JP2022163274A - Display device and reproduction method - Google Patents

Abstract

To satisfactorily transmit or receive a high-definition digital broadcast service.SOLUTION: When one or more receiving unit receives simultaneous broadcast, a control unit of a display device performs reproduction including video display by a broadcast system of 4K broadcast, in accordance with a configuration or an operation from a user. In a case of reproducing the simultaneous broadcast by the broadcast system of 4K broadcast, the control unit switches the reproduction by the broadcast system of 4K broadcast to reproduction by the broadcast system of 2K broadcast, in accordance with a configuration or an operation from the user for switching from 4K broadcast to 2K broadcast.SELECTED DRAWING: Figure15D

Description

The present invention relates to a digital broadcast receiver.

In the late 1990s, digital broadcasting services began in many countries in place of conventional analog broadcasting services. Digital broadcasting services are improving broadcasting quality using error correction technology, multi-channel and HD (High Definition) using compression coding technology, BML (Broadcast Markup Language) and HTML5 (Hyper Text Markup Language version 5). We realized the multimediaization of the services used.

In recent years, advanced digital broadcasting systems are being studied in various countries for the purpose of further improving the efficiency of frequency use, increasing the resolution, and increasing the functionality.

JP 2016-144020 A

More than 10 years have already passed since the current digital broadcasting service started, and broadcast receivers capable of receiving the current digital broadcasting service are widely used. For this reason, compatibility with the current digital broadcasting service must be taken into consideration when starting the advanced digital broadcasting service currently under study. In other words, it is preferable to implement UHD (Ultra High Definition) video signals while maintaining the viewing environment of current digital broadcasting services.

There is a system described in Patent Literature 1 as a technique for realizing UHD broadcasting in digital broadcasting services. However, the system described in Patent Document 1 is intended to replace the current digital broadcasting, and does not take into consideration the maintenance of the viewing environment for the current digital broadcasting service.

SUMMARY OF THE INVENTION An object of the present invention is to provide a technique for more preferably transmitting or receiving advanced digital broadcasting services with higher functions, taking compatibility with existing digital broadcasting services into consideration.

As means for solving the above problems, the technology described in the claims is used.

For example, the display device receives, as digital broadcasting, 2K broadcasting, 4K broadcasting, and simultaneous broadcasting in both 2K broadcasting and 4K broadcasting, and one or more receiving units. , and a control unit, wherein the control unit includes video display in the 4K broadcast format according to settings or user operation when the simulcast is received by the one or more reception units. Playback is performed, and when the simultaneous broadcast is being played back in the 4K broadcast broadcasting method, the setting for switching from the 4K broadcast to the 2K broadcast or according to an operation from the user, Playback in the 4K broadcast broadcasting method. to the reproduction in the broadcasting system of the 2K broadcasting.

ADVANTAGE OF THE INVENTION According to this invention, the technique which transmits or receives advanced digital broadcasting service more suitably can be provided.

1 is a system configuration diagram of a broadcasting system according to an embodiment of the present invention; FIG. 1 is a block diagram of a broadcast receiver according to one embodiment of the present invention; FIG. 3 is a detailed block diagram of the first tuner/demodulator of the broadcast receiver according to one embodiment of the present invention; FIG. FIG. 4 is a detailed block diagram of the second tuner/demodulator of the broadcast receiver according to one embodiment of the present invention; FIG. 4 is a detailed block diagram of the third tuner/demodulator of the broadcast receiver according to one embodiment of the present invention; FIG. 4 is a detailed block diagram of a fourth tuner/demodulator of the broadcast receiver according to one embodiment of the present invention; FIG. 3 is a detailed block diagram of the first decoder section of the broadcast receiver according to one embodiment of the present invention; FIG. 4 is a detailed block diagram of the second decoder section of the broadcast receiver according to one embodiment of the present invention; 1 is a software configuration diagram of a broadcast receiving apparatus according to an embodiment of the present invention; FIG. 1 is a configuration diagram of a broadcasting station server according to an embodiment of the present invention; FIG. It is a block diagram of a service provider server according to one embodiment of the present invention. 1 is a block diagram of a mobile information terminal according to an embodiment of the present invention; FIG. 1 is a software configuration diagram of a mobile information terminal according to an embodiment of the present invention; FIG. It is a figure explaining the segment structure which concerns on the digital broadcasting of one Example of this invention. FIG. 3 is a diagram illustrating hierarchical allocation in hierarchical transmission related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining processing for generating OFDM transmission waves related to digital broadcasting according to an embodiment of the present invention; FIG. 2 is a diagram for explaining the basic configuration of a transmission line coding unit related to digital broadcasting according to one embodiment of the present invention; FIG. 4 is a diagram illustrating OFDM segment parameters for digital broadcasting according to an embodiment of the present invention; FIG. 2 is a diagram illustrating transmission signal parameters related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram illustrating the arrangement of pilot signals in synchronous modulation segments related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram illustrating the arrangement of pilot signals in differentially modulated segments related to digital broadcasting according to an embodiment of the present invention; FIG. 2 is a diagram illustrating bit allocation of TMCC carriers related to digital broadcasting according to an embodiment of the present invention; It is a figure explaining the bit allocation of the TMCC information which concerns on the digital broadcasting of one Example of this invention. FIG. 4 is a diagram illustrating transmission parameter information of TMCC information related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram illustrating system identification of TMCC information related to digital broadcasting according to an embodiment of the present invention; FIG. 2 is a diagram illustrating a carrier modulation mapping scheme of TMCC information related to digital broadcasting according to one embodiment of the present invention; It is a figure explaining the frequency conversion process identification of the TMCC information which concerns on the digital broadcasting of one Example of this invention. FIG. 4 is a diagram explaining physical channel number identification of TMCC information related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining main signal identification of TMCC information related to digital broadcasting according to an embodiment of the present invention; FIG. 3 is a diagram illustrating 4K signal transmission layer identification of TMCC information related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram illustrating additional layer transmission identification of TMCC information related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining identification of a coding rate of an inner code of TMCC information related to digital broadcasting according to one embodiment of the present invention; FIG. 4 is a diagram illustrating bit allocation of AC signals for digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining configuration identification of an AC signal related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining seismic motion warning information of an AC signal related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining signal identification of seismic motion warning information of an AC signal related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining seismic motion warning detailed information of AC signal seismic motion warning information related to digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining seismic motion warning detailed information of AC signal seismic motion warning information related to digital broadcasting according to an embodiment of the present invention; FIG. 3 is a diagram for explaining additional information regarding transmission control of modulated waves of AC signals for digital broadcasting according to an embodiment of the present invention; FIG. 4 is a diagram for explaining transmission parameter additional information of an AC signal related to digital broadcasting according to one embodiment of the present invention; FIG. 2 is a diagram illustrating an AC signal error correction system for digital broadcasting according to an embodiment of the present invention; It is a figure explaining the constellation format of the AC signal concerning the digital broadcasting of one Example of this invention. 1 is a diagram illustrating a dual-polarization transmission system according to an embodiment of the present invention; FIG. 1 is a system configuration diagram of a broadcasting system using a dual-polarization transmission system according to an embodiment of the present invention; FIG. 1 is a system configuration diagram of a broadcasting system using a dual-polarization transmission system according to an embodiment of the present invention; FIG. It is a figure explaining the frequency conversion process which concerns on one Example of this invention. 1 is a diagram illustrating the configuration of a pass-through transmission system according to an embodiment of the present invention; FIG. FIG. 4 is a diagram illustrating pass-through transmission bands according to an embodiment of the present invention; 1 is a diagram illustrating the configuration of a pass-through transmission system according to an embodiment of the present invention; FIG. FIG. 4 is a diagram illustrating pass-through transmission bands according to an embodiment of the present invention; FIG. 4 is a diagram illustrating pass-through transmission bands according to an embodiment of the present invention; 1 is a diagram illustrating a single polarized wave transmission system according to an embodiment of the present invention; FIG. 1 is a system configuration diagram of a broadcasting system using a single polarized wave transmission system according to an embodiment of the present invention; FIG. 1 is a diagram for explaining a hierarchical division multiplexing transmission system according to an embodiment of the present invention; FIG. 1 is a system configuration diagram of a broadcasting system using a hierarchical division multiplexing transmission system according to an embodiment of the present invention; FIG. It is a figure explaining the frequency conversion amplification process based on one Example of this invention. 1 is a system configuration diagram of a broadcasting system using a hierarchical division multiplexing transmission system according to an embodiment of the present invention; FIG. FIG. 2 is a diagram illustrating a protocol stack of MPEG-2 TS; FIG. 2 is a diagram for explaining the names and functions of tables used in MPEG-2 TS; FIG. 2 is a diagram for explaining the names and functions of tables used in MPEG-2 TS; FIG. 2 is a diagram for explaining names and functions of descriptors used in MPEG-2 TS; FIG. 2 is a diagram for explaining names and functions of descriptors used in MPEG-2 TS; FIG. 2 is a diagram for explaining names and functions of descriptors used in MPEG-2 TS; FIG. 2 is a diagram for explaining names and functions of descriptors used in MPEG-2 TS; FIG. 2 is a diagram for explaining names and functions of descriptors used in MPEG-2 TS; FIG. 2 is a diagram for explaining names and functions of descriptors used in MPEG-2 TS; FIG. 2 is a diagram illustrating a protocol stack in an MMT broadcast transmission path; FIG. 2 is a diagram illustrating a protocol stack in an MMT communication line; FIG. FIG. 4 is a diagram for explaining the names and functions of tables used in MMT TLV-SI; FIG. 4 is a diagram for explaining names and functions of descriptors used in MMT TLV-SI; FIG. 2 is a diagram for explaining names and functions of messages used in MMT-SI of MMT; FIG. 4 is a diagram for explaining names and functions of tables used in MMT-SI of MMT; FIG. 4 is a diagram for explaining names and functions of descriptors used in MMT-SI of MMT; FIG. 4 is a diagram for explaining names and functions of descriptors used in MMT-SI of MMT; FIG. 4 is a diagram for explaining names and functions of descriptors used in MMT-SI of MMT; FIG. 3 is a diagram for explaining the relationship between MMT data transmission and each table; FIG. 4 is an operation sequence diagram of channel setting processing of the broadcast receiving apparatus according to one embodiment of the present invention; 4 is a diagram illustrating the data structure of a network information table; FIG. FIG. 4 illustrates the data structure of a Terrestrial Distribution System Descriptor; FIG. 4 is a diagram explaining the data structure of a service list descriptor; FIG. 4 is a diagram illustrating the data structure of a TS information descriptor; 1 is an external view of a remote controller according to one embodiment of the present invention; FIG. FIG. 5 is a diagram illustrating banner display when selecting a channel according to an embodiment of the present invention; It is a figure explaining an example of the transmission structure of the control information which concerns on one Example of this invention. It is a figure explaining an example of the transmission structure of the control information which concerns on one Example of this invention. It is a figure explaining an example of the transmission structure of the control information which concerns on one Example of this invention. It is a figure explaining an example of the transmission structure of the control information which concerns on one Example of this invention. It is a figure explaining an example of the transmission structure of the control information which concerns on one Example of this invention. It is a figure explaining an example of the transmission structure of the control information which concerns on one Example of this invention. It is a figure explaining an example of the channel setting process which concerns on one Example of this invention. It is a figure explaining an example of the channel setting process which concerns on one Example of this invention. FIG. 4 is a diagram illustrating the data structure of a service descriptor; It is a figure explaining the list of service format classification. FIG. 4 is a diagram explaining the data structure of a service group descriptor; FIG. 10 is a diagram illustrating a list of service group types; FIG. It is a figure explaining an example of the channel setting process which concerns on one Example of this invention. FIG. 4 is a diagram illustrating transmission of simulcast from a broadcasting station to a display device (2K/4K shared receiver) according to an embodiment of the present invention; FIG. 4 is a diagram illustrating time delays that exist in transmission processing and reception processing of simulcast according to an embodiment of the present invention; 1 is an external view of a remote controller according to one embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining processing timing and the like for switching from 4K broadcasting to 2K broadcasting of simultaneous broadcasting according to an embodiment of the present invention;

Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings.

(Example 1)
[System configuration]
FIG. 1 is a system configuration diagram showing an example of the configuration of a broadcasting system.

The broadcasting system includes, for example, a broadcast receiving apparatus 100, an antenna 200, a radio tower 300 of a broadcasting station, a broadcasting station server 400, a service provider server 500, a mobile phone communication server 600, a base station 600B of a mobile phone communication network, and a mobile phone. It is composed of an information terminal 700, a broadband network 800 such as the Internet, and a router device 800R. Various server devices and communication devices may be further connected to the Internet 800 .

The broadcast receiving apparatus 100 is a television receiver having a function of receiving advanced digital broadcasting services. The broadcast receiving apparatus 100 may further have a reception function for existing digital broadcast services. Furthermore, by linking functions using broadband networks to digital broadcasting services (existing digital broadcasting services or advanced digital broadcasting services), acquisition of additional content via broadband networks, arithmetic processing in server devices, and cooperation with mobile terminal devices It is possible to correspond to a broadcasting and communication cooperation system that combines presentation processing and the like with digital broadcasting services. Broadcast receiving apparatus 100 receives digital broadcast waves transmitted from radio tower 300 via antenna 200 . The digital broadcast wave may be directly transmitted from the radio tower 300 to the antenna 200, or may be transmitted via a broadcasting satellite, communication satellite, or the like (not shown). A broadcast signal retransmitted by a cable television station may be received via a cable line or the like. Broadcast receiving apparatus 100 can be connected to Internet 800 via router apparatus 800R, and can transmit and receive data through communication with each server apparatus on Internet 800. FIG.

The router device 800R is connected to the Internet 800 by wireless communication or wired communication, is connected to the broadcast receiving device 100 by wired communication, and is connected to the portable information terminal 700 by wireless communication. As a result, each server device on the Internet 800, the broadcast receiving device 100, and the portable information terminal 700 can mutually transmit and receive data via the router device 800R. Router device 800R, broadcast receiving device 100, and mobile information terminal 700 form a LAN (Local Area Network). Note that the communication between the broadcast receiving device 100 and the mobile information terminal 700 may be performed directly by a method such as BlueTooth (registered trademark) or NFC (Near Field Communication) without going through the router device 800R.

The radio tower 300 is broadcasting equipment of a broadcasting station, and transmits digital broadcasting waves including various control information related to digital broadcasting services, content data of broadcasting programs (video content, audio content, etc.) and the like. The broadcasting station also has a broadcasting station server 400 . The broadcast station server 400 stores content data of broadcast programs and metadata such as program titles, program IDs, program summaries, performers, and broadcast dates and times of each broadcast program. The broadcasting station server 400 provides the content data and metadata to the service provider based on the contract. Content data and metadata are provided to the service provider through an API (Application Programming Interface) of the broadcasting station server 400 .

The service provider server 500 is a server device prepared by the service provider to provide services by the broadcast-communication cooperation system. The service provider server 500 stores, manages, and stores content data and metadata provided by the broadcasting station server 400, and content data and applications (operating programs and/or various data, etc.) produced for the broadcast and communication collaboration system. distribution, etc. It also has a function of searching for applications that can be provided and providing a list in response to an inquiry from a television receiver. Note that the storage, management, distribution, etc. of the content data and metadata and the storage, management, distribution, etc. of the application may be performed by different server devices. The broadcasting station and the service provider may be the same or may be different providers. A plurality of service provider servers 500 may be prepared for different services. Also, the functions of the service provider server 500 may be provided by the broadcasting station server 400 .

The mobile telephone communication server 600 is connected to the Internet 800, and is also connected to the mobile information terminal 700 via the base station 600B. The mobile telephone communication server 600 manages telephone communication (call) and data transmission/reception via the mobile telephone communication network of the mobile information terminal 700, and transmits data by communication between the mobile information terminal 700 and each server device on the Internet 800. can be sent and received. Communication between portable information terminal 700 and broadcast receiving apparatus 100 may be performed via base station 600B, mobile telephone communication server 600, Internet 800, and router apparatus 800R.

[Hardware Configuration of Broadcast Receiver]
FIG. 2A is a block diagram showing an example of the internal configuration of the broadcast receiving apparatus 100. As shown in FIG.

Broadcast receiving apparatus 100 includes main control unit 101, system bus 102, ROM 103, RAM 104, storage (accumulation) unit 110, LAN communication unit 121, expansion interface unit 124, digital interface unit 125, first tuner/demodulation unit 130C, second Second tuner/demodulator 130T, third tuner/demodulator 130L, fourth tuner/demodulator 130B, first decoder 140S, second decoder 140U, operation input unit 180, video selector 191, monitor 192, video It is composed of an output unit 193 , an audio selection unit 194 , a speaker unit 195 and an audio output unit 196 .

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

A ROM (Read Only Memory) 103 is a non-volatile memory that stores a basic operation program such as an operating system and other operation programs. Used. Further, the ROM 103 stores operation setting values and the like necessary for the operation of the broadcast receiving apparatus 100 . A RAM (Random Access Memory) 104 serves as a work area for executing the basic operating program and other operating programs. The ROM 103 and the RAM 104 may be configured integrally with the main control section 101 . Also, the ROM 103 may use a partial storage area in the storage (accumulation) section 110 instead of having an independent configuration as shown in FIG. 2A.

The storage (accumulation) unit 110 stores an operation program and operation setting values of the broadcast receiving device 100, personal information of the user of the broadcast receiving device 100, and the like. Further, it is possible to store an operation program downloaded via the Internet 800 and various data created by the operation program. In addition, content such as moving images, still images, and audio obtained from broadcast waves or downloaded via the Internet 800 can also be stored. A partial area of the storage (accumulation) unit 110 may be used to replace all or part of the functions of the ROM 103 . In addition, the storage (accumulation) unit 110 needs to retain stored information even when power is not supplied to the broadcast receiving apparatus 100 from the outside. Therefore, devices such as semiconductor element memories such as flash ROMs and SSDs (Solid State Drives) and magnetic disk drives such as HDDs (Hard Disc Drives) are used.

The operation programs stored in the ROM 103 and the storage (accumulation) unit 110 can be added, updated, and expanded in function by downloading from each server device on the Internet 800 or broadcast waves.

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 on the Internet 800 and other communication devices. It also acquires content data (or part thereof) of a program transmitted via a communication line. 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. Also, the broadcast receiving apparatus 100 may further include other communication units such as a BlueTooth (registered trademark) communication unit, an NFC communication unit, an infrared communication unit, and the like.

The first tuner/demodulator 130C, the second tuner/demodulator 130T, the third tuner/demodulator 130L, and the fourth tuner/demodulator 130B each receive broadcast waves of the digital broadcasting service, A channel selection process (channel selection) is performed by tuning to a channel of a predetermined service based on the control. Furthermore, it performs demodulation processing, waveform shaping processing, etc. of the modulated wave of the received signal, reconstruction processing of the frame structure and hierarchical structure, energy despreading processing, error correction decoding processing, etc., and reproduces the packet stream. It also extracts and decodes a transmission multiplexing configuration control (TMCC) signal from the received signal.

The first tuner/demodulator 130C can receive digital broadcast waves of the current digital terrestrial broadcasting service received by the antenna 200C, which is an antenna for receiving the current digital terrestrial broadcasting. In addition, the first tuner/demodulator 130C inputs a broadcast signal of one of the horizontal (H) polarized wave signal and the vertical (V) polarized wave signal of dual-polarization terrestrial digital broadcasting, which will be described later. It is also possible to demodulate segments of layers that employ the same modulation scheme as the terrestrial digital broadcasting service. In addition, the first tuner/demodulator 130C can input a broadcast signal of a single-polarized terrestrial digital broadcast, which will be described later, and demodulate a hierarchical segment that adopts the same modulation method as the current terrestrial digital broadcast service. be. In addition, the first tuner/demodulator 130C can also input a broadcast signal of hierarchical division multiplexing digital terrestrial broadcasting, which will be described later, and demodulate the segment of the hierarchy that adopts the same modulation method as the current digital terrestrial broadcasting service. be.

The second tuner/demodulator 130T inputs the digital broadcast wave of the advanced digital terrestrial broadcasting service received by the antenna 200T, which is a dual-polarization antenna for receiving digital terrestrial broadcasting, via the converter 201T. Also, the second tuner/demodulator 130T may input a digital broadcast wave of an advanced digital terrestrial broadcasting service received by a single-polarized digital terrestrial broadcasting receiving antenna (not shown). When the second tuner/demodulator 130T receives a digital broadcast wave of an advanced digital terrestrial broadcasting service from a single-polarized digital terrestrial broadcasting receiving antenna (not shown), the converter 201T does not have to be used. The antenna 200T for receiving digital broadcasting waves of dual-polarization digital terrestrial broadcasting includes an element for receiving a horizontal polarized signal and an element for receiving a vertical polarized signal. A single-polarized terrestrial digital broadcasting receiving antenna (not shown) includes either an element for receiving a horizontally polarized wave signal or an element for receiving a vertically polarized wave signal. The single polarized terrestrial digital broadcasting receiving antenna (not shown) may be shared with the antenna 200C, which is the current terrestrial digital broadcasting receiving antenna.

The third tuner/demodulator 130L inputs the digital broadcast wave of the advanced digital terrestrial broadcasting service received by the antenna 200L, which is an antenna for receiving hierarchical division multiplexing digital terrestrial broadcasting, via the converter 201L.

The fourth tuner/demodulator 130B converts the digital broadcast wave of the advanced BS (Broadcasting Satellite) digital broadcasting service or the advanced CS (Communication Satellite) digital broadcasting service received by the antenna 200B, which is a BS/CS shared reception antenna, into a converting unit. 201B.
The expression "tuner/demodulator" means a component having a tuner function and a demodulator function.

Further, antenna 200C, antenna 200T, antenna 200L, antenna 200B, conversion unit 201T, conversion unit 201L, and conversion unit 201B do not constitute a part of broadcast receiving apparatus 100, and are installed in a building where broadcast receiving apparatus 100 is installed. It belongs to the equipment side such as.

In addition, the current digital terrestrial broadcasting described above is a broadcasting signal of a digital terrestrial broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels.

In addition, the details of dual-polarization terrestrial digital broadcasting (advanced terrestrial digital broadcasting that employs a dual-polarization transmission method) and single-polarization terrestrial digital broadcasting (advanced terrestrial digital broadcasting that employs a single-polarization transmission method) will be described later. This is a broadcasting signal of a terrestrial digital broadcasting service capable of transmitting video with a maximum resolution exceeding 1920 horizontal pixels×1080 vertical pixels. Dual-polarization digital terrestrial broadcasting is digital terrestrial broadcasting that uses multiple polarizations of horizontal (H) polarization and vertical (V) polarization. This segment transmits terrestrial digital broadcasting services capable of transmitting video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels. Single polarized terrestrial digital broadcasting is terrestrial digital broadcasting that uses either horizontal (H) polarization or vertical (V) polarization. A terrestrial digital broadcasting service capable of transmitting video with a maximum resolution exceeding 1080 pixels is transmitted.

In the description of each embodiment of the present invention, when the expression "multiple polarized waves" is used for dual-polarization terrestrial digital broadcasting, unless otherwise specified, horizontal (H) polarized waves and vertical (V) polarized waves are used. We mean the two polarizations of the wave. Moreover, even when the expression "polarized wave" is simply used, it means "polarized wave signal". In addition, in one or both of the multiple polarized waves, some of the divided segments transmit video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels. can be transmitted with That is, in the dual-polarization digital terrestrial broadcasting, the current terrestrial digital broadcasting service that transmits video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels in a plurality of segments with different polarizations in each embodiment of the present invention, and horizontal It is possible to simultaneously transmit terrestrial digital broadcasting services capable of transmitting video with a maximum resolution exceeding 1920 pixels×1080 vertical pixels. In addition, single-polarized terrestrial digital broadcasting can transmit video with a maximum resolution of 1920 horizontal pixels x 1080 vertical pixels using the same modulation method as the above-mentioned current digital terrestrial broadcasting, which transmits video in some divided segments. . That is, in the single-polarized digital terrestrial broadcasting, in different segments of each embodiment of the present invention, the current terrestrial digital broadcasting service that transmits video with a maximum resolution of horizontal 1920 pixels × vertical 1080 pixels, and a horizontal 1920 pixels × vertical 1080 pixels It is possible to simultaneously transmit a terrestrial digital broadcasting service capable of transmitting video with a maximum resolution exceeding the number of pixels.

In addition, although the details of the hierarchical division multiplexing digital terrestrial broadcasting (advanced terrestrial digital broadcasting employing the hierarchical division multiplexing transmission method) will be described later, it is possible to transmit video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels. It is a broadcasting signal of terrestrial digital broadcasting service. Hierarchical division multiplexing digital terrestrial broadcasting multiplexes a plurality of digital broadcasting signals with different signal levels. Digital broadcasting signals with different signal levels mean different powers for transmitting the digital broadcasting signals. Hierarchical division multiplexing digital terrestrial broadcasting of each embodiment of the present invention is broadcast of the current terrestrial digital broadcasting service that transmits video with maximum resolution of horizontal 1920 pixels × vertical 1080 pixels as a plurality of digital broadcasting signals with different signal levels. It is possible to hierarchically multiplex and transmit a signal and a broadcast signal of a terrestrial digital broadcasting service capable of transmitting video with a maximum resolution exceeding 1920 horizontal pixels×1080 vertical pixels in the frequency band of the same physical channel. That is, in the hierarchical division multiplexing digital terrestrial broadcasting of each embodiment of the present invention, the current terrestrial digital broadcasting service transmitting video with a maximum resolution of horizontal 1920 pixels×vertical 1080 pixels in a plurality of layers with different signal levels, and horizontal It is possible to simultaneously transmit terrestrial digital broadcasting services capable of transmitting video with a maximum resolution exceeding 1920 pixels×1080 vertical pixels.

It should be noted that the broadcast receiver in each embodiment of the present invention may be configured so as to be able to suitably receive advanced digital broadcasts. It is not essential to have all of section 130L and fourth tuner/demodulator section 130B. For example, at least one of the second tuner/demodulator 130T and the third tuner/demodulator 130L may be provided. Further, in order to realize more advanced functions, one or more of the above four tuner/demodulators may be provided in addition to either the second tuner/demodulator 130T or the third tuner/demodulator 130L. good.

Also, the antenna 200C, the antenna 200T, and the antenna 200L may be used as appropriate. Further, among the first tuner/demodulator 130C, the second tuner/demodulator 130T, and the third tuner/demodulator 130L, a plurality of tuners/demodulators may be combined (or integrated) as appropriate.

The first decoder section 140S and the second decoder section 140U are respectively output from the first tuner/demodulator section 130C, the second tuner/demodulator section 130T, the third tuner/demodulator section 130L, and the fourth tuner/demodulator section 130B. A packet stream or a packet stream obtained from each server device on the Internet 800 via the LAN communication unit 121 is input. The packet stream input to the first decoder unit 140S and the second decoder unit 140U is MPEG (Moving Picture Experts Group)-2 TS (Transport Stream), MPEG-2 PS (Program Stream), TLV (Type Length Value), MMT (MPEG Media Transport), etc. format packet stream.

The first decoder unit 140S and the second decoder unit 140U respectively perform conditional access (CA) processing, and extract video data, audio data, and various information data from the packet stream based on various control information included in the packet stream. Demultiplexing processing to separate and extract video data and audio data, acquisition of program information and EPG (Electronic Program Guide) generation processing, data broadcasting screen and multimedia data playback processing, etc. . It also performs a process of superimposing the generated EPG or the reproduced multimedia data on the decoded video data or audio data.

The image selection unit 191 receives the image data output from the first decoder unit 140S and the image data output from the second decoder unit 140U, and appropriately selects and/or superimposes them based on the control of the main control unit 101. process. In addition, the video selection unit 191 appropriately performs scaling processing, OSD (On Screen Display) data superimposition processing, and the like. The monitor unit 192 is, for example, a display device such as a liquid crystal panel, displays the video data selected and/or superimposed by the video selection unit 191, and provides the user of the broadcast receiving apparatus 100 with the video data. The video output unit 193 is a video output interface that outputs video data selected and/or superimposed by the video selection unit 191 to the outside.

The audio selection 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 appropriately selects and/or mixes them under the control of the main control unit 101. process. The speaker unit 195 outputs the audio data selected and/or mixed by the audio selection unit 194 and provides it to the user of the broadcast receiving apparatus 100 . The audio output unit 196 is an audio output interface that outputs audio data selected and/or mixed by the audio selection unit 194 to the outside.

