" when the parameter of the system identifier is not "10". Even if the parameter of the system identifier is not "10", the broadcast receiving apparatus 100 may be configured to ignore the bits other than "1" and determine that all the bits are "1" when the bits of the frequency conversion process identifier, the bits of the physical channel number identifier, the bits of the main signal identifier, the bits of the 4K signal transmission identifier, and the bits of the additional hierarchical transmission identifier are abnormally not "1" due to a problem.

Fig. 5K shows an example of bit allocation of the "coding rate" bits shown in fig. 5C, that is, the error correction coding rate identifier.

Here, in the terrestrial digital broadcasting scheme of the existing 2K broadcasting, an identifier bit for transmitting a coding rate dedicated to "convolutional coding" is transmitted. However, in the digital broadcasting of the present embodiment, the advanced terrestrial digital broadcasting service of the 4K broadcasting can be broadcast simultaneously with the terrestrial digital broadcasting service of the 2K broadcasting. Also, as already explained, in the advanced terrestrial digital broadcasting service of 4K broadcasting, LDPC coding can be used as the inner coding.

Then, unlike the conventional terrestrial digital broadcasting scheme of 2K broadcasting, the bits of the error correction code rate identifier of the present embodiment shown in fig. 5K are not code rate identifier bits dedicated to convolutional coding, but are configured to also support LDPC coding.

Here, in both the case of convolutional encoding and the case of LDPC encoding, the intra-encoding of the targeted terrestrial digital broadcasting service uses bits arranged in a common range as identifier bits for encoding rate transmission, thereby realizing the saving of the number of bits. Further, even if the same identifier bit is used, the setting of the coding rate is set independently in the case where the inner coding of the targeted terrestrial digital broadcasting service is convolutional coding and in the case where the inner coding is LDPC coding, and thus, as a digital broadcasting system, an option group suitable for the coding rate of each coding scheme can be used.

Specifically, in the example of fig. 5K, in the case where the identifier bit is "000", it means that the coding rate is 1/2 if the inner coding is convolutional coding, and that the coding rate is 2/3 if the inner coding is LDPC coding. In the case where the identifier bit is "001", it means that the coding rate is 2/3 if convolutional coding, and 3/4 if inner coding is LDPC coding. In the case where the identifier bit is "010", it means that the coding rate is 3/4 if the inner coding is convolutional coding, and that the coding rate is 5/6 if the inner coding is LDPC coding. In the case where the identifier bit is "011", it means that the coding rate is 5/6 if the inner coding is convolutional coding, and that the coding rate is 2/16 if the inner coding is LDPC coding. In the case where the identifier bit is "100", it means that the coding rate is 7/8 if the inner coding is convolutional coding, and that the coding rate is 6/16 if the inner coding is LDPC coding. In the case where the identifier bit is "101", it indicates undefined if the inner code is convolutional code, and indicates that the code rate is 10/16 if the inner code is LDPC code. In the case where the identifier bit is "110", it means undefined if the inner code is convolutional code, and means that the code rate is 14/16 if the inner code is LDPC code. If the layer is not used or if there is no subsequent information, the parameter is set to "111". In addition, the coding rate 2/3 may be used instead of the coding rate 81/120. Coding rate 3/4 may also be substituted for coding rate 89/120. Coding rate 5/6 may also be substituted for coding rate 101/120. In addition, code rates 8/16, code rates 12/16, and the like may also be allocated.

In addition, the identification of whether the inner code of the targeted terrestrial digital broadcasting service is convolutional code or LDPC code may be performed using the result of identifying whether the terrestrial digital broadcasting service is an existing terrestrial digital broadcasting service or an advanced terrestrial digital broadcasting service. The identification may be performed using the identifier bits described in fig. 5D or fig. 5I. Here, when the targeted terrestrial digital broadcasting service is the existing terrestrial digital broadcasting service, it is sufficient to recognize that the inner code is convolutional code. In addition, when the targeted terrestrial digital broadcasting service is an advanced terrestrial digital broadcasting service, it is sufficient to recognize that the inner code is LDPC code.

Further, as another example of whether the inner code of the terrestrial digital broadcasting service to be identified is convolutional code or LDPC code, the identification may be performed based on an identifier bit of an error correction scheme described later in fig. 6I.

If the error correction coding rate identifier bits shown in fig. 5K described above are used, it is preferable that a plurality of intra-coding schemes can be supported while preventing an increase in the number of identifier bits.

In the advanced terrestrial digital broadcasting service of the polarized wave dual-purpose transmission system, the TMCC information of the transmission wave transmitted by the water Ping Pianzhen wave may be the same as or different from the TMCC information of the transmission wave transmitted by the vertical polarized wave. Similarly, in the advanced terrestrial digital broadcasting service of the layer division multiplexing transmission scheme, the TMCC information of the transmission wave transmitted by the upper layer may be the same as or different from the TMCC information of the transmission wave transmitted by the lower layer. The parameters of the frequency conversion process identifier, the parameters of the main signal identifier, the additional hierarchical transmission identifier, and the like may be described only in TMCC information of a transmission wave transmitted by a sub-polarized wave or a transmission wave transmitted by a lower layer.

In the above description, the description has been given of an example in which the parameters of the frequency conversion process identifier, the parameters of the main signal identifier, the parameters of the polarization direction identifier, the parameters of the first signal and the second signal identifier, the parameters of the upper and lower layer identifiers, the parameters of the 4K signal transmission layer identifier, and the parameters of the additional hierarchical transmission identifier are included in the TMCC signal (TMCC carrier) for transmission. However, these parameters may also be included in the AC signal (AC carrier) for transmission. That is, these parameters may be used to perform signal transmission of a modulation-scheme-modulated carrier (TMCC carrier, AC carrier, or the like) having a smaller number of mapped modulation scheme states than the data carrier.

[ AC Signal ]

The AC signal is an additional information signal concerning broadcasting, and is additional information concerning transmission control of a modulated wave, seismic-alert information, or the like. Wherein the seismic-alert information is transmitted using the AC carrier of segment 0. On the other hand, additional information on transmission control of the modulated wave can be transmitted using an arbitrary AC carrier. Fig. 6A shows an example of bit allocation of an AC signal. The AC signal is composed of 204 bits (B0 to B203). B0 is a demodulation reference signal for AC symbols, and has a predetermined amplitude and phase reference. B1 to B3 are signals for identifying the structure of the AC signal. B4 to B203 are used to transmit additional information on transmission control of the modulated wave or to transmit seismic-alert information.

Fig. 6B shows an example of bit allocation of the structure identifier of the AC signal. When the seismic-warning information is transmitted using B4 to B203 of the AC signal, the parameter is set to "001" or "110". The parameter ("001" or "110") of the structure identifier in the case of transmitting the earthquake alarm information is set to the same code as the first 3 bits (B1 to B3) of the synchronization signal of the TMCC signal, and is transmitted alternately for each frame at the same timing as the TMCC signal. When the parameter is a value other than the above, it indicates that additional information on transmission control of the modulated wave is transmitted using B4 to B203 of the AC signal. In this case, the parameters of the structure identifier of the AC signal are alternately transmitted "000" and "111", or "010" and "101", or "011" and "100" for each frame.

B4 to B203 of the AC signal are used to transmit additional information on transmission control of the modulated wave or to transmit earthquake warning information.

The transmission of additional information regarding the transmission control of the modulated wave may be performed with various bit structures. For example, the frequency conversion process identifier, the physical channel number identifier, the primary signal identifier, the 4K signal transmission layer identifier, the additional hierarchical transmission identifier, and the like described in the description of the TMCC signal may be allocated bits in additional information on transmission control of the modulated wave of the AC signal instead of the TMCC signal or in addition to the TMCC signal, and transmitted. In this way, the broadcast receiving apparatus 100 can perform various kinds of identification processing described in the description of the TMCC signal using these parameters. In addition, current/subsequent information regarding transmission parameters of the virtual D layer/virtual E layer in the case where a certain parameter of the 4K signal transmission layer identifier is "0" or in the case where a certain parameter of the additional layered transmission identifier is "0" may be allocated. In this way, the broadcast receiving apparatus 100 can acquire the transmission parameters of each layer using these parameters, and can control the demodulation process of each layer.

The transmission of the seismic-alert information may also be performed using bit allocation as shown in FIG. 6C. The seismic-alert information is composed of a synchronization signal, a start/end flag, an update flag, a signal identifier, seismic-alert detailed information, a CRC, parity bits, and the like. The synchronization signal is composed of 13-bit codes, and is set to be the same code as the 13 bits (B4 to B16) except the first 3 bits of the synchronization signal of the TMCC signal. When the structure identifier of the AC signal indicates transmission of the earthquake alarm information, the 16-bit code formed by combining the structure identifier and the synchronization signal is a 16-bit synchronization word identical to the synchronization signal of the TMCC. The start/end flag is a 2-bit code as a flag of the start timing/end timing of the earthquake alarm information. The start/end flag is changed from "11" to "00" at the start of the transmission of the seismic-alert information, and from "00" to "11" at the end of the transmission of the seismic-alert information. The update flag is composed of a 2-bit code, and is incremented by "1" each time when the contents of the series of the earthquake alarm detailed information transmitted are changed in the case where the start/end flag is "00", with "00" as an initial value. Returning to "00" after "11". The update flag is also "11" in the case where the start/end flag is "11".

Fig. 6D shows an example of bit allocation of the signal identifier. The signal identifier is composed of a 3-bit code and is used for identifying the type of the detailed information of the earthquake alarm. In the case where the parameter is "000", the "earthquake alarm details (corresponding region exists)". When the parameter is "001", the "seismic-alert detailed information (no corresponding region exists)". When the parameter is "010", the parameter is a test signal (corresponding region exists) indicating "seismic-alert detailed information". When the parameter is "011", the parameter is "test signal (no corresponding region exists) indicating the detailed information of the earthquake alarm". In the case where the parameter is "111", it means "no earthquake alarm detailed information exists". In addition, in the case where the start/end flag is "00", the signal identifier is "000" or "001" or "010" or "011". In the case where the start/end flag is "11", the signal identifier is "111".

The seismic-alert detailed information is composed of 88-bit codes. In the case where the signal identifier is "000" or "001" or "010" or "011", the earthquake alarm detailed information transmits information on the current time of transmitting the earthquake alarm information and information indicating the region of the object of the earthquake alarm and information such as latitude/longitude/intensity of the earthquake of the object of the earthquake alarm. Fig. 6E shows an example of bit allocation of the seismic-alert detailed information in the case where the signal identifier is "000" or "001" or "010" or "011". In the case where the signal identifier is "111", the code for identifying the broadcast operator can be transmitted using the bit of the earthquake alarm detailed information. Fig. 6F shows an example of bit allocation of the seismic-warning detailed information in the case where the signal identifier is "111".

The CRC is a code generated using a predetermined generator polynomial for B21 to B111 in the earthquake alarm information. The parity bits are codes generated by shortened codes (187, 105) of difference set cyclic codes (273, 191) for B17 to B121 in the seismic-alert information.

The broadcast receiving apparatus 100 can perform various controls for coping with emergency situations by using the parameters concerning the earthquake alarm described in fig. 6C, 6D, 6E, and 6F. For example, control of presenting information about the earthquake alarm, control of switching display contents having low priority to display about the earthquake alarm, control of ending display of an application and switching to display about the earthquake alarm or broadcasting program video, and the like can be performed.

Fig. 6G shows an example of bit allocation of additional information concerning transmission control of a modulated wave. The additional information on the transmission control of the modulated wave is constituted by a synchronization signal, current information, subsequent information, parity bits, and the like. The synchronization signal is composed of 13-bit codes, and is set to be the same code as the 13 bits (B4 to B16) except the first 3 bits of the synchronization signal of the TMCC signal. The synchronization signal may not be the same code as the 13 bits (B4 to B16) other than the first 3 bits of the synchronization signal of the TMCC signal. When the structure identifier of the AC signal indicates that additional information related to transmission control of the modulated wave is transmitted, a 16-bit code formed by combining the structure identifier and the synchronization signal is a 16-bit synchronization word of the synchronization signal conforming to the TMCC. Or a 16-bit sync word different from the sync signal of the TMCC. The current information indicates transmission parameter additional information when a 4K broadcast program is transmitted with the B layer or the C layer, and current information on transmission parameters of the virtual D layer or the virtual E layer. The subsequent information indicates transmission parameter additional information when the 4K broadcast program is transmitted with the B layer or the C layer, and information after switching regarding transmission parameters of the virtual D layer or the virtual E layer.

In the example of fig. 6G, B18 to B30 of the current information are the current information of the B-layer transmission parameter additional information, and represent the current information of the transmission parameter additional information when the 4K broadcast program is transmitted in the B-layer. The pieces B31 to B43 of the current information are pieces of the current information of the C-layer transmission parameter additional information, and represent pieces of the current information of the transmission parameter additional information when the 4K broadcast program is transmitted by the C-layer. The B70 to B82 of the subsequent information are pieces of transmission parameter-switched information of the B-layer transmission parameter additional information, and represent pieces of transmission parameter-switched information of the transmission parameter additional information when the 4K broadcast program is transmitted by the B-layer. The B83 to B95 of the subsequent information are pieces of information after switching the transmission parameters of the C-layer transmission parameter additional information, and represent pieces of information after switching the transmission parameters of the transmission parameter additional information when the 4K broadcast program is transmitted by the C-layer. Here, the transmission parameter additional information refers to transmission parameters regarding modulation, which are extended by adding transmission parameters of the TMCC information shown in fig. 5C. The specific contents of the additional information about the transmission parameters are described later.

In the example of fig. 6G, B44 to B56 of the current information are the current information on the transmission parameters of the virtual D layer in the case where the virtual D layer is applied. B57 to B69 of the current information are current information on transmission parameters of the virtual E layer in the case where the virtual E layer is applied. The B96 to B108 of the subsequent information are information after switching of the transmission parameters of the virtual D layer in the case of applying the virtual D layer. The pieces of current information B109 to B121 are pieces of information after switching of transmission parameters of the virtual E layer in the case where the virtual E layer is applied. The transmission parameters for the virtual D layer and the parameters saved in the transmission parameters for the virtual E layer may be the same as those shown in fig. 5C.

The virtual D layer and the virtual E layer are layers that do not exist in the existing terrestrial digital broadcasting. The TMCC information of fig. 5B needs to maintain compatibility with existing terrestrial digital broadcasting, so that it is not easy to increase the number of bits. Thus, in the embodiment of the present invention, transmission parameters regarding the virtual D layer and the virtual E layer are stored in the AC information as shown in fig. 6G, not in the TMCC information.

Thus, it is possible to transmit information on modulation of new virtual D layer and virtual E layer to a receiving device while maintaining compatibility of TMCC information with existing terrestrial digital broadcasting. In this way, when the B layer/C layer of the transmission wave transmitted by the sub-polarized wave is used as the virtual D layer/virtual E layer in the broadcast wave of the polarized wave dual-purpose terrestrial digital broadcasting service of the present embodiment, the transmission parameters of the virtual D layer/virtual E layer of the transmission wave transmitted by the sub-polarized wave can be set to be different from the transmission parameters of the B layer/C layer of the transmission wave transmitted by the main polarized wave.

In addition, in the case where the virtual D layer or the virtual E layer is not used, there is no problem in that information on transmission parameters of layers that are not used is ignored in the broadcast receiving apparatus 100. For example, when the parameter of the TMCC information added hierarchical transmission identifier of fig. 5J indicates "1" for the virtual D layer or the virtual E layer (indicating that the virtual D layer/the virtual E layer is not used), the broadcast receiving apparatus 100 may ignore the parameter of the virtual D layer or the virtual E layer that is not used, regardless of the value stored in the transmission parameter shown in fig. 6G.

Next, details of the transmission parameter additional information described in fig. 6G will be described.

Fig. 6H shows a specific example of the transmission parameter additional information. The transmission parameter additional information may include parameters of an error correction scheme, parameters of a constellation scheme, and the like.

The error correction scheme indicates a coding scheme to be used for setting an error correction scheme for inner coding and outer coding when a 4K broadcast program (advanced terrestrial digital broadcasting service) is transmitted in a B layer or a C layer. Fig. 6I shows an example of bit allocation in the error correction method. In the case where the parameter is "000", when a 4K broadcast program is transmitted in the B layer or the C layer, convolutional encoding is used as inner encoding, and shortened RS encoding is used as outer encoding. In the case where the parameter is "001", when a 4K broadcast program is transmitted in the B layer or the C layer, LDPC coding is used as inner coding and BCH coding is used as outer coding. Further, other combinations can be set and selected.

In the case of transmitting a 4K broadcast program in the B layer or the C layer, not only a uniform constellation but also a non-uniform constellation (Non Uniform Constellation: NUC) can be used as the carrier modulation mapping method. Fig. 6J shows an example of bit allocation in the form of a constellation. If the parameter is "000", the carrier modulation mapping method selected by the transmission parameter of the TMCC information is applied in a uniform constellation. When the parameter is a value of any one of "001" to "111", a carrier modulation mapping scheme selected by the transmission parameter of the TMCC information is applied to the non-uniform constellation. In the case of using the uneven constellation, the optimal value of the uneven constellation is different depending on the type of error correction scheme, the encoding rate, and the like. Therefore, when the parameter of the constellation format is any one of "001" to "111", the broadcast receiving apparatus 100 of the present embodiment may determine the uneven constellation used in the demodulation process based on the parameter of the carrier modulation mapping scheme, the parameter of the error correction scheme, and the parameter of the encoding rate. This determination may be performed by the broadcast receiving apparatus 100 referring to a predetermined table or the like stored in advance.

[ Transmission mode 1 of advanced terrestrial digital broadcasting service ]

In order to realize 4K (horizontal 3840 pixels×vertical 2160 pixels) broadcasting while maintaining the current audio-visual environment of the terrestrial digital broadcasting service, a polarized wave dual-purpose transmission scheme will be described as an example of the transmission scheme of the advanced terrestrial digital broadcasting service according to the embodiment of the present invention. The polarized wave dual-purpose transmission method according to the embodiment of the present invention is a method in which a part of specifications are shared with the existing terrestrial digital broadcasting method. For example, 13 segments in the band of about 6MHz corresponding to 1 physical channel are divided, and 7 segments are allocated for transmission of a 2K (horizontal 1920 pixels×vertical 1080 pixels) broadcast program, 5 segments are allocated for transmission of a 4K broadcast program, and 1 segment is allocated for mobile reception (so-called single-segment broadcast), respectively. Furthermore, 5 segments for 4K broadcasting use not only horizontally polarized wave signals but also vertically polarized wave signals, and a total of 10 segments of transmission capacity is ensured by MIMO (Multiple-Input Multiple-Output) technology. In addition, the 2K broadcast program can be received by an existing television receiver by maintaining the image quality by optimizing the latest MPEG-2Video compression technique, etc., and the 4K broadcast program can be ensured by optimizing the HEVC compression technique and modulating the modulation multivalued technique more efficiently than the MPEG-2 Video. The number of segments allocated to each broadcast may be different from that described above.

Fig. 7A shows an example of a polarized wave dual-purpose transmission scheme in an advanced terrestrial digital broadcasting service according to an embodiment of the present invention. A frequency band of 470 to 710MHz is used for transmission of broadcast waves for terrestrial digital broadcasting services. The number of physical channels in the above frequency band is 40 channels of 13 to 52ch, and each physical channel has a bandwidth of 6 MHz. In the polarized wave dual-purpose transmission method of the embodiment of the present invention, both the horizontally polarized wave signal and the vertically polarized wave signal are used in 1 physical channel.