The digital interface unit 125 is an interface that outputs or inputs a packet stream containing encoded digital video data and/or digital audio data. The digital interface unit 125 is configured such that the first decoder unit 140S and the second decoder unit 140U are connected to the first tuner/demodulator unit 130C, the second tuner/demodulator unit 130T, the third tuner/demodulator unit 130L and the fourth tuner/demodulator unit 130B. The input packet stream can be output as is. Also, a packet stream input from the outside via the digital interface unit 125 may be controlled to be input to the first decoder unit 140S and the second decoder unit 140U, or stored in the storage unit 110. FIG. Alternatively, the video data and audio data separated and extracted by the first decoder section 140S and the second decoder section 140U may be output. Further, video data and audio data input from the outside via the digital interface unit 125 may be controlled to be input to the first decoder unit 140S and the second decoder unit 140U and stored in the storage (accumulation) unit 110. good.

The expansion interface unit 124 is a group of interfaces for expanding the functions of the broadcast receiving apparatus 100, and includes an analog video/audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. The analog video/audio interface inputs analog video/audio signals from an external video/audio output device, outputs analog video/audio signals to an external video/audio input device, and the like. The USB interface is connected to a PC or the like to transmit and receive data. An HDD may be connected to record broadcast programs and other content data. Also, a keyboard or other USB devices may be connected. A memory interface connects a memory card or other memory medium to transmit and receive data.

The operation input unit 180 is an instruction input unit for inputting an operation instruction to the broadcast receiving apparatus 100, and is operated by arranging a remote control receiving unit for receiving commands transmitted from a remote controller (not shown) and a button switch. consists of keys. The operation input unit 180 may be only one of the remote control receiving unit and the operation keys. Also, the operation input unit 180 can be replaced by a touch panel or the like that is superimposed on the monitor unit 192 . The operation input unit 180 may be replaced by a keyboard or the like connected to the extended interface unit 124 . The remote control can be replaced by a mobile information terminal 700 having a remote control command transmission function.

Note that if 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 essential components. Further, the broadcast receiving apparatus 100 may be an optical disc drive recorder such as a DVD (Digital Versatile Disc) recorder, a magnetic disc drive recorder such as an HDD recorder, a STB (Set Top Box), or the like, and may have a digital broadcast service reception function. It may be a PC (Personal Computer), a tablet terminal, or the like. If broadcast receiving apparatus 100 is a DVD recorder, HDD recorder, STB, or the like, monitor section 192 and speaker section 195 are not essential components. 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, the same operation as a television receiver or the like is possible.

FIG. 2B is a block diagram showing an example of the detailed configuration of the first tuner/demodulator 130C.

The channel selection/detection unit 131C receives the current digital broadcast wave received by the antenna 200C and selects a channel based on the channel selection control signal. A TMCC decoding unit 132C extracts a TMCC signal from the output signal of the channel selection/detection unit 131C and acquires various TMCC information. The acquired TMCC information is used to control each subsequent process. Details of the TMCC signal and TMCC information will be described later.

The demodulation unit 133C inputs a modulated wave modulated using a scheme such as QPSK (Quadrature Phase Shift Keying), DQPSK (Differential QPSK), 16QAM (Quadrature Amplitude Modulation), 64QAM, etc. based on TMCC information, It performs demodulation processing including frequency deinterleaving, time deinterleaving, carrier demapping processing, and the like. The demodulation unit 133C may be capable of further supporting modulation schemes different from the modulation schemes described above.

The stream reproduction unit 134C performs layer division processing, inner code error correction processing such as Viterbi decoding, energy despreading processing, stream reproduction processing, outer code error correction processing such as RS (Reed Solomon) decoding, and the like. As the error correction processing, a method different from the methods described above may be used. Also, the packet stream reproduced and output by the stream reproduction unit 134C is, for example, MPEG-2 TS or the like, but may be a packet stream of another format.

FIG. 2C is a block diagram showing an example of the detailed configuration of the second tuner/demodulator 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 selects a channel based on the channel selection control signal. The channel selection/detection unit 131V receives the vertical (V) polarized wave signal of the digital broadcast wave received by the antenna 200T, and selects a channel based on the channel selection control signal. The operation of the channel selection process in the tuning/detection section 131H and the operation of the channel selection process in the tuning/detection section 131V may be controlled in conjunction with each other, or may be controlled independently. That is, regarding the channel selection/detection unit 131H and the channel selection/detection unit 131V as one channel selection/detection unit, one of the digital broadcasting services transmitted using both horizontal/vertical polarized waves is used. It is also possible to control to select one channel. Further, assuming that the channel selection/detection unit 131H and the channel selection/detection unit 131V are two independent channel selection/detection units, digital broadcasting transmitted using only horizontal polarization (or only vertical polarization) It is also possible to control to select two channels with different services.

It should be noted that the horizontal (H) polarized wave signal and the vertical (V) polarized wave signal received by the second tuner/demodulator 130T of the broadcast receiving apparatus in each embodiment of the present invention are broadcast waves whose polarization directions differ by approximately 90 degrees. Any polarized wave signal may be used, and the horizontal (H) polarized wave signal, the vertical (V) polarized wave signal, and the reception of the signals described below may be reversed.

A TMCC decoding unit 132H extracts a TMCC signal from the output signal of the channel selection/detection unit 131H and acquires various TMCC information. A TMCC decoding unit 132V extracts a TMCC signal from the output signal of the channel selection/detection unit 131V and acquires various TMCC information. Only one of the TMCC decoding unit 132H and the TMCC decoding unit 132V may be provided. The acquired TMCC information is used to control each subsequent process.

BPSK (Binary Phase Shift Keying), DBPSK (Differential BPSK), QPSK, DQPSK, 8PSK (Phase Shift Keying), 16APSK (Amplitude and Phase Keying), respectively, based on TMCC information and the like. ), 32APSK, 16QAM, 64QAM, 256QAM, 1024QAM, etc. are input, and demodulation processing including frequency deinterleaving, time deinterleaving and carrier demapping processing is performed. The demodulation section 133H and the demodulation section 133V may be capable of further supporting modulation schemes different from the respective modulation schemes described above.

The stream reproducing unit 134H and the stream reproducing unit 134V perform layer division processing, inner code error correction processing such as Viterbi decoding and LDPC (Low Density Parity Check) decoding, energy despreading processing, stream reproduction processing, RS decoding and BCH decoding, respectively. Outer code error correction processing, etc. are performed. As the error correction processing, a method different from the methods described above may be used. Also, the packet stream reproduced and output by the stream reproduction unit 134H is, for example, MPEG-2 TS or the like. The packet stream reproduced and output by the stream reproduction unit 134V is, for example, MPEG-2 TS, TLV including MMT packet stream, or the like, but may be a packet stream of another format.

In addition, when the second tuner/demodulator 130T receives a digital broadcast wave of single-polarized digital terrestrial broadcasting, the channel selector/detector 131V, the TMCC decoder 132V, and the demodulator 133V may not be provided. Further, when the current terrestrial digital broadcasting service and the advanced terrestrial digital broadcasting service are simultaneously transmitted in different segments, among the signals output from the demodulator 133H, the signal of the segment transmitting the current terrestrial digital broadcasting service is stream reproduced. The signal of the segment input to the unit 134H and transmitting the advanced digital terrestrial broadcasting service is input to the stream reproduction unit 134V.

FIG. 2D is a block diagram showing an example of the detailed configuration of the third tuner/demodulator 130L.

The channel selection/detection unit 131L receives a digital broadcast wave subjected to layered division multiplexing (LDM) processing from the antenna 200L and selects a channel based on a channel selection control signal. The digital broadcasting wave subjected to hierarchical division multiplexing is a digital broadcasting service in which the modulated wave of the upper layer (UL) and the modulated wave of the lower layer (LL) are different (or the same broadcasting service is different) channel). Also, the modulated wave of the upper layer is output to the demodulator 133S, and the modulated wave of the lower layer is output to the demodulator 133L.

The TMCC decoding unit 132L receives the upper layer modulated wave and the lower layer modulated wave output from the channel selection/detection unit 131L, extracts the TMCC signal, and acquires various 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 demodulators 133S and 133L perform the same operations as the demodulators 133H and 133V. Also, the stream reproducing section 134S and the stream reproducing section 134L perform the same operations as the stream reproducing section 134H and the stream reproducing section 134V, respectively.

FIG. 2E is a block diagram showing an example of the detailed configuration of the fourth tuner/demodulator 130B.

The channel selection/detection unit 131B receives the digital broadcast wave of the advanced BS digital broadcast service or the advanced CS digital broadcast service received by the antenna 200B, and selects a channel based on the channel selection control signal. Other operations are the same as those of the channel selection/detection section 131H and the channel selection/detection section 131V. Also, the TMCC decoding unit 132B, demodulation unit 133B, and stream reproduction unit 134B perform the same operations as the TMCC decoding unit 132H, TMCC decoding unit 132V, demodulation unit 133H, demodulation unit 133V, and stream reproduction unit 134V, respectively.

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

Under the control of the main control unit 101, the selector 141S selects the packet stream input from the first tuner/demodulator 130C, the packet stream input from the second tuner/demodulator 130T, and the packet stream input from the third tuner/demodulator 130L. One of the packet streams is selected and output. Packet streams input from the first tuner/demodulator 130C, the second tuner/demodulator 130T, and the third tuner/demodulator 130L are, for example, MPEG-2 TS. The CA descrambler 142S performs descrambling processing of a predetermined scramble system encryption algorithm based on various control information relating to conditional access superimposed on the packet stream.

The demultiplexing unit 143S is a stream decoder, and separates and extracts video data, audio data, superimposed text data, caption data, program information data, etc. based on various control information contained in the input packet stream. The separated and extracted video data is distributed to the video decoder 145S, the separated and extracted audio data is distributed to the audio decoder 146S, and the separated and extracted superimposed character data, caption data, program information data, etc. are distributed to the data decoder 144S. A packet stream (for example, MPEG-2 PS, etc.) obtained from a server device on the Internet 800 via the LAN communication unit 121 may be input to the demultiplexing unit 143S. Further, the demultiplexing unit 143S outputs the packet streams input from the first tuner/demodulator 130C, the second tuner/demodulator 130T, and the third tuner/demodulator 130L to the outside via the digital interface unit 125. , and it is possible to input a packet stream obtained from the outside via the digital interface unit 125 .

The video decoder 145S performs compression-encoded video information decoding processing on the video data input from the demultiplexing unit 143S, colorimetry conversion processing, dynamic range conversion processing, and the like on the decoded video information. In addition, the video decoder 145S performs processing such as resolution conversion (up/down conversion) based on the control of the main control unit 101, and appropriately converts to UHD (horizontal 3840 pixels×vertical 2160 pixels) or HD (horizontal 1920 pixels×vertical 1080 pixels). pixels) or SD (horizontal 720 pixels×vertical 480 pixels). The video decoder 145S may output video data at other resolutions. The audio decoder 146S performs decoding processing, etc. of the compression-encoded audio information. Also, the audio decoder 146S performs down-mix processing and the like based on the control of the main control unit 101, and outputs audio data with the number of channels such as 22.2ch, 7.1ch, 5.1ch, and 2ch. Note that a plurality of video decoders 145S and audio decoders 146S may be provided in order to simultaneously perform a plurality of decoding processes of video data and audio data.

The data decoder 144S performs a process of generating an EPG based on program information data, a process of generating a data broadcast screen based on BML data, a process of controlling a cooperative application based on a broadcast communication cooperative 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. In addition, the data decoder 144S performs a process of decoding superimposed data to generate superimposed information, a process of decoding subtitle data to generate subtitle information, and the like.

The superimposing unit 147S, superimposing unit 148S, and superimposing unit 149S superimpose the video data output from the video decoder 145S and the EPG, data broadcast screen, etc. 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 150</b>S selects the resolution of video data based on the control of the main control unit 101 . Note that the functions of the superimposing section 147S, the superimposing section 148S, the superimposing section 149S, and the selecting section 150S may be integrated with the video selecting section 191. FIG. The function of the synthesizer 151S may be integrated with the voice selector 194. FIG.

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

Under the control of the main control unit 101, the selection unit 141U selects the packet stream input from the second tuner/demodulator 130T, the packet stream input from the third tuner/demodulator 130L, and the input from the fourth tuner/demodulator 130B. One of the packet streams is selected and output. The packet stream input from the second tuner/demodulator 130T, the third tuner/demodulator 130L, and the fourth tuner/demodulator 130B is, for example, an MMT packet stream or a TLV containing the MMT packet stream. This packet stream may be an MPEG-2 TS format packet stream that employs HEVC (High Efficiency Video Coding) or the like as a video compression method. The CA descrambler 142U performs descrambling processing of a predetermined scramble system encryption algorithm based on various control information related to conditional access superimposed on the packet stream.

The demultiplexer 143U is a stream decoder, and separates and extracts video data, audio data, superimposed text data, caption data, program information data, etc. based on various control information contained in the input packet stream. The separated and extracted video data is distributed to the video decoder 145U, the separated and extracted audio data is distributed to the audio decoder 146U, and the separated and extracted superimposed character data, caption data, program information data, etc. are distributed to the multimedia decoder 144U. . A packet stream (for example, MPEG-2 PS, MMT packet stream, etc.) obtained from a server device on the Internet 800 via the LAN communication unit 121 may be input to the demultiplexing unit 143U. Further, the demultiplexing unit 143U can externally output the packet stream input from the second tuner/demodulator 130T, the third tuner/demodulator 130L, or the fourth tuner/demodulator 130B via the digital interface unit 125. It is possible to input a packet stream obtained from the outside via the digital interface unit 125 .

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

The video decoder 145U, the audio decoder 146U, the superimposing unit 147U, the superimposing unit 148U, the superimposing unit 149U, the synthesizing unit 151U, and the selecting unit 150U are the video decoder 145S, the audio decoder 146S, the superimposing unit 147S, the superimposing unit 148S, and the superimposing unit 149S, respectively. , the combining unit 151S, and the selecting unit 150S. These are the video decoder 145S, the audio decoder 146S, the superimposing unit 147S, the superimposing unit 148S, the superimposing unit 149S, the synthesizing unit 151S, and the selecting unit 150S in FIG. The video decoder 145U, the audio decoder 146U, the superimposing unit 147U, the superimposing unit 148U, the superimposing unit 149U, the synthesizing unit 151U, and the selecting unit 150U will be explained separately, so separate detailed explanations will be omitted.

[Software Configuration of Broadcast Receiver]
FIG. 2H is a software configuration diagram of the broadcast receiving apparatus 100, and shows an example of the software configuration in the storage (accumulation) section 110 (or ROM 103, hereinafter the same) and RAM 104. As shown in FIG. Storage unit 110 stores basic operation program 1001 , reception function program 1002 , browser program 1003 , content management program 1004 and other operation programs 1009 . The storage unit 110 also stores content storage area 1011 that stores content data such as moving images, still images, and audio, and authentication information that is used for communication and cooperation with external mobile terminal devices, server devices, and the like. An authentication information storage area 1012 and various information storage areas 1019 for storing other various information are provided.

A basic operation program 1001 stored in the storage unit 110 is loaded into the RAM 104, and the main control unit 101 executes the loaded basic operation program to configure a basic operation control unit 1101. FIG. The receiving function program 1002, the browser program 1003, and the content management program 1004 stored in the storage unit 110 are developed in the RAM 104, and the main control unit 101 executes the expanded operation programs to receive A function control unit 1102, a browser engine 1103, and a content management unit 1104 are configured. The RAM 104 also includes a temporary storage area 1200 that temporarily holds data created during execution of each operating program as needed.

In the following description, for the sake of simplicity, the main control unit 101 develops the basic operation program 1001 stored in the storage unit 110 in the RAM 104 and executes it to control each operation block. It is assumed that the operation control unit 1101 controls each operation block. Similar descriptions are made for other operating programs.

The reception function control unit 1102 performs basic control of the broadcast reception function of the broadcast receiving apparatus 100, the broadcast communication cooperation function, and the like. In particular, the channel selection/demodulation unit 1102a performs channel selection processing and TMCC information in the first tuner/demodulation unit 130C, the second tuner/demodulation unit 130T, the third tuner/demodulation unit 130L, the fourth tuner/demodulation unit 130B, and the like. It mainly controls acquisition processing, demodulation processing, and the like. The stream reproduction control unit 1102b performs layer division processing, error correction decoding processing, energy It mainly controls despreading processing, stream reproduction processing, and the like. The AV decoding unit 1102c mainly controls demultiplexing processing (stream decoding processing), video data decoding processing, audio data decoding processing, etc. in the first decoder unit 140S, the second decoder unit 140U, and the like. The multimedia (MM) data reproduction unit 1102d performs BML data reproduction processing, superimposed text data decoding processing, caption data decoding processing, and communication cooperation application control processing in the first decoder unit 140S, and HTML data reproduction processing in the second decoder unit 140U. , multimedia screen generation processing, control processing of communication cooperation applications, etc. The EPG generation unit 1102e mainly controls EPG generation processing and display processing of the generated EPG in the first decoder unit 140S and the second decoder unit 140U. The presentation processing unit 1102f controls colorimetry conversion processing, dynamic range conversion processing, resolution conversion processing, audio down-mixing processing, etc. in the first decoder unit 140S and the second decoder unit 140U, and controls the video selection unit 191 and the audio selection unit 194. etc. are controlled.

The BML browser 1103a and HTML browser 1103b of the browser engine 1103 interpret BML documents and HTML documents during the above-described BML data reproduction processing and HTML data reproduction processing, and perform data broadcasting screen generation processing and multimedia screen generation processing. .

The content management unit 1104 manages time schedules and execution controls when making recording reservations and viewing reservations for broadcast programs, and manages copyrights when outputting broadcast programs, recorded programs, etc. from the digital interface unit 125, LAN communication unit 121, etc. Management and expiration date management of linked applications acquired based on the broadcasting and communication linking function.

Each operation program may be stored in advance in the storage unit 110 and/or the ROM 103 at the time of product shipment, or may be acquired from a server device on the Internet 800 via the LAN communication unit 121 or the like after product shipment. . Also, each operation program stored in a memory card, an optical disk, or the like may be acquired via the expansion interface section 124 or the like. Each operation program may be newly acquired or updated via broadcast waves.

[Broadcast station server configuration]
FIG. 3A is an example of the internal configuration of the broadcasting station server 400. As shown in FIG. The broadcasting station server 400 includes a main control section 401 , a system bus 402 , a RAM 404 , a storage section 410 , a LAN communication section 421 and a digital broadcasting signal transmission section 460 .

The main control section 401 is a microprocessor unit that controls the entire broadcasting station server 400 according to a predetermined operation program. A system bus 402 is a communication path for transmitting and receiving various data and commands between the main control unit 401 and each operation block in the broadcasting station server 400 . A RAM 404 serves as a work area when each operation program is executed.

The storage unit 410 stores a basic operation program 4001 , a content management/distribution program 4002 and a content transmission program 4003 , and further comprises a content data storage area 4011 and metadata storage area 4012 . A content data storage area 4011 stores content data of each broadcast program broadcast by a broadcasting station. The metadata storage area 4012 stores metadata such as the program title, program ID, program outline, performers, broadcast date and time of each broadcast program.

Basic operation program 4001 and content management/distribution program 4002 and content transmission program 4003 stored in storage unit 410 are developed in RAM 404, and main control unit 401 executes the expanded basic operation program and content management/distribution program. Basic operation control section 4101, content management/distribution control section 4102, and content transmission control section 4103 are configured by executing the distribution program and the content transmission program.

In the following description, for the sake of simplicity, the basic operation program 4001 stored in the storage unit 410 is loaded into the RAM 404 and executed by the main control unit 401 to control each operation block. It is assumed that the operation control unit 4101 controls each operation block. Similar descriptions are made for other operating programs.

The content management/distribution control unit 4102 manages the content data, metadata, etc. stored in the content data storage area 4011 and the metadata storage area 4012, and provides the content data, metadata, etc. to the service provider based on the contract. Provide control. Furthermore, the content management/distribution control unit 4102 performs authentication processing of the service provider server 500 as necessary when providing content data, metadata, and the like to the service provider.

Content transmission control unit 4103 includes content data of broadcast programs stored in content data storage area 4011, program titles and program IDs of broadcast programs stored in metadata storage area 4012, program content copy control information, and the like. Time schedule management and the like are performed when the stream is transmitted via the digital broadcast signal transmission unit 460 .

The LAN communication unit 421 is connected to the Internet 800 and communicates with the service provider server 500 on the Internet 800 and other communication devices. The LAN communication unit 421 includes an encoding circuit, a decoding circuit, and the like. The digital broadcast signal transmission unit 460 performs processing such as modulation on a stream composed of content data of each broadcast program stored in the content data storage area 4011, program information data, etc. Send out as broadcast waves.

[Configuration of service provider server]
FIG. 3B is an example of the internal configuration of the service provider server 500. As shown in FIG. The service provider server 500 includes a main control section 501 , a system bus 502 , a RAM 504 , a storage section 510 and a LAN communication section 521 .

The main control unit 501 is a microprocessor unit that controls the entire service provider server 500 according to a predetermined operating program. A system bus 502 is a communication path for transmitting and receiving various data and commands between the main control unit 501 and each operation block in the service provider server 500 . A RAM 504 serves as 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 . The content data storage area 5011 and the metadata storage area 5012 store content data, metadata, etc. provided from the broadcasting station server 400, content produced by service providers, metadata related to the content, and the like. The application storage area 5013 stores applications (operating programs and/or various data, etc.) necessary for realizing each service of the broadcast-communication cooperation system to be distributed in response to requests from each television receiver.

Further, the basic operation program 5001, the content management/distribution program 5002, and the application management/distribution program 5003 stored in the storage unit 510 are expanded in the RAM 504, and furthermore, the main control unit 501 executes the expanded basic operation program and content. By executing the management/distribution program and the application management/distribution program, a basic operation control section 5101, a content management/distribution control section 5102, and an application management/distribution control section 5103 are configured.

In the following description, for the sake of simplicity, the main control unit 501 expands the basic operation program 5001 stored in the storage unit 510 into the RAM 504 and executes it to control each operation block. It is assumed that the operation control unit 5101 controls each operation block. Similar descriptions are made for other operating programs.

Content management/distribution control unit 5102 acquires content data, metadata, etc. from broadcasting station server 400, manages content data, metadata, etc. stored in content data storage area 5011 and metadata storage area 5012, and performs various functions. It controls distribution of the content data, metadata, etc. to the television receiver. Also, the application management/distribution control unit 5103 manages each application stored in the application storage area 5013 and controls distribution of each application in response to a request from each television receiver. Furthermore, the application management/distribution control unit 5103 performs authentication processing of the television receivers as necessary when distributing each application to each television receiver.

The LAN communication unit 521 is connected to the Internet 800 and communicates with the broadcasting station server 400 on the Internet 800 and other communication devices. It also communicates with the broadcast receiving device 100 and the mobile information terminal 700 via the router device 800R. The LAN communication unit 521 includes an encoding circuit, a decoding circuit, and the like.

[Hardware configuration of portable information terminal]
FIG. 3C is a block diagram showing an example of the internal configuration of portable information terminal 700. As shown in FIG. The portable information terminal 700 includes a main control unit 701, a system bus 702, a ROM 703, a RAM 704, a storage unit 710, a communication processing unit 720, an extended interface unit 724, an operation unit 730, an image processing unit 740, an audio processing unit 750, and a sensor unit 760. is configured with

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

A ROM 703 is a non-volatile memory storing a basic operating program such as an operating system and other operating programs, and a rewritable ROM such as an EEPROM or a flash ROM is used. Further, the ROM 703 stores operation setting values and the like necessary for the operation of the portable information terminal 700 . A RAM 704 serves as a work area for executing the basic operation program and other operation programs. The ROM 703 and RAM 704 may be integrated with the main control section 701 . Also, the ROM 703 may be configured to use a partial storage area in the storage unit 710 instead of being configured independently as shown in FIG. 3C.

The storage unit 710 stores an operation program and operation setting values of the mobile information terminal 700, personal information of the user of the mobile information terminal 700, and the like. Further, it is possible to store an operation program downloaded via the Internet 800 and various data created by the operation program. In addition, content such as moving images, still images, and sounds downloaded via the Internet 800 can also be stored. All or part of the functions of the ROM 703 may be replaced by a partial area of the storage unit 710 . Moreover, the storage unit 710 needs to retain stored information even when power is not supplied to the portable information terminal 700 from the outside. Therefore, for the storage unit 710, for example, devices such as semiconductor element memories such as flash ROMs and SSDs, magnetic disk drives such as HDDs, and the like are used.

The operation programs stored in the ROM 703 and the storage unit 710 can be added, updated, and expanded by downloading from each server device on the Internet 800 .

The communication processing section 720 includes a LAN communication section 721 , a mobile telephone network communication section 722 and an NFC communication section 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 on the Internet 800 and other communication devices. The connection with the router device 800R is performed by wireless connection such as Wi-Fi (registered trademark). The mobile telephone network communication unit 722 performs telephone communication (phone call) and data transmission/reception by wireless communication with the base station 600B of the mobile telephone communication network. The NFC communication unit 723 performs wireless communication with a corresponding reader/writer when in close proximity. The LAN communication unit 721, the mobile phone network communication unit 722, and the NFC communication unit 723 each include an encoding circuit, a decoding circuit, an antenna, and the like. Also, the communication processing unit 720 may further include other communication units such as a BlueTooth (registered trademark) communication unit and an infrared communication unit.

The extended interface unit 724 is a group of interfaces for extending the functions of the mobile information terminal 700, and in this embodiment, it is assumed to be composed of a video/audio interface, a USB interface, a memory interface, and the like. The video/audio interface inputs video/audio signals from an external video/audio output device, outputs video/audio signals to an external video/audio input device, and the like. The USB interface may be connected to a PC or the like to transmit and receive data, and may be used to connect a keyboard or other USB devices. A memory interface connects a memory card or other memory medium to transmit and receive data.

The operation unit 730 is an instruction input unit for inputting an operation instruction to the portable information terminal 700, and in this embodiment, is composed of a touch panel 730T arranged over the display unit 741 and operation keys 730K arranged with button switches. but may consist of only one of them. The portable information terminal 700 may be operated using a keyboard or the like connected to the extended interface section 724 . The portable information terminal 700 may be operated using a separate terminal device connected by wired communication or wireless communication. That is, the mobile information terminal 700 may be operated from the broadcast receiving device 100 . Further, the display portion 741 may have a touch panel function as described above.

The image processing section 740 includes a display section 741 , an image signal processing section 742 , a first image input section 743 and a second image input section 744 . The display unit 741 is a display device such as a liquid crystal panel, for example, and provides the user of the mobile 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 the display unit 741 is driven based on the image data input to the video RAM. Further, the image signal processing unit 742 has a function of performing format conversion, superimposition processing of menus and other OSD signals, etc., as necessary. The first image input unit 743 and the second image input unit 744 convert the light input from the lens into an electrical signal using an electronic device such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) sensor. , is a camera unit that inputs image data of surroundings and objects.

The audio processing unit 750 is composed of an audio output unit 751 , an audio signal processing unit 752 and an audio input unit 753 . The audio output unit 751 is a speaker, and provides the user of the portable information terminal 700 with the audio signal processed by the audio signal processing unit 752 . A voice input unit 753 is a microphone that converts a user's voice or the like into voice data and inputs the voice data.

The sensor unit 760 is a group of sensors for detecting the state of the mobile information terminal 700, and in this embodiment includes a GPS receiver unit 761, a gyro sensor 762, a geomagnetic sensor 763, an acceleration sensor 764, an illuminance sensor 765, and a proximity sensor 766. is configured with These sensors make it possible to detect the position, tilt, direction, movement, ambient brightness, proximity of surrounding objects, and the like of the mobile information terminal 700 . Moreover, the mobile information terminal 700 may further include other sensors such as an air pressure sensor.

The mobile information terminal 700 may be a mobile phone, a smart phone, a tablet terminal, or the like, a PDA (Personal Digital Assistant), a notebook PC, a digital still camera, or a video camera capable of shooting moving images. , a portable game machine, a navigation device, or other portable digital equipment.

Note that the configuration example of the mobile information terminal 700 shown in FIG. 3C includes components such as the sensor unit 760 that are not essential to this embodiment. without compromising the effect of Moreover, the mobile information terminal 700 may further include components (not shown) such as a digital broadcast reception function and an electronic money payment function.

[Software configuration of portable information terminal]
FIG. 3D is a software configuration diagram of the portable information terminal 700 and shows an example of software configuration in the ROM 703, the RAM 704, and the storage unit 710. As shown in FIG. The ROM 703 stores a basic operation program 7001 and other operation programs. The storage unit 710 stores a cooperation control program 7002 and other operating programs. The storage unit 710 also includes a content storage area 7200 for storing content data such as moving images, still images, and audio, and an authentication information storage area 7300 for storing authentication information required when accessing the television receiver and each server device. , and various information storage areas for storing various other information.

A basic operation program 7001 stored in the ROM 703 is loaded into the RAM 704, and the main control unit 701 executes the loaded basic operation program, whereby a basic operation execution unit 7101 is constructed. Similarly, the cooperative control program 7002 stored in the storage unit 710 is expanded in the RAM 704, and the main control unit 701 executes the expanded cooperative control program to configure the cooperative control execution unit 7102. The RAM 704 also has a temporary storage area for temporarily holding data created during execution of each operation program as needed.

In the following description, for the sake of simplicity, the basic operation program 7001 stored in the ROM 703 is loaded into the RAM 704 and executed by the main control unit 701 to control each operation block. It is assumed that the unit 7101 controls each operation block. Similar descriptions are made for other operating programs.

The cooperation control execution unit 7102 manages device authentication, connection, transmission and reception of each data, etc. when the portable information terminal 700 performs cooperative operation with the television receiver. Also, the cooperation control execution unit 7102 has a browser engine function for executing an application linked with the television receiver.

Each operating program may be stored in ROM 703 and/or storage unit 710 in advance at the time of product shipment, or may be downloaded from a server device on Internet 800 via LAN communication unit 721 or mobile telephone network communication unit after product shipment. 722 may be obtained. Also, each operation program stored in a memory card, an optical disc, or the like may be acquired via the expansion interface section 724 or the like.

[Broadcast waves of digital broadcasting]
Here, an example of digital broadcasting broadcast waves received by the broadcast receiving apparatus according to the embodiment of the present invention will be described.

Broadcast receiving apparatus 100 is capable of receiving terrestrial digital broadcasting services that share at least some specifications with the ISDB-T (Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting) system. Specifically, dual-polarization terrestrial digital broadcasting and single-polarization terrestrial digital broadcasting that can be received by the second tuner/demodulator 130T in FIG. Digital terrestrial broadcasting. Also, the hierarchical division multiplexing digital terrestrial broadcasting that can be received by the third tuner/demodulator 130L is an advanced digital terrestrial broadcasting that shares some specifications with the ISDB-T system. Current terrestrial digital broadcasting that can be received by the first tuner/demodulator 130C is ISDB-T digital terrestrial broadcasting. Advanced BS digital broadcasting and advanced CS digital broadcasting that can be received by the fourth tuner/demodulator 130B are digital broadcasting different from the ISDB-T system.

Here, using FIG. 4A and subsequent figures, the dual-polarization terrestrial digital broadcasting, single-polarized terrestrial digital broadcasting, and hierarchical division multiplexing terrestrial digital broadcasting according to the present embodiment are multi-carrier transmission systems in the same way as the ISDB-T system. OFDM (Orthogonal Frequency Division Multiplexing), which is one of the methods, is adopted. Since OFDM is a multi-carrier system, the symbol length is long, and it is effective to add a redundant portion in the time axis direction called a guard interval, and it is possible to reduce the effects of multipath within the guard interval. is. For this reason, OFDM can realize an SFN (Single Frequency Network), enabling effective use of frequencies.

In the dual polarization terrestrial broadcasting, single polarized terrestrial digital broadcasting, and hierarchical division multiplexing terrestrial digital broadcasting according to the present embodiment, OFDM carriers are divided into groups called segments as in the ISDB-T system. As shown in 4A, one channel bandwidth of the digital broadcasting service consists of 13 segments. The central portion of the band is the position of segment 0, and segment numbers (0 to 12) are assigned sequentially above and below this. Channel coding of the dual-polarization digital terrestrial broadcasting, single-polarization digital terrestrial broadcasting, and hierarchical division multiplexing digital terrestrial broadcasting according to the present embodiment is performed in units of OFDM segments. For this reason, it is possible to define hierarchical transmissions, for example, within the bandwidth of one television channel, some OFDM segments can be allocated to fixed reception services and the rest to mobile reception services. . In layered transmission, each layer is composed of one or more OFDM segments, and parameters such as carrier modulation scheme, inner code coding rate, time interleaving length, etc. can be set for each layer. Note that the number of hierarchies may be set arbitrarily, for example, up to three hierarchies may be set. FIG. 4B shows an example of hierarchical allocation of OFDM segments when the number of hierarchical layers is three or two. In the example of (1) in FIG. 4B, the number of layers is 3, the A layer is composed of 1 segment (segment 0), the B layer is composed of 7 segments (segments 1 to 7), and the C layer is composed of 5 segments. (segments 8-12). In the example of (2) in FIG. 4B, the number of layers is 3, the A layer is composed of 1 segment (segment 0), the B layer is composed of 5 segments (segments 1 to 5), and the C layer is composed of 7 segments. (segments 6-12). In the example of (3) in FIG. 4B, the number of hierarchies is two, the A hierarchy is composed of one segment (segment 0), and the B hierarchy is composed of 12 segments (segments 1 to 12). The number of OFDM segments in each layer, channel coding parameters, etc. are determined according to organization information, and are transmitted by TMCC signals, which are control information for assisting the operation of the receiver.

It should be noted that the following examples are possible as usage examples of the segment tier assignments of (1), (2), and (3) in FIG. 4B.

For example, the hierarchical assignment of (1) in FIG. 4B can be used in the dual polarization terrestrial digital broadcasting according to the present embodiment, and the same segment hierarchical assignment may be used for both horizontal polarization and vertical polarization. Specifically, the above-described one segment of horizontally polarized waves as the A layer may be used to transmit the mobile receiving service of the current terrestrial digital broadcasting. Note that the current terrestrial digital broadcasting mobile reception service may transmit the same service in the above one segment of vertical polarization. In this case, this is also treated as the A layer. In addition, as the B layer, the 7 segments of horizontally polarized waves may be used to transmit a terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels, which is the current terrestrial digital broadcasting. Incidentally, the digital terrestrial broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels may transmit the same service in the above 7 segments of vertical polarization. In this case, this is also treated as the B layer. In addition, advanced terrestrial digital broadcasting service that can transmit video with a maximum resolution exceeding 1920 horizontal pixels × 1080 vertical pixels in the above 5 segments of both horizontal polarization and vertical polarization as C layer, total 10 segments. may be configured to transmit the Details of the transmission will be described later. The transmission wave assigned to the segment hierarchy can be received by the second tuner/demodulator 130T of the broadcast receiving apparatus 100, for example.

Also, the hierarchical assignment of (1) in FIG. 4B can be used in single-polarized terrestrial digital broadcasting according to the present embodiment. Specifically, the current terrestrial digital broadcasting mobile reception service can be transmitted in the above one segment as the A layer. In addition, as the B layer, the above 7 segments may be used to transmit a terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels, which is the current terrestrial digital broadcasting. Furthermore, as the C layer, it may be configured to transmit an advanced digital terrestrial broadcasting service capable of transmitting video having a maximum resolution of more than 1920 horizontal pixels×1080 vertical pixels in the above 5 segments. In this case, in layer C, a carrier modulation method, an error correction coding method, a video coding method, etc., which are more efficient than the current terrestrial digital broadcasting, are used. Details of the transmission will be described later. The transmission wave assigned to the segment hierarchy can be received by the second tuner/demodulator 130T of the broadcast receiving apparatus 100, for example.

As an example not shown, in the single-polarized terrestrial digital broadcasting according to the present embodiment, one segment of the A layer transmits the mobile reception service of the current terrestrial digital broadcasting, and eight segments of the B layer transmit the current terrestrial digital broadcasting. Transmits digital terrestrial broadcasting services that transmit video with a maximum resolution of 1920 horizontal pixels x 1080 vertical pixels, and video with a maximum resolution of more than 1920 horizontal pixels x 1080 vertical pixels in the 4 segments of C layer. may be configured to transmit an advanced terrestrial digital broadcasting service capable of transmitting . Also in this case, in layer C, a carrier modulation method, an error correction coding method, a video coding method, and the like, which are more efficient than the current terrestrial digital broadcasting, are used. Details of the transmission will be described later. The transmission wave assigned to the segment hierarchy can be received by the second tuner/demodulator 130T of the broadcast receiving apparatus 100, for example.

For example, the hierarchical assignment of (2) in FIG. 4B can be used as a different example from (1) in FIG. The same segment hierarchy allocation can be used. Specifically, the above-described one segment of horizontally polarized waves as the A layer may be used to transmit the mobile receiving service of the current terrestrial digital broadcasting. Note that the current terrestrial digital broadcasting mobile reception service may transmit the same service in the above one segment of vertical polarization. In this case, this is also treated as the A layer. In addition, advanced terrestrial digital broadcasting service capable of transmitting video with a maximum resolution exceeding horizontal 1920 pixels × vertical 1080 pixels in the above 5 segments of both horizontal polarization and vertical polarization as B layer, total 10 segments. may be configured to transmit the Also, as the C layer, it is possible to transmit a terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels, which is the current terrestrial digital broadcasting, using the above 7 segments of horizontally polarized waves. Incidentally, the digital terrestrial broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels may transmit the same service in the above 7 segments of vertical polarization. In this case, this is also treated as the C layer. Details of the transmission will be described later. The transmission wave assigned to the segment hierarchy can be received by, for example, the second tuner/demodulator 130T of the broadcast receiving apparatus 100 of this embodiment.

Also, the hierarchical assignment of (2) in FIG. 4B can be used as an example different from (1) in FIG. 4B in the single-polarized terrestrial digital broadcasting according to the present embodiment. Specifically, the current terrestrial digital broadcasting mobile reception service can be transmitted in the above one segment as the A layer. Further, as the B layer, an advanced digital terrestrial broadcasting service capable of transmitting video with a maximum resolution of more than 1920 horizontal pixels×1080 vertical pixels in the above 5 segments may be transmitted. In this case, in layer B, a carrier modulation method, an error correction coding method, a video coding method, etc., which are more efficient than the current terrestrial digital broadcasting, are used. Also, as the C layer, it is possible to transmit a digital terrestrial broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels, which is the current terrestrial digital broadcasting in the above 7 segments. Details of the transmission will be described later. The transmission wave assigned to the segment hierarchy can be received by, for example, the second tuner/demodulator 130T of the broadcast receiving apparatus 100 of this embodiment.

For example, the hierarchical assignment of (3) in FIG. 4B can be used in hierarchical division multiplexing digital terrestrial broadcasting according to the present embodiment and current digital terrestrial broadcasting. Specifically, when used in hierarchical division multiplexing digital terrestrial broadcasting, the mobile receiving service of the current digital terrestrial broadcasting can be transmitted in one segment in the figure as the A layer. In addition, as the B layer, advanced terrestrial digital broadcasting services that can transmit video with a maximum resolution exceeding 1920 horizontal pixels × 1080 vertical pixels in the 12 segments shown in the figure and a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels It may also be configured to transmit the current terrestrial digital broadcasting service that transmits video to be transmitted. The transmission wave assigned to the segment hierarchy can be received by, for example, the third tuner/demodulator 130L of the broadcast receiving apparatus 100 of this embodiment. When used in the current terrestrial digital broadcasting, it suffices to transmit the mobile reception service of the current terrestrial digital broadcasting in one segment in the figure as hierarchy A, and the current terrestrial digital broadcasting in 12 segments in the figure as hierarchy B. A terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 pixels in the horizontal direction and 1080 pixels in the vertical direction may be transmitted. The transmission wave assigned to the segment hierarchy can be received by, for example, the first tuner/demodulator 130C of the broadcast receiving apparatus 100 of this embodiment.

FIG. 4C shows a system on the broadcasting station side that realizes processing for generating OFDM transmission waves, which are digital broadcasting waves for dual polarization terrestrial broadcasting, single polarized terrestrial digital broadcasting, and hierarchical division multiplexing terrestrial digital broadcasting according to the present embodiment. Here is an example. An 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 encoded by the information source encoding unit 411, performs processing corresponding to conditional access as appropriate, and outputs as a packet stream. do. A plurality of information source coding units 411 and multiplexing/conditional access processing units 415 can exist in parallel to generate a plurality of packet streams. The transmission path coding unit 416 remultiplexes the plurality of packet streams into one packet stream, performs transmission path coding processing, and outputs it as an OFDM transmission wave. Although the configuration shown in FIG. 4C differs in the details of the information source coding and channel coding schemes, the configuration for realizing OFDM transmission wave generation processing is common to the ISDB-T scheme. Therefore, of the plurality of information source encoding units 411 and multiplexing units/conditional access processing units 415, some are configured for ISDB-T digital terrestrial broadcasting services, and some are configured for advanced terrestrial digital broadcasting services. , and a plurality of packet streams of different digital terrestrial broadcasting services may be multiplexed by the transmission path coding unit 416. FIG. When the multiplexing unit/conditional access processing unit 415 is configured for the ISDB-T system digital terrestrial broadcasting service, MPEG-2TS, which is a TSP (Transport Stream Packet) stream defined by MPEG-2 Systems, is used. should be generated. Further, when the multiplexing unit/conditional access processing unit 415 is configured for advanced terrestrial digital broadcasting services, MMT packet streams, TLV streams containing MMT packets, and TSP streams defined by other systems are used. should be generated. Of course, all of the plurality of information source coding units 411 and multiplexing/conditional access processing units 415 are configured for advanced terrestrial digital broadcasting services, and all packet streams multiplexed by the transmission line coding unit 416 are advanced. packet stream for terrestrial digital broadcasting service.

FIG. 4D shows an example of the configuration of the channel coding section 416. As shown in FIG.

First, (1) of FIG. 4D shows the configuration of the transmission path coding unit 416 when only the OFDM transmission wave of the digital broadcasting of the current terrestrial digital broadcasting service is generated. An OFDM transmission wave transmitted in this configuration has, for example, the segment configuration of (3) in FIG. 4B. The packet stream input from the multiplexing unit/conditional access processing unit 415 and subjected to re-multiplexing processing is added with error correction redundancy and subjected to various types of interleaving such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. Interleave processing is performed. After that, IFFT (Inverse Fast Fourier Transform) processing is performed along with the pilot signal, the TMCC signal, and the AC signal, and after a guard interval is added, the signal is subjected to orthogonal modulation to become an OFDM transmission wave. Outer code processing, power spreading processing, byte interleaving, inner code processing, bit interleaving processing, and mapping processing are configured so that they can be processed separately for each layer such as A layer and B layer. In addition, the digital broadcasting of the current terrestrial digital broadcasting service has two layers for operation, but since transmission is possible up to three layers, FIG. 4D (1) shows an example of three layers. Mapping processing is carrier modulation processing. The packet stream input from the multiplexer/conditional access processor 415 may be multiplexed with TMCC information, mode, guard interval ratio, and other information. Note that the packet stream input to the channel coding unit 416 may be a TSP stream defined by MPEG-2 Systems, as described above. The OFDM transmission wave generated by the configuration (1) in FIG. 4D can be received by, for example, the first tuner/demodulator 130C of the broadcast receiver 100 of this embodiment.

Next, (2) in FIG. 4D shows the configuration of the transmission line coding unit 416 when generating OFDM transmission waves for dual-polarization terrestrial digital broadcasting according to this embodiment. An OFDM transmission wave transmitted in this configuration has, for example, the segment configuration of (1) or (2) in FIG. 4B. In (2) of FIG. 4D as well, the packet stream input from the multiplexing unit/conditional access processing unit 415 and subjected to re-multiplexing processing is added with error correction redundancy, byte interleaved, bit interleaved, Various interleaving processes such as time interleaving and frequency interleaving are performed. After that, IFFT processing is performed along with the pilot signal, TMCC signal, and AC signal, and after guard interval addition processing is performed, the signal is subjected to orthogonal modulation to become an OFDM transmission wave.

In the configuration example of (2) in FIG. 4D, outer code processing, power spreading processing, byte interleaving, inner code processing, bit interleaving processing, mapping processing, and time interleaving are performed for each layer such as A layer, B layer, and C layer. are configured so that they can be processed separately. However, in the configuration example of (2) in FIG. 4D, not only the OFDM transmission wave of horizontal polarization (H) but also the OFDM transmission wave of vertical polarization (V) is generated, and the processing flow is divided into two systems. branch. When branching from the horizontal polarization (H) processing system to the vertical polarization (V) processing system, the same data as the horizontal polarization (H) processing system is branched to the vertical polarization (V) processing system. Whether data different from the processing system for horizontal polarization (H) is branched to the processing system for vertical polarization (V) or whether data is not branched to the processing system for vertical polarization (V) is shown in FIG. 4B. It can be made different for each layer corresponding to the segment configuration described in (1) or (2).

The processing of the outer code, inner code, mapping, etc. shown in the configuration of (2) in FIG. 4D is the processing of the configuration of (1) in FIG. 4D in addition to the processing compatible with the configuration of (1) in FIG. 4D. More advanced processing not employed in each processing can be used. Specifically, in the configuration of (2) in FIG. 4D, for the part where processing is performed for each layer, the current terrestrial digital broadcasting mobile reception service and video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels In the layer where the current terrestrial digital broadcasting service is transmitted, processing compatible with the configuration of (1) in FIG. 4D is performed for processing such as outer code, inner code, and mapping. On the other hand, in the configuration of (2) in FIG. 4D, for the part where processing is performed for each layer, advanced terrestrial digital that can transmit video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels Layers for transmitting broadcast services may be configured to use higher-level processing that is not used in each processing of configuration (1) in FIG. 4D for processing such as outer code, inner code, and mapping.

In the dual-polarization terrestrial digital broadcasting according to the present embodiment, it is possible to switch the hierarchy and the allocation of the terrestrial digital broadcasting service to be transmitted according to the TMCC information described later. It is desirable to configure so that processing such as coding and mapping can be switched by TMCC information.

In addition, byte interleave, bit interleave, and time interleave are the current terrestrial digital broadcast layer for transmission of advanced terrestrial digital broadcasting services capable of transmitting video with a maximum resolution exceeding 1920 pixels horizontally by 1080 pixels vertically. A process compatible with the service may be performed, or a more advanced different process may be performed. Alternatively, a part of the interleaving may be omitted for a layer that transmits advanced terrestrial digital broadcasting services.

In addition, in the configuration of (2) in FIG. 4D, the current terrestrial digital broadcasting mobile reception service and the current terrestrial digital broadcasting service that transmits video with a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically are transmitted. The input stream serving as the source of the may be a TSP stream defined by MPEG-2 Systems, which is adopted in the current terrestrial digital broadcasting, among the packet streams input to the transmission path coding unit 416 . The input stream that is the source of the layer that transmits the advanced digital terrestrial broadcasting service in the configuration (2) of FIG. It may be a stream defined by a system other than the TSP stream defined by MPEG-2 Systems, such as TLV. However, a TSP stream defined by MPEG-2 Systems may be adopted for advanced digital terrestrial broadcasting services.

In the configuration (2) of FIG. 4D explained above, until the OFDM transmission wave is generated from the input stream, the mobile reception service of the current terrestrial digital broadcasting and the image with the maximum resolution of 1920 horizontal pixels × 1080 vertical pixels are used. In the layer where the current digital terrestrial broadcasting service is transmitted, stream formats and processes compatible with the current digital terrestrial broadcasting are maintained. As a result, one of the horizontally polarized OFDM transmission waves and the vertically polarized OFDM transmission waves generated by the configuration (2) in FIG. Even if the current digital terrestrial broadcasting service for mobile units and the current digital terrestrial broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels are transmitted, the level of the current digital terrestrial broadcasting service Broadcast signals can be received and demodulated correctly.

In addition, in the configuration of (2) in FIG. 4D , in the hierarchy using both segments of the horizontally polarized OFDM transmission wave and the vertically polarized OFDM transmission wave, the maximum number of pixels exceeding 1920 pixels in the horizontal direction×1080 pixels in the vertical direction is A high-level digital terrestrial broadcasting service capable of transmitting high-resolution video can be transmitted, and the broadcast signal of the high-level digital terrestrial broadcasting service can be received and demodulated by the broadcast receiving apparatus 100 according to the embodiment of the present invention. It becomes possible.

That is, with the configuration (2) in FIG. 4D, digital broadcasting can be suitably received and demodulated by both a broadcast receiving device compatible with advanced digital terrestrial broadcasting services and a receiving device for existing current digital terrestrial broadcasting services. Digital broadcast waves can be generated.

When generating an OFDM transmission wave for single-polarization terrestrial digital broadcasting according to the present embodiment, the transmission line coding unit 416 shown in (2) of FIG. Only one of the generating system and the system for generating the OFDM transmission wave of vertical polarization (V) may be used. In this case as well, the OFDM transmission wave transmitted in this configuration has, for example, the segment configuration of (1) or (2) in FIG. In contrast, only one of the horizontally polarized OFDM transmission wave and the vertically polarized OFDM transmission wave is transmitted. Other configurations and operations are the same as in the case of generating OFDM transmission waves for dual-polarization terrestrial digital broadcasting described above.

Next, (3) in FIG. 4D shows the configuration of the transmission line coding unit 416 when generating OFDM transmission waves for hierarchical division multiplexing digital terrestrial broadcasting according to this embodiment. In (3) of FIG. 4D as well, the packet stream input from the multiplexing unit/conditional reception processing unit 415 and subjected to re-multiplexing processing is added with error correction redundancy, byte interleaved, bit interleaved, Various interleaving processes such as time interleaving and frequency interleaving are performed. After that, IFFT processing is performed along with the pilot signal, TMCC signal, and AC signal, and after adding a guard interval, the signal is subjected to quadrature modulation to become an OFDM transmission wave.

However, in the configuration of (3) in FIG. 4D, the modulated waves transmitted in the upper layer and the modulated waves transmitted in the lower layer are generated respectively, and after multiplexing, the OFDM transmission wave, which is a digital broadcast wave, is generated. . The processing system shown on the upper side of the configuration of (3) in FIG. 4D is a processing system for generating modulated waves transmitted in the upper layer, and the processing system shown on the lower side is the modulation transmitted in the lower layer. A processing system for generating waves. The data transmitted in the processing system for generating the modulated wave transmitted in the upper hierarchy of (3) in FIG. Various processes in the processing system for generating modulated waves transmitted in the upper layer of (3) in FIG. 4D are the various processes in (1) in FIG. 4D It is a process that is the same as or compatible with the process. The modulated wave transmitted in the upper layer of (3) in FIG. 4D has, for example, the segment configuration of (3) in FIG. 4B, similar to the transmitted wave in (1) of FIG. 4D. Therefore, the modulated wave transmitted in the upper layer of (3) in FIG. It is a digital broadcasting wave compatible with the service. On the other hand, the data transmitted in the processing system for generating the modulated wave transmitted in the lower layer of (3) in FIG. It is an advanced terrestrial digital broadcasting service that can transmit video, and uses more advanced processing that is not adopted in each processing of the configuration (1) in FIG. 4D, such as outer code, inner code, mapping, etc. It should be configured as follows.

The modulated wave transmitted in the lower layer of (3) in FIG. 4D is, for example, an advanced layer capable of transmitting video with a maximum resolution exceeding 1920 horizontal pixels × 1080 vertical pixels with all 13 segments as A layer. It may be assigned to the terrestrial digital broadcasting service. Alternatively, with the segment configuration of (3) in FIG. 4B, the current terrestrial digital broadcasting mobile reception service is transmitted on the A layer of 1 segment, and the B layer of 12 segments exceeds horizontal 1920 pixels × vertical 1080 pixels. A high-level digital terrestrial broadcasting service capable of transmitting video with the maximum resolution of the number of pixels may be transmitted. In the latter case, as in (2) of FIG. 4D, the processing may be switched for each layer such as layer A and layer B from outer code processing to time interleave processing. Similar to the description of (2) in FIG. 4D, in the layer that transmits the current terrestrial digital broadcasting mobile reception service, it is necessary to maintain processing compatible with the current terrestrial digital broadcasting.

In the configuration (3) in FIG. 4D, an OFDM transmission wave, which is a terrestrial digital broadcasting wave, is generated by multiplexing the modulated wave transmitted in the upper layer and the modulated wave transmitted in the lower layer. The technique of separating the modulated wave transmitted in the upper layer from the OFDM transmission wave is also installed in the existing receivers of the current terrestrial digital broadcasting service. Therefore, the broadcast signal of the current terrestrial digital broadcasting mobile reception service and the current terrestrial digital broadcasting service transmitting video with a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels contained in the modulated wave transmitted in the upper hierarchy is correctly received and demodulated by existing receivers for digital terrestrial broadcasting services. On the other hand, broadcast signals of advanced digital terrestrial broadcasting services capable of transmitting video with a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels included in the modulated waves transmitted in the lower layer are It is possible to receive and demodulate with the broadcast receiver 100 according to the embodiment of the invention.

That is, in the configuration of (3) in FIG. 4D, digital broadcasting can be suitably received and demodulated by both a broadcast receiving device compatible with advanced digital terrestrial broadcasting services and a receiving device for existing current digital terrestrial broadcasting services. Digital broadcast waves can be generated. Also, unlike the configuration (2) in FIG. 4D, the configuration (3) in FIG. 4D does not require the use of a plurality of polarized waves, and can more easily generate a receivable OFDM transmission wave.

In the OFDM transmission wave generation processing according to (1), (2), and (3) in FIG. 4D of this embodiment, compatibility with the distance between stations of SFN and resistance to Doppler shift in mobile reception, etc. are taken into consideration. and prepare three types of modes with different numbers of carriers. Note that another mode with a different number of carriers may be further prepared. The effective symbol length is longer in a 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 will be longer, making it possible to provide resistance to multipath with a long delay time difference. is. On the other hand, in a mode with a small number of carriers, the carrier spacing is widened, and it is possible to reduce the influence of inter-carrier interference due to Doppler shift that occurs in the case of mobile reception or the like.

In the OFDM transmission wave generation processing according to (1), (2), and (3) in FIG. 4D of the present embodiment, the carrier modulation method and the code of the inner code are Parameters such as conversion rate, time interleaving length, etc. can be set. FIG. 4E shows an example of transmission parameters in units of one segment of OFDM segments identified by the mode of the system according to this embodiment. It should be noted that the carrier modulation method in the figure refers to the modulation method of the "data" carrier. The SP signal, CP signal, TMCC signal, and AC signal employ a modulation scheme different from that of the "data" carrier. These signals are signals whose resistance to noise is more important than the amount of information. or DBPSK, that is, two-state), is used to improve resistance to noise.

Also, regarding the numbers of carriers, the numbers on the left side of the hatched lines are the values when QPSK, 16QAM, 64QAM, etc. are set as the carrier modulation method, and the numbers on the right side of the hatched lines are the values when DQPSK is set as the carrier modulation method. value. In the figure, the underlined parameters are not compatible with the current terrestrial digital broadcasting mobile reception service. Specifically, 256QAM, 1024QAM and 4096QAM, which are modulation methods for "data" carriers, are not adopted in current terrestrial digital broadcasting services. Therefore, in the processing in the hierarchy that requires compatibility with the current terrestrial digital broadcasting service in the OFDM broadcast wave generation processing according to (1), (2), and (3) in FIG. 4D of the present embodiment, "data" 256QAM, 1024QAM and 4096QAM of the carrier modulation method are not used. QPSK (4 states), 16QAM (16 states), 64QAM (state 64), 256QAM (256 states), 1024QAM (1024 states), or 4096QAM (4096 states) may be applied. Also, a modulation method different from these modulation methods may be adopted.

BPSK (number of states: 2), which is compatible with current terrestrial digital broadcasting services, may be used as the pilot symbol (SP or CP) carrier modulation method. DBPSK (number of states: 2), which is compatible with current terrestrial digital broadcasting services, may be used as the modulation method for AC carriers and TMCC carriers.

In addition, the LDPC code is not adopted as an inner code processing method in current terrestrial digital broadcasting services. Therefore, in the process in the hierarchy that requires compatibility with the current terrestrial digital broadcasting service in the OFDM broadcast wave generation process according to (1), (2), and (3) in FIG. 4D of the present embodiment, the LDPC code is don't use An LDPC code may be applied as an inner code to data transmitted in a layer corresponding to an advanced digital terrestrial broadcasting service. In addition, the BCH code is not adopted as an outer code processing method in current terrestrial digital broadcasting services. Therefore, in the process in the layer requiring compatibility with the current terrestrial digital broadcasting service in the OFDM broadcast wave generation process according to (1), (2), and (3) in FIG. 4D of this embodiment, the BCH code is don't use A BCH code may be applied as an outer code to data transmitted in a layer corresponding to an advanced digital terrestrial broadcasting service.