In fig. 7A, two examples of (1) and (2) are illustrated for allocation of 13 segments. (1) In the example of (a), transmission of a 2K broadcast program is performed using segments 1 to 7 (B layers) of a horizontally polarized wave signal. The transmission of the 4K broadcast program is performed using 10 segments in total of the segments 8 to 12 (C layers) of the horizontally polarized wave signal and the segments 8 to 12 (C layers) of the vertically polarized wave signal. Segments 1-7 (B layers) of the vertically polarized wave signal may also be used to transmit the same broadcast program as the 2K broadcast program transmitted with segments 1-7 (B layers) of the horizontally polarized wave signal. Alternatively, it is also possible to transmit a broadcast program different from a 2K broadcast program transmitted with segments 1 to 7 (B layers) of the horizontally polarized wave signal in segments 1 to 7 (B layers) of the vertically polarized wave signal. Alternatively, segments 1 to 7 (layer B) of the vertically polarized signal may be used for other data transmission, or may not be used. How to use the identification information of the segments 1 to 7 (B layers) of the vertical polarized wave signal can be transmitted to the receiving apparatus side by using the parameters of the 4K signal transmission layer identifier of the TMCC signal described above, the parameters of the additional layered transmission identifier, and the like. The broadcast receiving apparatus 100 can identify the processing of the segments 1 to 7 (B layers) of the vertically polarized signal using these parameters. In addition, the 2K broadcast program transmitted using the B layer of the horizontal polarized wave signal and the 4K broadcast program transmitted using the C layer of the horizontal/vertical polarized wave signal may be synchronous broadcast of broadcast programs transmitting the same content with different resolutions, or broadcast programs transmitting different contents. Segment 0 of the horizontal/vertical polarized wave signals performs transmission of the same single-segment broadcast program.

The example of (2) in fig. 7A is a modification different from (1). (2) In the example of (a), transmission of a 4K broadcast program is performed using 10 segments in total of segments 1 to 5 (B layers) of a horizontally polarized wave signal and segments 1 to 5 (B layers) of a vertically polarized wave signal. The transmission of 2K broadcast programs is performed using segments 6 to 12 (C layers) of the horizontally polarized wave signal. (2) In the example of (a), the segments 6 to 12 (C layers) of the vertically polarized wave signal may also be used to transmit the same broadcast program as the 2K broadcast program transmitted with the segments 6 to 12 (C layers) of the horizontally polarized wave signal. Segments 6-12 (C layers) of the vertically polarized wave signal may also be used to transmit a different broadcast program than the 2K broadcast program transmitted with segments 6-12 (C layers) of the horizontally polarized wave signal. In addition, segments 6-12 (layer C) of the vertically polarized signal may or may not be used for other data transmission. These identification information are the same as those of the example of (1), and therefore, description thereof will be omitted.

In addition, the examples of (1) and (2) of fig. 7A both illustrate examples of the case where the horizontally polarized wave is the main polarized wave, but depending on the application, the horizontally polarized wave may be inverted from the vertically polarized wave.

Fig. 7B shows an example of a configuration of a broadcast system of an advanced terrestrial digital broadcasting service using a polarized wave dual-purpose transmission system according to an embodiment of the present invention. Together, a system of a sender and a system of a receiver of an advanced terrestrial digital broadcasting service using a polarized wave dual-purpose transmission scheme are shown. The configuration of a broadcast system using an advanced terrestrial digital broadcasting service of a polarized wave dual-purpose transmission scheme is basically the same as that of the broadcast system shown in fig. 1, but a radio tower 300T as a device of a broadcast station is a polarized wave common transmission antenna capable of simultaneously transmitting a horizontally polarized wave signal and a vertically polarized wave signal. In the example of fig. 7B, only the tuning/detecting section 131H and the tuning/detecting section 131V of the second modem section 130T are selected and described in the broadcast receiving apparatus 100, and the description of other operation sections is omitted.

The horizontally polarized wave signal transmitted from the radio tower 300T is received by the horizontally polarized wave receiving element of the antenna 200T, which is a polarized wave common receiving antenna, and is input to the tuning/detecting unit 131H from the connector unit 100F1 via the coaxial cable 202T 1. On the other hand, the vertically polarized signal transmitted from the radio tower 300T is received by the vertically polarized wave receiving element of the antenna 200T, and is input to the tuning/detecting unit 131V from the connector unit 100F2 via the coaxial cable 202T 2. An F-type connector is generally used as a connector portion for connecting an antenna (coaxial cable) to a television receiver.

Here, there is also a possibility that the user may connect the coaxial cable 202T1 to the connector portion 100F2 by mistake, and connect the coaxial cable 202T2 to the connector portion 100F 1. In this case, there is a possibility that a failure such as a failure to identify whether the input broadcast signal is a horizontally polarized signal or a vertically polarized signal occurs in the tuning/detecting unit 131H and the tuning/detecting unit 131V. In order to prevent the above-described failure, it is conceivable to make one of the connector portions connecting the antenna (coaxial cable) and the television receiver, for example, the connector portion of the coaxial cable 202T2 and the connector portion 100F2 transmitting the vertically polarized wave signal, a connector portion of a different shape from the F-type connector of the connector portion of the coaxial cable 202T1 and the connector portion 100F1 transmitting the horizontally polarized wave signal, or the like. Alternatively, the tuning/detecting units 131H and 131V may be controlled to refer to the main signal identifier of the TMCC information of each input signal, respectively, to thereby identify whether the input broadcast signal is a horizontally polarized signal or a vertically polarized signal, and to operate the signals. Instead of 2 coaxial cables, that is, coaxial cable 202T1 and coaxial cable 202T2, one multi-core coaxial cable may be used to connect antenna 200T to broadcast receiving apparatus 100.

Fig. 7C shows an example of a configuration of a broadcast system of an advanced terrestrial digital broadcasting service using a polarized wave dual-purpose transmission system according to an embodiment of the present invention, which is different from the above configuration. As shown in fig. 7B, the broadcast receiving apparatus 100 includes two broadcast signal input connector portions, and a configuration using two coaxial cables for connection between the antenna 200T and the broadcast receiving apparatus 100 is not necessarily preferable in terms of equipment cost, cable wiring processing, and the like. Then, in the configuration shown in fig. 7C, the horizontally polarized wave signal received by the horizontally polarized wave receiving element of the antenna 200T and the vertically polarized wave signal received by the vertically polarized wave receiving element of the antenna 200T are input to the conversion unit (converter) 201T, and the conversion unit 201T is connected to the broadcast receiving apparatus 100 by one coaxial cable 202T 3. The broadcast signal inputted from the connector unit 100F3 is demultiplexed and inputted to the tuning/detecting unit 131H and the tuning/detecting unit 131V. The connector unit 100F3 may have a function of supplying the conversion unit 201T with operating power.

The conversion unit 201T may be a device for setting the environment (for example, a collective residence) of the broadcast receiving apparatus 100. Alternatively, the antenna 200T may be provided in a house or the like as an integrated device. The conversion unit 201T performs frequency conversion processing on either the horizontally polarized wave signal received by the horizontally polarized wave receiving element of the antenna 200T or the vertically polarized wave signal received by the vertically polarized wave receiving element of the antenna 200T. By this processing, the horizontally polarized wave signal and the vertically polarized wave signal transmitted from the radio tower 300T to the antenna 200T using the horizontally polarized wave and the vertically polarized wave of the same frequency band are separated into mutually different frequency bands, and can be simultaneously transmitted to the broadcast receiving apparatus 100 by one coaxial cable 202T 3. In addition, if necessary, frequency conversion processing may be performed on both the horizontally polarized wave signal and the vertically polarized wave signal, and in this case, the frequency bands of both the signals after frequency conversion need to be different from each other. The broadcast receiving apparatus 100 may further include 1 broadcast signal input connector unit 100F 3.

Fig. 7D shows an example of the frequency conversion process. In this example, the frequency conversion processing is performed on the vertically polarized wave signal. Specifically, the frequency band of the vertically polarized wave signal out of the horizontally polarized wave signal and the vertically polarized wave signal transmitted in the frequency band of 470 to 710MHz (corresponding to the frequency band of 13 to 52ch of UHF) is converted from the frequency band of 470 to 710MHz to the frequency band of 770 to 1010 MHz. By this processing, signals transmitted using the same frequency band of horizontally polarized waves and vertically polarized waves can be transmitted simultaneously to the broadcast receiving apparatus 100 by one coaxial cable 202T3 without interfering with each other. In addition, the horizontally polarized wave signal may be subjected to frequency conversion processing.

The frequency conversion process is preferably performed on the signal transmitted by the sub-polarized wave in accordance with the result of the main signal identifier with reference to the TMCC information. As illustrated in fig. 5H, the signal transmitted with the primary polarization has a higher probability of being transmitted including the existing terrestrial digital broadcasting service than the signal transmitted with the secondary polarization. Therefore, in order to better maintain compatibility with existing terrestrial digital broadcasting services, it is preferable that signals transmitted by the main polarization are not frequency-converted and signals transmitted by the sub polarization are frequency-converted.

In the case of frequency-converting the signal transmitted by the sub-polarized wave, it is preferable that the frequency band of the signal transmitted by the sub-polarized wave is higher than the frequency band of the signal transmitted by the main polarized wave in the converted signal. Thus, in the initial scanning of the broadcast receiving apparatus 100, the signal transmitted by the main polarization can be initially scanned before the signal transmitted by the sub-polarization by simply scanning from the low frequency side to the high frequency side. This makes it possible to better perform processing and the like for reflecting the setting of the initial scan by the existing terrestrial digital broadcasting service to the setting of the initial scan by the advanced terrestrial digital broadcasting service.

The frequency conversion process may be performed on all physical channels used in the advanced terrestrial digital broadcasting service, or may be performed only on physical channels to which signal transmission by the polarized wave dual-purpose transmission scheme is applied.

The frequency band after conversion by the frequency conversion process is preferably between 710 and 1032 MHz. That is, in the case where the terrestrial digital broadcasting service and the BS/CS digital broadcasting service are to be received simultaneously, it is considered that the broadcast signal of the terrestrial digital broadcasting service received by the antenna 200T and the broadcast signal of the BS/CS digital broadcasting service received by the antenna 200B are mixed and transmitted to the broadcast receiving apparatus 100 by one coaxial cable. In this case, since the BS/CS-IF signal uses a frequency band of the order of 1032 to 2150MHz, IF the frequency band converted by the frequency conversion process is between 710 to 1032MHz, interference between the horizontally polarized wave signal and the vertically polarized wave signal can be avoided, and interference between the broadcast signal of the terrestrial digital broadcasting service and the broadcast signal of the BS/CS digital broadcasting service can be avoided. In addition, when a broadcast signal or the like is to be transmitted to a Cable television (Community Antenna TV or Cable TV: CATV) station, it is more preferable that the frequency band converted by the frequency conversion process is set to a frequency band between 770 and 1032MHz exceeding the frequency band corresponding to 62ch of UHF, because a frequency band of 770MHz or less (corresponding to 62ch of UHF) is used for the broadcast distribution of television by the Cable television station.

The bandwidth of the region (a part a in the figure) between the frequency band before conversion and the frequency band after conversion by the frequency conversion process is preferably set to be an integer multiple of the bandwidth (6 MHz) of 1 physical channel. In this way, the broadcast receiving apparatus 100 has an advantage that frequency setting control is easy when frequency scanning is performed on both the broadcast signal of the frequency band before conversion and the broadcast signal of the frequency band after conversion by the frequency conversion process.

In addition, as described above, in the polarized wave dual transmission scheme of the embodiment of the present invention, both the horizontally polarized wave signal and the vertically polarized wave signal are used for the transmission of the 4K broadcast program. Thus, in order to accurately reproduce the 4K broadcast program, it is necessary to accurately know a combination of physical channels of the broadcast signal transmitted with the water Ping Pianzhen wave and the broadcast signal transmitted with the vertical polarized wave at the receiving side. Even in the case where the frequency conversion processing is performed, and the broadcast signal transmitted with the water Ping Pianzhen wave and the broadcast signal transmitted with the vertical polarized wave are input to the receiving apparatus as signals of mutually different frequency bands, in the broadcast receiving apparatus 100 of the present embodiment, the combination of the broadcast signal transmitted with the water Ping Pianzhen wave and the broadcast signal transmitted with the vertical polarized wave of the same physical channel can be accurately known by appropriately referring to the parameters (for example, the main signal identifier and the physical channel number identifier) of the TMCC information shown in fig. 5F to 5J. Thus, the broadcast receiving apparatus 100 according to the present embodiment can appropriately receive and demodulate and reproduce a 4K broadcast program.

In addition, the examples of fig. 7B, 7C, and 7D each illustrate an example in the case where the horizontally polarized wave is the main polarized wave, but depending on the application, the horizontally polarized wave may be inverted from the vertically polarized wave.

The broadcast wave of the terrestrial digital broadcast transmitted by the polarized wave dual transmission system described above can be received and reproduced by the second modem 130T of the broadcast receiving apparatus 100 as described above, but can also be received by the first modem 130C of the broadcast receiving apparatus 100. When the broadcast wave of the terrestrial digital broadcast is received by the first modem 130C, the broadcast signal transmitted by the layer of the advanced terrestrial digital broadcast service is ignored among the broadcast signals of the broadcast wave of the terrestrial digital broadcast, but the broadcast signal transmitted by the layer of the existing terrestrial digital broadcast service is reproduced.

Straight-through transmission mode of advanced terrestrial digital broadcasting service

The broadcast receiving apparatus 100 can receive a signal transmitted in a through transmission manner. The direct transmission system is a system in which a cable television station or the like transmits a received broadcast signal to a CATV distribution system while maintaining an original signal system and performing frequency conversion at the same frequency.

The pass-through method includes (1) a method of extracting and adjusting the level of the transmission signal band of each terrestrial digital broadcast signal outputted from the terrestrial wave receiving antenna and transmitting the signal band to the CATV facility at the same frequency as the transmission signal frequency, and (2) a method of extracting and adjusting the level of the transmission signal band of each terrestrial digital broadcast signal outputted from the terrestrial wave receiving antenna and transmitting the signal band to the CATV facility at the frequency of the VHF band, MID band, SHB band, or UHF band set by the CATV facility manager. The device constituting the receiving amplifier for performing the signal processing according to the first aspect or the device constituting the receiving amplifier and the frequency converter for performing the signal processing according to the second aspect is an OFDM signal processor (OFDM Signal Processor: OFDM-SP).

Fig. 7E shows an example of a system configuration in the case where the first aspect of the through transmission method is applied to the advanced terrestrial digital broadcasting service of the polarized dual-purpose transmission method. In fig. 7E, a headend device 400C of a cable station and the broadcast receiving apparatus 100 are shown. Fig. 7F shows an example of the frequency conversion process at this time. The (h·v) mark in fig. 7F indicates the state where both the broadcast signal transmitted with the water Ping Pianzhen wave and the broadcast signal transmitted with the vertical polarized wave exist in the same frequency band, (H) mark indicates the broadcast signal transmitted with the water Ping Pianzhen wave, and (V) mark indicates the broadcast signal transmitted with the vertical polarized wave. The same applies to the marks in fig. 7H and 7I.

In the case where the above-described through transmission of the first embodiment is applied to the advanced terrestrial digital broadcasting service of the polarized dual-purpose transmission scheme of the embodiment of the present invention, signal band extraction and level adjustment are performed in the headend equipment 400C of the cable television station for the broadcast signal transmitted by the water Ping Pianzhen wave, and transmission is performed at the same frequency as the transmission signal frequency. On the other hand, the broadcast signal transmitted by the vertical polarization is subjected to signal band extraction and level adjustment in the headend equipment 400C of the cable television station, and is subjected to the same frequency conversion processing as described in fig. 7D (processing of converting the broadcast signal transmitted by the vertical polarization into a frequency band higher than the frequency band corresponding to 13ch to 62ch of UHF, that is, the frequency band of 470 to 770 MHz), and is then transmitted. By this processing, the frequency band of the broadcast signal transmitted by the water Ping Pianzhen wave and the broadcast signal transmitted by the vertically polarized wave is not repeated, so that signal transmission can be performed by one coaxial cable (or optical fiber cable). The transmitted signal can be received with the broadcast receiving apparatus 100 of the present embodiment. The processing of receiving and demodulating the broadcast signal transmitted by the water Ping Pianzhen wave and the broadcast signal transmitted by the vertically polarized wave included in the signal in the broadcast receiving apparatus 100 of the present embodiment is the same as that described in fig. 7D, and therefore, a description thereof will be omitted.

Fig. 7G shows an example of a system configuration in the case where the second aspect of the through transmission method is applied to the advanced terrestrial digital broadcasting service of the polarized dual-purpose transmission method. Fig. 7G shows a headend device 400C of a cable station and the broadcast receiving apparatus 100. Fig. 7H shows an example of the frequency conversion process at this time.

When the above-described through transmission of the second embodiment is applied to the advanced terrestrial digital broadcasting service of the polarized dual-purpose transmission system according to the embodiment of the present invention, the signal band extraction and the level adjustment are performed in the headend 400C of the cable television station for the broadcast signal transmitted by the water Ping Pianzhen wave, and the signal band extraction and the level adjustment are performed and then transmitted after the frequency conversion process of the frequency set to the CATV facility manager is performed. On the other hand, the broadcast signal transmitted by the vertical polarization is subjected to signal band extraction and level adjustment in the headend equipment 400C of the cable television station, and is subjected to the same frequency conversion processing as described in fig. 7D (processing of converting the broadcast signal transmitted by the vertical polarization into a frequency band higher than the frequency band corresponding to 13ch to 62ch of UHF, that is, the frequency band of 470 to 770 MHz), and is then transmitted. The frequency conversion process shown in fig. 7H is different from that of fig. 7F in that the broadcast signal transmitted by the water Ping Pianzhen wave is frequency-converted so as not to be retained in the frequency band of 470 to 770MHz which is the frequency band of 13 to 62ch of UHF, but to be rearranged in the range of 90 to 770MHz by expanding the range to a lower frequency band. By this processing, the frequency band of the broadcast signal transmitted by the water Ping Pianzhen wave and the broadcast signal transmitted by the vertically polarized wave is not repeated, so that signal transmission can be performed by one coaxial cable (or optical fiber cable). The transmitted signal can be received with the broadcast receiving apparatus 100 of the present embodiment. The processing of receiving and demodulating the broadcast signal transmitted by the water Ping Pianzhen wave and the broadcast signal transmitted by the vertically polarized wave included in the signal in the broadcast receiving apparatus 100 of the present embodiment is the same as that described in fig. 7D, and therefore, a description thereof will be omitted.

As another modification of the frequency conversion process of the headend 400C of the cable television station in fig. 7G, the broadcast signal at the time of the through output after the frequency conversion may be changed from fig. 7H to the state shown in fig. 7I. In this case, both the broadcast signal transmitted by the water Ping Pianzhen wave and the broadcast signal transmitted by the vertically polarized wave are subjected to signal band extraction and level adjustment, and are subjected to frequency conversion processing of a frequency set to the CATV facility manager, and then transmitted. In the example of fig. 7I, since the broadcast signal transmitted by the water Ping Pianzhen wave and the broadcast signal transmitted by the vertical polarized wave are both frequency-converted so as to be rearranged in the range of 90 to 770MHz (the range from VHF1ch to UHF62 ch), and the frequency band exceeding the range of UHF62ch is not used, the frequency band use efficiency of the broadcast signal is higher than that of fig. 7H.