Also, FIG. 4F shows an example of transmission signal parameters in units of one physical channel (6 MHz bandwidth) of OFDM broadcast wave generation processing according to (1), (2), and (3) in FIG. 4D of this embodiment. . In the OFDM broadcast wave generation processing according to (1), (2), and (3) in FIG. 4D of the present embodiment, basically, for compatibility with the current terrestrial digital broadcasting service, In principle, parameters compatible with the current terrestrial digital broadcasting service are adopted for the parameters of . However, if all segments are assigned to advanced terrestrial digital broadcasting services in modulated waves transmitted in the lower layer of (3) in FIG. 4D, it is necessary to maintain compatibility with current terrestrial digital broadcasting services in the modulated waves. no. Therefore, in this case, parameters other than the parameters shown in FIG. 4F may be used for the modulated waves transmitted in the layer below (3) in FIG. 4D.

Next, the carrier of the OFDM transmission wave according to this embodiment will be explained. OFDM transmission wave carriers according to the present embodiment include carriers for transmitting data such as video and audio, carriers for transmitting pilot signals (SP, CP, AC1, AC2) serving as demodulation references, There is a carrier through which a TMCC signal, which is information such as carrier modulation format and convolutional coding rate, is transmitted. These transmissions use a number of carriers corresponding to 1/9 of the number of carriers per segment. In addition, a concatenated code is adopted for error correction, and a shortened Reed-Solomon (204, 188) code is used as the outer code, and punctured with a constraint length of 7 and a coding rate of 1/2 as the mother code for the inner code. A convolutional code is employed. Both the outer code and the inner code may use encoding different from that described above. The information rate varies depending on parameters such as carrier modulation format, convolutional coding rate and guard interval ratio.

Also, one frame is made up of 204 symbols, and an integer number of TSPs are included in one frame. Switching of transmission parameters is performed at the boundary of this frame.

Pilot signals serving as demodulation references include SP (Scattered Pilot), CP (Continual Pilot), AC (Auxiliary Channel) 1, and AC2. FIG. 4G shows an example of an arrangement image of pilot signals, etc. within a segment in the case of synchronous modulation (QPSK, 16QAM, 64QAM, 256QAM, 1024QAM, 4096QAM, etc.). An SP is inserted into a synchronous modulation segment and transmitted once every 12 carriers in the carrier number (frequency axis) direction and once every 4 symbols in the OFDM symbol number (time axis) direction. Since the amplitude and phase of the SP are known, it can be used as a reference for synchronous demodulation. FIG. 4H shows an example of an arrangement image of a pilot signal, etc. within a segment in the case of differential modulation (DQPSK, etc.). CP is a continuous signal inserted at the left end of the differential modulation segment and used for demodulation.

AC1 and AC2 carry information on the CP and, in addition to their role as pilot signals, are also used to transmit information for broadcasters. AC1 and AC2 may be used to transmit other information.

The arrangement images shown in FIGS. 4G and 4H are examples of mode 3, and the carrier numbers are 0 to 431. In mode 1 and mode 2, the carrier numbers are 0 to 107 and 0, respectively. to 215. In addition, carriers for transmitting AC1, AC2, and TMCC may be determined in advance for each segment. Carriers for transmitting AC1, AC2, and TMCC are randomly arranged in the frequency direction in order to reduce the influence of periodic dips in transmission path characteristics due to multipath.

[TMCC signal]
The TMCC signal transmits information (TMCC information) related to the demodulation operation of the receiver, such as the hierarchical structure and transmission parameters of the OFDM segment. A TMCC signal is transmitted using a carrier for TMCC transmission specified in each segment. FIG. 5A shows an example of bit allocation for TMCC carriers. A TMCC carrier consists of 204 bits (B0 to B203). B0 is the demodulation reference signal for the TMCC symbols and has a predetermined amplitude and phase reference. B1 to B16 are synchronizing signals, each consisting of a 16-bit word. Two types of synchronization signals, w0 and w1, are defined, and w0 and w1 are alternately transmitted for each frame. B17-B19 are used to identify the segment type, and identify whether each segment is a differential modulation section or a synchronous modulation section. TMCC information is described in B20 to B121. B122 to B203 are parity bits.

The TMCC information of the OFDM transmission wave according to the present embodiment includes, as an example, system identification, transmission parameter switching index, activation control signal (emergency warning broadcast activation flag), current information, next information, frequency conversion process identification, physical channel number It may be configured to include information for assisting demodulation and decoding operations of the receiver, such as identification, main signal identification, 4K signal transmission layer identification, additional layer transmission identification, and the like. The current information indicates the current hierarchical structure and transmission parameters, and the next information indicates the hierarchical structure and transmission parameters after switching. Switching of transmission parameters is performed on a frame-by-frame basis. FIG. 5B shows an example of bit allocation of TMCC information. Also, FIG. 5C shows an example of the configuration of transmission parameter information included in current information/next information. The concatenated transmission phase correction amount is control information used in cases such as ISDB for Terrestrial Sound Broadcasting (ISDB for Terrestrial Sound Broadcasting), which shares a common transmission method.

FIG. 5D shows an example of bit allocation for system identification. Two bits are assigned to the signal for system identification. In the case of the current terrestrial digital television broadcasting system, "00" is set. In the case of a terrestrial digital audio broadcasting system with a common transmission method, "01" is set. In addition, in the case of an advanced terrestrial digital television broadcasting system such as dual polarized terrestrial digital broadcasting, single polarized terrestrial digital broadcasting, or hierarchical division multiplexing terrestrial digital broadcasting according to the present embodiment, "10" is set. The advanced terrestrial digital television broadcasting system can simultaneously transmit 2K and 4K broadcast programs within the same service by broadcasting wave transmission using dual polarization transmission, single polarized terrestrial digital broadcasting, or hierarchical division multiplexing. is. A 2K broadcast program is a broadcast program with video of horizontal 1920 pixels×vertical 1080 pixels, and may include a video broadcast program with lower resolution. A 4K broadcast program is a broadcast program with video exceeding horizontal 1920 pixels×vertical 1080 pixels, and is not limited to a video broadcast program with horizontal 3840 pixels×vertical 2160 pixels.

The transmission parameter switching indicator in FIG. 5B is counted down when switching transmission parameters, and is used to notify the receiver of the switching timing. This index normally has a value of "1111", and is subtracted by 1 for each frame from 15 frames before switching when the transmission parameter is switched. The switching timing is the next frame synchronization when "0000" is sent. The index value returns to "1111" after "0000". Any one of the parameters such as the system identification of the TMCC information shown in FIG. When switching between the above, a countdown is performed. When switching only the activation control signal of the TMCC information, the countdown is not performed.

The activation control signal (emergency warning broadcast activation flag) of FIG. 0”.

The partial reception flag for each current information/next information in FIG. 5B is set to "1" when the segment in the center of the transmission band is set to partial reception, otherwise set to "0". If segment 0 is configured for partial reception, that layer is defined as A layer. If there is no next information, the partial reception flag is set to "1".

FIG. 5E shows an example of bit allocation for carrier modulation mapping schemes (data carrier modulation schemes) in each hierarchical transmission parameter for each current information/next information. If this parameter is "000", it indicates that the modulation scheme is DQPSK. A value of "001" indicates that the modulation scheme is QPSK. If it is "010", it indicates that the modulation scheme is 16QAM. If it is "011", it indicates that the modulation scheme is 64QAM. A value of "100" indicates that the modulation scheme is 256QAM. "101" indicates that the modulation scheme is 1024QAM. If it is "110", it indicates that the modulation scheme is 4096QAM. If there is no unused hierarchy or next information, "111" is set for this parameter.

The setting of the coding rate, the length of time interleaving, etc. may be the setting of each parameter according to the organization information of each layer for each current information/next information. The number of segments indicates the number of segments in each hierarchy with a 4-bit numerical value. If there is no unused hierarchy or next information, "1111" is set. Since settings such as mode and guard interval ratio are independently detected on the receiver side, it is not necessary to transmit TMCC information.

FIG. 5F shows an example of bit allocation for frequency conversion process identification. Frequency conversion processing identification is performed by the conversion unit 201T and the conversion unit 201L in FIG. If no frequency conversion processing or frequency conversion amplification processing is performed, it is set to “1”. This parameter for identifying frequency conversion processing is set to, for example, "1" when transmitted from a broadcasting station, and when the conversion section 201T or the conversion section 201L executes frequency conversion processing or frequency conversion amplification processing, the conversion section 201T or conversion unit 201L may be configured to rewrite to "0". In this way, when the second tuner/demodulator 130T or the third tuner/demodulator 130L of the broadcast receiving apparatus 100 receives the signal, if the frequency conversion process identification bit is "0", the OFDM It is possible to identify that the transmission wave has been subjected to frequency conversion processing or the like after being sent out from the broadcasting station.

In the dual-polarization terrestrial digital broadcasting according to the present embodiment, setting and rewriting of the frequency conversion processing identification bit may be performed for each of a plurality of polarizations. For example, if both of a plurality of polarized waves are not frequency-converted by the conversion unit 201T in FIG. 2A, the frequency conversion processing identification bits included in both OFDM transmission waves should be left as "1". If only one of a plurality of polarized waves is to be frequency-converted by the converter 201T, the frequency-conversion processing identification bit contained in the OFDM transmission wave of the frequency-converted polarized wave is set to "0" by the converter 201T. ] should be rewritten. Further, if both of a plurality of polarized waves are to be frequency-converted by the conversion unit 201T, the frequency conversion processing identification bits contained in the OFDM transmission waves of both polarized waves subjected to the frequency conversion are set to "0" by the conversion unit 201T. You should rewrite it. In this way, broadcast receiving apparatus 100 can identify whether or not frequency conversion is performed for each polarized wave among a plurality of polarized waves.

Since the frequency conversion processing identification bit is not defined in the current digital terrestrial broadcasting, it is ignored by digital terrestrial broadcasting receivers already used by users. However, the frequency conversion processing identification bit may be introduced into a new digital terrestrial broadcasting service that transmits video with a maximum resolution of 1920 horizontal pixels×1080 vertical pixels, which is an improved version of the current digital terrestrial broadcasting. In this case, the first tuner/demodulator 130C (FIG. 2A) of the broadcast receiving apparatus 100 according to the embodiment of the present invention may also be configured as a first tuner/demodulator corresponding to the new terrestrial digital broadcasting service. .

As a modified example, the frequency conversion processing identification bit can be set to It may be set to "0" in advance when transmitted from the broadcasting station. Note that this parameter may be configured to be set to "1" when the received broadcast waves are not for the advanced terrestrial digital broadcasting service.

FIG. 5G shows an example of bit allocation for physical channel number identification. The physical channel number identification consists of a 6-bit code and identifies the physical channel number (13 to 52ch) of the broadcast wave to be received. This parameter is set to "111111" when the received broadcast wave is not the advanced digital terrestrial broadcasting service. The physical channel number identification bit is not defined in the current terrestrial digital broadcasting, and in the current terrestrial digital broadcasting receiver, the physical channel number of the broadcast wave specified by the broadcasting station is obtained from the TMCC signal, AC signal, etc. couldn't. In the broadcast receiving apparatus 100 according to the embodiment of the present invention, by using the physical channel number identification bit of the received OFDM transmission wave, without demodulating the carrier other than the TMCC signal and the AC signal, the OFDM transmission wave is It is possible to grasp the physical channel number set by the broadcasting station. The 13ch to 52ch physical channels are assigned in advance to a frequency band of 470 to 710 MHz with a bandwidth of 6 MHz per channel. Therefore, the fact that the broadcast receiving apparatus 100 can grasp the physical channel number of the OFDM transmission wave based on the physical channel number identification bit means that the frequency band in which the OFDM transmission wave was transmitted in the air as a digital terrestrial broadcasting wave can be grasped. means you can.

In the dual-polarization terrestrial digital broadcasting according to the present embodiment, in the process of generating OFDM transmission waves on the broadcasting station side, each of a plurality of pairs of polarized waves in the bandwidth that originally constitutes one physical channel is assigned a corresponding physical channel number. Identification bits may be arranged and the same physical number should be given. Here, depending on the installation environment of the broadcast receiving apparatus 100, the conversion unit 201T in FIG. 2A may convert only the frequency of one of the plurality of polarized waves. As a result, when the respective frequencies of the plurality of polarized wave pairs when received by the broadcast receiving apparatus 100 differ from each other, it is possible to detect that the plurality of polarized waves having different frequencies were originally a pair. If it cannot be grasped in some way, it will be impossible to demodulate the advanced terrestrial digital broadcasting using both polarized waves of the dual-polarized terrestrial digital broadcasting on the broadcast receiving apparatus side. Even in such a case, if the above-described physical channel number identification bit is used, when transmission waves indicating the same value of the physical channel number identification bit exist in a plurality of different frequencies in the broadcast receiving apparatus 100, the broadcasting station originally It can be identified as a transmission wave that was transmitted as a pair of polarized waves forming one physical channel. This makes it possible to achieve advanced digital terrestrial broadcasting demodulation of dual-polarization digital terrestrial broadcasting by using a plurality of transmission waves indicating the same value.

FIG. 5H shows an example of bit allocation for primary signal identification. This example is an example in which the main signal identification bit is arranged in bit B117.

When the OFDM transmission wave to be transmitted is the transmission wave of dual-polarization terrestrial digital broadcasting, the TMCC information of the transmission wave transmitted by the main polarization sets the main signal identification parameter to "1" and the secondary polarization. It is set to "0" in the TMCC information of transmission waves transmitted by waves. In addition, the transmission wave transmitted by the main polarization means the same polarization direction as the polarization direction used for the transmission of the current terrestrial digital broadcasting service, of the vertical polarization signal and the horizontal polarization signal. Refers to polarized signals. In other words, in areas where the current terrestrial digital broadcasting service employs horizontal polarization transmission, in the dual-polarization terrestrial digital broadcasting service, the horizontal polarization is the main polarization and the vertical polarization is the secondary polarization. become a wave. In addition, in areas where the current terrestrial digital broadcasting service uses vertical polarization transmission, the vertical polarization is the main polarization and the horizontal polarization is the secondary polarization in the dual-polarization terrestrial digital broadcasting service. becomes.

In the broadcast receiving apparatus 100 that receives the transmission wave of dual-polarization terrestrial digital broadcasting according to the embodiment of the present invention, by using the main signal identification bit, the received transmission wave is transmitted with the main polarization at the time of transmission. It is possible to identify whether the signal was transmitted by the secondary polarized wave or by the secondary polarized wave. For example, if the identification processing of the main polarized wave and the secondary polarized wave is used, the transmission wave transmitted by the main polarized wave is first scanned during the initial scan described later, and the transmitted wave is transmitted by the main polarized wave. After the end of the initial scan of the transmission wave, it is possible to carry out processing such as performing the initial scan of the transmission wave transmitted by the secondary polarized wave.

The details of the hierarchy and segments of the dual-polarization terrestrial digital broadcasting according to the present embodiment and the configuration example of the digital broadcasting service to be transmitted will be described later. When transmitting digital broadcasting services and transmitting advanced terrestrial digital services on a hierarchy containing segments included in both the primary and secondary polarizations, an initial scan of the transmitted wave previously transmitted in the primary polarization. , complete the initial scan of the current terrestrial digital broadcasting service, and then perform the initial scan of the transmission wave transmitted by the secondary polarized wave to perform the initial scan of the advanced terrestrial digital broadcasting service. Also good. In this way, the initial scan of the advanced digital terrestrial broadcasting service can be performed after the initial scan of the current digital terrestrial broadcasting service is completed, and the setting by the initial scan of the current digital terrestrial broadcasting service can be performed by the advanced digital terrestrial broadcasting service. It is suitable because it can be reflected in the setting by the initial scan of the broadcasting service.

The definitions of the meanings of "1" and "0" of the main signal identification bits may be reversed to those described above.

Also, instead of the main signal identification bit, a polarization direction identification bit may be used as one parameter of the TMCC information. Specifically, the broadcasting station sets the polarization direction identification bit to "1" for transmission waves transmitted with horizontal polarization, and the polarization direction identification bit is set at the broadcasting station side for transmission waves transmitted with vertical polarization. It should be "0". In the broadcast receiving apparatus 100 that receives the transmission wave of dual-polarization terrestrial digital broadcasting according to the embodiment of the present invention, by using the polarization direction identification bit, it is possible to determine in which polarization direction the received transmission wave is transmitted. It is possible to identify whether it was transmitted by For example, if the identification processing of the polarization direction is used, in the initial scan described later, the transmission wave transmitted with the horizontal polarization is first scanned, and the transmission wave transmitted with the horizontal polarization is initially scanned. After the end of , it becomes possible to carry out processing such as performing an initial scan of the transmission wave transmitted with vertical polarization. For the explanation of the effect of this processing, the "main polarization" in the portion related to the initial scan in the above description of the main signal identification bit is read as "horizontal polarization", and the "secondary polarization" is read as "vertical polarization". Since it suffices to read it again, the explanation will be omitted.

The definitions of the meanings of "1" and "0" in the polarization direction identification bits may be reversed to those described above.

Also, instead of the above-described main signal identification bit, the first signal second signal identification bit may be used as one parameter of the TMCC information. Specifically, one of the horizontal polarized wave and the vertical polarized wave is defined as the first polarized wave, and the broadcast signal of the transmission wave transmitted with the first polarized wave is defined as the first signal. The station side should set the first signal second signal identification bit to "1". Also, the other polarized wave is defined as the second polarized wave, the broadcast signal of the transmission wave transmitted in the second polarized wave is defined as the second signal, and the broadcasting station side sets the first signal second signal identification bit. It should be "0". In the broadcast receiving apparatus 100 that receives the transmission wave of dual-polarization terrestrial digital broadcasting according to the embodiment of the present invention, by using the first signal/second signal identification bit, the received transmission wave can be any type during transmission. It is possible to identify whether the signal was transmitted in the polarization direction. Note that the first signal second signal identification bit replaces the concepts of "primary polarization" and "secondary polarization" with "first polarization" and "second polarization" from the definition of the above-described main signal identification bit. The processing and effects in the broadcast receiving apparatus 100 are obtained by changing the "main polarization" of the portion related to the processing of the broadcast receiving apparatus 100 in the above description of the main signal identification bit to the "first polarization." Since it suffices to read "secondary polarized wave" as "second polarized wave" and "secondary polarized wave", the explanation will be omitted.

The definitions of the meanings of "1" and "0" of the first signal second signal identification bit may be reversed to those described above.

It should be noted that the above-described main signal identification, polarization direction identification, and first signal/second signal identification are performed when the broadcast wave is a single-polarized terrestrial digital broadcasting service according to the present embodiment or when it is not an advanced terrestrial digital broadcasting service. This parameter can be set to "1".

Next, in the transmission wave of the hierarchical division multiplexing digital terrestrial broadcasting according to the present embodiment, upper and lower layer identification bits may be used as one parameter of the TMCC information instead of the above-described main signal identification bits. Specifically, the upper and lower layer identification bits are set to "1" in the TMCC information of the modulated waves transmitted in the upper layer, and the upper and lower layer identification bits are set in the TMCC information of the transmission waves transmitted in the lower layer. should be set to "0". Also, if the broadcast wave is not the advanced terrestrial digital broadcasting service, this parameter should be set to "1".

In the hierarchical division multiplexing digital terrestrial broadcasting according to the present embodiment, in the process of generating OFDM transmission waves on the broadcasting station side, among a plurality of modulated waves originally transmitted in the upper layer and lower layer of one physical channel, For the lower layer, depending on the installation environment of the broadcast receiving apparatus 100, frequency conversion and signal amplification may be performed by the converter 201L of FIG. 2A. Broadcast receiving apparatus 100, when receiving a transmission wave of hierarchical division multiplexing digital terrestrial broadcasting, determines whether the modulated wave was originally transmitted in the upper hierarchy or not, based on the upper and lower hierarchy identification bits described above. It is possible to identify whether it was a modulated wave transmitted by For example, the identification process allows the initial scanning of the advanced digital terrestrial broadcasting service transmitted in the lower hierarchy to be performed after the initial scanning of the current digital terrestrial broadcasting service transmitted in the upper hierarchy is completed. It is possible to reflect the setting by the initial scanning of the digital broadcasting service to the setting by the initial scanning of the advanced terrestrial digital broadcasting service. Also, in the third tuner/demodulator 130L of the broadcast receiving apparatus 100, it can be used to switch the processing of the demodulator 133S and the demodulator 133L based on the identification result.

In the explanation of the dual-polarization transmission system in each embodiment below, unless otherwise specified, an example in which horizontal polarization is the main polarization and vertical polarization is the secondary polarization will be explained. However, the relationship between main and sub may be reversed for horizontal polarization and vertical polarization.

FIG. 5I shows an example of bit allocation for 4K signaling layer identification.

When the broadcast wave to be transmitted is the transmission wave of the dual-polarization terrestrial digital broadcasting service according to the present embodiment, the bit of the 4K signal transmission layer identification is a horizontally polarized signal and a vertically polarized wave for each of the B layer and the C layer. It suffices to indicate whether or not to transmit a 4K broadcast program using both signals. One bit is assigned to each of the setting of the B layer and the setting of the C layer. For example, in the B layer and the C layer, if the 4K signal transmission layer identification bit for each layer is "0", the 4K broadcast program using both the horizontal polarization signal and the vertical polarization signal in that layer. It is sufficient to indicate that transmission is to be performed. In the B layer and the C layer, when the 4K signal transmission layer identification bit for each layer is "1", the 4K broadcast program that uses both the horizontal polarization signal and the vertical polarization signal is transmitted in that layer. It should be shown that it is not. In this way, in the broadcast receiving apparatus 100, using the 4K signal transmission layer identification bit, in the B layer and the C layer, both the horizontal polarization signal and the vertical polarization signal are used in each layer to perform 4K transmission. It is possible to identify whether or not to transmit the broadcast program.

Also, when the broadcast wave to be transmitted is the transmission wave of the single-polarized terrestrial digital broadcasting service according to the present embodiment, the bit of the 4K signal transmission layer identification indicates transmission of the 4K broadcast program for each of the B layer and the C layer. It is sufficient to indicate whether or not to carry out. One bit is assigned to each of the setting of the B layer and the setting of the C layer. For example, in the B layer and the C layer, if the 4K signal transmission layer identification bit for each layer is "0", it may indicate that the 4K broadcast program is to be transmitted in that layer. In the B layer and the C layer, when the 4K signal transmission layer identification bit for each layer is "1", it is sufficient to indicate that the 4K broadcast program is not transmitted in that layer. In this way, in the broadcast receiving apparatus 100, using the 4K signal transmission layer identification bit, in the B layer and the C layer, it is possible to identify whether the 4K broadcast program is to be transmitted in each layer. .

Further, when the broadcast wave to be transmitted is the broadcast wave of the hierarchical division multiplexing terrestrial digital broadcasting service of the present embodiment, the 4K signal transmission layer identification bit indicates whether or not the 4K broadcast program is transmitted in the lower layer. should be used to indicate When B119 of this parameter is "0", 4K broadcast programs are transmitted in the lower layer. When B119 of this parameter is "1", 4K broadcast programs are not transmitted in the lower layer. In this way, in the broadcast receiving apparatus 100, it is possible to identify whether or not the 4K broadcast program is to be transmitted in the lower layer using the 4K signal transmission layer identification bit. When the broadcast wave to be transmitted is the broadcast wave of the hierarchical division multiplexing terrestrial digital broadcasting service of this embodiment, B118 of this parameter may be undefined.

Note that when this parameter is "0", it is possible to employ an NUC (Non-Uniform Constellation) modulation scheme as well as the basic modulation scheme shown in FIG. 5E as the carrier modulation mapping scheme. In this case, it is possible to transmit the current/next information of the transmission parameter additional information on layer B/layer C using AC1 or the like.

Also, if the broadcast wave to be transmitted is not for advanced terrestrial digital broadcasting service, each of these parameters may be set to "1".

It should be noted that the definition of bits "0" and "1" of the 4K signal transmission layer identification described above may be reversed from the above description.

FIG. 5J shows an example of bit allocation for additional layer transmission identification. The bit of the additional layer transmission identification is virtual for each of the B layer and C layer of the transmission wave transmitted by the dual polarized terrestrial digital broadcasting service of this embodiment and transmitted by the secondary polarized wave. It suffices to indicate whether or not it is used as the D layer or the virtual E layer.

For example, in the illustrated example, the bit arranged in B120 is the D-layer transmission identification bit, and if this parameter is "0", it means that the B-layer transmitted by the secondary polarization is used as the virtual D-layer. means. To be more precise, among the segments transmitted with the secondary polarization, the segment group having the same segment number as the segment belonging to the B hierarchy transmitted with the primary polarization is transmitted with the primary polarization. This means that the layer is treated as a layer D, which is different from the layer B. When this parameter is "1", it means that the B layer transmitted by the secondary polarization is not used as the virtual D layer, but is used as the B layer.

Also, for example, the bit arranged in B121 is an E-layer transmission identification bit, and if this parameter is "0", it means that the C-layer transmitted in the secondary polarization is used as the virtual E-layer. To be more precise, among the segments transmitted with the secondary polarization, the segment group having the same segment number as the segment belonging to the C hierarchy transmitted with the primary polarization is transmitted with the primary polarization. In other words, it is treated as an E hierarchy, which is a hierarchy different from the C hierarchy. If this parameter is "1", it means that the C layer transmitted by the secondary polarization is not used as the virtual E layer, but is used as the C layer.

In this way, in broadcast receiving apparatus 100, using the additional layer transmission identification bit (D layer transmission identification bit and/or E layer transmission identification bit), D layer and E layer transmitted with sub-polarization It is possible to identify the presence or absence of That is, in the terrestrial digital broadcasting according to the present embodiment, by using the additional layer transmission identification parameter shown in FIG. A number of new tiers (D and E tiers in the example of FIG. 5J) can be operated.

If this parameter is "0", parameters such as the carrier modulation mapping method, coding rate, and time interleaving length shown in FIG. It is possible to make them different. In this case, the current/next information of parameters such as the carrier modulation mapping scheme, convolutional coding rate, and time interleaving length for the virtual D layer/virtual E layer is transmitted using the AC information (for example, AC1) described above. For example, on the broadcast receiving apparatus 100 side, parameters such as the carrier modulation mapping method, the convolutional coding rate, the length of time interleaving, etc. regarding the virtual D layer/virtual E layer can be grasped.

As a modification, when the additional layer transmission identification bit (the D layer transmission identification bit and/or the E layer transmission identification bit) is "0", the current information/next information of the TMCC information transmitted by the secondary polarization It may be configured to switch the meaning of transmission parameters of the B-layer and/or C-layer of information to the meaning of the virtual D-layer and/or virtual E-layer transmission parameters. In this case, when the virtual D layer and/or the virtual E layer is used, the primary polarization uses the A layer, the B layer, and the C layer, and the transmission parameters of these layers are the TMCC transmitted in the primary polarization. Information may be transmitted as current information/next information. Also, sub-polarized waves use layers A, D, and E, and the transmission parameters of these layers may be transmitted as current information/next information of TMCC information transmitted by sub-polarized waves. Even in this case, broadcast receiving apparatus 100 can grasp parameters such as the carrier modulation mapping method, convolutional coding rate, and length of time interleaving for the virtual D layer/virtual E layer.

Also, if the broadcast wave to be transmitted is not an advanced terrestrial digital broadcasting service, or even if it is an advanced terrestrial digital broadcasting service, if it is a single polarized wave transmission method or a hierarchical division multiplexing transmission method, this parameter is set to "1" respectively. It may be configured to

In addition, the parameter for the additional layer transmission identification may be stored in both the TMCC information of the main polarization and the TMCC information of the secondary polarization, but at least if it is stored in the TMCC information of the secondary polarization, the above-mentioned can be realized.

Also, the definition of bits "0" and "1" of the additional layer transmission identification explained above may be reversed from the above explanation.

It should be noted that when the above-mentioned 4K signal transmission layer identification parameter indicates that a 4K broadcast program is to be transmitted on the B layer, the D layer transmission identification bit indicates that the B layer is used as a virtual D layer. However, the broadcast receiving apparatus 100 may ignore the D layer transmission identification bit. Similarly, if the 4K signal transmission layer identification parameter indicates that a 4K broadcast program is to be transmitted on the C layer, even if the E layer transmission identification bit indicates that the C layer is used as the virtual E layer, The broadcast receiving apparatus 100 may be configured to ignore the E layer transmission identification bit. If the order of priority of bits used for determination processing is clarified in this way, it is possible to prevent conflicts in determination processing in broadcast receiving apparatus 100 .

In the broadcast wave to be transmitted, the above-mentioned frequency conversion process identification bit, physical channel number identification bit, main signal identification bit, 4K signal transmission identification bit, additional layer transmission identification bit, etc. are the above-mentioned system identification parameter is not "10", all bits should be set to "1" in principle. Although the system identification parameter is not "10", exceptionally for some reason, the frequency conversion process identification bit, the physical channel number identification bit, the main signal identification bit, the 4K signal transmission identification bit, and the additional layer transmission identification bit Even if the bit is not "1", the broadcast receiving apparatus 100 may be configured to ignore the bit that is not "1" and determine that all these bits are "1". .

FIG. 5K shows an example of the bit allocation for the “coding rate” bits, ie the code rate identification for error correction, shown in FIG. 5C.

Here, in the current digital terrestrial broadcasting system of 2K broadcasting, an identification bit that transmits a coding rate dedicated to "convolutional code" is transmitted. However, in the digital broadcasting according to the present embodiment, the advanced terrestrial digital broadcasting service of 4K broadcasting can be mixed with the digital terrestrial broadcasting service of 2K broadcasting. As already explained, in the advanced terrestrial digital broadcasting service of the 4K broadcasting, the LDPC code can be used as the inner code.

Therefore, unlike the current digital terrestrial broadcasting system of 2K broadcasting, the coding rate identification bit for error correction according to the present embodiment shown in FIG. It is also configured to accommodate

Here, regardless of whether the inner code of the target terrestrial digital broadcasting service is a convolutional code or an LDPC code, the bits arranged in the common range are used as the identification bits for coding rate transmission, Saving of the number of bits can be realized. Furthermore, even with the same identification bit, the coding rate can be set independently for the case where the inner code of the target terrestrial digital broadcasting service is a convolutional code and the case where it is an LDPC code. , as a digital broadcasting system, it is possible to adopt a group of coding rate options suitable for each coding method.

Specifically, in the example of FIG. 5K, when the identification bit is "000", the coding rate is 1/2 if the inner code is the convolutional code, and the coding rate is 2 if the inner code is the LDPC code. /3. When the identification bit is "001", it indicates that the coding rate is 2/3 if the inner code is a convolutional code, and that the coding rate is 3/4 if the inner code is an LDPC code. When the identification bit is "010", it indicates that the coding rate is 3/4 if the inner code is the convolutional code, and that the coding rate is 5/6 if the inner code is the LDPC code. When the identification bit is "011", it indicates that the coding rate is 5/6 if the inner code is the convolutional code, and that the coding rate is 2/16 if the inner code is the LDPC code. When the identification bit is "100", it indicates that the coding rate is 7/8 if the inner code is the convolutional code, and that the coding rate is 6/16 if the inner code is the LDPC code. If the identification bit is "101", it indicates that the inner code is undefined if the inner code is a convolutional code, and that the coding rate is 10/16 if the inner code is the LDPC code. If the identification bit is "110", it indicates that the inner code is undefined if the inner code is a convolutional code, and that the coding rate is 14/16 if the inner code is the LDPC code. If there is no unused hierarchy or next information, "111" is set for this parameter. Note that the coding rate of 2/3 may be substituted for the coding rate of 81/120. A coding rate of 3/4 may be substituted for a coding rate of 89/120. A coding rate of 5/6 may replace a coding rate of 101/120. Alternatively, a coding rate of 8/16, a coding rate of 12/16, or the like may be assigned.

The identification of whether the inner code of the target terrestrial digital broadcasting service is the convolutional code or the LDPC code is based on whether the relevant terrestrial digital broadcasting service is the current terrestrial digital broadcasting service or the advanced terrestrial digital broadcasting service. Identification using the result of identifying whether or not is also possible. The identification may be performed using the identification bit described with reference to FIG. 5D or FIG. 5I. Here, if the target terrestrial digital broadcasting service is the current terrestrial digital broadcasting service, it is sufficient to identify that the inner code is the convolutional code. Further, when the target terrestrial digital broadcasting service is an advanced terrestrial digital broadcasting service, it is sufficient to identify that the inner code is the LDPC code.

Further, as another example of identifying whether the inner code of the target terrestrial digital broadcasting service is a convolutional code or an LDPC code, identification based on the identification bit of the error correction method, which will be described later in FIG. Also good.

According to the error correction coding rate identification bit shown in FIG. 5K described above, it is possible to prevent an increase in the number of identification bits while supporting a plurality of inner code systems, which is preferable.

Further, in the advanced terrestrial digital broadcasting service of the dual-polarization transmission system, the TMCC information of the transmission wave transmitted with horizontal polarization and the TMCC information of the transmission wave transmitted with vertical polarization may be the same. and may be different. Similarly, in the advanced terrestrial digital broadcasting service of the hierarchical division multiplexing transmission system, the TMCC information of the transmission waves transmitted in the upper hierarchy and the TMCC information of the transmission waves transmitted in the lower hierarchy may be the same. and may be different. In addition, parameters such as the frequency conversion process identification, main signal identification, additional layer transmission identification, etc. mentioned above are described only in the TMCC information of the transmission wave transmitted in the secondary polarization and the transmission wave transmitted in the lower layer. Also good.

In the above description, parameters such as frequency conversion process identification, main signal identification, polarization direction identification, first signal second signal identification, upper/lower hierarchy identification, 4K signal transmission hierarchy identification, additional hierarchy transmission identification, etc. are used in the TMCC signal ( An example of being included in a TMCC carrier) and transmitted has been described. However, these parameters may be included in an AC signal (AC carrier) and transmitted. That is, these parameters may be transmitted by a signal of a carrier (TMCC carrier, AC carrier, etc.) modulated by a modulation scheme that performs mapping with a smaller number of states than the data carrier modulation scheme.

[AC signal]
The AC signal described above is an additional information signal relating to broadcasting, and is additional information relating to transmission control of modulated waves, seismic motion warning information, or the like. The seismic motion warning information is transmitted using the segment 0 AC carrier. On the other hand, additional information related to transmission control of modulated waves can be transmitted using any AC carrier. FIG. 6A shows an example of bit allocation for AC signals. The AC signal consists of 204 bits (B0-B203). B0 is the demodulation reference signal for AC symbols and has a predetermined amplitude and phase reference. B1 to B3 are signals for identifying the configuration of the AC signal. B4 to B203 are used for transmission of additional information related to transmission control of modulated waves or for transmission of seismic motion warning information.

FIG. 6B shows an example of bit allocation for identification of the structure of the AC signal. When transmitting seismic motion warning information using AC signals B4 to B203, this parameter is set to '001' or '110'. The configuration identification parameter (“001” or “110”) when transmitting seismic motion warning information has the same code as the leading 3 bits (B1 to B3) of the synchronization signal of the TMCC signal, and is transmitted at the same timing as the TMCC signal. It is sent alternately every frame. Also, if this parameter has a value other than the above, it indicates that additional information relating to transmission control of the modulated wave is transmitted using B4 to B203 of the AC signal. In this case, as parameters for identifying the structure of the AC signal, '000' and '111', or '010' and '101', or '011' and '100' are alternately transmitted every frame.

B4 to B203 of the AC signal are used for transmission of additional information related to transmission control of modulated waves or transmission of seismic motion warning information.

Transmission of additional information related to transmission control of modulated waves may be performed using various bit configurations. For example, parameters such as frequency conversion process identification, physical channel number identification, main signal identification, 4K signal transmission layer identification, additional layer transmission identification, etc. described in the description of the TMCC signal are used instead of or in addition to the TMCC signal. , bits may be assigned to additional information relating to transmission control of the modulated wave of the AC signal. In this way, in the broadcast receiving apparatus 100, using these parameters, various identification processes already explained in the explanation of the TMCC signal can be performed. In addition, transmission parameter additional information on the transmission layer of the 4K broadcast program when any parameter of the 4K signal transmission layer identification is "0", and virtual D when any parameter of the additional layer transmission identification is "0" Current/next information of the transmission parameters for the hierarchy/virtual E-tier may be assigned. In this way, the broadcast receiving apparatus 100 can acquire transmission parameters for each layer using these parameters, and can control demodulation processing for each layer.

The transmission of seismic motion warning information may be performed according to the bit allocation shown in FIG. 6C. The seismic motion warning information consists of a synchronization signal, start/end flag, update flag, signal identification, seismic motion warning detailed information, CRC, parity bit, and the like. The sync signal is composed of a 13-bit code, which is the same code as the 13 bits (B4 to B16) of the sync signal of the TMCC signal except for the first three bits. When the configuration identification of the AC signal indicates that seismic motion warning information is to be transmitted, the 16-bit code combining the configuration identification and the synchronization signal becomes the same 16-bit synchronization word as the TMCC synchronization signal. The start/end flag is composed of a 2-bit code as a flag for the start timing/end timing of the seismic motion warning information. The start/end flag is changed from "11" to "00" at the start of transmission of seismic motion warning information, and is changed from "00" to "11" at the end of transmission of seismic motion warning information. The update flag consists of a 2-bit code, and each time a change occurs in the contents of a series of seismic motion warning detailed information transmitted when the start/end flag is "00", "00" is set as the initial value to "1". ] is incremented. After "11", it returns to "00". When the start/end flag is "11", the update flag is also "11".

An example of signal identification bit allocation is shown in FIG. 6D. The signal identification consists of a 3-bit code and is used to identify the type of seismic motion warning detailed information. If this parameter is "000", it means "earthquake motion warning detailed information (with corresponding area)". If this parameter is "001", it means "earthquake motion warning detailed information (no corresponding area)". If this parameter is '010', it means 'a test signal of detailed earthquake motion warning information (with corresponding area)'. If this parameter is '011', it means 'test signal of detailed earthquake motion warning information (no corresponding area)'. If this parameter is "111", it means "no detailed seismic motion warning information". When the start/end flag is "00", the signal identification is "000" or "001" or "010" or "011". When the start/end flag is "11", the signal identification is "111".

The seismic motion warning detailed information is composed of 88-bit code. When the signal identification is ``000'', ``001'', ``010'', or ``011'', the seismic motion warning detailed information includes information about the current time when the seismic motion warning information is sent, information indicating the area subject to the seismic motion warning, and Transmit information such as the latitude/longitude/seismic intensity of the epicenter of the earthquake to be alerted. FIG. 6E shows an example of bit allocation of seismic motion warning detailed information when the signal identification is "000", "001", "010", or "011". Also, when the signal identification is "111", it is possible to transmit a code or the like for identifying the broadcaster using the bits of the seismic motion warning detailed information. FIG. 6F shows an example of bit allocation of seismic motion warning detailed information when the signal identification is "111".

CRC is a code generated using a predetermined generator polynomial for B21 to B111 of the seismic motion warning information. A parity bit is a code generated by a shortened code (187, 105) of the difference set cyclic code (273, 191) for B17 to B121 of the seismic motion warning information.

Broadcast receiving apparatus 100 can perform various types of control for coping with emergencies using parameters related to seismic motion warnings described with reference to FIGS. 6C, 6D, 6E, and 6F. For example, it is possible to control the presentation of information related to seismic motion warnings, control to switch low-priority display content to displays related to seismic motion warnings, and control to end the display of applications and switch to displays related to seismic motion warnings or broadcast program images. be.

FIG. 6G shows an example of bit allocation of additional information regarding transmission control of modulated waves. Additional information relating to transmission control of modulated waves is composed of synchronization signals, current information, next information, parity bits, and the like. The sync signal is composed of a 13-bit code, which is the same code as the 13 bits (B4 to B16) of the sync signal of the TMCC signal except for the first three bits. The sync signal may not have the same code as the 13 bits (B4 to B16) of the sync signal of the TMCC signal except for the first three bits. When the configuration identification of the AC signal indicates that additional information regarding the transmission control of the modulated wave is transmitted, the 16-bit code combining the configuration identification and the synchronization signal is a 16-bit synchronization word conforming to the TMCC synchronization signal. becomes. This code may be a 16-bit sync word that is different from the TMCC sync signal. The current information indicates current information of transmission parameter additional information when transmitting a 4K broadcast program on the B layer or C layer, or transmission parameters related to the virtual D layer or the virtual E layer. The next information indicates transmission parameter additional information when transmitting a 4K broadcast program on the B layer or the C layer, and information after switching transmission parameters regarding the virtual D layer or the virtual E layer.

In the example of FIG. 6G, current information B18 to B30 are the current information of the B layer transmission parameter additional information, and indicate the current information of the transmission parameter additional information when transmitting the 4K broadcast program in the B layer. Further, current information B31 to B43 is the current information of the C layer transmission parameter additional information, and indicates the current information of the transmission parameter additional information when transmitting the 4K broadcast program on the C layer. In addition, B70 to B82 of the next information are information after switching the transmission parameters of the B layer transmission parameter additional information, and after switching the transmission parameters of the transmission parameter additional information when transmitting the 4K broadcast program in the B layer. Indicates information. Further, B83 to B95 of the next information are information after switching the transmission parameters of the C layer transmission parameter additional information, and information after switching the transmission parameters of the transmission parameter additional information when transmitting the 4K broadcast program in the C layer. indicate. Here, the transmission parameter additional information is transmission parameters related to modulation that are added to the transmission parameters of the TMCC information shown in FIG. 5C to extend the specifications. Specific contents of the transmission parameter additional information will be described later.

In the example of FIG. 6G, current information B44 to B56 is the current information of the transmission parameters for the virtual D layer when operating the virtual D layer. B57 to B69 of the current information are current information of transmission parameters for the virtual E layer when operating the virtual E layer. Further, B96 to B108 of the next information are information after switching the transmission parameters for the virtual D layer when the virtual D layer is operated. B109 to B121 of the current information are information after switching the transmission parameters for the virtual E layer when operating the virtual E layer. The parameters stored in the transmission parameters for the virtual D layer and 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 current terrestrial digital broadcasting. Since the TMCC information in FIG. 5B must maintain compatibility with current terrestrial digital broadcasting, it is not easy to increase the number of bits. Therefore, in this embodiment, the transmission parameters for the virtual D layer and the virtual E layer are stored in the AC information as shown in FIG. 6G instead of the TMCC information.

This makes it possible to transmit information on modulation for the new virtual D layer and virtual E layer to the receiving device while maintaining the compatibility of the TMCC information with the current terrestrial digital broadcasting. As a result, when using the broadcast waves of the dual-polarization terrestrial digital broadcasting service according to the present embodiment, the B layer/C layer of the transmission wave transmitted in the secondary polarized wave as the virtual D layer/virtual E layer In addition, it is possible to set the transmission parameters of the virtual D layer/virtual E layer of the transmission wave transmitted with the secondary polarization to be different from the transmission parameters of the B layer/C layer of the transmission wave transmitted with the primary polarization. It becomes possible.

In addition, when the virtual D layer or the virtual E layer is not used, there is no problem in ignoring the transmission parameter information for the unused layer in the broadcast receiving apparatus 100 . For example, for the virtual D layer or the virtual E layer, if the parameter of the additional layer transmission identification of the TMCC information in FIG. 100 may be configured to ignore any values in the transmission parameters shown in FIG. 6G for the unused virtual D-tier or virtual E-tier.

Next, the details of the transmission parameter additional information explained in FIG. 6G will be explained. FIG. 6H shows a specific example of transmission parameter additional information. The transmission parameter additional information can include error correction method parameters, constellation format parameters, and the like.

The error correction method is the setting of what kind of encoding method to use as the error correction method for the inner code and outer code when transmitting 4K broadcast programs (advanced terrestrial digital broadcasting services) on the B layer or C layer. indicate. FIG. 6I shows an example of bit allocation for an error correction scheme. If this parameter is '000', it means that a convolutional code is used as an inner code and a shortened RS code is used as an outer code when transmitting a 4K broadcast program in the B layer or C layer. If this parameter is '001', it means that the LDPC code is used as the inner code and the BCH code is used as the outer code when transmitting a 4K broadcast program in the B layer or C layer. Furthermore, other combinations may be set so that they can be selected.

In addition, when transmitting a 4K broadcast program in the B layer or the C layer, it is possible to adopt not only a uniform constellation but also a non-uniform constellation (NUC) as a carrier modulation mapping method. FIG. 6J shows an example of bit allocation in constellation format. If this parameter is '000', it means that the carrier modulation mapping method selected by the transmission parameter of TMCC information is applied with a uniform constellation. If this parameter is one of '001' to '111', it means that the carrier modulation mapping method selected by the transmission parameter of the TMCC information is applied with a non-uniform constellation. When a non-uniform constellation is applied, the optimal value of the non-uniform constellation differs depending on the type of error correction method, its coding 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 uses the non-uniform constellation used in the demodulation process as the parameter of the carrier modulation mapping method. , and the parameter of the error correction method and the parameter of the coding rate. The determination may be made by referring to a predetermined table stored in the broadcast receiving apparatus 100 in advance.

[Transmission method 1 for advanced terrestrial digital broadcasting service]
In order to realize 4K (horizontal 3840 pixels × vertical 2160 pixels) broadcasting while maintaining the viewing environment of the current terrestrial digital broadcasting service, as an example of the transmission method of the advanced terrestrial digital broadcasting service according to the embodiment of the present invention, polarization A dual-use transmission system will be described. The dual-polarization transmission system according to the embodiment of the present invention is a system that has some specifications in common with the current terrestrial digital broadcasting system. For example, 13 segments within the approximately 6 MHz band corresponding to one physical channel are divided, 7 segments for transmission of 2K (horizontal 1920 pixels × vertical 1080 pixels) broadcast programs, and 5 segments for transmission of 4K broadcast programs. , one segment is allocated for mobile reception (so-called one-segment broadcasting). Furthermore, for the 5 segments for 4K broadcasting, not only horizontal polarization signals but also vertical polarization signals are used, and transmission capacity for a total of 10 segments is secured by MIMO (Multiple-Input Multiple-Output) technology. In addition, 2K broadcast programs will maintain image quality by optimizing the latest MPEG-2 Video compression technology, etc., and can be received even with current TV receivers, and 4K broadcast programs will be more efficient than MPEG-2 Video. Image quality is ensured by optimizing the HEVC compression technology, modulation multi-value, and the like. Note that the number of allocated segments for each broadcast may differ from that described above.

FIG. 7A shows an example of a dual-polarization transmission scheme in an advanced terrestrial digital broadcasting service according to an embodiment of the present invention. A frequency band of 470 to 710 MHz is used for transmission of broadcast waves for terrestrial digital broadcasting services. The number of physical channels in the frequency band is 40 channels from 13 to 52 ch, and each physical channel has a bandwidth of 6 MHz. A dual-polarization transmission scheme according to an embodiment of the present invention uses both horizontally polarized signals and vertically polarized signals within one physical channel.

FIG. 7A shows two examples (1) and (2) of allocation examples of 13 segments. In example (1), 2K broadcast programs are transmitted using segments 1 to 7 (B layer) of the horizontally polarized signal. A 4K broadcast program is transmitted using a total of 10 segments, segments 8 to 12 (C layer) of the horizontal polarization signal and segments 8 to 12 (C layer) of the vertical polarization signal. Segments 1 to 7 (B layer) of the vertically polarized signal may be used to transmit the same broadcast program as the 2K broadcast program transmitted by segments 1 to 7 (B layer) of the horizontally polarized signal. Alternatively, segments 1 to 7 (B layer) of the vertically polarized signal may be used to transmit a broadcast program different from the 2K broadcast program transmitted by the segments 1 to 7 (B layer) of the horizontally polarized signal. Alternatively, segments 1 to 7 (B layer) of the vertically polarized signal may be used for other data transmission or may be unused. The identification information on how to use the segments 1 to 7 (B layer) of the vertical polarization signal is determined by the parameters of the 4K signal transmission layer identification of the TMCC signal already described, the parameters of the additional layer transmission identification, etc., on the receiving device side. can be transmitted to Broadcast receiving apparatus 100 can identify how to treat segments 1 to 7 (B layer) of the vertically polarized signal based on these parameters. In addition, a 2K broadcast program transmitted using the B layer of a horizontally polarized signal and a 4K broadcast program transmitted using the C layer of both horizontal and vertical polarized signals are broadcast programs with the same content with different resolutions. It may be simultaneous broadcasting in which transmission is performed by a broadcasting system including broadcasting), or broadcasting programs with different contents may be transmitted. Segment 0 of both horizontal/vertical polarization signals carries the same one-segment broadcast program.

The example of (2) in FIG. 7A is a modification different from (1). In the example (2), a 4K broadcast program is transmitted using a total of 10 segments, segments 1 to 5 (B layer) of the horizontally polarized signal and segments 1 to 5 (B layer) of the vertically polarized signal. 2K broadcast programs are transmitted using segments 6 to 12 (layer C) of the horizontally polarized signal. In example (2), segments 6 to 12 (C layer) of the vertically polarized signal are used to transmit the same broadcast program as the 2K broadcast program transmitted by segments 6 to 12 (C layer) of the horizontally polarized signal. It's okay to be Segments 6-12 (layer C) of the vertically polarized signal may be used to transmit a broadcast program different from the 2K broadcast program transmitted in segments 6-12 (layer C) of the horizontally polarized signal. Also, segments 6 to 12 (layer C) of the vertically polarized signal may be used for other data transmission or may be unused. These pieces of identification information are also the same as in the example (1).

Note that the examples of (1) and (2) in FIG. 7A are both examples in which the horizontal polarization is the main polarization. I do not care.

FIG. 7B shows an example of the configuration of a broadcasting system for an advanced digital terrestrial broadcasting service using the dual polarization transmission system according to the embodiment of the present invention. This shows both a transmitting side system and a receiving side system of an advanced terrestrial digital broadcasting service using a dual-polarization transmission system. The configuration of the broadcasting system for the advanced terrestrial digital broadcasting service using the dual-polarization transmission system is basically the same as the configuration of the broadcasting system shown in FIG. It becomes a dual-polarized transmitting antenna capable of simultaneously transmitting a wave signal and a vertically polarized wave signal. In addition, in the example of FIG. 7B, only the channel selection/detection unit 131H and the channel selection/detection unit 131V (FIG. 2C) of the second tuner/demodulator 130T of FIG. 2A are extracted and described in the broadcast receiving apparatus 100. , and descriptions of other components are omitted.

A 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 dual-polarized receiving antenna, and is sent from the connector portion 100F1 to the channel selection/detection portion 131H via the coaxial cable 202T1. is entered in On the other hand, the vertically polarized wave signal transmitted from the radio tower 300T is received by the vertically polarized wave receiving element of the antenna 200T, and is input from the connector portion 100F2 to the tuning/detection portion 131V via the coaxial cable 202T2. An F-type connector is generally used for a connector portion that connects an antenna (coaxial cable) and a television receiver.

Here, the user may mistakenly connect the coaxial cable 202T1 to the connector section 100F2 and connect the coaxial cable 202T2 to the connector section 100F1. In this case, there is a possibility that the channel selection/detection section 131H and the channel selection/detection section 131V cannot identify whether the input broadcast signal is a horizontal polarization signal or a vertical polarization signal. In order to prevent this problem, one of the connectors for connecting the antenna (coaxial cable) and the television receiver, for example, the coaxial cable 202T2 for transmitting the vertically polarized signal and the connector of the connector 100F2, is connected to the horizontal polarized signal. and the connector portion of the connector portion 100F1 having a shape different from that of the F-type connector. Alternatively, the channel selection/detection unit 131H and the channel selection/detection unit 131V refer to the main signal identification of the TMCC information of each input signal to determine whether the input broadcast signal is a horizontal polarization signal or a vertical polarization signal. may be configured to identify and control to operate. Further, instead of using two coaxial cables, ie, coaxial cable 202T1 and coaxial cable 202T2, antenna 200T and broadcast receiving apparatus 100 may be connected by a single multi-core coaxial cable.

FIG. 7C shows an example of a configuration different from the above of the configuration of the broadcasting system for the advanced digital terrestrial broadcasting service using the dual-polarization transmission system according to the embodiment of the present invention. As shown in FIG. 7B, the broadcast receiving apparatus 100 has two broadcast signal input connector sections, and the configuration using two coaxial cables for connection between the antenna 200T and the broadcast receiving apparatus 100 is costly for equipment and It may not always be suitable for handling at the time of cable wiring. Therefore, in the configuration shown in FIG. 7C, a conversion unit ( converter) 201T, and the conversion unit 201T and the broadcast receiving apparatus 100 are connected by a single coaxial cable 202T3. A broadcast signal input from connector section 100F3 is demultiplexed and input to channel selection/detection section 131H and channel selection/detection section 131V. The connector section 100F3 may have a function of supplying operating power to the conversion section 201T.

The conversion unit 201T may belong to the equipment of the environment (for example, an apartment complex, etc.) in which the broadcast receiving device 100 is installed. Alternatively, conversion unit 201T may be configured as a device integrated with antenna 200T and installed in a house or the like. The conversion unit 201T performs frequency conversion 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. process. 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, It is possible to transmit to the broadcast receiving apparatus 100 at the same time through the coaxial cable 202T3. If necessary, both the horizontal polarization signal and the vertical polarization signal may be subjected to frequency conversion processing, but in this case also, the frequency bands of the two after frequency conversion must be different from each other. . Also, the broadcast receiving apparatus 100 may be provided with one broadcast signal input connector section 100F3.

FIG. 7D shows an example of frequency conversion processing. In this example, the vertical polarization signal is subjected to frequency conversion processing. Specifically, in this processing, among the horizontally polarized signal and the vertically polarized signal transmitted in the frequency band of 470 to 710 MHz (band corresponding to 13ch to 52ch of UHF), the frequency band of the vertically polarized signal is This is processing for converting the frequency band from 470 to 710 MHz to the frequency band from 770 to 1010 MHz. By this processing, signals transmitted using horizontal polarization and vertical polarization in the same frequency band can be simultaneously transmitted to the broadcast receiving apparatus 100 through one coaxial cable 202T3 without mutual interference. Become. Note that the horizontal polarization signal may be subjected to frequency conversion processing.

Moreover, it is preferable that the frequency conversion processing is performed on the signal transmitted by the sub-polarized wave according to the result of referring to the main signal identification of the TMCC information described above. As described with reference to FIG. 5H, the signal transmitted with the primary polarization is more likely to be transmitted including the current terrestrial digital broadcasting service than the signal transmitted with the secondary polarization. Therefore, in order to more preferably maintain compatibility with the current terrestrial digital broadcasting service, it is preferable to frequency-convert the signal transmitted by the secondary polarized wave without frequency-converting the signal transmitted by the primary polarized wave. is suitable.

When frequency-converting a signal transmitted with secondary polarization, the frequency band of the signal transmitted with secondary polarization is lower than the frequency band of the signal transmitted with primary polarization in the converted signal. should be high. As a result, in the initial scan of the broadcast receiving apparatus 100, if the scan is started from the low frequency side and proceeds to the high frequency side, the signal transmitted with the main polarization will precede the signal transmitted with the secondary polarization. An initial scan can be performed on As a result, it is possible to more preferably perform a process of reflecting the setting by the initial scan of the current digital terrestrial broadcasting service to the setting by the initial scanning of the advanced digital terrestrial broadcasting service.

In addition, frequency conversion processing may be performed for all physical channels used in advanced terrestrial digital broadcasting services, but may be performed only for physical channels using signal transmission using a dual-polarization transmission system. .

Note that the frequency band after conversion by the frequency conversion process is preferably between 710 and 1032 MHz. That is, when trying to receive the digital terrestrial broadcasting service and the BS/CS digital broadcasting service at the same time, the broadcasting signal of the digital terrestrial broadcasting service received by the antenna 200T and the broadcasting signal of the BS/CS digital broadcasting service received by the antenna 200B are combined. are mixed and transmitted to the broadcast receiving apparatus 100 through a single coaxial cable. In this case, since the BS/CS-IF signal uses a frequency band of about 1032 to 2150 MHz, if the frequency band after conversion by the frequency conversion process is set to be between 710 and 1032 MHz, the horizontal polarization signal It is possible to avoid interference between the broadcasting signal of the terrestrial digital broadcasting service and the broadcasting signal of the BS/CS digital broadcasting service while avoiding the interference between the terrestrial digital broadcasting service and the vertically polarized wave signal. In addition, when considering the reception of retransmitted broadcast signals by cable television (Community Antenna TV or Cable TV: CATV) stations, the frequency band of 770 MHz or less (band equivalent to 62ch or less of UHF) in television broadcasting distribution by cable television stations is used, it is more preferable to set the frequency band after conversion by the frequency conversion process to between 770 and 1032 MHz, which exceeds the band corresponding to 62ch of UHF.