Further, since the frequency band in which the broadcast signal is rearranged is wider than the frequency band of 13 to 52ch, that is, the frequency band of 470 to 710MHz, of the UHF at the time of antenna reception, the broadcast signal transmitted with the horizontally polarized wave and the broadcast signal transmitted with the vertically polarized wave can be rearranged alternately as shown in the example of fig. 7I. At this time, as shown in the example of fig. 7I, if the broadcast signals transmitted by the pair of water Ping Pianzhen waves and the broadcast signals transmitted by the vertical polarized wave, which are the same physical channel at the time of antenna reception, are alternately rearranged in the order of the physical channels at the time of antenna reception, when the broadcast receiving apparatus 100 of the present embodiment performs initial scanning from the low frequency side, the broadcast signals transmitted by the pair of water Ping Pianzhen waves and the broadcast signals transmitted by the vertical polarized wave, which are the same physical channel originally, can be sequentially set in the order of the same physical channel originally, and initial scanning can be performed efficiently.

In addition, the examples of fig. 7E, 7F, 7G, 7H, and 7I all illustrate examples in the case where the horizontally polarized wave is the main polarized wave, but depending on the application, the horizontally polarized wave may be inverted from the vertically polarized wave.

In addition, as described above, the broadcast wave of the terrestrial digital broadcast using the polarization dual-purpose transmission scheme of the through transmission scheme can be received and reproduced by the second modem 130T of the broadcast receiving apparatus 100, but can also be received by the first modem 130C of the broadcast receiving apparatus 100. When the broadcast wave of the terrestrial digital broadcast is received by the first modem 130C, the broadcast signal transmitted by the layer of the advanced terrestrial digital broadcast service is ignored among the broadcast signals of the broadcast wave of the terrestrial digital broadcast, but the broadcast signal transmitted by the layer of the existing terrestrial digital broadcast service is reproduced.

[ Transmission method 2 of advanced terrestrial digital broadcasting service ]

In order to maintain the current audio-visual environment of the terrestrial digital broadcasting service and realize 4K broadcasting at the same time, a description will be given of a single polarization transmission scheme as an example of the transmission scheme of the advanced terrestrial digital broadcasting service according to the embodiment of the present invention, which is different from the above. The Single polarization transmission method according to the embodiment of the present invention is a method in which a part of specifications are shared with the existing terrestrial digital broadcasting method, and is a method in which data transmission is performed by a SISO (Single Input Single Output) technique using either a horizontal polarization signal or a vertical polarization signal. For example, 13 segments in the band of about 6MHz corresponding to 1 physical channel are divided, and 8 segments are allocated for transmitting a 2K broadcast program, 4 segments are allocated for transmitting a 4K broadcast program, and 1 segment is allocated for mobile reception, respectively. In addition, the 2K broadcast program is maintained in image quality by optimizing the latest MPEG-2Video compression technique, etc., so that it can be received by an existing television receiver, and the 4K broadcast program is ensured in image quality by using HEVC compression technique, VVC compression technique, etc., which are more efficient than the MPEG-2Video, and modulation multivalued technique, NUC technique, etc. The number of segments allocated to each broadcast may be different from that described above.

Fig. 7J shows an example of a single polarization transmission scheme in an advanced terrestrial digital broadcasting service according to an embodiment of the present invention. A frequency band of 470 to 710MHz is used for transmission of broadcast waves for terrestrial digital broadcasting services. The number of physical channels in the above frequency band is 40 channels of 13 to 52ch, and each physical channel has a bandwidth of 6 MHz. In the single polarization transmission mode of the embodiment of the invention, the transmission of the 2K broadcast service and the transmission of the 4K broadcast service are simultaneously carried out in 1 physical channel.

In fig. 7J, two examples of (1) and (2) are illustrated for allocation of 13 segments. (1) In the example of (a), transmission of a 4K broadcast program is performed using segments 1 to 4 (B layers). The transmission of the 2K broadcast program is performed using segments 5 to 12 (C layers). The 4K broadcast program transmitted using the B layer and the 2K broadcast program transmitted using the C layer may be synchronous broadcast of broadcast programs transmitting the same content at different resolutions, or broadcast programs of different contents may be transmitted. The example of (2) is a modification different from (1). (2) In the example of (a), transmission of 2K broadcast programs is performed using segments 1 to 8 (B layers). The transmission of the 4K broadcast program is performed using segments 9 to 12 (C layers).

Fig. 7K shows an example of a configuration of a broadcast system of an advanced terrestrial digital broadcasting service using a single polarization transmission scheme according to an embodiment of the present invention. Together, a system of a sender and a system of a receiver of an advanced terrestrial digital broadcasting service using a single polarized wave transmission scheme are shown. The configuration of a broadcast system using an advanced terrestrial digital broadcasting service of a single polarization transmission scheme is basically the same as that of the broadcast system shown in fig. 1, but a radio tower 300S as a device of a broadcasting station is a single polarization transmitting antenna capable of transmitting either one of a horizontally polarized wave signal and a vertically polarized wave signal. In the example of fig. 7K, only the tuning/detecting section 131H of the second modem section 130T is selected and described for the broadcast receiving apparatus 100, and the description of the other operation sections is omitted.

The single polarization signal transmitted from the radio tower 300S is received by the antenna 200S, which is a single polarization receiving antenna, and is input to the tuning/detecting unit 131H from the connector unit 100F3 via the coaxial cable 202S. An F-type connector is generally used as a connector portion for connecting an antenna (coaxial cable) to a television receiver. In the configuration of the broadcast system using the advanced terrestrial digital broadcasting system of the single polarization transmission system, the antenna 200S can be connected to the broadcast receiving apparatus 100 by one coaxial cable 202S, and frequency conversion processing (conversion unit) is not required, which is preferable.

The broadcast wave of the terrestrial digital broadcast transmitted by the single polarization transmission system described above can be received and reproduced by the second modem 130T of the broadcast receiving apparatus 100 as described above, but can also be received by the first modem 130C of the broadcast receiving apparatus 100. When the broadcast wave of the terrestrial digital broadcast is received by the first modem 130C, the broadcast signal transmitted by the layer of the advanced terrestrial digital broadcast service is ignored among the broadcast signals of the broadcast wave of the terrestrial digital broadcast, but the broadcast signal transmitted by the layer of the existing terrestrial digital broadcast service is reproduced.

[ Transmission mode 3 of advanced terrestrial digital broadcasting service ]

In order to maintain the current audio-visual environment of the terrestrial digital broadcasting service and realize the 4K broadcasting at the same time, a layer multiplexing transmission scheme will be described as an example of the transmission scheme of the advanced terrestrial digital broadcasting service according to the embodiment of the present invention, which is different from the above. The layer multiplexing transmission scheme of the embodiment of the present invention is a scheme in which a part of specifications are shared with the existing terrestrial digital broadcasting scheme. For example, a broadcast wave of a 4K broadcast service whose transmission signal level is a low level is multiplexed in the same channel as a broadcast wave of an existing 2K broadcast service. In addition, the reception level of the 4K broadcast is suppressed to be equal to or less than the required C/N for the 2K broadcast, and the same reception as in the conventional case is performed. For 4K broadcasting, transmission capacity is increased by modulation multivalued or the like, and a reception technique supporting LDM (layer division multiplexing) technique is used to cancel out 2K broadcast waves and to receive the remaining 4K broadcast waves.

Fig. 8A shows an example of a layer multiplexing transmission scheme in an advanced terrestrial digital broadcasting service according to an embodiment of the present invention. The upper layer is constituted by the modulation wave of the current 2K broadcast, the lower layer is constituted by the modulation wave of the 4K broadcast, and the upper layer and the lower layer are multiplexed and outputted as a composite wave in the same frequency band. For example, a configuration may be adopted in which 64QAM or the like is used as the modulation scheme in the upper layer, and 256QAM or the like is used as the modulation scheme in the lower layer. In addition, the 2K broadcast program transmitted by the upper layer and the 4K broadcast program transmitted by the lower layer may be synchronous broadcast of broadcast programs transmitting the same content at different resolutions, or broadcast programs of different contents may be transmitted. Here, the upper layer transmits at high power and the lower layer transmits at low power. The difference between the modulation wave Level of the upper layer and the modulation wave Level of the lower layer (difference in power) is referred to as an Injection Level (IL), which is a value set on the broadcast station side. The injection level is typically expressed as a relative ratio (dB) in logarithmic representation, representing the difference in modulation wave level (difference in power).

Fig. 8B shows an example of a configuration of a broadcast system of an advanced terrestrial digital broadcasting service using a layer multiplexing transmission scheme according to an embodiment of the present invention. The configuration of a broadcast system using an advanced terrestrial digital broadcast service of a layer division multiplexing transmission scheme is basically the same as that of the broadcast system shown in fig. 1, but a radio tower 300L as a device of a broadcast station is a transmission antenna that transmits a broadcast signal in which 2K broadcasting of an upper layer and 4K broadcasting of a lower layer are multiplexed. In the example of fig. 8B, only the tuning/detecting section 131L of the third modem section 130L is selected and described in the broadcast receiving apparatus 100, and the description of other operation sections is omitted.

The broadcast signal received by the antenna 200L is input from the connector unit 100F4 to the tuning/detecting unit 131L via the conversion unit (converter) 201L and the coaxial cable 202L. Here, with the above configuration, when a broadcast signal is transmitted from the antenna 200L to the broadcast receiving apparatus 100, as shown in fig. 8C, the conversion unit 201L may perform frequency conversion amplification processing on the broadcast signal. That is, when the antenna 200L is provided on the roof of an apartment building or the like and the broadcast signal is transmitted to the broadcast receiving apparatus 100 in each room by the coaxial cable 202L having a long cable length, the broadcast signal may be attenuated, and it is considered that a failure may occur in the tuning/detecting unit 131L, in which the lower layer 4K broadcast wave is particularly not properly received.

Then, in order to prevent the above-described failure, the conversion unit 201L performs frequency conversion amplification processing on the lower-layer 4K broadcast signal. The frequency conversion amplification process converts the frequency band of the lower layer 4K broadcast signal from a frequency band of 470 to 710MHz (a frequency band of 13 to 52ch corresponding to UHF), for example, to a frequency band of 770 to 1010MHz exceeding a frequency band of 62ch corresponding to UHF. Further, a process of amplifying the lower layer 4K broadcast signal to a signal level at which the influence of attenuation in the cable is not problematic is performed. By performing such processing, interference between the 2K broadcast signal and the 4K broadcast signal can be avoided, and the influence of attenuation of the broadcast signal during coaxial cable transmission can be avoided. In addition, when the influence of attenuation is not problematic, such as when the cable length of the coaxial cable 202L is short, the conversion unit 201L and the frequency conversion amplification process may not be required.

As shown in fig. 8D, the channel selection/detection unit 131L1 performing the channel selection/detection and the like for the modulated wave of the upper layer (2K broadcast) and the channel selection/detection unit 131L2 performing the channel selection/detection and the like for the modulated wave of the lower layer (4K broadcast) may constitute a channel selection/detection unit provided in the third modem unit 130L of the broadcast receiving apparatus 100. With such a configuration, the signal subjected to the frequency conversion amplification processing by the conversion unit 201L can be subjected to processing such as channel selection and detection simultaneously with the 2K broadcast signal and the 4K broadcast signal transmitted from the broadcast station using the same physical channel, and in particular, can be subjected to appropriate processing during synchronous broadcasting or the like.

The frequency band after conversion by the frequency conversion amplification process is preferably set to between 710 and 1032MHz exceeding the frequency band corresponding to 52ch of UHF or between 770 and 1032MHz exceeding the frequency band corresponding to 62ch of UHF (in the case of transmission by a cable television station or the like), and the bandwidth of the region between the frequency band before conversion by the frequency conversion amplification process and the frequency band after conversion is preferably set to an integer multiple of the bandwidth of 1 physical channel (6 MHz), and the frequency conversion amplification process may be performed only for physical channels using signal transmission by the layer multiplexing transmission method, and these are the same as those described in the present embodiment of the frequency conversion, and therefore description thereof will be omitted.

In addition, the broadcast receiving apparatus 100 of the present embodiment can identify whether the received broadcast signal is a broadcast signal transmitted with a lower layer or a broadcast signal transmitted with an upper layer using the upper and lower layer identifier bits of the TMCC information illustrated in fig. 5H. In addition, the broadcast receiving apparatus 100 of the present embodiment can identify whether or not the received broadcast signal is a broadcast signal subjected to frequency conversion after antenna reception using the frequency conversion process identifier bits of the TMCC information described in fig. 5F. In addition, the broadcast receiving apparatus 100 of the present embodiment can identify whether the received broadcast signal is to transmit a 4K program with the lower layer using the 4K signal transmission layer identifier bit of the TMCC information described in fig. 5I. These identification processes are not impossible to demodulate the data carrier and refer to control information included in the stream, but require demodulation of the data carrier, and the process becomes complicated. Since the identification is performed with reference to the parameters of the TMCC information, the processing is simplified and the processing is performed at a high speed, and thus, for example, the initial scanning of the broadcast receiving device 100 can be performed at a higher speed.

In addition, the channel selection/detection unit 131L of the third modem unit 130L of the broadcast receiving apparatus 100 according to the embodiment of the present invention has a receiving function supporting LDM (layer division multiplexing) technology as described above, and therefore the conversion unit 201L shown in fig. 8B is not necessarily required between the antenna 200L and the broadcast receiving apparatus 100.

The broadcast wave of the terrestrial digital broadcast transmitted by the layer multiplexing transmission system described above can be received and reproduced by the third modem 130L of the broadcast receiving apparatus 100 as described above, but can also be received by the first modem 130C of the broadcast receiving apparatus 100. When the broadcast wave of the terrestrial digital broadcast is received by the first modem 130C, the broadcast signal transmitted by the layer of the advanced terrestrial digital broadcast service is ignored, but the broadcast signal transmitted by the layer of the existing terrestrial digital broadcast service is reproduced.

MPEG-2TS mode

The broadcasting system of the present embodiment can support the MPEG-2TS employed in the existing terrestrial digital broadcasting service and the like as a media transmission method for transmitting data such as video and audio. Specifically, the stream transmitted by the OFDM transmission wave of fig. 4D (1) is an MPEG-2TS, and the stream transmitted by the layer transmitting the existing terrestrial digital broadcasting service in the OFDM transmission waves of fig. 4D (2) and fig. 4D (3) is an MPEG-2TS. The stream obtained by demodulating the transmission wave by the first modem 130C of the broadcast receiving apparatus 100 of fig. 2 is an MPEG-2TS. In addition, the stream corresponding to the layer transmitting the existing terrestrial digital broadcasting service among the streams obtained by demodulating the transmission wave by the second modem 130T is the MPEG-2TS. Similarly, the stream corresponding to the layer transmitting the existing terrestrial digital broadcasting service among the streams obtained by demodulating the transmission wave by the third modem 130L is the MPEG-2TS.

The MPEG-2TS is characterized in that components such as video and audio constituting a program are multiplexed in 1 packet stream together with a control signal and a clock. Since it includes processing as 1 packet stream with a clock, it is suitable to transmit 1 content with 1 channel ensuring transmission quality, and is employed in most of the existing digital broadcasting systems. Further, it is possible to realize bidirectional communication via a bidirectional network such as a fixed network and a mobile network, and it is possible to support a broadcast communication cooperation system that combines a digital broadcast service with a function of utilizing a broadband network, an arithmetic processing in a server apparatus that acquires additional content via the broadband network, a presentation processing performed by cooperation with a mobile terminal device, and the like.

Fig. 9A shows an example of a protocol stack of a transmission signal in a broadcast system using an MPEG-2 TS. In MPEG-2TS, PSI and SI, other control signals, etc., are transmitted in a section format.

[ control Signal of broadcasting System Using MPEG-2TS System ]

As control information of the MPEG-2TS system, there are mainly a table used for program arrangement information and a table used for other than program arrangement information. The table is transmitted in a section format and the descriptors are arranged in the table.

< Table used in program arrangement information >)

Fig. 9B shows a list of tables used for program arrangement information of the MPEG-2TS broadcasting system. In the present embodiment, the table shown below is used as the table used in the program arrangement information.

(1)PAT(Program Association Table)

(2)CAT(Conditional Access Table)

(3)PMT(Program Map Table)

(4)NIT(Network Information Table)

(5)SDT(Service Description Table)

(6)BAT(Bouquet Association Table)

(7)EIT(Event Information Table)

(8)RST(Running Status Table)

(9)TDT(Time and Date Table)

(10)TOT(Time Offset Table)

(11)LIT(Local Event Information Table)

(12)ERT(Event Relation Table)

(13)ITT(Index Transmission Table)

(14)PCAT(Partial Content Announcement Table)

(15)ST(Stuffing Table)

(16)BIT(Broadcaster Information Table)

(17)NBIT(Network Board Information Table)

(18)LDT(Linked Description Table)

(19)AMT(Address Map Table)

(20)INT(IP/MAC Notification Table)

(21) List of operator settings

< Table used in digital broadcasting >)

Fig. 9C shows a list of tables used for broadcasting systems of the MPEG-2TS system other than program arrangement information. In the present embodiment, as a table used in addition to the program arrangement information, the following table is used.

(1)ECM(Entitlement Control Message)

(2)EMM(Entitlement Management Message)

(3)DCT(Download Control Table)

(4)DLT(Download Table)

(5)DIT(Discontinuity Information Table)

(6)SIT(Selection Information Table)

(7)SDTT(Software Download Trigger Table)

(8)CDT(Common Data Table)

(9) DSM-CC section

(10)AIT(Application Information Table)

(11)DCM(Download Control Message)

(12)DMM(Download Management Message)

(13) List of operator settings

Descriptor used in program arrangement information

Fig. 9D, 9E, and 9F show a list of descriptors used for program arrangement information of an MPEG-2TS broadcasting system. In the present embodiment, as a descriptor used in the program arrangement information, a descriptor shown below is used.