In addition, the bandwidth of the area between the frequency band before conversion and the frequency band after conversion by frequency conversion processing (part a in FIG. 7D) is an integral multiple of the bandwidth of one physical channel (6 MHz). It is preferable to set In this way, in the broadcast receiving apparatus 100, frequency setting control can be easily performed when, for example, the broadcast signal in the frequency band before conversion by the frequency conversion processing and the broadcast signal in the frequency band after conversion are collectively subjected to frequency scanning. There are advantages such as

As described above, in the dual-polarization transmission system according to the embodiment of the present invention, both horizontal polarization signals and vertical polarization signals are used for transmission of 4K broadcast programs. Therefore, in order to correctly reproduce a 4K broadcast program, it is necessary for the receiving side to correctly grasp the combination of the physical channels of the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization. Even if frequency conversion processing is performed and the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization for the same physical channel are input to the receiving device as signals of different frequency bands, In the broadcast receiving apparatus 100 of the present embodiment, the parameters of the TMCC information (for example, main signal identification and physical channel number identification) shown in FIGS. Therefore, it is possible to correctly grasp the combination of the broadcast signal transmitted by the vertical polarization and the broadcast signal transmitted by the vertically polarized wave. As a result, the broadcast receiving apparatus 100 of this embodiment can appropriately receive, demodulate, and reproduce a 4K broadcast program.

Note that the examples in FIGS. 7B, 7C, and 7D are all examples in which the horizontal polarization is the main polarization, but depending on the operation, the horizontal polarization and the vertical polarization may be reversed. .

It should be noted that, as described above, the broadcast wave of digital terrestrial broadcasting transmitted by the dual-polarization transmission method described above can be received and reproduced by the second tuner/demodulator 130T of FIG. 2A of the broadcast receiving device 100. , and the first tuner/demodulator 130C. When the broadcast wave of the digital terrestrial broadcasting is received by the first tuner/demodulator 130C, among the broadcast signals of the digital terrestrial broadcasting, the broadcast signal transmitted in the advanced terrestrial digital broadcasting service layer is ignored. However, broadcast signals transmitted in the current terrestrial digital broadcasting service layer are reproduced.

<Pass-through transmission method for advanced terrestrial digital broadcasting service>
Broadcast receiving apparatus 100 can receive signals transmitted by the pass-through transmission method. The pass-through transmission system is a system in which a broadcast signal received by a cable television station or the like is transmitted to a CATV distribution system with the same frequency or frequency-converted in the same signal system.

The pass-through method consists of (1) a first method in which transmission signal band extraction and level adjustment are performed for each terrestrial digital broadcasting signal output from a terrestrial receiving antenna and transmitted to CATV facilities at the same frequency as the transmission signal frequency; The transmission signal band extraction and level adjustment of each terrestrial digital broadcasting signal output from the terrestrial reception antenna are performed, and the frequency of the VHF band, MID band, SHB band, and UHF band set by the CATV facility manager is transmitted to the CATV facility. There is a method of The equipment constituting the reception amplifier for performing the signal processing of the first method, or the equipment constituting the reception amplifier and the frequency converter for performing the signal processing of the second method is an OFDM signal processor (OFDM Signal Processor: OFDM-SP).

FIG. 7E shows an example of a system configuration when the first system of the pass-through transmission system is applied to the advanced terrestrial digital broadcasting service of the dual-polarization transmission system. FIG. 7E shows a headend facility 400C of a cable television station and a broadcast receiver 100. FIG. Further, FIG. 7F shows an example of frequency conversion processing at that time. The notation (H V) in FIG. 7F indicates the state of the broadcast signal in which both the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization exist in the same frequency band. ) indicates a broadcast signal transmitted with horizontal polarization, and the notation (V) indicates a broadcast signal transmitted with vertical polarization. The notations in FIGS. 7H and 7I below have the same meaning.

When the pass-through transmission of the first system is applied to the advanced terrestrial digital broadcasting service of the dual-polarization transmission system of the embodiment of the present invention, the cable television station The headend facility 400C extracts the signal band and adjusts the level, and transmits the signal at the same frequency as the transmission signal frequency. On the other hand, for the broadcast signal transmitted by vertical polarization, signal band extraction and level adjustment are performed in the headend equipment 400C of the cable television station, and the same frequency conversion processing as described in FIG. 7D is performed before transmission. . This frequency conversion process is a process of converting a broadcast signal transmitted with vertical polarization into a frequency band higher than the frequency band of 470-770 MHz, which corresponds to 13ch-62ch of UHF. With this processing, the frequency bands of broadcast signals transmitted with horizontal polarization and those transmitted with vertical polarization do not overlap, enabling signal transmission with a single coaxial cable (or optical fiber cable). becomes. The transmitted signal can be received by the broadcast receiver 100 of this embodiment. The process of receiving and demodulating the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization included in the signal in the broadcast receiving apparatus 100 of the present embodiment is the same as the description of FIG. 7D. .

FIG. 7G shows an example of a system configuration when the second pass-through transmission method is applied to the advanced terrestrial digital broadcasting service of the dual-polarization transmission method. FIG. 7G shows a headend facility 400C of a cable television station and a broadcast receiver 100. FIG. FIG. 7H shows an example of frequency conversion processing at that time.

When the pass-through transmission of the second system is applied to the advanced terrestrial digital broadcasting service of the dual-polarization transmission system of the embodiment of the present invention, the cable television station The head end equipment 400C extracts the signal band and adjusts the level, performs frequency conversion processing to the frequency set by the CATV facility manager, and then transmits the signal. On the other hand, for the broadcast signal transmitted by vertical polarization, signal band extraction and level adjustment are performed in the headend equipment 400C of the cable television station, and the same frequency conversion processing as described in FIG. 7D is performed before transmission. . The frequency conversion process shown in FIG. 7H differs from the frequency conversion process shown in FIG. 7F in that the broadcast signal transmitted with horizontal polarization is not limited to the frequency band of 470 to 770 MHz, which is the band of 13ch to 62ch of UHF, but is lower. This is a process of performing frequency conversion so as to extend the range to the frequency band and rearrange within the range of 90 to 770 MHz. With this processing, the frequency bands of broadcast signals transmitted with horizontal polarization and those transmitted with vertical polarization do not overlap, enabling signal transmission with a single coaxial cable (or optical fiber cable). becomes. The transmitted signal can be received by the broadcast receiving apparatus 100 of this embodiment. The process of receiving and demodulating the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization included in the signal in the broadcast receiving apparatus 100 of the present embodiment is the same as the description of FIG. 7D. .

Further, as another modification of the frequency conversion processing of the headend equipment 400C of the cable television station in FIG. 7G, the broadcast signal at the time of pass-through output after frequency conversion may be changed from the state shown in FIG. 7H to the state shown in FIG. 7I. In this case, signal band extraction and level adjustment are performed for both broadcast signals transmitted by horizontal polarization and broadcast signals transmitted by vertical polarization, and frequency conversion processing to the frequency set by the CATV facility manager. may be sent after performing In the example of FIG. 7I, both the broadcast signal transmitted with horizontal polarization and the broadcast signal transmitted with vertical polarization are frequency-rearranged in the range of 90 to 770 MHz (range from VHF1ch to UHF62ch). Since conversion is performed and the frequency band in the range beyond UHF62ch is not used, the frequency band utilization efficiency of the broadcast signal is higher than that in FIG. 7H.

In addition, since the band for rearranging the broadcast signal is wider than the frequency band of 470 to 710 MHz, which is the band of 13ch to 52ch of UHF at the time of antenna reception, as shown in the example of FIG. It is also possible to alternately rearrange the broadcast signals transmitted by vertical polarization and the broadcast signals transmitted by vertical polarization. In this case, as shown in the example of FIG. 7I, the pair of the broadcast signal transmitted by the horizontal polarization and the broadcast signal transmitted by the vertical polarization, which were on the same physical channel at the time of antenna reception, are converted to the physical channels at the time of antenna reception. If the channels are rearranged alternately in order, when the broadcast receiving apparatus 100 of the present embodiment performs an initial scan from the low frequency side, the broadcast signal originally transmitted in the same physical channel with horizontal polarization and the vertical polarization are transmitted. It is possible to proceed with the initial setting sequentially in units of the same physical channel for the pair of broadcast signals transmitted by waves, and to efficiently perform the initial scan.

Note that the examples of FIGS. 7E, 7F, 7G, 7H, and 7I are all examples in which the main polarization is horizontal polarization, but depending on the operation, horizontal polarization and vertical polarization may be used. It does not matter if it is reversed.

It should be noted that, as described above, the broadcast wave of the terrestrial digital broadcasting of the dual-polarization transmission system that uses the pass-through transmission system described above can also be received and reproduced by the second tuner/demodulator 130T of FIG. 2A of the broadcast receiver 100. It is possible, but it is also receivable by the first tuner/demodulator 130C. When the broadcast wave of the terrestrial digital broadcasting is received by the first tuner/demodulator 130C, among the broadcast signals of the terrestrial digital broadcasting broadcast wave, the broadcast signal transmitted in the layer of the advanced terrestrial digital broadcasting service is ignored. However, broadcast signals transmitted in the current terrestrial digital broadcasting service layer are reproduced.

[Transmission method 2 for advanced terrestrial digital broadcasting service]
In order to realize 4K broadcasting while maintaining the viewing environment of the current terrestrial digital broadcasting service, a single polarized wave transmission system is used as an example of a transmission system for the advanced terrestrial digital broadcasting service according to the embodiment of the present invention, which is different from the above. will be explained. The single polarized wave transmission system according to the embodiment of the present invention is a system that has some specifications in common with the current terrestrial digital broadcasting system, and uses either a horizontally polarized wave signal or a vertically polarized wave signal, This is a method of transmitting data by SISO (Single-Input Single-Output) technology. For example, 13 segments within the approximately 6 MHz band corresponding to one physical channel are divided, 8 segments for transmission of 2K broadcast programs, 4 segments for transmission of 4K broadcast programs, and 1 segment for mobile reception. , respectively. In addition, 2K broadcast programs maintain image quality by optimizing the latest MPEG-2 Video compression technology, etc., and can be received even with current TV receivers, and 4K broadcast programs are more efficient than MPEG-2 Video. HEVC compression technology, VVC compression technology, etc. are adopted, and image quality is ensured by adopting technologies such as modulation multi-value conversion and NUC. Note that the number of allocated segments for each broadcast may differ from that described above.

FIG. 7J shows an example of a single-polarized wave transmission system in the advanced terrestrial digital broadcasting service according to the embodiment of the present invention. A frequency band of 470 to 710 MHz is used for transmission of broadcast waves for digital terrestrial broadcasting services. The number of physical channels in the frequency band is 40 channels from 13 to 52 ch, and each physical channel has a bandwidth of 6 MHz. In the single polarization transmission method according to the embodiment of the present invention, transmission of 2K broadcasting service and transmission of 4K broadcasting service are simultaneously performed within one physical channel.

FIG. 7J shows two examples (1) and (2) of allocation examples of 13 segments. In example (1), segments 1 to 4 (layer B) are used to transmit a 4K broadcast program. Transmission of 2K broadcast programs is performed using segments 5 to 12 (layer C). The 4K broadcast program transmitted using the B layer and the 2K broadcast program transmitted using the C layer may be simultaneous broadcasting in which broadcast programs with the same content are transmitted with different resolutions (broadcasting methods including resolution). However, it may transmit broadcast programs with different contents. Example (2) is a modification different from (1). In example (2), segments 1 to 8 (B layer) are used to transmit 2K broadcast programs, and segments 9 to 12 (C layer) are used to transmit 4K broadcast programs.

FIG. 7K shows an example of a configuration of a broadcasting system for an advanced digital terrestrial broadcasting service using a single polarization transmission system according to an embodiment of the present invention. This shows both a transmitting side system and a receiving side system of an advanced terrestrial digital broadcasting service using a single polarized wave transmission system. The configuration of the broadcasting system for the advanced terrestrial digital broadcasting service using the single polarization transmission system is basically the same as the configuration of the broadcasting system shown in FIG. It becomes a single-polarized wave transmitting antenna capable of transmitting either a wave signal or a vertically polarized wave signal. In addition, in the example of FIG. 7K, only the channel selection/detection unit 131H (FIG. 2C) of the second tuner/demodulation unit 130T of FIG. is omitted.

A single-polarized wave signal transmitted from the radio tower 300S is received by the antenna 200S, which is a single-polarized wave receiving antenna, and is input to the tuning/detection unit 131H from the connector unit 100F3 via the coaxial cable 202S. An F-type connector is generally used for a connector portion that connects an antenna (coaxial cable) and a television receiver. In the configuration of the broadcasting system for the advanced terrestrial digital broadcasting service using the single polarized wave transmission system, the antenna 200S and the broadcast receiving device 100 can be connected with a single coaxial cable 202S, and frequency conversion processing (converting section) is performed. is also unnecessary, which is preferable.

In addition, as described above, the broadcast wave of digital terrestrial broadcasting transmitted by the single polarized wave transmission method described above can be received and reproduced by the second tuner/demodulator 130T of FIG. 2A of the broadcast receiving device 100. , and the first tuner/demodulator 130C. When the broadcast wave of the terrestrial digital broadcasting is received by the first tuner/demodulator 130C, among the broadcast signals of the terrestrial digital broadcasting broadcast wave, the broadcast signal transmitted in the layer of the advanced terrestrial digital broadcasting service is ignored. However, broadcast signals transmitted in the current terrestrial digital broadcasting service layer are reproduced.

[Transmission method 3 for advanced terrestrial digital broadcasting service]
In order to realize 4K broadcasting while maintaining the viewing environment of the current terrestrial digital broadcasting service, a hierarchical division multiplexing transmission system is used as an example of a transmission system for the advanced terrestrial digital broadcasting service according to the embodiment of the present invention, which is different from the above. will be explained. The hierarchical division multiplexing transmission system according to the embodiment of the present invention is a system having some specifications in common with the current terrestrial digital broadcasting system. In this method, for example, broadcast waves of a 4K broadcast service with a low signal level are multiplexed and transmitted on the same channel as the broadcast waves of the current 2K broadcast service. In this system, the reception level of 4K broadcasting is suppressed to below the required C/N for 2K broadcasting, and reception is performed as before. For 4K broadcasting, while expanding transmission capacity by modulation multi-value etc., using reception technology compatible with LDM (hierarchical division multiplexing) technology, 2K broadcasting waves are canceled and reception is possible with the remaining 4K broadcasting waves. conduct.

FIG. 8A shows an example of the hierarchical division multiplexing transmission system in the advanced terrestrial digital broadcasting service according to the embodiment of the present invention. In this method, the upper layer is composed of the current 2K broadcast modulated wave, the lower layer is composed of the 4K broadcast modulated wave, the upper layer and the lower layer are multiplexed, and the same frequency band is used as a composite wave. Output. For example, a configuration may be adopted in which 64QAM or the like is used as the modulation method in the upper hierarchy, and 256QAM or the like is used as the modulation method in the lower hierarchy. The 2K broadcast program transmitted using the upper layer and the 4K broadcast program transmitted using the lower layer are simultaneous broadcasts in which broadcast programs with the same content are transmitted with different resolutions (broadcasting methods including resolution). Alternatively, it may transmit broadcast programs with different contents. Here, the upper layer is transmitted with high power and the lower layer is transmitted with low power. The difference (power difference) between the modulated wave level of the upper layer and the modulated wave level of the lower layer is called an injection level (IL), which is a value set by the broadcasting station. The injection level is generally expressed by a logarithmic relative ratio (dB) of the difference in modulated wave level (difference in power).

FIG. 8B shows an example of the configuration of a broadcasting system for an advanced digital terrestrial broadcasting service using the hierarchical division multiplexing transmission system according to the embodiment of the present invention. The configuration of the broadcasting system for the advanced terrestrial digital broadcasting service using the hierarchical division multiplexing transmission system is basically the same as the configuration of the broadcasting system shown in FIG. It is a transmission antenna that transmits a broadcast signal in which 2K broadcast of the hierarchy and 4K broadcast of the lower hierarchy are multiplexed. In addition, in the example of FIG. 8B, only the channel selection/detection unit 131L (FIG. 2D) of the third tuner/demodulation unit 130L of FIG. 2A is extracted from the broadcast receiving apparatus 100. is omitted.

A broadcast signal received by antenna 200L is input from connector section 100F4 to tuning/detection section 131L via converter 201L and coaxial cable 202L. Here, in the above configuration, when a broadcast signal is transmitted from the antenna 200L to the broadcast receiving apparatus 100, as shown in FIG. Also good. That is, when the antenna 200L is installed on the roof of an apartment building or the like, and a broadcast signal is transmitted to the broadcast receiver 100 in each room via the coaxial cable 202L having a long cable length, the broadcast signal is attenuated. In 131L, there is a possibility that 4K broadcast waves in the lower hierarchy cannot be correctly received.

Therefore, in order to prevent this problem, the conversion unit 201L performs frequency conversion amplification processing on the 4K broadcast signal in the lower layer. This frequency conversion amplification process converts the frequency band of the 4K broadcast signal in the lower hierarchy from the frequency band of 470 to 710 MHz (band corresponding to UHF 13ch to 52ch) to, for example, 770 to 770 that exceeds the band corresponding to UHF 62ch. This is a process of converting to a frequency band of 1010 MHz. Furthermore, in this process, a process is performed to amplify the 4K broadcast signal of the lower hierarchy to a signal level to such an extent that the influence of attenuation in the cable does not pose a problem. Such processing makes it possible to avoid interference between the 2K broadcast signal and the 4K broadcast signal, and also to avoid the influence of attenuation of the broadcast signal during transmission through the coaxial cable. In addition, when the influence of attenuation does not become a problem, such as when the cable length of the coaxial cable 202L is short, the converter 201L and the frequency conversion amplification process may be omitted.

Further, as shown in FIG. 8D, the channel selection/detection unit provided in the third tuner/demodulation unit 130L of FIG. and a channel selection/detection unit 131L2 that performs processing such as channel selection/detection on the modulated wave of the lower layer (4K broadcast). By adopting such a configuration, the 2K broadcast signal and the 4K broadcast signal transmitted from the broadcasting station using the same physical channel are simultaneously selected for the signal subjected to the frequency conversion and amplification processing in the conversion unit 201L. Processing such as station/detection can be performed, and suitable processing can be performed particularly at the time of simultaneous broadcasting.

In addition, the frequency band after conversion by the frequency conversion amplification process is between 710 and 1032 MHz, which exceeds the band corresponding to 52ch of UHF, or between 770 and 1032MHz, which exceeds the band corresponding to 62ch of UHF (retransmission by cable TV stations, etc.). In the case of ), the bandwidth of the area between the frequency band before conversion and the frequency band after conversion by frequency conversion amplification processing is an integer multiple of the bandwidth (6 MHz) of one physical channel and that the frequency conversion amplification process may be performed only for physical channels that use signal transmission according to the hierarchical division multiplexing transmission system. This is the same as the description of this embodiment.

Note that the broadcast receiving apparatus 100 of the present embodiment determines whether the received broadcast signal is a broadcast signal transmitted in the lower hierarchy or a broadcast signal transmitted in the upper hierarchy according to the TMCC information described with reference to FIG. 5H. Identification is possible using upper and lower layer identification bits. Further, the broadcast receiving apparatus 100 of the present embodiment uses the frequency conversion processing identification bit of the TMCC information described with reference to FIG. can be identified by Further, the broadcast receiving apparatus 100 of the present embodiment uses the 4K signal transmission layer identification bit of the TMCC information described in FIG. It is possible to identify These identification processes can be performed by demodulating the data carrier and referring to the control information contained in the stream. Referencing the parameters of the TMCC information described above for identification makes the process easier and faster.

Note that the channel selection/detection unit 131L (FIG. 2D) of the third tuner/demodulation unit 130L of FIG. Since it has a corresponding reception function, the converter 201L shown in FIG. 8B is not necessarily required between the antenna 200L and the broadcast receiver 100.

In addition, as described above, the broadcast wave of the digital terrestrial broadcasting transmitted by the hierarchical division multiplexing transmission system described above can be received and reproduced by the third tuner/demodulator 130L of FIG. 2A of the broadcast receiver 100. , and the first tuner/demodulator 130C. When the broadcast wave of the digital terrestrial broadcasting is received by the first tuner/demodulator 130C, among the broadcast signals of the digital terrestrial broadcasting, the broadcast signal transmitted in the advanced terrestrial digital broadcasting service layer is ignored. However, broadcast signals transmitted in the current terrestrial digital broadcasting service layer are reproduced.

[MPEG-2 TS system]
The broadcasting system of this embodiment is compatible with MPEG-2 TS, which is used in current terrestrial digital broadcasting services, etc., as a media transport method for transmitting data such as video and audio. Specifically, the format of the stream transmitted by the OFDM transmission wave of (1) in FIG. 4D is MPEG-2 TS, and among the OFDM transmission waves of (2) and (3) in FIG. MPEG-2 TS is the format of the stream transmitted in the layer where the digital broadcasting service is transmitted. Also, the format of the stream obtained by demodulating the transmission wave in the first tuner/demodulator 130C of the broadcast receiving apparatus 100 of FIG. 2A is MPEG-2 TS. Among the streams obtained by demodulating the transmission waves in the second tuner/demodulator 130T, the format of the stream corresponding to the layer in which the current terrestrial digital broadcasting service is transmitted is MPEG-2 TS. Similarly, among the streams obtained by demodulating the transmission waves in the third tuner/demodulator 130L, the format of the stream corresponding to the layer in which the current terrestrial digital broadcasting service is transmitted is MPEG-2 TS.

MPEG-2 TS is characterized by multiplexing components such as video and audio constituting a program into one packet stream together with control signals and clocks. Since the clock is handled as one packet stream, it is suitable for transmitting one content over one transmission path with guaranteed transmission quality, and is used in many current digital broadcasting systems. In addition, it is possible to realize two-way communication via two-way networks such as fixed networks and mobile networks, and by linking functions using broadband networks with digital broadcasting services, additional content can be acquired via broadband networks. It is possible to correspond to a broadcast communication cooperation system that combines arithmetic processing in a server device, presentation processing by cooperation with a mobile terminal device, etc. with a digital broadcasting service.

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

[Control signal of broadcasting system using MPEG-2 TS system]
MPEG-2 TS system control information includes a table mainly used for program sequence information and a table used for other than program sequence information. Tables are transmitted in section format and descriptors are placed within the table.

<Tables used in service information>
FIG. 9B shows a list of tables used in the program sequence information of the MPEG-2 TS broadcasting system. In this embodiment, the following table 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) Tables set by business operators

<Table used in digital broadcasting>
FIG. 9C shows a list of tables used other than program sequence information in the MPEG-2 TS broadcasting system. In this embodiment, the following table is used as a table other than the program arrangement information.

(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) Tables set by business operators

<Descriptor used in service information>
9D, 9E and 9F show a list of descriptors used in the service information of the MPEG-2 TS broadcasting system. In this embodiment, the following descriptors are used in the program arrangement information.

(1) Conditional Access Descriptor
(2) Copyright Descriptor
(3) Network Name Descriptor
(4) Service List Descriptor
(5) Stuffing Descriptor
(6) Satellite Delivery System Descriptor
(7) Terrestrial Delivery System Descriptor
(8) Bouquet Name Descriptor
(9) Service Descriptor
(10) Country Availability Descriptor

(11) Linkage Descriptor
(12) NVOD Reference Descriptor
(13) Time Shifted Service Descriptor
(14) Short Event Descriptor
(15) Extended Event Descriptor
(16) Time Shifted Event Descriptor
(17) Component Descriptor
(18) Mosaic Descriptor
(19) Stream Identifier Descriptor
(20) CA Identifier Descriptor

(21) Content Descriptor
(22) Parental Rating Descriptor
(23) Hierarchical Transmission Descriptor
(24) Digital Copy Control Descriptor
(25) Emergency Information Descriptor
(26) Data Component Descriptor
(27) System Management Descriptor
(28) Local Time Offset Descriptor
(29) Audio Component Descriptor
(30) Target Region Descriptor

(31) Hyperlink Descriptor
(32) Data Content Descriptor
(33) Video Decode Control Descriptor
(34) Basic Local Event Descriptor
(35) Reference Descriptor
(36) Node Relation Descriptor
(37) Short Node Information Descriptor
(38) STC Reference Descriptor
(39) Partial Reception Descriptor
(40) Series Descriptor

(41) Event Group Descriptor
(42) SI transmission parameter descriptor (SI Parameter Descriptor)
(43) Broadcaster Name Descriptor
(44) Component Group Descriptor
(45) SI Prime TS Descriptor
(46) Board Information Descriptor
(47) LDT Linkage Descriptor
(48) Connected Transmission Descriptor
(49) TS Information Descriptor
(50) Extended Broadcaster Descriptor

(51) Logo Transmission Descriptor
(52) Content Availability Descriptor
(53) Carousel Compatible Composite Descriptor
(54) Conditional Playback Descriptor
(55) AVC Video Descriptor
(56) AVC Timing and HRD Descriptor
(57) Service Group Descriptor
(58) MPEG-4 Audio Descriptor
(59) MPEG-4 Audio Extension Descriptor
(60) Registration Descriptor

(61) Data Broadcast Id Descriptor
(62) Access Control Descriptor
(63) Area Broadcasting Information Descriptor
(64) Material Information Descriptor
(65) HEVC Video Descriptor
(66) Hierarchy Descriptor
(67) Communication cooperation information descriptor (Hybrid Information Descriptor)
(68) Scrambler Descriptor
(69) Descriptor set by operator

<Descriptors used in digital broadcasting>
FIG. 9G shows a list of descriptors used other than the service information of the MPEG-2 TS broadcasting system. In this embodiment, the following descriptors are used as descriptors other than program service information.

(1) Partial transport stream descriptor
(Partial Transport Stream Descriptor)
(2) Network Identification Descriptor
(3) Partial transport stream time descriptor
(Partial Transport Stream Time Descriptor)
(4) Download Content Descriptor
(5) CA_EMM_TS_Descriptor (CA EMM TS Descriptor)
(6) CA Contract Information Descriptor
(7) CA Service Descriptor
(8) Carousel Identifier Descriptor
(9) Association Tag Descriptor
(10) Extended Association Tag Descriptor
(Deferred Association tags Descriptor)
(11) Network Download Content Descriptor
(Network Download Content Descriptor)
(12) Download Protection Descriptor
(13) CA Startup Descriptor
(14) Descriptors set by the operator

<Descriptor used in INT>
FIG. 9H shows a list of descriptors used in INT of the MPEG-2 TS broadcasting system. In this embodiment, the following descriptors are used in INT. The descriptors used in the above-mentioned program arrangement information and the descriptors used in other than the program arrangement information are not used in INT.

(1) Target Smartcard Descriptor
(2) Target IP Address Descriptor
(3) Target IPv6 Address Descriptor
(4) IP/MAC Platform Name Descriptor
(5) IP/MAC platform provider name descriptor
(IP/MAC Platform Provider Name Descriptor)
(6) IP/MAC Stream Location Descriptor
(7) Descriptor set by the operator

<Descriptors used in AIT>
FIG. 9I shows a list of descriptors used in the AIT of the MPEG-2 TS broadcasting system. In this embodiment, the following descriptors are used in AIT. The descriptors used in the above-mentioned program arrangement information and the descriptors used in other than the program arrangement information are not used in INT.

(1) Application Descriptor
(2) Transport Protocol Descriptor
(3) Simple application location descriptor
(Simple Application Location Descriptor)
(4) Application boundary authority setting descriptor
(Application Boundary and Permission Descriptor)
(5) Autostart Priority Descriptor
(6) Cache Control Info Descriptor
(7) Randomized Latency Descriptor
(8) External application control descriptor
(External Application Control Descriptor)
(9) Recording/playback application descriptor (Playback Application Descriptor)
(10) Simple recording/playback application location descriptor
(Simple Playback Application Location Descriptor)
(11) Application Expiration Descriptor
(12) Descriptor set by the operator

[MMT system]
The broadcasting system of this embodiment can also support the MMT system as a media transport system for transmitting data such as video and audio. Specifically, of the OFDM transmission waves (2) and (3) in FIG. 4D, the format of the stream transmitted in the layer in which the advanced terrestrial digital broadcasting service is transmitted is, in principle, the MMT format. Also, among the streams obtained by demodulating the transmission wave in the second tuner/demodulator 130T of the broadcast receiving apparatus 100 of FIG. is. Similarly, among the streams obtained by demodulating the transmission wave in the third tuner/demodulator 130L, the format of the stream corresponding to the layer in which the advanced digital terrestrial broadcasting service is transmitted is, in principle, MMT. As a modification, an MPEG-2 TS stream may be used in an advanced terrestrial digital broadcasting service. The format of the stream obtained by demodulating the transmission wave in the fourth tuner/demodulator 130B is MMT.