(1) Conditional access mode descriptor (Conditional Access Descriptor)

(2) Copyright descriptor (Copyright Descriptor)

(3) Network name descriptor (Network Name Descriptor)

(4) Service list descriptor (Service List Descriptor)

(5) Fill descriptor (Stuffing Descriptor)

(6) Satellite distribution system descriptor (Satellite Delivery System Descriptor)

(7) Ground distribution system descriptor (Terrestrial Delivery System Descriptor)

(8) Service group name descriptor (Bouquet Name Descriptor)

(9) Service descriptor (Service Descriptor)

(10) Whether each country can receive descriptor (Country Availability Descriptor)

(11) Link descriptor (Linkage Descriptor)

(12) NVOD reference service descriptor (NVOD Reference Descriptor)

(13) Time shift service descriptor (Time Shifted Service Descriptor)

(14) Short format event descriptor (Short Event Descriptor)

(15) Extended format event descriptor (Extended Event Descriptor)

(16) Time shift event descriptor (Time Shifted Event Descriptor)

(17) Component descriptor (Component Descriptor)

(18) Mosaic descriptor (Mosaic Descriptor)

(19) Flow identification descriptor (Stream Identifier Descriptor)

(20) CA recognition descriptor (CA Identifier Descriptor)

(21) Content descriptor (Content Descriptor)

(22) Parental control level descriptor (Parental Rating Descriptor)

(23) Layered transmission descriptor (Hierarchical Transmission Descriptor)

(24) Digital copy control descriptor (Digital Copy Control Descriptor)

(25) Emergency information descriptor (Emergency Information Descriptor)

(26) Data coding mode descriptor (Data Component Descriptor)

(27) System management descriptor (System Management Descriptor)

(28) Local time offset descriptor (Local Time Offset Descriptor)

(29) Sound component descriptor (Audio Component Descriptor)

(30) Object region descriptor (Target Region Descriptor)

(31) Hyperlink descriptors (Hyperlink Descriptor)

(32) Data content descriptor (Data Content Descriptor)

(33) Video decoding control descriptor (Video Decode Control Descriptor)

(34) Basic local event descriptor (Basic Local Event Descriptor)

(35) Reference descriptor (Reference Descriptor)

(36) Node relation descriptor (Node Relation Descriptor)

(37) Short format node information descriptor (Short Node Information Descriptor)

(38) STC reference descriptor (STC Reference Descriptor)

(39) Partial receive descriptor (Partial Reception Descriptor)

(40) Series descriptor (Series Descriptor)

(41) Event group descriptor (Event Group Descriptor)

(42) SI transmission parameter descriptor (SIParameter Descriptor)

(43) Broadcast trader name descriptor (Broadcaster Name Descriptor)

(44) Component group descriptor (Component Group Descriptor)

(45) SI main TS descriptor (SIPrime TSDescriptor)

(46) Bulletin board information descriptor (Board Information Descriptor)

(47) LDT link descriptor (LDT Linkage Descriptor)

(48) Connection transmission descriptor (Connected Transmission Descriptor)

(49) TS information descriptor (TS Information Descriptor)

(50) Extended broadcaster descriptor (Extended Broadcaster Descriptor)

(51) Logo transmission descriptor (Logo Transmission Descriptor)

(52) Content usage descriptor (Content Availability Descriptor)

(53) Carousel compatible compound descriptor (Carousel Compatible Composite Descriptor)

(54) Conditional rendering mode descriptor (Conditional Playback Descriptor)

(55) AVC video descriptor (AVC Video Descriptor)

(56) AVC sequential HRD descriptor (AVC Timing and HRD Descriptor)

(57) Service group descriptor (Service Group Descriptor)

(58) MPEG-4 Audio descriptor (MPEG-4 Audio Descriptor)

(59) MPEG-4 Audio extension descriptor (MPEG-4 Audio Extension Descriptor)

(60) Registration descriptor (Registration Descriptor)

(61) Data broadcast identification descriptor (Data Broadcast Id Descriptor)

(62) Access control descriptor (Access Control Descriptor)

(63) Regional broadcast information descriptor (Area Broadcasting Information Descriptor)

(64) Material information descriptor (Material Information Descriptor)

(65) HEVC video descriptor (HEVC Video Descriptor)

(66) Layered coding descriptor (Hierarchy Descriptor)

(67) Communication collaboration information descriptor (Hybrid Information Descriptor)

(68) Scrambling mode descriptor (Scrambler Descriptor)

(69) Operator-set descriptors

Descriptor used in digital broadcasting

Fig. 9G shows a list of descriptors used in addition to program arrangement information of the MPEG-2TS broadcasting system. In the present embodiment, as a descriptor used in addition to program arrangement information, a descriptor shown below is used.

(1) Partial transport stream descriptor (Partial Transport Stream Descriptor)

(2) Network identification descriptor (Network Identification Descriptor)

(3) Partial transport stream time descriptor (Partial Transport Stream Time Descriptor)

(4) Download content descriptor (Download Content Descriptor)

(5) CA_EMM_TS_descriptor (CA EMM TSDescriptor)

(6) CA contract information descriptor (CA Contract Information Descriptor)

(7) CA service descriptor (CA Service Descriptor)

(8) Carousel identification descriptor (Carousel Identifier Descriptor)

(9) Association tag descriptor (Association Tag Descriptor)

(10) Expansion association tag descriptor (Deferred Association tags Descriptor)

(11) Network download content descriptor (Network Download Content Descriptor)

(12) Download protection descriptor (Download Protection Descriptor)

(13) CA start descriptor (CA Startup Descriptor)

(14) Operator-set descriptors

Descriptor used in INT

Fig. 9H shows a list of descriptors used in the INT of the MPEG-2TS broadcast system. In the present embodiment, as a descriptor used in INT, a descriptor shown below is used. The descriptors used in the program arrangement information and the descriptors used in the program arrangement information are not used in INT.

(1) Target smart card descriptor (Target Smartcard Descriptor)

(2) Target IP address descriptor (Target IP Address Descriptor)

(3) Target IPv6 address descriptor (Target IPv6 Address Descriptor)

(4) IP/MAC platform name descriptor (IP/MAC Platform Name Descriptor)

(5) IP/MAC platform provider name descriptor (IP/MAC Platform Provider Name Descriptor)

(6) IP/MAC flow configuration descriptor (IP/MAC Stream Location Descriptor)

(7) Operator-set descriptors

Descriptor used in AIT

Fig. 9I shows a list of descriptors used in the AIT of the MPEG-2TS broadcast system. In the present embodiment, as the descriptor used in the AIT, the following descriptor is used. The descriptors used in the program arrangement information and the descriptors used in the program arrangement information are not used in INT.

(1) Application descriptor (Application Descriptor)

(2) Transport protocol descriptor (Transport Protocol Descriptor)

(3) Simple application location descriptor (Simple Application Location Descriptor)

(4) Application boundary rights setting descriptor (Application Boundary and Permission Descriptor)

(5) Start priority information descriptor (Autostart Priority Descriptor)

(6) Cache information descriptor (Cache Control Info Descriptor)

(7) Random application delay descriptor (Randomized Latency Descriptor)

(8) External application control descriptor (External Application Control Descriptor)

(9) Video reproduction application descriptor (Playback Application Descriptor)

(10) Simple video reproduction application location descriptor (Simple Playback Application Location Descriptor)

(11) Application expiration descriptor (Application Expiration Descriptor)

(12) Operator-set descriptors

[ MMT method ]

The broadcasting system according to the present embodiment can also support the MMT system as a media transmission system for transmitting data such as video and audio. Specifically, in the OFDM transmission waves of fig. 4D (2) and fig. 4D (3), the stream transmitted by the layer transmitting the advanced terrestrial digital broadcasting service is basically the MMT system. In addition, the mode of a stream corresponding to a layer transmitting an advanced terrestrial digital broadcasting service among streams obtained by demodulating a transmission wave by the second modem 130T of the broadcast receiving apparatus 100 of fig. 2 is in principle MMT. Similarly, the third modem 130L demodulates the transmission wave to obtain a stream corresponding to a layer transmitting the advanced terrestrial digital broadcasting service, and the stream is basically MMT. In addition, as a modification, the MPEG-2TS stream may be applied to an advanced terrestrial digital broadcasting service. The stream demodulated by the fourth modem 130B is MMT.

The MMT system is a newly established media transmission system because there is a limit to the function of the environment-changing MPEG-2TS system concerning content distribution, such as content diversity, device diversity using content, channel diversity of distribution content, and content accumulation environment diversity in recent years.

The video signal and audio signal of the broadcast program are coded and converted to MFU (Media Fragment Unit)/MPU (Media Processing Unit), and the coded signals are loaded into MMTP (MMT Protocol) to be MMTP packetized and transmitted in IP packets. In addition, the data content and caption signals related to the broadcast program are also converted into MFU/MPU format, and are loaded with MMTP payload to perform MMTP packetization and transmitted in IP packets.

For transmission of MMTP packets, UDP/IP (User Datagram Protocol/Internet Protocol) is used in the broadcast channel and UDP/IP or TCP/IP (Transmission Control Protocol/Internet Protocol) is used in the communication line. In addition, in the broadcast channel, a TLV multiplexing method may be used for efficiently transmitting IP packets.

The protocol stack of the MMT in the broadcast channel is shown in fig. 10A. In addition, a protocol stack of MMT in the communication line is shown in fig. 10B. In the MMT scheme, a mechanism for transmitting both MMT-SI and TLV-SI control information is prepared. The MMT-SI is control information indicating the structure of a broadcast program, etc. The control message is converted into the MMT control message format, MMTP load is loaded to carry out MMTP packetization, and IP packet transmission is carried out. The TLV-SI is control information on multiplexing of IP packets, providing information for channel selection and corresponding information of IP addresses and services.

[ control Signal of broadcasting System Using MMT System ]

As described above, in the MMT scheme, TLV-SI and MMT-SI are prepared as control information. The TLV-SI consists of tables and descriptors. The table is transmitted in a section format and the descriptors are arranged in the table. The MMT-SI is composed of three layers, a message holding a table and a descriptor, a table having elements and attributes representing specific information, and a descriptor representing more detailed information.

< Table used in TLV-SI >)

Fig. 10C shows a list of tables used in TLV-SI of the MMT broadcast system. In the present embodiment, the table shown below is used as the table of TLV-SI. Further, a table synonymous with the tables shown in fig. 9B and 9C may be used.

(1) Network information table for TLV (Network Information Table for TLV)

(2) Address mapping table (Address Map Table)

(3) List of operator settings

Descriptor used in TLV-SI

Fig. 10D shows a list of descriptors used in TLV-SI of the MMT broadcast system. In the present embodiment, as the descriptor of TLV-SI, the following descriptor is used. Further, descriptors synonymous with the respective descriptors shown in fig. 9D, 9E, 9F, 9G, 9H, and 9I may be used.

(1) Service list descriptor (Service List Descriptor)

(2) Satellite distribution system descriptor (Satellite Delivery System Descriptor)

(3) System management descriptor (System Management Descriptor)

(4) Network name descriptor (Network Name Descriptor)

(5) Remote control key descriptor (Remote Control Key Descriptor)

(6) Operator-set descriptors

Message used in MMT-SI

Fig. 10E shows a list of messages used in MMT-SI of the MMT broadcasting system. In this embodiment, the following message is used as the message of the MMT-SI.

(1) PA (Package Access) message

(2) M2 section message

(3) CA message

(4) M2 short message

(5) Data transfer message

(6) Operator-set message

< Table used in MMT-SI >)

Fig. 10F shows a list of tables used in MMT-SI of the MMT broadcasting system. In this embodiment, the table shown below is used as the table of MMT-SI. Further, a table synonymous with the tables shown in fig. 9B and 9C may be used.

(1)MPT(MMT Package Table)

(2)PLT(Package List Table)

(3)LCT(Layout Configuration Table)

(4)ECM(Entitlement Control Message)

(5)EMM(Entitlement Management Message)

(6)CAT(MH)(Conditional Access Table(MH))

(7)DCM(Download Control Message)

(8)DMM(Download Management Message)

(9)MH-EIT(MH-Event Information Table)

(10)MH-AIT(MH-Application Information Table)

(11)MH-BIT(MH-Broadcaster Information Table)

(12)MH-SDTT(MH-Software Download Trigger Table)

(13)MH-SDT(MH-Service Description Table)

(14)MH-TOT(MH-Time Offset Table)

(15)MH-CDT(MH-Common Data Table)

(16)MH-DIT(MH-Discontinuity Information Table)

(17)MH-SIT(MH-Selection Information Table)

(18) DDM meter (Data Directory Management Table)

(19) DAM meter (Data Asset Management Table)

(20) DCC meter (Data Content Configuration Table)

(21)EMT(Event Message Table)

(22) List of operator settings

Descriptor used in MMT-SI

Fig. 10G, 10H, and 10I show a list of descriptors used in MMT-SI of an MMT broadcasting system. In the present embodiment, as a descriptor of MMT-SI, the following descriptor is used. Further, descriptors synonymous with the respective descriptors shown in fig. 9D, 9E, 9F, 9G, 9H, and 9I may be used.

(1) Resource group descriptor (Asset Group Descriptor)

(2) Event package descriptor (Event Package Descriptor)

(3) Background color specification descriptor (Background Color Descriptor)

(4) MPU presents region designation descriptor (MPU Presentation Region Descriptor)

(5) MPU timestamp descriptor (MPU Timestamp Descriptor)

(6) Dependency descriptor (Dependency Descriptor)

(7) Access control descriptor (Access Control Descriptor)

(8) Scrambling mode descriptor (Scrambler Descriptor)

(9) Message authentication mode descriptor (Message Authentication Method Descriptor)

(10) Emergency information descriptor (Emergency Information Descriptor)

(11) MH-MPEG-4 Audio descriptor (MH-MPEG-4 Audio Descriptor)

(12) MH-MPEG-4 audio expansion descriptor (MH-MPEG-4 Audio Extension Descriptor)

(13) MH-HEVC Descriptor (MH-HEVC Descriptor)

(14) MH-link descriptor (MH-Linkage Descriptor)

(15) MH-event group descriptor (MH-Event Group Descriptor)

(16) MH-service list descriptor (MH-Service List Descriptor)

(17) MH-short format event descriptor (MH-Short Event Descriptor)

(18) MH-extended format event descriptor (MH-Extended Event Descriptor)

(19) Image component descriptor (Video Component Descriptor)

(20) MH-flow identification descriptor (MH-Stream Identifier Descriptor)

(21) MH-content descriptor (MH-Content Descriptor)

(22) MH-parental control level descriptor (MH-Parental Rating Descriptor)

(23) MH-Sound component descriptor (MH-Audio Component Descriptor)

(24) MH-object region descriptor (MH-Target Region Descriptor)

(25) MH-series descriptor (MH-Series Descriptor)

(26) MH-SI transmission parameter descriptor (MH-SIParameter Descriptor)

(27) MH-broadcast trader name descriptor (MH-Broadcaster Name Descriptor)

(28) MH-service descriptor (MH-Service Descriptor)

(29) IP data flow descriptor (IP Data Flow Descriptor)

(30) MH-CA start descriptor (MH-CA Startup Descriptor)

(31) MH-Type Descriptor (MH-Type Descriptor)

(32) MH-Info Descriptor (MH-Info Descriptor)

(33) MH-Expire descriptor (MH-Expire Descriptor)

(34) MH-Compression Type descriptor (MH-Compression Type Descriptor)

(35) MH-data coding mode descriptor (MH-Data Component Descriptor)

(36) UTC-NPT reference descriptor (UTC-NPT Reference Descriptor)

(37) Event message descriptor (Event Message Descriptor)

(38) MH-local time offset descriptor (MH-Local Time Offset Descriptor)

(39) MH-component group descriptor (MH-Component Group Descriptor)

(40) MH-logo transmission descriptor (MH-Logo Transmission Descriptor)

(41) MPU extended time stamp descriptor (MPU Extended Timestamp Descriptor)

(42) MPU download content descriptor (MPU Download Content Descriptor)

(43) MH-network download content descriptor (MH-Network Download Content Descriptor)

(44) Application descriptor (MH-Application Descriptor)

(45) MH-transmission protocol descriptor (MH-Transport Protocol Descriptor)

(46) MH-simple application location descriptor (MH-Simple Application Location Descriptor)

(47) Application boundary rights setting descriptor (MH-Application Boundary and Permission Descriptor)

(48) MH-start priority information descriptor (MH-Autostart Priority Descriptor)

(49) MH-cache information descriptor (MH-Cache Control Info Descriptor)

(50) MH-random application delay descriptor (MH-Randomized Latency Descriptor)

(51) Link destination PU descriptor (Linked PU Descriptor)

(52) Lock cache assignment descriptor (Locked Cache Descriptor)

(53) Unlocking cache assignment descriptor (Unlocked Cache Descriptor)

(54) MH-download protection descriptor (MH-DL Protection Descriptor)

(55) Application service descriptor (Application Service Descriptor)

(56) MPU node descriptor (MPU Node Descriptor)

(57) PU structure descriptor (PU Structure Descriptor)

(58) MH-layered coding descriptor (MH-Hierarchy Descriptor)

(59) Content replication control descriptor (Content Copy Control Descriptor)

(60) Content usage control descriptor (Content Usage Control Descriptor)

(61) Emergency news descriptor (Emergency News Descriptor)

(62) MH-CA contract information descriptor (MH-CA Contract Info Descriptor)

(63) MH-CA service descriptor (MH-CA Service Descriptor)

(64) MH-external application control descriptor (MH-External Application Control Descriptor)

(65) MH-video reproduction application descriptor (MH-Playback Application Descriptor)

(66) MH-simple video reproduction application position descriptor (MH-Simple Playback Application Location Descriptor)

(67) MH-application expiration descriptor (MH-Application Expiration Descriptor)

(68) Related broadcasters descriptor (Related Broadcaster Descriptor)

(69) Multimedia service information descriptor (Multimedia Service Descriptor)

(70) MH-filling descriptor (MH-Stuffing Descriptor)

(71) MH-broadcast ID descriptor (MH-Broadcast ID Descriptor)

(72) MH-network identification descriptor (MH-Network Identification Descriptor)

(73) Operator-set descriptors

< relation between data Transmission and control information in MMT method >

Fig. 10J shows a relationship between data transmission and a representative table in the MMT broadcasting system.

In the broadcast system of the MMT system, data transmission can be performed by using a plurality of paths such as TLV streams via broadcast channels and IP data streams via communication lines. The TLV flow includes TLV-SI such as TLV-NIT and AMT, and IP packet data flow, i.e. IP data flow. The IP data stream includes video resources including a series of video MPUs and audio resources including a series of audio MPUs. Further, a caption resource including a series of caption MPUs, a superimposed character resource including a series of superimposed character MPUs, a data resource including a series of data MPUs, and the like may be included. The various resources are associated in packet units using MPTs (MMT packet tables) held and transmitted in PA messages. Specifically, the MPT may record a packet ID in association with a resource ID of each resource included in the packet.

The resources constituting the packet may be only resources in TLV streams, but may include resources transmitted by IP data streams of communication lines as shown in fig. 10J. This can be achieved by including the location information of each resource included in the packet in the MPT and making the broadcast receiving apparatus 100 aware of the reference destination of each resource. As the location information of each resource, it is possible to specify:

(1) Data multiplexed in the same IP data stream as MPT

(2) Data multiplexed in IPv4 data flows

(3) Data multiplexed in IPv6 data flows

(4) Data multiplexed in broadcast MPEG2-TS

(5) Data multiplexed in MPEG2-TS format within IP data streams

(6) Data located at designated URL

And the like, and various data transmitted by various transmission paths.

The MMT broadcasting system further has a concept of an event. An event is a concept representing a so-called program including MH-EIT processing sent in an M2 section message. Specifically, among packets indicated by the event packet descriptor stored in the MH-EIT, a series of data included in a period corresponding to a duration from a start time stored in the MH-EIT is data included in the concept of the event. The MH-EIT can be used in the broadcast receiving apparatus 100 for various processing (for example, processing for creating a program table, control of recording reservation and viewing reservation, and copyright management processing such as temporary accumulation) for each event unit.

[ channel setting Process of broadcast receiving apparatus ]

< initial scan >)

In the conventional terrestrial digital broadcasting, network IDs are different for transmission master units, and information of other stations is not generally described in NITs. Accordingly, the broadcast receiving apparatus 100 of the embodiment of the present invention having compatibility with respect to the existing terrestrial digital broadcasting needs to have a function of generating a service list (receivable frequency list) based on the service ID for the terrestrial digital broadcasting (advanced terrestrial digital broadcasting, or terrestrial digital broadcasting in which the advanced terrestrial digital broadcasting and the existing terrestrial digital broadcasting are simultaneously transmitted with different layers), searching (scanning) all receivable channels at the receiving site, and performing the service list with respect to the terrestrial digital broadcasting of the embodiment of the present invention. In an area where the same network ID can be received by different physical channels through the MFN (Multi Frequency Network: multi-frequency network), the operation may be performed so that a channel having a good C/N or BER (Bit Error Rate) is basically selected and stored in the service list.

In the advanced BS digital broadcast or the advanced CS digital broadcast received by the fourth modem 130B of the broadcast receiving apparatus 100 according to the embodiment of the present invention, the broadcast receiving apparatus 100 may acquire and store the service list stored in the TLV-NIT, and it is not necessary to generate the service list. Accordingly, with respect to the advanced BS digital broadcast or the advanced CS digital broadcast received by the fourth modem section 130B, an initial scan and a re-scan described later are not required.

< rescanning >

The broadcast receiving apparatus 100 according to the embodiment of the present invention has a rescanning function provided in the case of a new station setup, a new relay station setup, a change in reception location of a television receiver, and the like. When the set information is changed, the broadcast receiving apparatus 100 can notify the user of the message.

< action example at initial scan/rescanning >)

Fig. 11A shows an example of an operation sequence of the channel setting process (initial scan/rescan) of the broadcast receiving apparatus 100 according to the embodiment of the present invention. In addition, although an example in the case where the MPEG-2TS is used as the media transmission system is shown in the figure, the same processing is basically performed in the case where the MMT system is used.

In the channel setting process, first, the reception function control unit 1102 sets the living area (selects the area in which the broadcast receiving apparatus 100 is set) based on an instruction from the user (S101). In this case, the setting of the living area may be automatically performed based on the setting position information of the broadcast receiving apparatus 100 acquired by the predetermined process instead of the instruction of the user. As an example of the process of acquiring the installation position information, information may be acquired from a network to which the LAN communication unit 121 is connected, or information on the installation position may be acquired from an external device to which the digital interface unit 125 is connected. Next, an initial value of the frequency range of the scan is set, and the modulation/demodulation unit (described above without distinguishing the first modem unit 130C from the second modem unit 130T from the third modem unit 130L, hereinafter the same) instructs to perform modulation of the set frequency (S102).

The modem unit performs modulation based on the instruction (S103), and proceeds to the process of S104 when the frequency is successfully locked to the set frequency (S103: yes). If the lock is not successfully performed (no in S103), the process proceeds to S111. In the process of S104, C/N is checked (S104), and when C/N equal to or greater than a predetermined value is obtained (S104: yes), the process proceeds to S105, and a reception check process is performed. If the C/N is not equal to or greater than the predetermined value (S104: no), the process proceeds to S111.

In the reception confirmation process, the reception function control unit 1102 first acquires the BER of the received broadcast wave (S105). Next, by acquiring the NIT and comparing it, it is confirmed whether the NIT is valid data (S106). When the NIT acquired in the process of S106 is valid data, the reception function control unit 1102 acquires information such as the transport stream ID and the original network ID from the NIT. Further, distribution system information on physical conditions of the broadcast channel corresponding to each transport stream ID/original network ID is acquired from the terrestrial distribution system descriptor. In addition, a list of service IDs is obtained from the service list descriptor.

Next, the reception function control unit 1102 confirms whether or not the transport stream ID acquired in the processing of S106 has been acquired by confirming the service list stored in the reception device (S107). If the transport stream ID acquired in the process of S106 is not acquired (S107: no), various pieces of information acquired in the process of S106 are added to the service list in association with the transport stream ID (S108). When the transport stream ID acquired in the process of S106 is acquired (yes in S107), the BER acquired in the process of S105 is compared with the BER acquired in the acquisition of the transport stream ID described in the service list (S109). As a result, when the BER obtained in the process of S105 is better (yes in S109), the service list is updated with the various information obtained in the process of S106 (S110). If the BER obtained in the process of S105 is not more satisfactory (S109: no), the various information obtained in the process of S106 is discarded.

In the service list generation (addition/update) process, a remote control key ID may be acquired from the TS information descriptor, and a representative service and a remote control key may be associated for each transport stream. By this processing, a single-click channel selection described later can be realized.

Upon completion of the reception confirmation processing, the reception function control unit 1102 confirms whether or not the current frequency setting scans the final value of the frequency range (S111). If the current frequency setting is not the final value of the scanned frequency range (S111: NO), the frequency value set in the modem is increased (S112), and the processes of S103 to S110 are repeated. If the current frequency setting is the final value of the scanned frequency range (yes in S111), the process proceeds to S113.

In the process of S113, the service list generated (added/updated) by the above-described process is presented to the user as a result of the channel setting process (S113). If there is a remote control key repetition or the like, the user may be notified of the message, and a change in the remote control key setting or the like may be presented (S114). The service list generated and updated by the above-described processing is stored in a nonvolatile memory such as the ROM103 or the storage (accumulation) section 110 of the broadcast receiving apparatus 100.

Fig. 11B shows an example of the data structure of the NIT. "transmission_stream_id" in the figure corresponds to the above-described transport stream ID, and "original_network_id" corresponds to the original network ID. Fig. 11C shows an example of a data structure of the ground distribution system descriptor. "guard_interval" and "transmission_mode" and "frequency" in the figure and the like correspond to the above-described distribution system information. Fig. 11D shows an example of a data structure of the service list descriptor. "service_id" in the figure corresponds to the service ID described above. Fig. 11E shows an example of a data structure of the TS information descriptor. "remote_control_key_id" in the figure corresponds to the remote control key ID described above.

The broadcast receiving apparatus 100 may be controlled to appropriately change the frequency range of the scanning in accordance with the received broadcast service. For example, when the broadcast receiving apparatus 100 receives a broadcast wave of an existing terrestrial digital broadcast service, it is controlled to scan a frequency range of 470 to 770MHz (corresponding to 13 to 62ch of a physical channel). That is, the control is performed such that the initial value of the frequency range is set to 470 to 476MHz (center frequency 473 MHz), the final value of the frequency range is set to 764 to 770MHz (center frequency 767 MHz), and the frequency value of +6mhz is increased in the process of S112.

In addition, in the case where the broadcast receiving apparatus 100 receives a broadcast wave including an advanced terrestrial digital broadcast service, it is controlled to scan a frequency range of 470 to 1010MHz (because there is a possibility that the frequency conversion process shown in fig. 7D and the frequency conversion amplification process shown in fig. 8C are performed). That is, the control is performed such that the initial value of the frequency range is set to 470 to 476MHz (center frequency 473 MHz), the final value of the frequency range is set to 1004 to 1010MHz (center frequency 1007 MHz), and the frequency value of +6mhz is increased in the process of S112. Even when the broadcast receiving apparatus 100 receives the advanced terrestrial digital broadcast service, if it is determined that the frequency conversion process and the frequency conversion amplification process are not performed, the broadcast receiving apparatus may control to scan only the frequency range of 470 to 770 MHz. The selection control of the scanned frequency range can be performed by the broadcast receiving apparatus 100 based on the system identifier, the frequency conversion process identifier, and the like of the TMCC information.

In addition, for example, in the case where the broadcast system according to the embodiment of the present invention is configured as shown in fig. 7C, and the broadcast receiving apparatus 100 receives an advanced terrestrial digital broadcast service of a polarized wave dual-purpose transmission system, one of the tuning/detecting section 131H and the tuning/detecting section 131V may be used to scan a frequency range of 470 MHz to 770MHz, and the other may be used to scan a frequency range of 770MHz to 1010MHz (in the case where frequency conversion processing is performed on a transmission wave in the polarized wave detected by the tuning/detecting section of the other). If the system identifier and the frequency conversion processing identifier based on the TMCC information are controlled in this way, unnecessary scanning in the frequency range can be omitted, and the time required for channel setting can be reduced. In this case, the operation sequence of fig. 11A may be performed in parallel by both the tuning/detecting unit 131H and the tuning/detecting unit 131V, and the cycle of the frequency increase S112 in the operation sequence of fig. 11A may be synchronized. At this time, if the pair of horizontally polarized wave signals and vertically polarized wave signals transmitted on the same physical channel are received in parallel in the same time cycle in the cycle in which the frequency increases in the operation sequence of fig. 11A, the control information and the like inside the packet stream of the advanced terrestrial digital service transmitted on the pair of horizontally polarized wave signals and vertically polarized wave signals can be decoded and acquired in the cycle processing. This is preferable because scanning and service list generation can be efficiently performed.

Similarly, in the case of the broadcast receiving apparatus 100 having a so-called dual tuner structure (for example, a structure including a plurality of third modems 130L and a structure shown in fig. 8D) further including a plurality of modems (tuning/detecting units) in the structure shown in fig. 8B, and an advanced terrestrial digital broadcast service of the reception layer multiplexing transmission scheme, one of the dual tuners may be used to scan a frequency range of 470 to 770MHz, and the other may be used to scan a frequency range of 770 to 1010MHz (when frequency conversion amplification processing is performed). If the control is performed in this way, the time required for setting the frequency can be reduced in the same manner as described above.

As described in fig. 8A, 8B, and 8C, in the configuration shown in fig. 8B, the terrestrial digital broadcasting service transmitted by any one of the upper layer and the lower layer is the existing terrestrial digital broadcasting service. Therefore, for example, in the frequency range of 470 to 770MHz and the frequency range of 770 to 1010MHz, the first modem 130C may be used to scan the frequency range for transmitting the existing terrestrial digital broadcasting service, and the third modem 130L may be used to scan the other frequency range in parallel. In this case, the time required for channel setting can be reduced as in the case of the parallel scanning by the dual tuner of the third modem 130L. Whether the current terrestrial digital broadcasting service or the advanced terrestrial digital broadcasting service is transmitted in any one of the frequency range 470 to 770MHz and the frequency range 770 to 1010MHz can be recognized by referring to parameters (e.g., parameters of a system identifier) stored in the TMCC information by receiving the TMCC information transmitted in each frequency by the third modem 130L at 2 points, for example, at 470 to 476MHz (center frequency 473 MHz) and 770 to 776MHz (center frequency 773 MHz) in each 1 point before starting the operation sequence of initial scanning/rescanning.

In the advanced terrestrial digital broadcasting service of the polarized dual-purpose transmission system, for example, in the case of a channel of a broadcast program that is generally transmitted using both a horizontal polarized signal and a vertical polarized signal as in the case of a 4K broadcast program having a C layer shown in the hierarchical example (1) of fig. 7A, the same transmission ID is detected in a scan of both the frequency range of 470 to 770MHz and the frequency range of 770 to 1010MHz, but is recorded as 1 channel in the service list. In the case of a 2K broadcast program of layer B shown in the figure, when the same broadcast program is transmitted by layer B of a horizontally polarized signal and layer B of a vertically polarized signal, the same transmission ID may be stored in the service list as 1 channel even if the same transmission ID is detected. That is, in the case where the same broadcast program is transmitted in the same layer transmitted with different polarized waves, the combination is recognized as 1 channel, and is not recognized as a different channel. In this way, in the channel selection processing using the service list, it is possible to avoid confusion of the user or the like caused by the presence of identical broadcast programs in different channels.

In contrast, in the advanced terrestrial digital broadcasting service of the polarized dual-purpose transmission system, when different broadcasting programs are transmitted by using the B layer of the horizontally polarized signal and the B layer of the vertically polarized signal (when the B layer of the vertically polarized signal is regarded as the virtual D layer), the different broadcasting programs are stored in the service list as different channels. Whether or not the same broadcast program is transmitted using the B layer of the horizontally polarized signal and the B layer of the vertically polarized signal can be recognized by the broadcast receiving apparatus 100 by determining with reference to an additional hierarchical transmission identifier parameter or the like of the TMCC information.

[ channel selection processing of broadcast receiving apparatus ]

The broadcast receiving apparatus 100 according to the embodiment of the present invention has functions of single-press channel selection by a single-press key of a remote controller, channel up/down channel selection by a remote-controlled channel up/down key, direct channel selection by directly inputting a 3-bit number using a number key of the remote controller, and the like, as a function of program channel selection. These channel selection functions may be performed using information stored in the service list generated in the initial scan/rescan described above. After channel selection, information of the selected channel (3-bit number, sub-number, TS name, service name, logo, video resolution information (distinction of UHD, HD, or SD, etc.) whether video resolution up/down conversion is performed, the number of channels is counted, whether audio down-mixing is performed, etc.) is displayed by banner display or the like. Thus, the user can visually obtain the information of the channel after channel selection, and can confirm whether or not the desired channel is successfully selected. An example of the processing in each channel selection method is described below.

Processing example of single-press channel selection

(1) By pressing a single-press key of the remote controller, a service of "service_id" specified by "remote_control_key_id" is selected.

(2) And setting a final mode, and displaying channel information after channel selection.

Processing example of up-down channel selection by channel up-down key

(1) By pressing the channel up/down key of the remote controller, channel selection for direct channel selection is performed in 3-bit numbering order.

(1-1) when the up button is pressed, an upper adjacent service of the 3-bit number is selected. However, when the current value of the 3-bit number is the maximum value of the service list, the service of the minimum number is selected.

(1-2) in the case where the key is pressed, a lower adjacent service of the 3-bit number is selected. However, when the current value of the 3-bit number is the minimum value of the service list, the service of the number of the maximum value is selected.

Processing example of direct channel selection

(1) When the direct selection is selected, the state is set to wait for 3-bit number input.

(2-1) when the input of the 3-bit number is not completed within the predetermined time (5 seconds), the system returns to the normal mode and displays the channel information of the currently selected service.

(2-2) in the case where the input of the 3-bit number is completed, judging whether or not the channel exists in the service list of the receivable frequency list, and if not, displaying a message such as "the channel does not exist".

(3) And (3) channel selection processing is carried out under the condition that channels exist, a final mode is set, and channel information display after channel selection is carried out.

The channel selection operation is performed based on SI, and may have a function of displaying the message and notifying the user when it is determined that the broadcast is in the inactive state.

Remote controller of broadcasting receiver

Fig. 12A shows an example of an external view of a remote controller (remote controller) for inputting an operation instruction to the broadcast receiving apparatus 100 according to the embodiment of the present invention.

The remote controller 180R includes a power button 180R1 for turning ON/OFF (standby ON/OFF) the power of the broadcast receiving apparatus 100, a cursor button 180R2 for moving a cursor up, down, left, right, and left, a decision button 180R3 for deciding an item of a cursor position as a selected item, and a return button 180R4.

The remote controller 180R includes a network switching key (advanced terrestrial digital, advanced BS, CS) 180R5 for switching the broadcast network received by the broadcast receiving apparatus 100. In this figure, each network handover key is denoted as "advanced terrestrial", "terrestrial number", "advanced BS", "CS". The remote controller 180R includes single-press keys (1 to 12) 180R6 for single-press channel selection, channel up/down keys 180R7 for channel up/down channel selection, and numeric keys for inputting 3-digit numbers in direct channel selection. In the example shown in the figure, the numeric key is also used as the single-press key 180R6, and when the direct key 180R8 is pressed and then the single-press key 180R6 is operated, the 3-digit number can be input.

The remote controller 180R includes an EPG button 180R9 for displaying a program table and a menu button 180RA for displaying a system menu. Program listings and system menus can be manipulated in detail using cursor key 180R2 and decision key 180R3 and return key 180R 4.

The remote controller 180R includes a d-button 180RB for a data broadcast service, a multimedia service, and the like, a collaboration button 180RC for displaying a list of broadcast communication collaboration services and corresponding applications thereof, and a color button (blue, red, green, yellow) 180RD. In the data broadcasting service, the multimedia service, the broadcasting communication cooperation service, and the like, the cursor key 180R2 and the decision key 180R3 and the return key 180R4 and the color key 180RD can be operated in detail.

The remote controller 180R further includes a video button 180RE for selecting a video, a sound button 180RF for switching a sound ES or a bilingual, and a caption button 180RG for switching ON/OFF of a caption or switching a caption language. The remote controller 180R includes a volume button 180RH for increasing/decreasing the volume of the audio output and a mute button 180RI for switching ON/OFF of the audio output.

Processing example 1 of switching networks with advanced ground number keys

The remote controller 180R of the broadcast receiving apparatus 100 of the embodiment of the present invention is provided with "advanced terrestrial digital keys" and "advanced BS keys" and "CS keys" as the network switching keys 180R5. Here, in the case where the advanced terrestrial digital broadcasting service performs the synchronous broadcasting of the 4K broadcasting program and the 2K broadcasting program with different layers, for example, the "advanced terrestrial digital key" and the "terrestrial digital key" may be configured so that the 4K broadcasting program is preferentially selected when the channel is selected in a state where the "advanced terrestrial digital key" is pressed, and the 2K broadcasting program is preferentially selected when the channel is selected in a state where the "terrestrial digital key" is pressed. By performing the control in this way, for example, when there are many errors in the transmission wave of the 4K broadcast program in a situation where the 4K broadcast program can be received, it is possible to realize control such as forcibly selecting the 2K broadcast program by pressing the "terrestrial digital key". In addition, in the case where the synchronous broadcasting of the 4K broadcast program and the 2K broadcast program is performed by different layers, when there are many errors in the transmission wave of the 4K broadcast program in the case where the 4K broadcast program can be received, the 2K broadcast program (the synchronous broadcasting of the 4K broadcast program in the selection) can be selected even in the "advanced terrestrial digital key" pressed state.

< example of Screen display at station selection >)

As described above, the broadcast receiving apparatus 100 according to the embodiment of the present invention has a function of displaying information of a selected channel with a banner display or the like when channel selection is performed by single-press channel selection, channel up/down channel selection, direct channel selection or the like.

Fig. 12B shows an example of a banner display at the time of selecting a station. The banner display 192A1 is an example of a banner display that is displayed when a 2K broadcast program is selected, and may be, for example, a program name, a start time/end time of the program, a network type, a number of a direct channel selection key of a remote controller, a service logo, and a 3-bit number. The banner display 192A2 is an example of a banner display that is displayed when a 4K broadcast program is selected, and, for example, a mark indicating that the received program is a 4K broadcast program is further displayed in addition to the same pieces of information as the banner display 192 A1. In addition, when resolution conversion processing, downmix processing, or the like is performed, display indicating the message may be performed. In the example of the banner display 192A2, as an example, a down-conversion process from UHD resolution to HD resolution and a down-mixing process from 22.2ch to 5.1ch are shown.

In the broadcast receiving apparatus 100, by performing these displays, when the same content is broadcast simultaneously as a 2K broadcast program and a 4K broadcast program, which are different-quality broadcast programs, the user can appropriately know which broadcast program is being displayed.

According to the system of the advanced digital broadcasting service having some or all of the functions of the embodiments of the present invention described above, it is possible to provide a transmission technology and a reception technology of the advanced digital broadcasting service having more advanced functions in consideration of compatibility with existing digital broadcasting services. That is, a technique of better transmitting or receiving an advanced digital broadcasting service can be provided.

Example 2

Hereinafter, example 2 of the present invention will be described. The structure, processing, effect, and the like in this embodiment are the same as those in embodiment 1 unless otherwise specified. Therefore, the differences between the present embodiment and embodiment 1 will be mainly described below, and the description of the common points will be omitted as much as possible to avoid repetition.