In recent years, the MMT system has been adapted to MPEG-2 TS in response to environmental changes related to content distribution, such as the diversification of content, the diversification of devices that use content, the diversification of transmission paths for distributing content, and the diversification of content storage environments. This is a newly formulated media transport method due to limitations in the functions of the method.

The code of the video signal and audio signal of the broadcast program is set to MFU (Media Fragment Unit)/MPU (Media Processing Unit), put on MMTP (MMT Protocol) payload, MMTP packetized, and transmitted as IP packet. Also, the data content and caption signals related to the broadcast program are also in the MFU/MPU format, placed on the MMTP payload, converted into MMTP packets, and transmitted as IP packets.

For transmission of MMTP packets, UDP/IP (User Datagram Protocol/Internet Protocol) is used for broadcast transmission lines, and UDP/IP or TCP/IP (Transmission Control Protocol/Internet Protocol) is used for communication lines. Also, in a broadcast transmission path, a TLV multiplexing scheme may be used for efficient transmission of IP packets.

FIG. 10A shows the protocol stack of MMT on the broadcast transmission path. Also, FIG. 10B shows an MMT protocol stack in a communication line. The MMT system provides a mechanism for transmitting two types of control information, MMT-SI and TLV-SI. MMT-SI is control information indicating the structure of a broadcast program. This control information is in the form of an MMT control message, put on an MMTP payload, converted into an MMTP packet, and transmitted as an IP packet. TLV-SI is control information related to multiplexing of IP packets, and provides information for channel selection and correspondence information between IP addresses and services.

[Control signal of broadcasting system using MMT method]
As described above, in the MMT system, TLV-SI and MMT-SI are prepared as control information. TLV-SI consists of tables and descriptors. Tables are transmitted in section format and descriptors are placed within the table. MMT-SI is composed of three layers: messages storing tables and descriptors, tables with elements and attributes indicating specific information, and descriptors indicating more detailed information.

<Tables used in TLV-SI>
FIG. 10C shows a list of tables used in the TLV-SI of the MMT broadcasting system. In this embodiment, the table shown below is used as the TLV-SI table. Further, a table having the same meaning as each table shown in FIGS. 9B and 9C may be used.

(1) Network Information Table for TLV
(2) Address Map Table
(3) Tables set by business operators

<Descriptor used in TLV-SI>
FIG. 10D shows a list of descriptors used in TLV-SI of the MMT broadcasting system. In this embodiment, the following is used as the TLV-SI descriptor. Further, descriptors having the same meaning as the descriptors shown in FIGS. 9D, 9E, 9F, 9G, 9H, and 9I may be used.

(1) Service List Descriptor
(2) Satellite Delivery System Descriptor
(3) System Management Descriptor
(4) Network Name Descriptor
(5) Remote Control Key Descriptor
(6) Descriptors set by business operators

<Messages 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 MMT-SI messages are used.

(1) PA (Package Access) message (2) M2 section message (3) CA message (4) M2 short section message (5) Data transmission message (6) Message set by operator

<Tables used in MMT-SI>
FIG. 10F shows a list of tables used in MMT-SI of the MMT broadcasting system. In this embodiment, the following MMT-SI table is used. Further, a table having the same meaning as each table shown in FIGS. 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) EMMs (Entitlement Management Messages)
(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 table (Data Directory Management Table)
(19) DAM table (Data Asset Management Table)
(20) DCC table (Data Content Configuration Table)
(21) EMT (Event Message Table)
(22) Tables set by business operators

<Descriptor used in MMT-SI>
10G, 10H and 10I show a list of descriptors used in MMT-SI of the MMT broadcasting system. In this embodiment, the following are used as MMT-SI descriptors. Further, descriptors having the same meaning as the descriptors shown in FIGS. 9D, 9E, 9F, 9G, 9H, and 9I may be used.

(1) Asset Group Descriptor
(2) Event Package Descriptor
(3) Background Color Descriptor
(4) MPU Presentation Region Descriptor
(5) MPU Timestamp Descriptor
(6) Dependency Descriptor
(7) Access Control Descriptor
(8) Scrambler Descriptor
(9) Message Authentication Method Descriptor
(10) Emergency Information Descriptor

(11) MH-MPEG-4 Audio Descriptor
(12) MH-MPEG-4 audio extension descriptor
(MH-MPEG-4 Audio Extension Descriptor)
(13) MH-HEVC Descriptor
(14) MH-Linkage Descriptor
(15) MH-Event Group Descriptor
(16) MH-Service List Descriptor
(17) MH-Short Event Descriptor
(18) MH-Extended Event Descriptor
(19) Video Component Descriptor
(20) MH-Stream Identifier Descriptor

(21) MH-Content Descriptor
(22) MH-Parental Rating Descriptor
(23) MH-Audio Component Descriptor
(24) MH-Target Region Descriptor
(25) MH-Series Descriptor
(26) MH-SI Transmission Parameter Descriptor (MH-SI Parameter Descriptor)
(27) MH-Broadcaster Name Descriptor
(28) MH-Service Descriptor
(29) IP Data Flow Descriptor
(30) MH-CA Startup Descriptor

(31) MH-Type Descriptor
(32) MH-Info Descriptor
(33) MH-Expire Descriptor
(34) MH-CompressionType descriptor
(MH-Compression Type Descriptor)
(35) MH-Data Component Descriptor
(36) UTC-NPT Reference Descriptor
(37) Event Message Descriptor
(38) MH-Local Time Offset Descriptor
(39) MH-Component Group Descriptor
(40) MH-Logo Transmission Descriptor

(41) MPU Extended Timestamp Descriptor
(42) MPU Download Content Descriptor
(43) MH-Network Download Content Descriptor
(MH-Network Download Content Descriptor)
(44) Application descriptor (MH-Application Descriptor)
(45) MH-Transport Protocol Descriptor
(46) MH-Simple Application Location Descriptor
(MH-Simple Application Location Descriptor)
(47) Application Boundary Authority Setting Descriptor
(MH-Application Boundary and Permission Descriptor)
(48) MH-Autostart Priority Descriptor
(49) MH-Cache Control Info Descriptor
(50) MH-Randomized Latency Descriptor

(51) Linked PU Descriptor
(52) Locked Cache Descriptor
(53) Unlocked Cache Descriptor
(54) MH-DL Protection Descriptor
(55) Application Service Descriptor
(56) MPU Node Descriptor
(57) PU Structure Descriptor
(58) MH-Hierarchy Descriptor
(59) Content Copy Control Descriptor
(60) Content Usage Control Descriptor

(61) Emergency News Descriptor
(62) MH-CA Contract Info Descriptor
(63) MH-CA Service Descriptor
(64) MH-External Application Control Descriptor
(MH-External Application Control Descriptor)
(65) MH-Recording and Playback Application Descriptor
(MH-Playback Application Descriptor)
(66) MH-Simple Record and Play Application Location Descriptor
(MH-Simple Playback Application Location Descriptor)
(67) MH-Application Expiration Descriptor
(MH-Application Expiration Descriptor)
(68) Related Broadcaster Descriptor
(69) Multimedia Service Descriptor
(70) MH-Stuffing Descriptor
(71) MH-Broadcast ID Descriptor
(72) MH-Network Identification Descriptor
(73) Descriptor set by operator

<Relationship between data transmission and each control information in the MMT method>
FIG. 10J shows the relationship between data transmission and representative tables in the MMT broadcasting system.

In the MMT broadcasting system, data transmission can be performed through a plurality of paths such as a TLV stream via a broadcasting transmission line and an IP data flow via a communication line. The TLV stream includes TLV-SI such as TLV-NIT and AMT, and IP data flow, which is a data flow of IP packets. An IP data flow includes a video asset including a series of video MPUs and an audio asset including a series of audio MPUs. Furthermore, the IP data flow may include a caption asset including a series of caption MPUs, a text superimposition asset including a series of text superimposition MPUs, a data asset including a series of data MPUs, and the like. These various assets are associated in units of packages by an MPT (MMT package table) that is stored and transmitted in a PA message. Specifically, the package ID and the asset ID of each asset included in the package may be associated and described in the MPT.

The assets that make up the package can be only assets in the TLV stream, but they can also include assets that are transmitted in the IP data flow of the communication line, as shown in Figure 10J. This can be realized by including the location information of each asset included in the package in the MPT so that the broadcast receiving apparatus 100 can grasp the reference destination of each asset. As the location information of each asset, it is possible to designate various data to be transmitted through various transmission routes described below.
(1) Data multiplexed in the same IP data flow as MPT (2) Data multiplexed in IPv4 data flow (3) Data multiplexed in IPv6 data flow (4) Multiplexed in broadcast MPEG2-TS (5) Data multiplexed in MPEG2-TS format in the IP data flow (6) Data at the designated URL

The MMT broadcasting system also has the concept of an event. An event is a concept indicating a so-called program handled by MH-EIT sent in an M2 section message. Specifically, in the package indicated by the event package descriptor stored in the MH-EIT, a series of data included in the duration time period from the start time stored in the MH-EIT is included in the concept of the event. The data it contains. The MH-EIT can be used in the broadcast receiving apparatus 100 for various kinds of processing (for example, processing for generating a program guide, control of recording reservations and viewing reservations, and copyright management processing such as temporary storage) on an event-by-event basis.

[Channel setting processing of broadcast receiving device]
<Initial Scan>
In current terrestrial digital broadcasting, network IDs are different for each transmission master, and information on other stations is generally not described in the NIT. Therefore, the broadcast receiving apparatus 100 of the embodiment of the present invention, which has compatibility with the current terrestrial digital broadcasting, is compatible with the terrestrial digital broadcasting of the embodiment of the present invention (advanced terrestrial digital broadcasting, or advanced terrestrial digital broadcasting and current terrestrial digital broadcasting). A function that searches (in other words, scans) all receivable channels at a reception point and creates a service list (receivable frequency table) based on service IDs for digital terrestrial broadcasting that is transmitted simultaneously on a separate layer from broadcasting). must have In addition, in areas where the same network ID can be received on different physical channels by MFN (Multi Frequency Network), basically select a channel with good reception C / N or BER (Bit Error Rate) It is only necessary to operate so as to store it in the service list. The service list is stored, for example, in RAM 104 or storage unit 110 in FIG. 2A.

In addition, in the advanced BS digital broadcasting or advanced CS digital broadcasting received by the fourth tuner/demodulator 130B of FIG. It is only necessary to obtain and store the list, there is no need to create a service list. Therefore, the advanced BS digital broadcast or the advanced CS digital broadcast received by the fourth tuner/demodulator 130B does not require initial scanning and rescanning, which will be described later.

<Rescan>
The broadcast receiving apparatus 100 of the embodiment of the present invention has a rescanning function in preparation for the opening of a new station, the installation of a new relay station, the change of the receiving point of the television receiver, and the like. When changing the preset information, the broadcast receiving apparatus 100 can notify the user to that effect.

<Example of operation at initial scan/rescan>
FIG. 11A shows an example of an operation sequence of channel setting processing (initial scan/rescan) of the broadcast receiving apparatus 100 according to the embodiment of the present invention. Although FIG. 1 shows an example in which MPEG-2 TS is used as the media transport method, basically the same processing is performed when the MMT method is used.

In the channel setting process, first, the reception function control unit 1102 sets the residential area based on the user's instruction (S101). The setting of the residential area is the selection of the area where the broadcast receiving device 100 is installed. At this time, the broadcast receiving device 100 may automatically set the residential area based on the installation position information of the broadcast receiving device 100 acquired by predetermined processing instead of the user's instruction. As an example of the installation position information acquisition process, information may be acquired from the network to which the LAN communication unit 121 is connected, or information regarding the installation position may be acquired from an external device to which the digital interface unit 125 is connected. Next, the broadcast receiving apparatus 100 sets the initial value of the frequency range to be scanned, and performs tuning to the set frequency. /Demodulation section 130T and third tuner/demodulation section 130L are described in this manner when not distinguished from each other (S102).

The tuner/demodulator performs tuning based on the instruction (S103), and if the lock to the set frequency is successful (S103: Yes), the process proceeds to S104. If the lock is not successful (S103: No), the process proceeds to S111. In the process of S104, the broadcast receiving apparatus 100 confirms the C/N (S104), and when the C/N of a predetermined value or higher is obtained (S104: Yes), proceeds to the process of S105, and performs the reception confirmation process. conduct. If the C/N equal to or higher than the predetermined value is not obtained (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, the reception function control unit 1102 obtains and checks the NIT to confirm whether the NIT is valid data (S106). If 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. Also, the reception function control section 1102 acquires distribution system information regarding the physical conditions of the broadcast transmission line corresponding to each transport stream ID/original network ID from the terrestrial distribution system descriptor. Also, the reception function control unit 1102 acquires a list of service IDs from the service list descriptor.

Next, the reception function control unit 1102 confirms the service list stored in the reception device (for example, the RAM 14 or the storage unit 110 in FIG. 2A) to confirm that the transport stream ID acquired in the process of S106 has already been acquired. It is confirmed whether or not there is (S107). If the transport stream ID acquired in the process of S106 is not already acquired (S107: No), the reception function control unit 1102 associates the various information acquired in the process of S106 with the transport stream ID and adds them to the service list. (S108). If the transport stream ID acquired in the process of S106 has already been acquired (S107: Yes), the reception function control unit 1102 acquires the BER acquired in the process of S105 and the transport stream ID already described in the service list. A comparison with the actual BER is performed (S109). As a result, if the BER acquired in the process of S105 is better (S109: Yes), the reception function control unit 1102 updates the service list using various information acquired in the process of S106 (S110). . If the BER acquired in the process of S105 is not better (S109: No), the reception function control unit 1102 discards the various information acquired in the process of S106.

Further, during the service list creation (addition/update) process described above, the remote control key ID may be obtained from the TS information descriptor, and the representative service for each transport stream may be associated with the remote control key. This process enables one-touch channel selection, which will be described later.

After completing the reception confirmation process, the reception function control unit 1102 confirms whether or not the current frequency setting is the final value of the frequency range to be scanned (S111). If the current frequency setting is not the final value of the frequency range to be scanned (S111: No), the broadcast receiving apparatus 100 increases the frequency value set in the tuner/demodulator (S112), and performs S103 to S110. Repeat process. If the current frequency setting is the final value of the frequency range to be scanned (S111: Yes), the process proceeds to S113.

In the process of S113, the broadcast receiving apparatus 100 presents the service list created (added/updated) in the process described above to the user as a result of the channel setting process (S113). The presentation is performed using the monitor unit 192 or the like in FIG. 2A. In addition, if there is duplication of remote control keys, etc., the broadcast receiving apparatus 100 may notify the user to that effect and prompt the user to change the remote control key settings (S114). The service list created/updated in the above process is stored in non-volatile memory such as ROM 103 and storage unit 110 of broadcast receiving apparatus 100 .

FIG. 11B shows an example of the NIT data structure. "transport_stream_id" in the figure corresponds to the aforementioned transport stream ID, and "original_network_id" corresponds to the original network ID. FIG. 11C also shows an example data structure of a Terrestrial Distribution System Descriptor. "guard_interval", "transmission_mode", "frequency", etc. in the figure correspond to the aforementioned distribution system information. FIG. 11D shows an example data structure of a service list descriptor. "service_id" in the figure corresponds to the aforementioned service ID. FIG. 11E shows an example of the data structure of the TS information descriptor. "remote_control_key_id" in the figure corresponds to the aforementioned remote control key ID.

Note that the broadcast receiving apparatus 100 may be controlled so as to appropriately change the frequency range to be scanned according to the broadcast service to be received. For example, when the broadcast receiving apparatus 100 receives broadcast waves of the current terrestrial digital broadcasting service, it is controlled to scan the frequency range of 470 to 770 MHz (corresponding to physical channels 13ch to 62ch). That is, the broadcast receiving apparatus 100 sets the initial value of the frequency range to 470 to 476 MHz (center frequency of 473 MHz), sets the final value of the frequency range to 764 to 770 MHz (center frequency of 767 MHz), and sets +6 MHz in the process of S112. control so as to increase the frequency value of

Also, when the broadcast receiving apparatus 100 receives broadcast waves including advanced terrestrial digital broadcasting services, the broadcast receiving apparatus 100 controls to scan the frequency range of 470 to 1010 MHz. This is because the frequency range of 470 to 1010 MHz may have undergone the frequency conversion processing shown in FIG. 7D or the frequency conversion amplification processing shown in FIG. 8C. That is, the broadcast receiving apparatus 100 sets the initial value of the frequency range to 470 to 476 MHz (center frequency of 473 MHz), sets the final value of the frequency range to 1004 to 1010 MHz (center frequency of 1007 MHz), and sets +6 MHz in the process of S112. control so as to increase the frequency value of Note that even when the broadcast receiving device 100 is receiving the advanced terrestrial digital broadcasting service, if it is determined that the above-described frequency conversion processing and frequency conversion amplification processing are not performed, the broadcast receiving device 100 may be controlled to scan only the frequency range of 470-770 MHz. The selection control of the frequency range to be scanned can be performed by the broadcast receiving apparatus 100 based on the system identification of the TMCC information, the frequency conversion process identification, and the like.

Further, when the broadcasting system of the embodiment of the present invention has the configuration shown in, for example, FIG. One of the unit 131H and the channel selection/detection unit 131V may scan the frequency range of 470 to 770 MHz, and the other may scan the frequency range of 770 to 1010 MHz (detected by the other channel selection/detection unit). (when frequency conversion processing is applied to the transmitted wave in the polarized wave). Based on the system identification and frequency conversion processing identification of the TMCC information, if such control is performed, scanning in unnecessary frequency ranges can be omitted, and the time required for channel setting can be reduced. Furthermore, in this case, both the tuning/detection unit 131H and the tuning/detection unit 131V may advance the operation sequence of FIG. 11A in parallel to synchronize the frequency up loop of S112. In this case, in the same-timing loop in the frequency-up loop of S112 in the operation sequence of FIG. , it becomes possible to decode the control information and the like inside the packet stream of the advanced terrestrial digital service transmitted in pairs of the horizontally polarized signal and the vertically polarized wave signal, and acquire them during the loop processing. This is preferable because scanning and service list creation proceed efficiently.

Similarly, broadcast receiving apparatus 100 has a so-called double tuner configuration (for example, a third tuner/demodulator in FIG. A configuration including a plurality of units 130L or a configuration shown in FIG. 8D), and when receiving an advanced terrestrial digital broadcasting service of a hierarchical division multiplexing transmission system, one of the double tuners has a frequency of 470 to 770 MHz A range may be scanned, while the frequency range of 770-1010 MHz may be scanned (if frequency conversion amplification is applied). By controlling in this manner, it is possible to reduce the time required for channel setting as described above.

As explained with reference to FIGS. 8A, 8B, and 8C, in the configuration shown in FIG. 8B, the terrestrial digital broadcasting service transmitted in either the upper hierarchy or the lower hierarchy is the current terrestrial digital broadcasting service. be. Therefore, for example, among the frequency range of 470 to 770 MHz and the frequency range of 770 to 1010 MHz, the frequency range in which the current terrestrial digital broadcasting service is transmitted is scanned by the first tuner/demodulator 130C in FIG. A frequency range may be scanned in parallel by the third tuner/demodulator 130L. In this case as well, it is possible to reduce the time required for channel setting in the same manner as the above-described parallel scanning by the double tuner of the third tuner/demodulator 130L. Whether the current digital terrestrial broadcasting service is transmitted or the advanced digital terrestrial broadcasting service is transmitted in the frequency range of 470 to 770 MHz or the frequency range of 770 to 1010 MHz depends on the operation of initial scanning/rescanning. Before starting the sequence, two points, one for each frequency range, for example, 470 to 476 MHz (center frequency 473 MHz) and 770 to 776 MHz (center frequency 773 MHz), are scanned by the third tuner/demodulator 130L. It can be identified by receiving, acquiring TMCC information transmitted on each frequency, and referring to parameters (for example, system identification parameters) stored in the TMCC information.

In the advanced terrestrial digital broadcasting service of the dual-polarization transmission system, for example, the horizontal polarization signal and the vertical polarization signal such as the 4K broadcast program of the C layer shown in the hierarchical division example of (1) in FIG. 7A For channels that have broadcast programs that transmit using both, scanning both the 470-770 MHz frequency range and the 770-1010 MHz frequency range will detect the same transport ID, but as one channel. Listed in the service list. Further, in the case of the 2K broadcast program on the B layer shown in the figure, when the same broadcast program is transmitted in the B layer of the horizontal polarization signal and the B layer of the vertical polarization signal, the same transport Even if the ID is detected, it can be stored in the service list as one channel. That is, when the same broadcast program is transmitted in the same layer transmitted with different polarized waves, it is recognized as being merged into one channel and not recognized as separate channels. In this way, in the channel selection process using the service list, it is possible to avoid user confusion due to the existence of exactly the same broadcast program on another channel.

On the other hand, in an advanced terrestrial digital broadcasting service using a dual-polarization transmission system, when different broadcast programs are transmitted in the B layer of the horizontal polarization signal and the B layer of the vertical polarization signal (B If a tier is treated as a virtual D-tier), it is stored in the service list as a different channel. Whether or not the same broadcast program is transmitted in the B layer of the horizontal polarization signal and the B layer of the vertical polarization signal is determined by referring to the additional layer transmission identification parameter of the TMCC information in the broadcast receiving apparatus 100. If you judge, you can identify it.

[Channel selection processing of broadcast receiving device]
The broadcast receiving apparatus 100 according to the embodiment of the present invention has functions for program selection, such as one-touch channel selection using a one-touch key on a remote control, channel up/down channel selection using a channel up/down key on a remote control, and 10 key on a remote control. It has functions such as direct channel selection by directly inputting the 3-digit number used. Any channel selection function may be performed using the information stored in the service list generated by the initial scanning/rescanning described above. In addition, after tuning, the information of the channel selected by banner display etc. ), presence/absence of video resolution up/down conversion, number of audio channels, presence/absence of audio down-mix, etc.). In this way, the user can visually obtain information on the channel after tuning, and can confirm whether or not the desired channel has been tuned. An example of processing in each channel selection method is described below.

<Example of processing for one-touch channel selection>
(1) By pressing a one-touch key on the remote control, the service of "service_id" specified by "remote_control_key_id" is selected.
(2) Set last mode and display channel information after tuning.

<Processing example of up/down channel selection by channel up/down button>
(1) By pressing the channel up/down key on the remote control, channels are selected in the order of the three-digit number used for direct channel selection.
(1-1) When the up key is pressed, the upper adjacent service of the three-digit number is selected. However, if the current three-digit number is the maximum value in the service list, the service with the minimum number is selected.
(1-2) When the down key is pressed, select the adjacent service on the lower side of the three-digit number. However, if the current three-digit number is the minimum value in the service list, the service with the maximum number is selected.
(2) Set last mode and display channel information after tuning.

<Example of processing for direct channel selection>
(1) When direct channel selection is selected, the system waits for input of a three-digit number.
(2-1) If the input of the 3-digit number is not completed within a predetermined time (about 5 seconds), the normal mode is restored and the channel information of the currently selected service is displayed.
(2-2) When the input of the 3-digit number is completed, it is determined whether or not the channel exists in the service list of the receivable frequency table, and if not, a message such as "This channel does not exist" is displayed. do.
(3) If there is a channel, perform channel selection processing, set the last mode, and display channel information after channel selection.

Note that the channel selection operation is performed based on the SI, and when it is determined that the broadcasting is suspended, it may have a function of displaying that fact to notify the user.

<Remote controller for broadcast receiver>
FIG. 12A shows an example of an external view of a remote controller (remote controller) used for inputting operation instructions to the broadcast receiving apparatus 100 according to the embodiment of the present invention.

The remote controller 180R has a power key 180R1 for powering on/off (standby on/off) the broadcast receiving apparatus 100, and cursor keys (up, down, left, right) 180R2 for moving the cursor up, down, left, and right. , a determination key 180R3 for determining the item at the cursor position as a selection item, and a return key 180R4.

The remote control 180R also includes a network switching key (advanced terrestrial digital broadcasting, terrestrial digital broadcasting, advanced BS, BS, CS) 180R5 for switching the broadcasting network received by the broadcast receiving apparatus 100. FIG. The remote controller 180R has one-touch keys (1 to 12) 180R6 used for one-touch tuning, channel up/down keys 180R7 used for channel up/down tuning, and three-digit number input for direct tuning. and 10 keys used for In the example shown in the figure, the 10 key is also used as the one-touch key 180R6, and in the case of direct channel selection, a three-digit number can be input by operating the one-touch key 180R6 after pressing the key 180R8 directly. .

The remote controller 180R also includes a d key 180RB used for data broadcasting services, multimedia services, etc., a link key 180RC for displaying a list of broadcast and communication link services and corresponding applications, and color keys (blue, red, green, etc.). , yellow) 180RD. In data broadcasting services, multimedia services, broadcasting and communication cooperation services, etc., detailed operations can be performed using the cursor key 180R2, enter key 180R3, return key 180R4, and color key 180RD.

The remote controller 180R also has an EPG key 180R9 for displaying a program table and a menu key 180RA for displaying a system menu. The program table and system menu can be operated in detail by using the cursor key 180R2, decision key 180R3, and return key 180R4.

The remote controller 180R also includes a video key 180RE for selecting a related video, a voice key 180RF for switching the audio ES and switching between two languages, and a key 180RF for switching subtitles on/off and switching subtitle languages. and a subtitle key 180RG for The remote controller 180R also includes a volume key 180RH for increasing/decreasing the volume of audio output, and a mute key 180RI for switching ON/OFF of the audio output.

<Processing example of network switching by advanced terrestrial digital key>
The remote controller 180R of the broadcast receiving apparatus 100 of the embodiment of the present invention has an "advanced terrestrial digital key", a "terrestrial digital key", an "advanced BS key", a "BS key" and a "CS key" as the network switching key 180R5. Here, "advanced terrestrial digital key" and "terrestrial digital key" are used in the advanced terrestrial digital broadcasting service, for example, when simultaneous broadcasting of 4K broadcast programs and 2K broadcast programs is carried out in different layers, "advanced terrestrial digital key" It may be configured such that 4K broadcast program selection is prioritized during channel selection in the depressed state, and 2K broadcast program selection is prioritized during channel selection in the "terrestrial digital key" depressed state. By controlling in this way, for example, when there are many errors in the transmission wave of the 4K broadcast program under conditions where it is possible to receive the 4K broadcast program, pressing the "terrestrial digital key" will force the 2K broadcast. Control such as selection of a program becomes possible. Also, when simultaneous broadcasting of 4K broadcast programs and 2K broadcast programs is being carried out on different layers, and there are many errors in the transmission waves of 4K broadcast programs under conditions where it is possible to receive 4K broadcast programs, A 2K broadcast program (simultaneous selection of a 4K broadcast program) may be selected even when the "advanced terrestrial digital key" is pressed.

<Screen display example when selecting a channel>
As described above, the broadcast receiving apparatus 100 according to the embodiment of the present invention, when executing channel selection by one-touch tuning, channel up/down tuning, direct tuning, or the like, displays the selected channel by banner display or the like. It has the function of displaying information.

FIG. 12B shows an example of banner display at the time of channel selection. A banner display 192A1 is an example of a banner display displayed when a 2K broadcast program is selected. For example, the program name, program start/end time, network type, remote control direct channel selection key number, and service logo. and a three-digit number should be displayed. Also, the banner display 192A2 is an example of a banner display displayed when a 4K broadcast program is selected. For example, in addition to the information similar to the banner display 192A1 described above, the program being received is a 4K broadcast program. A mark that symbolizes "altitude" is also displayed. Further, when resolution conversion processing, downmix processing, or the like has been performed, a display to that effect may be provided. An example of the banner display 192A2 indicates that down-conversion processing from UHD resolution to HD resolution and down-mixing processing from 22.2ch to 5.1ch have been performed.

By performing these displays in the broadcast receiving device 100, when the same content is broadcast simultaneously as broadcast programs of different quality such as 2K broadcast programs and 4K broadcast programs by simultaneous broadcasting etc., which broadcast program The user can preferably grasp whether is displayed.

According to the advanced digital broadcasting service system having some or all of the functions according to the embodiments of the present invention described above, more sophisticated advanced digital broadcasting services are available in consideration of compatibility with current digital broadcasting services. It becomes possible to provide transmission technology and reception technology for broadcasting services. In other words, it is possible to provide a technique for more preferably transmitting or receiving advanced digital broadcasting services.