In addition, the control process, the identification process, the determination process, and the like performed by the broadcast receiving apparatus 100 in the present embodiment are executed by the main control unit 101 in fig. 2A unless otherwise specified.

[ synchronous broadcasting Using the same physical channel ]

In the terrestrial digital broadcasting service of the present embodiment, synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service using the layer structure can be performed in the same physical channel. In the synchronous broadcast service, broadcast programs of the same content can be simultaneously transmitted with different resolutions. The transmission of the main control information when the above-described synchronous broadcasting is performed may be performed as follows. In the following description, the expression of "strong layer" and the expression of "strong layer" mean a layer using a relatively strong modulation scheme, and the expression of "weak layer" mean a layer using a relatively weak modulation scheme. The expression "middle layer" refers to a layer employing a modulation scheme weaker than the modulation scheme employed in the "strong layer" and stronger than the modulation scheme employed in the "weak layer".

(1) For NIT, both the 2K service and the 4K service are transmitted with the strongest layer.

For PAT, both for 2K services and for 4K services are transported with the 2K service layer.

Among the ESs specified by the PMT transmitted in the 4K service layer, the ESs related to only the 4K service is transmitted with the 4K service layer.

(2) For NIT, layer transport with strongest layer for 2K services, layer transport with 4K services for 4K services.

For PAT, with 2K service layer transport for 2K service, with 4K service layer transport for 4K service.

(3) For NIT, layer transport with strongest layer for 2K services, layer transport with 4K services for 4K services.

The ESs specified by the PMT transmitted in the 4K service layer are all transmitted with the 4K service layer.

Fig. 13A shows an example of a transmission structure of control information in a case where the transmission standard of main control information corresponds to (1) when synchronous broadcasting using the layer structure shown in (1) of fig. 7A or (2) of fig. 7J is performed with respect to the 2K broadcast service and the 4K broadcast service.

The transmission structure shown in fig. 13A is an example of a case where the synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service is performed in the layer shown in the layer example (1) of fig. 7A in the terrestrial digital broadcasting service using the polarized wave dual-purpose transmission scheme, or a case where the synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service is performed in the layer shown in the layer example (2) of fig. 7J in the terrestrial digital broadcasting service using the single-polarized wave transmission scheme, and is an example of a case where the partial receiving service is performed in the a layer (strong layer), the fixed receiving 2K broadcasting service is performed in the B layer (middle layer), and the fixed receiving 4K broadcasting service is performed in the C layer (weak layer).

In this case, NIT may be transmitted by layer a and PAT may be transmitted by layer B. The PMT may be transmitted mainly in the layer a of the PMT of the partial reception service, the layer B of the PMT of the 2K broadcast service, and the layer C of the PMT of the 4K broadcast service. In addition, in the partial reception service, the ES of the partial reception service may be transmitted using the a layer. In the 2K broadcast service, the layer B transmission for ES mainly relates to the 2K broadcast service, and the layer a refers to the ES of the partial reception service. In the 4K broadcast service, the C layer transmission for ES mainly relates to the 4K broadcast service, the ES reference a layer related to the partial reception service, and the ES reference B layer related to the 2K broadcast service.

By adopting such a control information transmission structure, service information on both the 2K broadcast service and the 4K broadcast service can be acquired by referring to only the a layer.

Fig. 13B shows an example of a transmission structure of control information in a case where the transmission standard of main control information corresponds to (2) above when synchronous broadcasting using the layer structure shown in (1) of fig. 7A or (2) of fig. 7J is performed with the 2K broadcast service and the 4K broadcast service.

The transmission structure shown in fig. 13B is an example of a case where the synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service is performed in the layer shown in the layer example (1) of fig. 7A in the terrestrial digital broadcasting service using the polarized wave dual transmission scheme, or a case where the synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service is performed in the layer shown in the layer example (2) of fig. 7J in the terrestrial digital broadcasting service using the single polarized wave transmission scheme, and is an example of a case where the partial receiving service is performed in the a layer (strong layer), the fixed receiving 2K broadcasting service is performed in the B layer (middle layer), and the fixed receiving 4K broadcasting service is performed in the C layer (weak layer).

In this case, the NIT for the 2K broadcast service may be transmitted in the a layer, and the NIT for the 4K broadcast service may be transmitted in the C layer. In addition, the PAT for the 2K broadcast service may be transmitted in the B layer, and the PAT for the 4K broadcast service may be transmitted in the C layer. The PMT may be transmitted mainly in the layer a of the PMT of the partial reception service, the layer B of the PMT of the 2K broadcast service, and the layer C of the PMT of the 4K broadcast service. In addition, in the partial reception service, the ES of the partial reception service may be transmitted using the a layer. In the 2K broadcast service, the layer B transmission for ES mainly relates to the 2K broadcast service, and the layer a refers to the ES of the partial reception service. In the 4K broadcast service, the C layer transmission for ES mainly relates to the 4K broadcast service, the ES reference a layer related to the partial reception service, and the ES reference B layer related to the 2K broadcast service.

By adopting such a control information transmission structure, in the case of a conventional broadcast receiving apparatus that does not support the 4K broadcast service, only the a layer and the B layer are referred to, and it is not necessary to obtain unnecessary information on the 4K broadcast service.

Fig. 13C shows an example of a transmission structure of control information in a case where the transmission standard of main control information corresponds to (3) above when synchronous broadcasting using the layer structure shown in (1) of fig. 7A or (2) of fig. 7J is performed for 2K broadcast service and 4K broadcast service.

The transmission configuration shown in fig. 13C is an example of a case where synchronous broadcasting of the 2K broadcast service and the 4K broadcast service is performed in the layer shown in the layer example (1) of fig. 7A in the terrestrial digital broadcast service using the polarized wave dual transmission scheme, or a case where synchronous broadcasting of the 2K broadcast service and the 4K broadcast service is performed in the layer shown in the layer example (2) of fig. 7J in the terrestrial digital broadcast service using the single polarized wave transmission scheme, and is an example of a case where a partial reception service is performed in the a layer (strong layer), a fixed reception 2K broadcast service is performed in the B layer (middle layer), and a fixed reception 4K broadcast service is performed in the C layer (weak layer).

In this case, the NIT for the 2K broadcast service may be transmitted in the a layer, and the NIT for the 4K broadcast service may be transmitted in the C layer. In addition, the PAT for the 2K broadcast service may be transmitted in the B layer, and the PAT for the 4K broadcast service may be transmitted in the C layer. The PMT may be transmitted mainly in the layer a of the PMT of the partial reception service, the layer B of the PMT of the 2K broadcast service, and the layer C of the PMT of the 4K broadcast service. In addition, in the partial reception service, the ES of the partial reception service may be transmitted using the a layer. In the 2K broadcast service, the layer B transmission for ES mainly relates to the 2K broadcast service, and the layer a refers to the ES of the partial reception service. In the 4K broadcast service, the ESs mainly related to the 4K broadcast service is transmitted by the C layer, and the a layer and the B layer are not referred to.

By adopting such a control information transmission structure, when a conventional broadcast receiving apparatus that does not support the 4K broadcast service is configured, information on the 2K broadcast service is acquired only by referring to the a layer and the B layer, and it is unnecessary to acquire unnecessary information on the 4K broadcast service, and when a broadcast receiving apparatus that supports the 4K broadcast service is configured to refer to the 4K broadcast service, information on the 4K broadcast service can be acquired only by referring to the C layer.

In the example of the transmission structure of the control information in fig. 13C, the same audio ES or the like is transmitted in each of the 4K broadcast service and the 2K broadcast service, and in this case, PIDs may be shared as shown in the figure, or different PIDs may be set.

Fig. 13D shows an example of a transmission structure of control information in a case where the transmission standard of the main control information corresponds to (1) above when synchronous broadcasting using the 2K broadcast service and the 4K broadcast service having the layer structure shown in fig. 8A is performed.

The transmission configuration shown in fig. 13D is an example of a case where, in the terrestrial digital broadcasting service using the Layer division multiplexing transmission scheme, synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service is performed in the Layer shown in fig. 8A, and is an example of a case where a partial receiving service is performed in an a Layer (strong Layer) of an Upper Layer (Upper Layer), a 2K broadcasting service for fixed reception is performed in a B Layer (middle Layer) of the Upper Layer, and a 4K broadcasting service for fixed reception is performed in a Lower Layer (Lower Layer).

In this case, NIT may be transferred by the upper layer a and PAT may be transferred by the upper layer B. The PMT may be transmitted mainly in the upper layer a of the PMT of the partial reception service, in the upper layer B of the PMT of the 2K broadcast service, and in the lower layer of the PMT of the 4K broadcast service. In addition, in the partial reception service, the transmission of the upper layer a for ES mainly relates to the partial reception service. In the 2K broadcast service, the upper layer B layer transmission for the ES of the 2K broadcast service is mainly involved, and the upper layer a is referred to for the ES of the partial reception service. In the 4K broadcast service, the lower layer transmission for the ES mainly relates to the 4K broadcast service, the upper layer a is referred to for the ES of the partial reception service, and the upper layer B is referred to for the ES of the 2K broadcast service.

In the lower layer, all segments may be used as a lower layer a layer transmission 4K broadcast service, or one segment may be used as a lower layer a layer transmission part reception service (may be the same as an upper layer part reception service), and the rest may be used as a lower layer B layer transmission 4K broadcast service.

By adopting such a control information transmission structure, service information on both the 2K broadcast service and the 4K broadcast service can be acquired by referring to only the upper layer a.

Fig. 13E shows an example of a transmission structure of control information in a case where the transmission standard of the main control information corresponds to (2) above when synchronous broadcasting using the 2K broadcast service and the 4K broadcast service having the layer structure shown in fig. 8A is performed.

The transmission configuration shown in fig. 13E is an example of a case where, in the terrestrial digital broadcasting service using the Layer division multiplexing transmission scheme, synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service is performed in the Layer shown in fig. 8A, and is an example of a case where a partial receiving service is performed in the a Layer (strong Layer) of the Upper Layer (Upper Layer), a 2K broadcasting service is performed for fixed reception in the B Layer (middle Layer) of the Upper Layer, and a 4K broadcasting service is performed for fixed reception in the Lower Layer (Lower Layer).

In this case, the NIT for the 2K broadcast service may be transmitted by the upper layer a, and the NIT for the 4K broadcast service may be transmitted by the lower layer. In addition, the PAT for the 2K broadcast service may be transmitted in the upper layer B layer, and the PAT for the 4K broadcast service may be transmitted in the lower layer. The PMT may be transmitted mainly in the upper layer a of the PMT of the partial reception service, in the upper layer B of the PMT of the 2K broadcast service, and in the lower layer of the PMT of the 4K broadcast service. In addition, in the partial reception service, the transmission of the upper layer a for ES mainly relates to the partial reception service. In the 2K broadcast service, the upper layer B layer transmission for the ES of the 2K broadcast service is mainly involved, and the upper layer a is referred to for the ES of the partial reception service. In the 4K broadcast service, the lower layer transmission for the ES mainly relates to the 4K broadcast service, the upper layer a is referred to for the ES of the partial reception service, and the upper layer B is referred to for the ES of the 2K broadcast service.

By adopting such a control information transmission structure, in the case of a conventional broadcast receiving apparatus that does not support the 4K broadcast service, only the upper layer is referred to, and it is unnecessary to acquire unnecessary information on the 4K broadcast service.

Fig. 13F shows an example of a transmission structure of control information in a case where the transmission standard of the main control information corresponds to (3) above when synchronous broadcasting using the 2K broadcast service and the 4K broadcast service having the layer structure shown in fig. 8A is performed.

The transmission configuration shown in fig. 13F is an example of a case where, in the terrestrial digital broadcasting service using the Layer division multiplexing transmission scheme, synchronous broadcasting of the 2K broadcasting service and the 4K broadcasting service is performed in the Layer shown in fig. 8A, and is an example of a case where a partial receiving service is performed in the a Layer (strong Layer) of the Upper Layer (Upper Layer), a 2K broadcasting service is performed for fixed reception in the B Layer (middle Layer) of the Upper Layer, and a 4K broadcasting service is performed for fixed reception in the Lower Layer (Lower Layer).

In this case, the NIT for the 2K broadcast service may be transmitted by the upper layer a, and the NIT for the 4K broadcast may be transmitted by the lower layer. In addition, the PAT for the 2K broadcast service may be transmitted in the upper layer B layer, and the PAT for the 4K broadcast service may be transmitted in the lower layer. The PMT may be transmitted mainly in the upper layer a of the PMT of the partial reception service, in the upper layer B of the PMT of the 2K broadcast service, and in the lower layer of the PMT of the 4K broadcast service. In addition, in the partial reception service, the transmission of the upper layer a for ES mainly relates to the partial reception service. In the 2K broadcast service, the upper layer B layer transmission for the ES of the 2K broadcast service is mainly involved, and the upper layer a is referred to for the ES of the partial reception service. In the 4K broadcast service, the ESs mainly related to the 4K broadcast service is transmitted by the lower layer, and the upper layer is not referred to.

By adopting such a control information transmission structure, when a conventional broadcast receiving apparatus does not support the 4K broadcast service, only the upper layer is referred to and information on the 2K broadcast service is acquired, and it is not necessary to acquire unnecessary information on the 4K broadcast service. Further, when the 4K broadcast service is referred to in the broadcast receiving apparatus supporting the 4K broadcast service, information on the 4K broadcast service can be acquired by referring to only the lower layer.

In the example of the transmission structure of the control information in fig. 13F, the same audio ES or the like is transmitted in each of the 4K broadcast service and the 2K broadcast service, and in this case, PIDs may be shared as shown in the figure, or different PIDs may be set.

Further, although an example of the transmission structure of the main control information using fig. 13A to 13F is shown in the case where the media transmission system of both the 2K broadcast service and the 4K broadcast service is the MPEG-2TS system, the same control information transmission structure can be adopted even if the media transmission system of the 4K broadcast service is the MMT system. In this case, each table arranged in the weak layer (layer C or lower layer) in the drawing can be replaced with each table prepared in the MMT standard, which is synonymous with the above-described table. For example, NIT, PAT, PMT, and the like in the MPEG-2TS system may be replaced with TLV-NIT, AMT, MPT, PLT, and the like in the MMT system.

The examples of the transmission structure of the main control information shown in fig. 13A to 13F can be applied not only to the case where the 4K broadcast service and the 2K broadcast service are synchronous services using the same physical channel, but also to the case where the 4K broadcast service and the 2K broadcast service are independent from each other.

[ channel setting Process of broadcast receiving apparatus in synchronous broadcast service ]

In the conventional terrestrial digital broadcasting, although the network ID is different from the transmission master unit, it is common that no information of other stations is recorded in NIT, in the case of performing the synchronous broadcasting service, the pair of information on the 2K broadcasting program and the pair of information on the 4K broadcasting program of the synchronous broadcasting service are recorded together in NIT or the like, whereby the processing efficiency can be improved in the channel scanning processing (initial scanning/rescanning) and the service list generation processing in the broadcast receiving apparatus 100.

Operation example 1 at initial scanning/rescanning

Fig. 14A and 14B show an example of an operation sequence of a channel setting process (initial scan/rescan) for a terrestrial digital broadcasting service including a synchronous broadcast in the broadcast receiving apparatus 100 according to the embodiment of the present invention. In addition, although an example is shown in the figure in which the MPEG-2TS system is used as the media transmission system for the 4K broadcast service, the same processing is basically performed in the case of the MMT system.

In the channel setting process, first, the reception function control unit 1102 sets the living area (selects the area in which the broadcast receiving apparatus 100 is set) based on an instruction from the user (S201). In this case, the setting of the living area may be automatically performed based on the setting position information of the broadcast receiving apparatus 100 acquired by the predetermined process instead of the instruction of the user. As an example of the process of acquiring the installation position information, information may be acquired from a network to which the LAN communication unit 121 is connected, or information on the installation position may be acquired from an external device to which the digital interface unit 125 is connected. Next, an initial value of the frequency range of the scanned 2K broadcast service is set, and the modem unit (described above without distinguishing the first modem unit 130C from the second modem unit 130T and the third modem unit 130L, the same applies hereinafter) instructs to perform modulation of the set frequency (S202).

The modem unit performs modulation based on the instruction (S203), and proceeds to the process of S204 when the frequency is successfully locked to the set frequency (S203: yes). If the lock is not successfully performed (S203: no), the process proceeds to S211. In the process of S204, C/N is checked (S204), and when C/N equal to or greater than a predetermined value is obtained (S204: yes), the process proceeds to the process of S205, and a reception check process (2K) is performed. If the C/N is not equal to or greater than the predetermined value (S204: no), the process proceeds to S211.

In the reception confirmation process (2K), the reception function control unit 1102 first acquires the BER of the received broadcast wave (S205). Next, by acquiring the NIT and comparing it, it is confirmed whether the NIT is valid data (S206). When the NIT acquired in the process of S206 is valid data, the reception function control unit 1102 acquires information such as the transport stream ID and the original network ID from the NIT. Further, distribution system information on physical conditions of the broadcast channel corresponding to each transport stream ID/original network ID is acquired from the terrestrial distribution system descriptor. In addition, a list of service IDs is obtained from the service list descriptor.

Next, the reception function control unit 1102 confirms whether or not the transport stream ID acquired in the processing of S206 has been acquired by confirming the service list (2K) stored in the reception device (S207). If the transport stream ID acquired in the process of S206 is not acquired (S207: no), various pieces of information acquired in the process of S206 are added to the service list (2K) in association with the transport stream ID (S208). When the transport stream ID acquired in the process of S206 is acquired (yes in S207), the BER acquired in the process of S205 is compared with the BER acquired in the acquisition of the transport stream ID described in the service list (S209). As a result, when the BER obtained in the process of S205 is better (yes in S209), the service list (2K) is updated with the various information obtained in the process of S206 (S210). If the BER obtained in the process of S205 is not more satisfactory (S209: no), the various information obtained in the process of S206 is discarded.

If the channel being referred to by modulation in the process of S203 is a channel for performing the synchronous broadcast service and the information on the 4K broadcast service is successfully acquired from the NIT being referred to in the process of S206, the process of S208 or the process of S210 performs the addition/update process of the service list (2K) simultaneously with the addition/update process of the service list (4K).

In addition, in the service list (2K) generation (addition/update) process, a remote control key ID may be acquired from the TS information descriptor, and a representative service for each transport stream may be associated with the remote control key. By this processing, single-click channel selection can be realized.

Upon completion of the reception confirmation processing (2K), the reception function control unit 1102 confirms whether or not the current frequency setting scans the final value of the frequency range of the 2K broadcast service (S211). If the current frequency setting is not the final value of the frequency range of the 2K broadcast service (S211: NO), the frequency value set in the modem unit is increased (S212), and the processing of S203 to S210 is repeated. If the current frequency setting is the final value of the frequency range of the scanned 2K broadcast service (yes in S211), the process proceeds to S221 in fig. 14B.

In the process of S221, information on the synchronized broadcast service is acquired (S221). Information on the synchronized broadcast service is described later. Next, an initial value of the frequency range of the scanned 4K broadcast service is set, and the modulation/demodulation unit instructs the modulation of the set frequency (S222).

Next, based on the information on the synchronized broadcast service acquired in the process of S221, a determination is made as to whether or not the 4K broadcast service transmitted in the physical channel of the frequency set in the process of S222 is synchronized with a certain channel of the 2K broadcast service acquired in the reception confirmation process (2K) shown in fig. 14A (S223), and if the result is synchronized (S223: yes), the process proceeds to the process of S232. If the broadcast is not synchronized (no in S223), the process proceeds to S224. That is, in the case where the 4K broadcast service transmitted on the physical channel of the frequency set in the process of S222 is the synchronous broadcast of the 2K broadcast service, the reception confirmation process (4K) described later is skipped, and in the case where the reception confirmation process (4K) is not the synchronous broadcast, the reception confirmation process is executed.

The modem unit performs modulation based on the instruction in the process of S222 (S224), and proceeds to the process of S225 when the set frequency is successfully locked (yes in S224). If the lock is not successfully performed (S224: no), the process proceeds to S232. In the process of S225, C/N is checked (S225), and when C/N equal to or greater than a predetermined value is obtained (S225: yes), the process proceeds to S226, and a reception check process (4K) is performed. If the C/N is not equal to or greater than the predetermined value (no in S225), the process proceeds to S232.

In the reception confirmation process (4K), the reception function control unit 1102 first acquires the BER of the received broadcast wave (S226). Next, by acquiring the NIT and comparing it, it is confirmed whether the NIT is valid data (S227). When the NIT acquired in the process of S227 is valid data, the reception function control unit 1102 acquires information such as the transport stream ID and the original network ID from the NIT. Further, distribution system information on physical conditions of the broadcast channel corresponding to each transport stream ID/original network ID is acquired from the terrestrial distribution system descriptor. In addition, a list of service IDs is obtained from the service list descriptor.

Next, the reception function control unit 1102 confirms whether or not the transport stream ID acquired in the processing of S227 has been acquired by confirming the service list (4K) stored in the reception apparatus (S228). If the transport stream ID acquired in the process of S227 is not acquired (S228: no), various pieces of information acquired in the process of S227 are added to the service list (4K) in association with the transport stream ID (S229). When the transport stream ID acquired in the process of S227 is acquired (yes in S228), the BER acquired in the process of S226 is compared with the BER acquired in the acquisition of the transport stream ID described in the service list (S230). As a result, when the BER obtained in the process of S226 is better (yes in S230), the service list (4K) is updated with the various information obtained in the process of S227 (S231). If the BER obtained in the process of S226 is not more satisfactory (S230: no), the various information obtained in the process of S227 is discarded.

In addition, in the service list (4K) generation (addition/update) process, a remote control key ID may be acquired from the TS information descriptor, and a representative service for each transport stream may be associated with the remote control key. By this processing, single-click channel selection can be realized.

Upon completion of the reception confirmation processing (4K), the reception function control unit 1102 confirms whether or not the current frequency setting scans the final value of the frequency range of the 4K broadcast service (S232). If the current frequency setting is not the final value of the frequency range of the scanned 4K broadcast service (S232: NO), the frequency value set in the modem unit is increased (S233), and the processing of S223 to S231 is repeated. If the current frequency setting is the final value of the frequency range of the scanned 4K broadcast service (yes in S232), the process proceeds to S234.

In the process of S234, the service list (2K) and the service list (4K) generated (added/updated) by the above-described process are combined to generate a service list (combination) (S234). Further, the generated service list (composition) is presented to the user as a result of the channel setting process (S235). If there is a remote control key repetition or the like, the user may be notified of the message, and a change in the remote control key setting or the like may be presented (S236). The service list (composition) generated by the above-described processing is stored in a nonvolatile memory such as the ROM103 or the storage (accumulation) section 110 of the broadcast receiving apparatus 100.

In addition, the processing of S221 and the processing of S223 are not necessary. That is, the processing of S224 to S233 may be performed for all physical channels in the frequency range of the 4K broadcast service, instead of the information acquisition processing for the synchronized broadcast service.

In addition, the presentation process of the service list (composition) as a result of the channel setting process performed in the process of S235, and the display process of the remote control key setting for changing the setting in the case where there is a remote control key repetition or the like performed in the process of S236 may display only information on the 2K broadcast service or only information on the 4K broadcast service in accordance with the setting that the internal setting of the broadcast receiving apparatus 100 is either one of the 2K broadcast service reception mode and the 4K broadcast service reception mode. That is, among the "terrestrial number" key and the "advanced terrestrial number" key of the network switching key 180R5 of the remote controller 180R, the key that has been pressed recently is the "terrestrial number" key, and when the internal setting of the broadcast receiving apparatus 100 is the 2K broadcast service reception mode, only information on the 2K broadcast service is displayed, and when the key that has been pressed recently is the "advanced terrestrial number" key, and when the internal setting of the broadcast receiving apparatus 100 is the 4K broadcast service reception mode, only information on the 4K broadcast service is displayed. Alternatively, the information on the 2K broadcast service and the information on the 4K broadcast service may be simultaneously displayed regardless of which of the 2K broadcast service reception mode and the 4K broadcast service reception mode is set in the internal setting of the broadcast receiving apparatus 100.

In addition, although the example of the channel setting processing of the broadcast receiving apparatus in the synchronized broadcast service of fig. 14A to 14B is shown in the case where the media transmission system of both the 2K broadcast service and the 4K broadcast service is the MPEG-2TS system, the same control information transmission structure can be adopted even if the media transmission system of the 4K broadcast service is the MMT system. In this case, each table referred to in the drawing can be replaced with each table prepared in the MMT standard, which is synonymous with each table described above. For example, NIT in MPEG-2TS mode may be replaced with TLV-NIT in MMT mode.

< information on synchronous broadcast service >)

In the case of performing synchronous broadcasting of the 2K broadcast service and the 4K broadcast service, the following descriptors are preferably arranged in at least one or both of the paired services of the synchronous broadcasting. By referring to the following descriptors in the process of S221 in fig. 14B, it is possible to determine whether or not the 4K broadcast service transmitted on the physical channel of the frequency set in the process of S222 is broadcast in synchronization with any one of the 2K broadcast services acquired in the reception confirmation process (2K) shown in fig. 14A in the process of S223.

Fig. 14C shows an example of a data structure of the service descriptor. Fig. 14D shows an example of a list of service type categories. The service descriptor is a descriptor included in the SDT, and a group channel name and its operator name are shown together with the service form category. The "service_type" in the data structure of the service descriptor is a parameter indicating the type of the service. In the case where the parameter is "0x03", it means a digital TV synchronization service which means that the service is a paired 2K broadcast service of synchronous broadcasting. In addition, when the parameter is "0xAE", it means that the service is an ultra-high definition 4K synchronization service which is a paired 4K broadcast service which is broadcast synchronously.

Fig. 14E shows an example of a data structure of the service packet descriptor. Fig. 14F shows an example of a list of service packet types. The service packet descriptor is a descriptor included in the NIT, and in the case where there is a relationship between a plurality of services, it means that the services are packetized. The "service_group_type" in the data structure of the service packet descriptor is a parameter indicating the type of service constituting the packet. If the parameter is "0x2", it means that the service is a broadcast synchronization service.

If these descriptors are referred to, the broadcast receiving apparatus 100 can learn that the service under reception is a synchronous broadcast service, and there is a pair of services of the service under reception. In addition, it is also possible to indicate that the service under reception is a synchronous broadcast service or a pair of services in which the service under reception exists, by a descriptor different from the above-described descriptor.

As an example of the use of control information such as these descriptors in the broadcast receiving apparatus 100, the following is given in addition to the channel setting process (initial scanning/rescanning) for the terrestrial digital broadcast service including the synchronous broadcast.

First, the broadcast receiving apparatus 100 may recognize whether or not synchronous broadcasting is performed in the physical channel currently being received, and the broadcast receiving apparatus 100 may determine whether or not control information indicating whether or not paired synchronous broadcasting of the 2K broadcast service is stored in the 4K broadcast service being received, thereby performing the recognition processing. Specifically, if the "service_type" of the service descriptor is "0xAE" indicating that the 4K broadcast service is a paired 4K broadcast service of the synchronous broadcast as opposed to the 2K broadcast service, the broadcast receiving apparatus 100 may determine that the synchronous broadcast is being performed on the physical channel currently being received. Alternatively, if "0x2" indicating that a plurality of services constitute a broadcast-type synchronization service exists in the "service_group_type" of the service packet descriptor, the broadcast receiving apparatus 100 may determine that synchronization broadcast is being performed on the physical channel currently being received. These two determinations may be combined to determine whether or not synchronous broadcasting is being performed in the physical channel.

Next, a process of determining a pair of services to be synchronously broadcast in the broadcast receiving apparatus 100 will be described. It has been described that the broadcast receiving apparatus 100 can recognize whether or not the synchronous broadcast is performed in the currently received physical channel by judging whether or not control information indicating the pair-wise synchronous broadcast of the 2K broadcast service transmitted in the same physical channel is held in the received 4K broadcast service. At this time, in the broadcast system of the present embodiment, when synchronous broadcasting of the 2K broadcast service and the 4K broadcast service is performed in the same physical channel, it is assumed that the 2K broadcast service transmitted in the same physical channel is limited to only 1 and the 4K broadcast service transmitted in the same physical channel is limited to only 1 application. If so, in the above-described identification process, only whether synchronous broadcasting is implemented in the currently received physical channel is identified, it is possible to determine a pair of 2K broadcasting service and 4K broadcasting service of synchronous broadcasting transmitted in the physical channel. That is, this identification process is an identification process of identifying a 4K broadcast service as one of a pair of synchronous broadcasts, regardless of a value indicated by "service_type" in a 2K broadcast service transmitted in the same physical channel, if the 4K broadcast service is identified as a pair of synchronous broadcasts based on identification information.

As another example of the identification process, it is also possible to perform a process of judging whether or not there is a 2K broadcast service in which identification information defined as the same or corresponding to "0x03", that is, "digital TV synchronization service", of the "service type" of the service descriptor exists in the 2K broadcast service transmitted in the same physical channel. In this case, when there is a 2K broadcast service in which "service_type" indicates "0x03", that is, "digital TV synchronization service", the 2K broadcast service is identified as one of a pair of synchronized broadcasts, and a 4K broadcast service in which "service_type" indicates "0xAE", that is, "ultra-high definition 4K synchronization service" is identified as the other of the pair of synchronized broadcasts. In this other processing example, even when a 4K broadcast service is present in the same physical channel, in which "service_type" indicates "0xAE", that is, "ultra-high definition 4K synchronization service", a certain problem may occur due to an error or a problem of processing by the sender, and a case may occur in which "service_type" indicates "0x01", that is, "digital TV service" is present in the 2K broadcast service, and "service_type" indicates "0x03", that is, "digital TV synchronization service" is not present in the 2K broadcast service. In this case, in the above-described other processing example, it can be recognized that the 4K broadcast service indicated by "service_type (service type)" indicates "0xAE", that is, "ultra-high definition 4K synchronization service", and the 2K broadcast service indicated by "service_type (service type)" indicates "0x01", that is, "digital TV service", are not a pair of synchronous broadcasts. (the result of this identification can be regarded as an identification result of a paired 2K broadcast service determined that the paired 2K broadcast service is not found as opposed to the 4K broadcast service of the "ultra high definition 4K synchronization service")

The broadcast receiving apparatus 100 described above is used to identify whether or not the process of synchronous broadcasting is performed and/or to identify a pair of services of synchronous broadcasting, and information on whether or not synchronous broadcasting is performed and/or information on a pair of services of synchronous broadcasting is included in the service list together with or in the synthesized service list, and is stored in a nonvolatile memory such as the ROM103 and the storage (accumulation) unit 110 for each service stored in the service list. By using the information stored by identifying whether the processing of the synchronized broadcast is performed and/or the processing of the paired service of the determined synchronized broadcast is performed and/or the information of the paired service of the determined synchronized broadcast, the broadcast receiving apparatus 100 can execute the processing of the paired service of the synchronized broadcast in the program information (EPG information) on EIT or the like in the above-described [ acquisition processing of program information ] of the present embodiment. Also, by using the information on whether or not the synchronized broadcast is implemented, and/or the information on the paired services that determine the synchronized broadcast, the broadcast receiving apparatus 100 can perform the display control of the EPG screen for the paired services of the synchronized broadcast in the above-described [ display example of the EPG screen at the time of synchronized broadcast ] of the present embodiment.

Example 2 of operation at initial Scan/rescan

Fig. 14G shows an example of a different operation sequence of the broadcast receiving apparatus 100 according to the embodiment of the present invention from the above-described operation sequence of the channel setting process (initial scan/rescan) for the terrestrial digital broadcasting service including the synchronized broadcast.

This operation example is an operation example in the case of the configuration in fig. 2A in which the digital broadcast wave of the advanced terrestrial digital broadcast service received by the polarized dual-purpose terrestrial digital broadcast receiving antenna 200T and the single-polarized terrestrial digital broadcast receiving antenna (not shown) is distributed after being input to the broadcast receiving apparatus 100, and is input to the first modem 130C and the second modem 130T. In addition, the operation example in the case where the digital broadcast wave of the advanced digital terrestrial broadcast service received by the layer division multiplexing digital terrestrial broadcast receiving antenna 200L is distributed after being input to the broadcast receiving apparatus 100 and is input to the first modem 130C and the third modem 130L is also shown in fig. 2A. The present operation example is an example in which a plurality of modems (the first modem 130C and the second modem 130T, or the first modem 130C and the third modem 130L) are simultaneously controlled to simultaneously perform channel setting (scanning) for the 2K broadcast service and channel setting (scanning) for the 4K broadcast service.

In addition, although an example is shown in the figure in which the MPEG-2TS system is used as the media transmission system for the 4K broadcast service, the same processing is basically the same in the case of the MMT system.

In the channel setting process, first, the reception function control unit 1102 sets the living area (selects the area in which the broadcast receiving apparatus 100 is set) based on an instruction from the user (S301). In this case, the setting of the living area may be automatically performed based on the setting position information of the broadcast receiving apparatus 100 acquired by the predetermined process instead of the instruction of the user. As an example of the process of acquiring the installation position information, information may be acquired from a network to which the LAN communication unit 121 is connected, or information on the installation position may be acquired from an external device to which the digital interface unit 125 is connected. Next, an initial value of the frequency range of the scanned 2K broadcast service is set, and the first modem 130C is instructed to modulate the set frequency (S302). At the same time, an initial value of the frequency range of the scanned 4K broadcast service is set, and the second modem 130T (or the third modem 130L) is instructed to modulate the set frequency (S312).

The first modem 130C performs modulation based on the instruction (S303), and if the frequency is successfully locked to the set frequency (S303: yes), the process proceeds to S304. If the lock is not successfully performed (S303: no), the process proceeds to S306. In the process of S304, C/N is checked (S304), and when C/N equal to or greater than a predetermined value is obtained (S304: yes), the process proceeds to S305, and a reception check process (2K) is performed. If the C/N is not equal to or greater than the predetermined value (S304: no), the process proceeds to S306. In the reception confirmation process (2K), the same processes as S205 to S210 of the flowchart shown in fig. 14A are performed.

On the other hand, the second modem 130T (or the third modem 130L) also performs modulation based on the instruction (S313), and if the set frequency is successfully locked (S313: yes), the process proceeds to S314. If the lock is not successfully performed (S313: no), the process proceeds to S316. In the process of S314, C/N is checked (S314), and when C/N equal to or greater than a predetermined value is obtained (S314: yes), the process proceeds to S315, and a reception check process (4K) is performed. If the C/N is not equal to or greater than the predetermined value (S314: no), the process proceeds to S316. In the reception confirmation process (4K), the same processes as S226 to S231 of the flowchart shown in fig. 14B are performed.

Upon completion of the reception confirmation processing (2K), the reception function control unit 1102 confirms whether or not the current frequency setting in the first modem unit 130C scans the final value of the frequency range of the 2K broadcast service (S306). If the current frequency setting is not the final value of the frequency range of the scanned 2K broadcast service (S306: no), the frequency value set in the first modem 130C is increased (S327), and the processing of S303 to S305 is repeated. If the current frequency setting is the final value of the frequency range of the scanned 2K broadcast service (yes in S306), the process proceeds to S338.

On the other hand, when the reception check processing (4K) is completed in the second modem 130T (or the third modem 130L), the reception function control unit 1102 checks whether or not the current frequency setting scans the final value of the frequency range of the 4K broadcast service (S316). If the current frequency setting is not the final value of the frequency range of the scanned 4K broadcast service (S316: no), the frequency value set in the second modem 130T (or the third modem 130L) is increased (S327), and the processing of S313 to S315 is repeated. If the current frequency setting is the final value of the frequency range of the scanned 4K broadcast service (yes in S306), the process proceeds to S338.

In the process of S338, the service list (2K) generated (added/updated) by the reception confirmation process (2K) of S305 and the service list (4K) generated (added/updated) by the reception confirmation process (4K) of S315 are combined to generate a service list (combination) (S338). Further, the generated service list (composition) is presented to the user as a result of the channel setting process (S339). If there is a remote control key repetition or the like, the user may be notified of the message, and a change in the remote control key setting or the like may be presented (S340). The service list (composition) generated by the above-described processing is stored in a nonvolatile memory such as the ROM103 or the storage (accumulation) section 110 of the broadcast receiving apparatus 100.

In this case, as in the operation example 1, the information on whether or not the synchronous broadcast is performed and/or the information on the paired services for which the synchronous broadcast is determined are stored in the nonvolatile memory such as the ROM103 and the storage (accumulation) unit 110 for each service stored in the service list, together with or included in the synthesized service list, by using the process for identifying whether or not the synchronous broadcast is performed and/or the process for identifying the paired services for which the synchronous broadcast is performed. The same as in the above-described operation example 1 can be used for the EPG-related process using the stored information on whether or not the synchronized broadcast is executed and/or the information on the paired services for which the synchronized broadcast is specified.

According to the initial scanning/rescanning operation sequence of the operation example of fig. 14G, by performing the scanning process by parallel processing with each of the plurality of different modems, the service list of 2K and the service list of 4K can be added/updated by parallel processing, and therefore, the time for acquiring the synthesized service list can be shortened as compared with the initial scanning/rescanning operation sequence of fig. 14A and 14B.

Processing example 2 of switching networks with advanced ground number keys

The remote controller 180R of the broadcast receiving apparatus 100 of the embodiment of the present invention is provided with "advanced terrestrial digital key", "advanced BS key", "BS key", and "CS key", as the network switching key 180R5. In embodiment 1, an example of a process of switching networks using the "advanced terrestrial digital key" is described (processing example 1).

Fig. 15 shows an example of a more detailed operation sequence of the network switching process of the broadcast receiving apparatus 100 in the case where the network switching key of the remote controller 180R is pressed according to the embodiment of the present invention.

In the example of fig. 15, in the broadcast receiving apparatus 100, the case where the "terrestrial digital key" of the remote controller 180R is pressed when the advanced terrestrial digital broadcasting service is being received and displayed, that is, the case where an attempt is made to switch from receiving and displaying the advanced terrestrial digital broadcasting service to receiving and displaying the terrestrial digital broadcasting service, is an example of the start point of the present figure. In the broadcast receiving apparatus 100, the case where the "advanced terrestrial digital key" of the remote controller 180R is pressed when the terrestrial digital broadcast service is being received and displayed, that is, the case where an attempt is made to switch from receiving and displaying the terrestrial digital broadcast service to receiving and displaying the advanced terrestrial digital broadcast service, is another example of the start point of the present figure. That is, the sequence of actions of fig. 15 can be applied to any switching in the case where the reception and display of the advanced terrestrial digital broadcasting service and the reception and display of the terrestrial digital broadcasting service in the broadcast receiving apparatus 100 are switched to each other by pressing the "terrestrial digital key" or the "advanced terrestrial digital key" of the remote controller 180R.

First, with reference to fig. 15, an example will be described in which a "terrestrial digital key" of the remote controller 180R is pressed in a case where an advanced terrestrial digital broadcasting service is being received and displayed in the broadcast receiving apparatus 100, that is, an attempt is made to switch from receiving and displaying the advanced terrestrial digital broadcasting service to receiving and displaying the terrestrial digital broadcasting service.

In the broadcast receiving apparatus 100, in the case where a program of one service of the advanced terrestrial digital broadcasting service is being received and displayed, in the case where the "terrestrial digital key" of the remote controller 180R is pressed, the broadcast receiving apparatus 100 confirms whether or not a service or program as synchronous broadcasting exists in the terrestrial digital broadcasting for the advanced terrestrial digital broadcasting service or the program thereof being received and displayed (S1501). Whether or not there is a service or program that is synchronized broadcast, a determination may be made based on the identification of whether or not synchronized broadcast is performed, and based on the result of the identification, together with the service list or including information stored in the service list whether or not synchronized broadcast is performed.

Here, in S1501, when it is determined that there is no service or program as synchronous broadcast in the terrestrial digital broadcast with respect to the advanced terrestrial digital broadcast service or the program thereof received and displayed before the "terrestrial digital key" is pressed, the service (corresponding to the service called the last memory channel) stored in the nonvolatile memory such as the ROM103 and the storage (accumulation) unit 110 when the program of the terrestrial digital broadcast service was last received and displayed is set as a channel selection target after the network switching, and the program currently being broadcast in the service is received (S1502) and displayed (S1504). S1502 is a general process of network switching processing in the conventional broadcast receiving apparatus.

In contrast, in S1501, when it is determined that there is a service or program as a synchronous broadcast in the terrestrial digital broadcast with respect to the advanced terrestrial digital broadcast service or program thereof received and displayed before the "terrestrial digital key" is pressed, the service or program as a synchronous broadcast in the terrestrial digital broadcast which is determined to be present as a synchronous broadcast in S1501 is not the service corresponding to the so-called last memory channel but the service or program as a synchronous broadcast in the terrestrial digital broadcast which is determined to be present as a synchronous broadcast in S1501 is set as a channel selection target after the network switching, and the program currently being broadcast in the service is received (S1503) and displayed (S1504). In this case, the channel selection target after the network switching may be determined based on the determination processing for determining the pair of services to be synchronously broadcast and the information for determining the pair of services to be synchronously broadcast stored in the service list together with the service list or included in the service list based on the result of the determination processing. That is, even if a service (corresponding to a service called a last memory channel) in which a program of the terrestrial digital broadcasting service was last received and displayed has been stored in the nonvolatile memory such as the ROM103 and the storage (accumulation) section 110 at the time point of S1501, the service is ignored, and a program of the synchronous broadcast in the terrestrial digital broadcasting is preferentially received and displayed. Thus, the broadcast receiving apparatus 100 can perform channel selection by the conventional network switching process when there is no synchronized broadcast program of a program viewed by the user at the time point when the "terrestrial digital key" is pressed, and provide the user with channel selection by the network switching process which is the same as the conventional one, and the broadcast receiving apparatus 100 can realize appropriate network switching process for ensuring continuity of viewing by the user by selecting channels to the synchronized broadcast program and shifting the display screen when there is a synchronized broadcast program of a program viewed by the user at the time point when the "terrestrial digital key" is pressed.

Next, with the same fig. 15, an example will be described in which the "advanced terrestrial digital key" of the remote controller 180R is pressed in the case where the terrestrial digital broadcasting service is being received and displayed in the broadcast receiving apparatus 100, that is, an attempt is made to switch from receiving and displaying the terrestrial digital broadcasting service to receiving and displaying the advanced terrestrial digital broadcasting service. In this case, in a series of descriptions of the processing and effects of the example in the case where the "terrestrial digital key" of the remote controller 180R is pressed in the case where the advanced terrestrial digital broadcasting service is being received and displayed, the "advanced terrestrial digital broadcasting service" is replaced with the "terrestrial digital broadcasting service", the "terrestrial digital broadcasting service" is replaced with the "advanced terrestrial digital broadcasting service", the "advanced terrestrial digital key" is replaced with the "terrestrial digital key", and the "terrestrial digital key" is replaced with the "advanced terrestrial digital key". Therefore, since the detailed processing can be described by this replacement, the repeated description is omitted.

According to the network switching process and the channel selection process after the network switching process of the broadcast receiving apparatus 100 in the case where the network switching key of the remote controller 180R is pressed in the embodiment of the present invention shown in fig. 15 described above, it is possible to provide the network switching process and the channel selection process better for the user in accordance with whether or not there is a synchronized broadcast program regarding a broadcast program under view.

The example of the operation sequence of fig. 15 has been described with respect to the network switching between the advanced terrestrial digital broadcasting service and the terrestrial digital broadcasting service, but the operation sequence may be performed in a combination of other networks as long as the operation sequence is between networks in which synchronous broadcasting is possible. For example, the broadcast may be performed between the terrestrial digital broadcast service and the advanced BS digital broadcast service, or between the advanced terrestrial digital broadcast service and the BS digital broadcast service.

Processing example of switching networks with synchronous switch button

Next, fig. 16 shows an example of a case where the remote controller 180R of the broadcast receiving apparatus 100 according to the embodiment of the present invention includes the "synchronization switching key" 180RJ as a new key. The "sync switch key" 180RJ is a key simply referred to as "sync" in the example of fig. 16. Here, when the "synchronization switching button" 180RJ is pressed, the reception processing and the display processing of the broadcast receiving apparatus 100 are switched in accordance with the result of the identification processing or the reference processing by performing, for the user's viewing program currently being received and displayed by the broadcast receiving apparatus 100, the identification processing of whether or not the synchronization broadcasting of the program is performed in another network, or referring to the information stored in the nonvolatile memory such as the ROM103 and the storage (accumulation) section 110, whether or not the synchronization broadcasting of the program is performed.

Fig. 17 shows an example of an operation sequence of the reception process and the display process of the broadcast receiving apparatus 100 in the case where the "synchronization switch key" 180RJ of the remote controller 180R is pressed in the embodiment of the present invention.

In the example of fig. 17, the case where the "synchronization switch button" 180RJ of the remote controller 180R is pressed when the advanced terrestrial digital broadcasting service is being received and displayed, that is, the case where an attempt is made to switch from receiving and displaying a broadcast program of the advanced terrestrial digital broadcasting service to receiving and displaying a broadcast program of a service of a pair of synchronous broadcasts is an example of the start point of the present figure. In the broadcast receiving apparatus 100, the case where the "synchronization switch button" 180RJ of the remote controller 180R is pressed when the terrestrial digital broadcast service is being received and displayed, that is, the case where an attempt is made to switch from receiving and displaying a broadcast program of the terrestrial digital broadcast service to receiving and displaying a broadcast program of a service of paired synchronous broadcasting is another example of the start point of the present figure. That is, the operation sequence of fig. 17 can be applied to any switching when the "synchronization switching button" 180RJ of the remote controller 180R is used to switch between receiving and displaying a service or a broadcast program for synchronous broadcasting when the broadcast receiving apparatus 100 is receiving and displaying a terrestrial digital broadcast service or when the broadcast receiving apparatus is displaying a terrestrial digital broadcast service for advanced.

First, with reference to fig. 17, an example will be described in which, in the case where a program of one service of the advanced terrestrial digital broadcasting service is being received and displayed in the broadcast receiving apparatus 100, the "synchronization switch key" 180RJ of the remote controller 180R is pressed, that is, an attempt is made to switch from receiving and displaying the advanced terrestrial digital broadcasting service to receiving and displaying the service or the program as the synchronized broadcast.

In the broadcast receiving apparatus 100, when the "synchronization switch button" 180RJ of the remote controller 180R is pressed in a case where a program of one service of the advanced terrestrial digital broadcasting service is being received and displayed, the broadcast receiving apparatus 100 (for example, the reception function control unit 1102, the same applies hereinafter) confirms whether or not a service or a program as a synchronized broadcast exists in another network such as the terrestrial digital broadcasting for the advanced terrestrial digital broadcasting service or the program thereof being received and displayed (S1701). Whether or not there is a service or program that is synchronized broadcast, a determination may be made based on the identification of whether or not synchronized broadcast is performed, and based on the result of the identification, together with the service list or including information stored in the service list whether or not synchronized broadcast is performed.

When the broadcast receiving apparatus 100 determines that the advanced terrestrial digital broadcasting service or the program thereof received and displayed before the "sync switch key" 180RJ is pressed has a service or program that is a synchronized broadcast in another network such as the terrestrial digital broadcasting (S1701: present), the flow proceeds to S1702.

In S1702, the broadcast receiving apparatus 100 receives a program currently being broadcast in a service or a program that is being broadcast in synchronization in other networks such as terrestrial digital broadcasting in which synchronization broadcast is determined to exist in S1701 as a channel selection target after network switching. Then, the broadcast receiving apparatus 100 displays the received program (S1704). In this case, the channel selection target after the network switching may be determined based on the determination processing for determining the pair of services to be synchronously broadcast and the information for determining the pair of services to be synchronously broadcast stored in the service list together with the service list or included in the service list based on the result of the determination processing.

On the other hand, in S1701, when it is determined that the advanced terrestrial digital broadcasting service or the program thereof received and displayed before the "synchronization switch button" 180RJ is pressed does not exist in another network such as the terrestrial digital broadcasting (S1701: not exist), the broadcast receiving apparatus 100 proceeds to S1703.

In S1703, the broadcast receiving apparatus 100 performs processing of displaying a message notifying the user of "the program is not synchronously broadcast". In this case, the channel selection processing is not performed. Fig. 18 shows a specific example of the message display at S1703.

Fig. 18 shows an example in which a message 1801 "the program is not synchronously broadcast" is displayed on the monitor 192 of the broadcast receiving apparatus 100 in S1703. Fig. 18 shows an example in which a message 1801 is displayed superimposed on a program video. In S1703, since the channel selection process is not performed, the message 1801 is displayed superimposed on the program image of the program received and displayed before the "sync switch key" 180RJ is pressed. In addition, as a modification, the display of the program video may be stopped when the message 1801 is displayed.

Next, with reference to the same fig. 17 and 18, an example will be described in which, in the case where a program of one service of the terrestrial digital broadcasting service is being received and displayed in the broadcast receiving apparatus 100, the "synchronization switch key" 180RJ of the remote controller 180R is pressed, that is, an attempt is made to switch from receiving and displaying the terrestrial digital broadcasting service to receiving and displaying the service or the program as the synchronized broadcast.

In this case, in a series of descriptions of the processing and effects of the example in the case where the "synchronization switch button" 180RJ of the remote controller 180R is pressed in the case where the advanced terrestrial digital broadcasting service is being received and displayed, the "advanced terrestrial digital broadcasting service" may be replaced with the "terrestrial digital broadcasting service" and the "terrestrial digital broadcasting service" may be replaced with the "advanced terrestrial digital broadcasting service". Therefore, since the detailed processing can be described by this replacement, the repeated description is omitted.

According to the channel selection process, the synchronized broadcast program display process, and the message display process of the broadcast receiving apparatus 100 in the case where the "synchronized switch key" 180RJ of the remote controller 180R is pressed, the embodiments of the present invention shown in fig. 16, 17, and 18 described above, even if the "synchronized switch key" 180RJ is pressed, it is possible to notify the user that there is no service or program of synchronized broadcast, and it is possible to provide a synchronized broadcast program display process and a message display process that are better for the user in accordance with whether there is a synchronized broadcast program regarding an audio-visual broadcast program.

The example of the operation sequence of fig. 17 describes the processing of pressing the "sync switch button" 180RJ when receiving an advanced terrestrial digital broadcasting service or when receiving a terrestrial digital broadcasting service as an example, but the operation sequence can be applied to a case where pressing the "sync switch button" 180RJ when receiving another broadcasting service. For example, it may also be applied when receiving BS digital broadcasting services and when receiving advanced BS digital broadcasting services.

Examples of the embodiments of the present invention have been described above using examples 1 and 2, but the configuration of implementing the technique of the present invention is not limited to the above examples, and various modifications can be considered. For example, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. All of which are within the scope of the present invention. In addition, numerical values, messages, and the like appearing in the text and the drawings are merely examples, and even if they are used differently, the effects of the present invention are not impaired.

For example, the functions and the like of the present invention described above may be implemented in hardware by designing them in an integrated circuit or the like. The present invention can also be implemented in software by a microprocessor unit or the like interpreting and executing an operation program for realizing each function or the like. Hardware and software may also be used simultaneously.

The software for controlling the broadcast receiving apparatus 100 may be stored in advance in the ROM103 and/or the storage unit 110 of the broadcast receiving apparatus 100 at the time of shipping the product. The product may be obtained from a server device on the internet 800 via the LAN communication unit 121 after shipment. The software stored in the memory card, the optical disk, and the like may be acquired through the expansion interface unit 124 and the like. Similarly, the software for controlling the portable information terminal 700 may be stored in advance in the ROM703 and/or the storage unit 710 of the portable information terminal 700 at the time of shipping the product. The product may be obtained from a server device on the internet 800 via the LAN communication unit 721, the mobile phone network communication unit 722, or the like after shipment. The software stored in the memory card, the optical disk, and the like may be acquired through the expansion interface unit 724 or the like.

In addition, control lines and information lines shown in the drawings are shown as deemed necessary for explanation, and not necessarily all control lines and information lines on the product. In practice it is also possible to consider that almost all structures are interconnected.

Description of the reference numerals

100: broadcast receiving apparatus, 101: main control unit, 102: system bus, 103: ROM,104: RAM,110: storage (accumulation) section, 121: LAN communication unit, 124: expansion interface portion, 125: digital interface sections, 130C, 130T, 130L, 130B: modem unit, 140S, 140U: decoder section, 180: operation input unit 191: image selecting unit, 192: monitor unit, 193: image output unit, 194: sound selecting section, 195: speaker portion, 196: sound output unit, 180R: remote controller, 200C, 200T, 200S, 200L, 200B: antennas 201T, 201L, 201B: conversion units 300, 300T, 300S, 300L: radio tower, 400C: headend of cable television station, 400: broadcast station server, 500: service operator server, 600: mobile phone communication server, 600B: base station, 700: portable information terminal, 800: internet, 800R: a router device.

Claims

1. A digital broadcast receiving apparatus, comprising:

1 or more receiving units that receive broadcast waves of digital broadcasting in which a 2K broadcast program and a 4K broadcast program are transmitted by synchronous broadcasting from a broadcasting station side;

a control unit; and

The memory device is used for storing the data,

the 1 or more receiving units frequency-scans the received broadcast wave to detect a 2K broadcast service transmitting the 2K broadcast program, generates a service list of the 2K broadcast service using information on the detected 2K broadcast service, frequency-scans the broadcast wave to detect a 4K broadcast service transmitting the 4K broadcast program after the detection of the 2K broadcast service, generates a service list of the 4K broadcast service using information on the detected 4K broadcast service, and the memory stores a service list after combining the generated service list of the 2K broadcast service and the service list of the 4K broadcast service.

2. A digital broadcast receiving apparatus, comprising:

a first receiving unit that receives broadcast waves of digital broadcasting of a 2K broadcast program and a 4K broadcast program transmitted from a broadcast station side by synchronous broadcast transmission using modulation waves of different layers of the same broadcast wave,

a second receiving unit that receives the broadcast wave of the digital broadcast;

a control unit; and

the memory device is used for storing the data,

the first receiving section and the second receiving section are different receiving sections that receive the same digital broadcast wave,

The first receiving unit performs frequency scanning on the broadcast wave received by the first receiving unit to detect a 2K broadcast service transmitting the 2K broadcast program, generates a service list of the 2K broadcast service using information on the detected 2K broadcast service, and performs frequency scanning on the broadcast wave identical to the broadcast wave received by the first receiving unit to detect a 4K broadcast service transmitting the 4K broadcast program, generates a service list of the 4K broadcast service using information on the detected 4K broadcast service, and the memory stores a service list obtained by combining the generated service list of the 2K broadcast service and the service list of the 4K broadcast service.

3. The digital broadcast receiving apparatus according to claim 2, wherein:

among the broadcast waves, a 2K broadcast service transmitting the 2K broadcast program uses a modulated wave transmission of an upper layer of the broadcast waves, and a 2K broadcast service transmitting the 4K broadcast program uses a modulated wave transmission of a lower layer of the broadcast waves.

4. A digital broadcast receiving apparatus, comprising:

one or more receiving parts that receive one or more broadcast waves including a plurality of digital broadcast services transmitted through different networks;

A display unit for displaying the program of the digital broadcasting service received by the receiving unit;

an operation input unit for inputting a control signal from a remote controller; and

the control part is used for controlling the control part to control the control part,

when a program of a digital broadcasting service transmitted through one of the networks is being displayed on the display unit, and a signal indicating that a button of the remote controller has been pressed is input to the operation input unit and the button is pressed to indicate that a network receiving the program to be displayed on the display unit is to be switched to another network, the control unit performs control to change a channel selection operation for the service of the other network according to whether or not the service or the program transmitted through the other network includes the service or the program that is a service transmitting the program being displayed on the display unit or a synchronous broadcast of the program.

5. The digital broadcast receiving apparatus according to claim 4, wherein:

the control unit controls the channel selection operation so that, when a service or program that is a synchronous broadcast for transmitting a program being displayed by the display unit is included in a service or program transmitted through the other network, the service or program that is the synchronous broadcast is displayed in the service or program of the other network after channel selection.

6. The digital broadcast receiving apparatus according to claim 5, wherein:

there is a memory device which is provided with a memory,

the control unit controls the channel selection operation so that, when the service or program transmitted through the other network does not include the service or program that is the synchronized broadcast of the service or program that transmitted the program being displayed by the display unit, the service or program of the other network stored in the memory and that is displayed last by the display unit is displayed after channel selection.

7. A digital broadcast receiving apparatus, comprising:

when a program of a digital broadcast service transmitted through one of the networks is being displayed on the display unit, and a signal indicating that a button of the remote controller has been pressed is input to the operation input unit and the button is pressed to indicate that a network that receives the program to be displayed on the display unit is to be switched to another network, the control unit performs control to change the display processing on the display unit according to whether or not a service or program transmitted through another network received by the digital broadcast receiving device is included as a service or program that transmits the program being displayed on the display unit or a service or program that is synchronously broadcast of the program.

8. The digital broadcast receiving apparatus according to claim 7, wherein:

the control unit controls the display processing of the display unit so that, when a service or program that is a synchronous broadcast for transmitting a program being displayed on the display unit is included in a service or program that is transmitted via another network and received by the digital broadcast receiving apparatus, the service or program that is the synchronous broadcast is displayed on the other network after channel selection.

9. The digital broadcast receiving apparatus according to claim 7, wherein:

the control unit controls, when the service or program that is transmitted through the other network and is received by the digital broadcast receiving apparatus does not include the service or program that is synchronously broadcast for transmitting the program that is being displayed by the display unit, to display a message indicating that the service or program that is synchronously broadcast does not exist on the display unit for the service or program that is transmitted the program that is being displayed by the display unit.