(Example 2)
A second embodiment of the present invention will be described below. It should be noted that the configuration, processing, effects, etc. of the second embodiment are the same as those of the first embodiment unless otherwise specified. Therefore, the differences between the second embodiment and the first embodiment will be mainly described below, and descriptions of the common points will be omitted as much as possible to avoid duplication.

Control processing, identification processing, specific processing, and the like by the broadcast receiving apparatus 100 in the second embodiment are executed by the main control unit 101 in FIG. 2A unless otherwise specified.

[Simultaneous broadcasting using the same physical channel]
In the terrestrial digital broadcasting service of this embodiment, simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service using a hierarchical structure is possible on the same physical channel. In the simulcast service, broadcast programs with the same content can be simultaneously transmitted with different resolutions (broadcasting methods including resolution). The transmission of the main control information when performing the simulcast may be performed according to the following standards (1) to (3). It should be noted that the expressions "strong hierarchy" and "strong hierarchy" described in the following description indicate a hierarchy that adopts a relatively strong modulation scheme, and the expressions "weak hierarchy" and "weak hierarchy" are used. The expression "hierarchy" refers to a hierarchy that employs relatively weak modulation schemes. The expression "middle layer" means a layer that employs a weaker modulation scheme than the "strong layer" and a stronger modulation scheme than the "weak layer".
(1) NIT transports both 2K and 4K services at the strongest layer.
• PAT carries both 2K and 4K services on the 2K service layer.
- Among the ESs specified in the PMT transmitted in the 4K service layer,
An ES related only to 4K services is transmitted in the 4K service layer.
(2)・NIT transmits 2K services at the strongest layer,
Information related to 4K services is transmitted in the 4K service layer.
- PAT is transmitted on the 2K service layer for 2K services,
Information related to 4K services is transmitted in the 4K service layer.
- Among the ESs specified in the PMT transmitted in the 4K service layer,
An ES related only to 4K services is transmitted in the 4K service layer.
(3)・NIT transmits 2K services at the strongest layer,
Information related to 4K services is transmitted in the 4K service layer.
- PAT is transmitted on the 2K service layer for 2K services,
Information related to 4K services is transmitted in the 4K service layer.
- The ES specified in the PMT transmitted in the 4K service layer is
All are transmitted in the 4K service layer.

In FIG. 13A, when performing simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service using the hierarchical structure shown in (1) of FIG. 7A or (2) of FIG. An example of the transmission configuration of control information in accordance with the criterion of (1) is shown.

The transmission configuration shown in FIG. 13A is a terrestrial digital broadcasting service that employs a dual-polarization transmission system, and is a simultaneous transmission of 2K broadcasting service and 4K broadcasting service in the hierarchical division shown in the hierarchical division example of (1) in FIG. 7A. When broadcasting, or a terrestrial digital broadcasting service that adopts a single polarized wave transmission method, simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service is performed by hierarchical division shown in the hierarchical division example of (2) in FIG. 7J. This is an example of a case where partial reception service is provided on layer A (strong layer), 2K broadcasting service for fixed reception is provided on layer B (middle layer), and 4K broadcasting service for fixed reception is provided on layer C (weak layer). This is an example of performing

In this case, the NIT should be transmitted in the A layer, and the PAT should be transmitted in the B layer. As for PMT, PMT mainly related to partial reception service should be transmitted in layer A, PMT mainly related to 2K broadcasting service should be transmitted in layer B, and PMT mainly related to 4K broadcasting service should be transmitted in layer C. Also, in the partial reception service, the ES mainly related to the partial reception service should be transmitted in the A layer. In the 2K broadcasting service, the ES related to the 2K broadcasting service is mainly transmitted on the B layer, and the ES related to the partial reception service should refer to the A layer. In the 4K broadcasting service, the ES related to the 4K broadcasting service is mainly transmitted on the C layer, the ES related to the partial reception service refers to the A layer, and the ES related to the 2K broadcasting service refers to the B layer.

With such a control information transmission configuration, it is possible to obtain service information regarding both 2K broadcasting services and 4K broadcasting services simply by referring to the A layer.

In FIG. 13B, when performing simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service using the hierarchical structure shown in (1) of FIG. 7A or (2) of FIG. An example of the transmission configuration of control information when the standard of (2) is followed is shown.

The transmission configuration shown in FIG. 13B is a terrestrial digital broadcasting service that employs a dual-polarization transmission system, and the simultaneous transmission of 2K broadcasting service and 4K broadcasting service in the hierarchical division shown in the hierarchical division example of (1) in FIG. 7A. When broadcasting, or a terrestrial digital broadcasting service that adopts a single polarized wave transmission method, simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service is performed by hierarchical division shown in the hierarchical division example of (2) in FIG. 7J. This is an example of a case where partial reception service is provided on layer A (strong layer), 2K broadcasting service for fixed reception is provided on layer B (middle layer), and 4K broadcasting service for fixed reception is provided on layer C (weak layer). This is an example of performing

In this case, the NIT for the 2K broadcasting service should be transmitted on the A layer, and the NIT for the 4K broadcasting service should be transmitted on the C layer. Also, the PAT for the 2K broadcasting service may be transmitted on the B layer, and the PAT for the 4K broadcasting service may be transmitted on the C layer. As for PMT, PMT mainly related to partial reception service should be transmitted in layer A, PMT mainly related to 2K broadcasting service should be transmitted in layer B, and PMT mainly related to 4K broadcasting service should be transmitted in layer C. Also, in the partial reception service, the ES mainly related to the partial reception service should be transmitted in the A layer. In the 2K broadcasting service, the ES related to the 2K broadcasting service is mainly transmitted on the B layer, and the ES related to the partial reception service should refer to the A layer. In the 4K broadcasting service, the ES related to the 4K broadcasting service is mainly transmitted on the C layer, the ES related to the partial reception service refers to the A layer, and the ES related to the 2K broadcasting service refers to the B layer.

By adopting such a transmission configuration of control information, in the case of a conventional broadcast receiving device that does not support 4K broadcast services, information about 4K broadcast services is not wastefully acquired by referring only to layers A and B. to be completed.

In FIG. 13C, when implementing simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service using the hierarchical structure shown in (1) of FIG. 7A or (2) of FIG. An example of the transmission configuration of control information when the standard of (3) is followed is shown.

The transmission configuration shown in FIG. 13C is a terrestrial digital broadcasting service that employs a dual-polarization transmission system, and is a simultaneous transmission of 2K broadcasting service and 4K broadcasting service in hierarchical division shown in the hierarchical division example of (1) in FIG. 7A. When broadcasting, or a terrestrial digital broadcasting service that adopts a single polarized wave transmission method, simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service is performed by hierarchical division shown in the hierarchical division example of (2) in FIG. 7J. This is an example of a case where partial reception service is provided on layer A (strong layer), 2K broadcasting service for fixed reception is provided on layer B (middle layer), and 4K broadcasting service for fixed reception is provided on layer C (weak layer). This is an example of performing

In this case, the NIT for the 2K broadcasting service should be transmitted on the A layer, and the NIT for the 4K broadcasting service should be transmitted on the C layer. Also, the PAT for the 2K broadcasting service may be transmitted on the B layer, and the PAT for the 4K broadcasting service may be transmitted on the C layer. As for PMT, PMT mainly related to partial reception service should be transmitted in layer A, PMT mainly related to 2K broadcasting service should be transmitted in layer B, and PMT mainly related to 4K broadcasting service should be transmitted in layer C. Also, in the partial reception service, the ES mainly related to the partial reception service should be transmitted in the A layer. In the 2K broadcasting service, the ES related to the 2K broadcasting service is mainly transmitted on the B layer, and the ES related to the partial reception service should refer to the A layer. In the 4K broadcasting service, mainly all ES related to the 4K broadcasting service are transmitted in the C layer, and the A layer and the B layer are not referred to.

By adopting such a transmission configuration of control information, in the case of a conventional broadcast receiving device that does not support 4K broadcast services, only the A layer and the B layer are referred to acquire information about the 2K broadcast service, and the 4K broadcast is performed. It is possible to avoid unnecessary acquisition of information on services, and further, when referring to 4K broadcasting services with a broadcast receiving device compatible with 4K broadcasting services, acquire information on 4K broadcasting services by referring only to the C layer. It becomes possible to

Note that in the example of the transmission configuration of control information in FIG. 13C, the same audio ES and the like are transmitted in the 4K broadcasting service and the 2K broadcasting service, respectively. Alternatively, different PIDs may be set.

In FIG. 13D, when performing simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service using the hierarchical structure shown in FIG. An example of the transmission configuration of control information is shown.

The transmission configuration shown in FIG. 13D is a terrestrial digital broadcasting service that employs the hierarchical division multiplexing transmission system, and is an example of simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service with hierarchical division shown in FIG. 8A. , the A layer (strong layer) of the upper layer performs partial reception service, the B layer (middle layer) of the upper layer performs 2K broadcasting service for fixed reception, and the lower layer (lower layer) (weak This is an example of a case where a 4K broadcasting service for fixed reception is performed in layer).

In this case, the NIT should be transmitted in the A layer, which is the upper layer, and the PAT should be transmitted in the B layer, which is the upper layer. In addition, regarding PMT, PMT mainly related to partial reception service is transmitted in the upper hierarchical layer A, PMT mainly related to 2K broadcasting service is transmitted in the upper hierarchical layer B, and PMT mainly related to 4K broadcasting service is transmitted in the lower layer. It should be transmitted in layers. In addition, in the partial reception service, the ES mainly related to the partial reception service may be transmitted in the A hierarchy of the upper hierarchy. In the 2K broadcasting service, the ES related to the 2K broadcasting service is mainly transmitted in the B layer of the upper layer, and the ES related to the partial reception service should refer to the A layer of the upper layer. In the 4K broadcasting service, the ES related to the 4K broadcasting service is mainly transmitted in the lower layer, the ES related to the partial reception service refers to the upper layer A layer, and the ES related to the 2K broadcasting service refers to the upper layer B layer. You can refer to it.

In addition, the lower layer may transmit a 4K broadcast service with all segments as the A layer of the lower layer, or a partial reception service (part of the upper layer) with one segment as the A layer of the lower layer. may be the same as the received service), and the remaining segments are used as the B layer of the lower layer to transmit the 4K broadcast service.

By adopting such a control information transmission configuration, it is possible to acquire service information regarding both 2K broadcasting services and 4K broadcasting services simply by referring to the A layer, which is the upper layer.

In FIG. 13E, when implementing simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service using the hierarchical structure shown in FIG. An example of the transmission configuration of control information is shown.

The transmission configuration shown in FIG. 13E is a terrestrial digital broadcasting service that employs the hierarchical division multiplexing transmission system, and is an example of simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service with hierarchical division shown in FIG. 8A. , the A layer (strong layer) of the upper layer performs partial reception service, the B layer (middle layer) of the upper layer performs 2K broadcasting service for fixed reception, and the lower layer (lower layer) (weak This is an example of a case where a 4K broadcasting service for fixed reception is performed in layer).

In this case, the NIT related to the 2K broadcasting service may be transmitted in the upper hierarchical layer A, and the NIT related to the 4K broadcasting service may be transmitted in the lower hierarchical layer. In addition, the PAT related to the 2K broadcasting service may be transmitted in the B layer of the upper layer, and the PAT related to the 4K broadcasting service may be transmitted in the lower layer. In addition, regarding PMT, PMT mainly related to partial reception service is transmitted in the upper hierarchical layer A, PMT mainly related to 2K broadcasting service is transmitted in the upper hierarchical layer B, and PMT mainly related to 4K broadcasting service is transmitted in the lower layer. It should be transmitted in layers. In addition, in the partial reception service, the ES mainly related to the partial reception service may be transmitted in the A hierarchy of the upper hierarchy. In the 2K broadcasting service, the ES related to the 2K broadcasting service is mainly transmitted in the B layer of the upper layer, and the ES related to the partial reception service should refer to the A layer of the upper layer. In the 4K broadcasting service, the ES related to the 4K broadcasting service is mainly transmitted in the lower layer, the ES related to the partial reception service refers to the upper layer A layer, and the ES related to the 2K broadcasting service refers to the upper layer B layer. You can refer to it.

In addition, the lower layer may transmit a 4K broadcast service with all segments as the A layer of the lower layer, or a partial reception service (part of the upper layer) with one segment as the A layer of the lower layer. may be the same as the received service), and the remaining segments are used as the B layer of the lower layer to transmit the 4K broadcast service.

By adopting such a transmission configuration of control information, in the case of a conventional broadcast receiving device that does not support 4K broadcast services, only the upper hierarchy is referred to, and information related to 4K broadcast services is not wastefully acquired. become.

In FIG. 13F, when performing simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service using the hierarchical structure shown in FIG. An example of the transmission configuration of control information is shown.

The transmission configuration shown in FIG. 13F is a terrestrial digital broadcasting service that adopts the hierarchical division multiplexing transmission system, and is an example of simultaneous broadcasting of 2K broadcasting service and 4K broadcasting service with hierarchical division shown in FIG. 8A. , the A layer (strong layer) of the upper layer performs partial reception service, the B layer (middle layer) of the upper layer performs 2K broadcasting service for fixed reception, and the lower layer (lower layer) (weak This is an example of a case where a 4K broadcasting service for fixed reception is performed in layer).

In this case, the NIT related to the 2K broadcasting service may be transmitted in the upper hierarchical layer A, and the NIT related to the 4K broadcasting service may be transmitted in the lower hierarchical layer. In addition, the PAT related to the 2K broadcasting service may be transmitted in the B layer of the upper layer, and the PAT related to the 4K broadcasting service may be transmitted in the lower layer. In addition, regarding PMT, PMT mainly related to partial reception service is transmitted in the upper hierarchical layer A, PMT mainly related to 2K broadcasting service is transmitted in the upper hierarchical layer B, and PMT mainly related to 4K broadcasting service is transmitted in the lower layer. It should be transmitted in layers. In addition, in the partial reception service, the ES mainly related to the partial reception service may be transmitted in the A hierarchy of the upper hierarchy. In the 2K broadcasting service, the ES related to the 2K broadcasting service is mainly transmitted in the B layer of the upper layer, and the ES related to the partial reception service should refer to the A layer of the upper layer. In the 4K broadcasting service, all ES mainly related to the 4K broadcasting service are transmitted in the lower layer, and the upper layer is not referred to.

In addition, the lower layer may transmit a 4K broadcast service with all segments as the A layer of the lower layer, or a partial reception service (part of the upper layer) with one segment as the A layer of the lower layer. may be the same as the received service), and the remaining segments are used as the B layer of the lower layer to transmit the 4K broadcast service.

By adopting such a transmission configuration of control information, in the case of a conventional broadcast receiving device that does not support 4K broadcast services, only the upper hierarchy is referred to acquire information on 2K broadcast services, and information on 4K broadcast services. and further, when referring to the 4K broadcasting service with a broadcast receiving device compatible with the 4K broadcasting service, acquire information about the 4K broadcasting service by referring only to the lower layer. becomes possible.

Note that in the example of the transmission configuration of control information in FIG. 13F, the same audio ES and the like are transmitted in the 4K broadcasting service and the 2K broadcasting service, respectively. Alternatively, different PIDs may be set.

It should be noted that the example of the main control information transmission configuration using FIGS. 13A to 13F is illustrated for the case where both the 2K broadcasting service and the 4K broadcasting service use the MPEG-2 TS method as the media transport method. However, even if the media transport method of the 4K broadcasting service is the MMT method, the same control information transmission configuration can be used. In this case, each table arranged in the weak hierarchy (C hierarchy or lower hierarchy) in the figure is synonymous with each table described above and can be replaced with each table prepared according to the MMT standard. be. For example, NIT, PAT, PMT, etc. in the MPEG-2 TS system may be replaced with TLV-NIT, AMT, MPT, PLT, etc. in the MMT system.

In addition, the example of the main control information transmission configuration in FIGS. 13A to 13F is not a simultaneous service using the same physical channel for the 4K broadcasting service and the 2K broadcasting service, but independent 4K broadcasting service and 2K broadcasting service. It is applicable even in the case of

[Channel Setting Process of Broadcast Receiving Device in Simulcast Service]
In the current terrestrial digital broadcasting, the network ID is different for each transmission master, and it is common that the information of other stations is not written in the NIT. By describing information about 2K broadcast programs and information about 4K broadcast programs together, it is possible to improve processing efficiency in channel scanning processing (initial scanning/rescanning), service list creation processing, and the like in broadcast receiving apparatus 100. It becomes possible.

<Operation example 1 at initial scan/rescan>
14A and 14B show an example of an operation sequence of channel setting processing (initial scanning/rescanning) for digital terrestrial broadcasting services including simulcasting, of the broadcast receiving apparatus 100 according to the embodiment of the present invention. Note that FIG. 4 shows an example in which the MPEG-2 TS system is adopted as the media transport system for the 4K broadcasting service, but basically the same processing is performed when the MMT system is adopted.

In the channel setting process, first, the reception function control unit 1102 sets the residential area (selects the area where the broadcast receiving apparatus 100 is installed) based on the user's instruction (S201). At this time, the residential area may be automatically set based on the installation position information of the broadcast receiving apparatus 100 acquired by predetermined processing instead of the user's instruction. As an example of the installation position information acquisition process, information may be acquired from the network to which the LAN communication unit 121 is connected, or information regarding the installation position may be acquired from an external device to which the digital interface unit 125 is connected. Next, the broadcast receiver 100 sets the initial value of the frequency range of the 2K broadcast service to be scanned, and instructs the tuner/demodulator to tune to the set frequency (S202).

The tuner/demodulator performs tuning based on the instruction (S203), and if the lock to the set frequency is successful (S203: Yes), the process proceeds to S204. If the lock is not successful (S203: No), the process proceeds to S211. In the process of S204, the broadcast receiving apparatus 100 confirms the C/N (S204), and when the C/N equal to or higher than the predetermined value is obtained (S204: Yes), proceeds to the process of S205 to perform the reception confirmation process. (2K) is performed. If the C/N equal to or higher than the predetermined value is not obtained (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, the reception function control unit 1102 obtains and checks the NIT to confirm whether the NIT is valid data (S206). If 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. Also, the reception function control section 1102 acquires distribution system information regarding the physical conditions of the broadcast transmission line corresponding to each transport stream ID/original network ID from the terrestrial distribution system descriptor. Also, the reception function control unit 1102 acquires a list of service IDs from the service list descriptor.

Next, the receiving function control unit 1102 checks the service list (2K) stored in the receiving device to check whether the transport stream ID acquired in the process of S206 has already been acquired. (S207). If the transport stream ID acquired in the process of S206 has not already been acquired (S207: No), the reception function control unit 1102 associates the various information acquired in the process of S206 with the transport stream ID, and stores them in the service list (2K). (S208). If the transport stream ID acquired in the process of S206 has already been acquired (S207: Yes), the reception function control unit 1102 acquires the BER acquired in the process of S205 and the transport stream ID already described in the service list. A comparison with the actual BER is performed (S209). As a result, if the BER obtained in the process of S205 is better (S209: Yes), the reception function control unit 1102 updates the service list (2K) using various information obtained in the process of S206. (S210). If the BER acquired in the process of S205 is not better (S209: No), the reception function control unit 1102 discards the various information acquired in the process of S206.

Note that if the channel being tuned and referenced in the process of S203 is a channel that performs a simulcast service, and information about the 4K broadcast service can also be obtained from the NIT referred to in the process of S206, reception function control The unit 1102 performs addition/update processing of the service list (2K) in the processing of S208 or S210, and also performs addition/update processing of the service list (4K).

Also, during the process of creating (adding/updating) the service list (2K) described above, the remote control key ID is obtained from the TS information descriptor, and the representative service for each transport stream is associated with the remote control key. can be This process enables one-touch channel selection.

After completing the reception confirmation process (2K), the reception function control unit 1102 confirms whether or not the current frequency setting is the final value of the frequency range of the 2K broadcast service to be scanned (S211). If the current frequency setting is not the final value of the frequency range of the 2K broadcasting service to be scanned (S211: No), the broadcast receiving device 100 increases the frequency value set in the tuner/demodulator (S212), The processing of S203 to S210 is repeated. If the current frequency setting is the final value of the frequency range of the 2K broadcast service to be scanned (S211: Yes), the process proceeds to S221 in FIG. 14B.

In the process of S221 in FIG. 14B, the broadcast receiving device 100 acquires information on the simulcast service. Information about the simulcast service will be described later. Next, the broadcast receiver 100 sets the initial value of the frequency range of the 4K broadcast service to be scanned, and instructs the tuner/demodulator to tune to the set frequency (S222).

Next, based on the information on the simulcast service acquired in the process of S221, the broadcast receiving apparatus 100 performs the reception confirmation process shown in FIG. It is determined whether or not there is a simulcast relationship with any channel of the 2K broadcasting service acquired in (2K) (S223), and if it is simulcast (S223: Yes), the process proceeds to S232. If it is not simultaneous broadcasting (S223: No), the process proceeds to S224. That is, if the 4K broadcasting service transmitted on the physical channel of the frequency set in the processing of S222 is the simultaneous broadcasting of the 2K broadcasting service, the reception confirmation processing (4K) described later is skipped, and if it is not the simultaneous broadcasting, the reception confirmation processing. (4K).

The tuner/demodulator performs tuning based on the instruction in the process of S222 (S224), and proceeds to the process of S225 if the lock to the set frequency is successful (S224: Yes). If the lock is not successful (S224: No), the process proceeds to S232. In the process of S225, the broadcast receiving apparatus 100 confirms the C/N (S225), and when the C/N equal to or higher than the predetermined value is obtained (S225: Yes), proceeds to the process of S226 to perform the reception confirmation process. (4K). If the C/N equal to or higher than the predetermined value is not obtained (S225: No), 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, the reception function control unit 1102 obtains and checks the NIT to confirm whether the NIT is valid data (S227). If 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. Also, the reception function control section 1102 acquires distribution system information regarding the physical conditions of the broadcast transmission line corresponding to each transport stream ID/original network ID from the terrestrial distribution system descriptor. Also, the reception function control unit 1102 acquires a list of service IDs from the service list descriptor.

Next, the receiving function control unit 1102 checks the service list (4K) stored in the receiving device to check whether the transport stream ID acquired in the process of S227 has already been acquired. (S228). If the transport stream ID acquired in the process of S227 is not already acquired (S228: No), the reception function control unit 1102 associates the various information acquired in the process of S227 with the transport stream ID, and creates a service list (4K). (S229). If the transport stream ID acquired in the process of S227 has already been acquired (S228: Yes), the reception function control unit 1102 acquires the BER acquired in the process of S226 and the transport stream ID already described in the service list. A comparison with the actual BER is performed (S230). As a result, if the BER obtained in the process of S226 is better (S230: Yes), the reception function control unit 1102 updates the service list (4K) using various information obtained in the process of S227. (S231). If the BER acquired in the process of S226 is not better (S230: No), the reception function control section 1102 discards the various information acquired in the process of S227.

Also, during the process of creating (adding/updating) the service list (4K) described above, the remote control key ID is obtained from the TS information descriptor, and the representative service for each transport stream is associated with the remote control key. can be This process enables one-touch channel selection.

After completing the reception confirmation process (4K), the reception function control unit 1102 confirms whether or not the current frequency setting is the final value of the frequency range of the 4K broadcast service to be scanned (S232). If the current frequency setting is not the final value of the frequency range of the 4K broadcasting service to be scanned (S232: No), the broadcast receiving device 100 increases the frequency value set in the tuner/demodulator (S233), The processing of S223 to S231 is repeated. If the current frequency setting is the final value of the frequency range of the 4K broadcast service to be scanned (S232: Yes), the process proceeds to S234.

In the processing of S234, the broadcast receiving apparatus 100 synthesizes the service list (2K) and the service list (4K) created (added/updated) in the above-described processing to create a service list (synthesis) (S234). . Furthermore, the broadcast receiving apparatus 100 presents the created service list (composite) to the user as a result of the channel setting process (S235). The presentation is performed using the monitor unit 192 or the like in FIG. 2A. In addition, if there is duplication of remote control keys, etc., the broadcast receiving apparatus 100 may notify the user to that effect and prompt the user to change the remote control key settings (S236). The service list (composite) created by the above process is stored in non-volatile memory such as ROM 103 and storage unit 110 of broadcast receiving apparatus 100 .

Note that the processing of S221 and the processing of S223 are not essential. That is, the processing of S224 to S233 may be performed for all physical channels in the frequency range of the 4K broadcast service without performing the acquisition processing of information on the simulcast service.

In addition, the process of presenting a service list (composite) as a result of the channel setting process performed in the process of S235, and the display of the remote control key settings for changing settings when there is duplication of remote control keys performed in the process of S236. The process displays only information about the 2K broadcasting service or only information about the 4K broadcasting service depending on whether the internal setting of the broadcast receiving apparatus 100 is the 2K broadcasting service reception mode or the 4K broadcasting service reception mode. It can be processed. That is, in the broadcast receiving apparatus 100, of the "digital terrestrial" key and the "advanced terrestrial digital" key of the network switching key 180R5 of the remote control 180R, the most recently pressed key is the "digital terrestrial" key. is the 2K broadcast service reception mode, only the information about the 2K broadcast service is displayed, and the most recently pressed key is the "advanced terrestrial digital" key, and the internal setting of the broadcast receiving apparatus 100 is in the 4K broadcast service reception mode, only information about the 4K broadcast service is displayed. Alternatively, regardless of whether the internal setting of the broadcast receiving device 100 is the 2K broadcasting service receiving mode or the 4K broadcasting service receiving mode, the broadcast receiving device 100 has information about the 2K broadcasting service and information about the 4K broadcasting service. may be displayed at the same time.

Note that the example of the channel setting process of the broadcast receiving device in the simulcast service using FIGS. 14A and 14B shows the case where both the 2K broadcast service and the 4K broadcast service use the MPEG-2 TS system as the media transport system. However, even if the media transport method of the 4K broadcasting service is the MMT method, the same control information transmission configuration can be used. In this case, each table referred to in the drawing has the same meaning as each table described above and can be replaced with each table prepared according to the MMT standard. For example, NIT in the MPEG-2 TS system can be replaced with TLV-NIT in the MMT system.

<Information on Simul Broadcast Service>
When performing simultaneous broadcasting of a 2K broadcasting service and a 4K broadcasting service, it is preferable to arrange the following descriptors in at least one or both of the paired services of the simultaneous broadcasting. By referring to the following descriptors in the process of S221 in FIG. 14B described above, the 4K broadcast service transmitted on the physical channel of the frequency set in the process of S222 in the process of S223 is performed in the reception confirmation process ( It is possible to determine whether or not there is a simultaneous broadcasting relationship with any channel of the 2K broadcasting service acquired in 2K).

FIG. 14C shows an example of the data structure of the service descriptor. Also, FIG. 14D shows an example of a list of service format types. The service descriptor is a descriptor that is included in the SDT and transmitted, and indicates the organization channel name and the name of the company, together with the service format type. "service_type (service type type)" in the data structure of the service descriptor is a parameter representing the type of service. If this parameter is '0x03', it indicates that the service is a digital TV simulcast service, which means a 2K broadcast service paired with simulcast. Also, if this parameter is "0xAE", it indicates that the service is an ultra-high-definition 4K simulcast service, which means that the service is a 4K broadcast service paired with simulcast.

FIG. 14E shows an example data structure of a service group descriptor. Also, FIG. 14F shows an example of a list of service group types. A service group descriptor is a descriptor that is included in the NIT and transmitted, and indicates that the services are grouped when there is a relationship between a plurality of services. "service_group_type (service group type)" in the data structure of the service group descriptor is a parameter representing the type of service that constitutes the group. If this parameter is '0x2', it indicates that the service is a broadcast-type simultaneous service.

By referring to these descriptors, broadcast receiving apparatus 100 can recognize that the service being received is a simulcast service and that there is a service paired with the service being received. Note that a descriptor different from the descriptor described above may be used to indicate that the service being received is a simulcast service and that there is a service paired with the service being received.

Examples of use of control information such as descriptors in the broadcast receiving apparatus 100 include channel setting processing (initial scan/rescan) for digital terrestrial broadcasting services including the above-mentioned simulcast, as well as the following. be done.

First, regarding the process by which the broadcast receiving apparatus 100 identifies whether or not simulcasting is being performed on the physical channel that is currently being received, the simulcasting that pairs the 2K broadcasting service with the 4K broadcasting service that is being received. The identification process may be performed by the broadcast receiving apparatus 100 determining whether or not control information indicating whether or not is stored. Specifically, if there is "0xAE" in the "service_type (service format type)" of the service descriptor described above, indicating that the corresponding 4K broadcasting service is a 4K broadcasting service that forms a pair of simultaneous broadcasting with respect to the 2K broadcasting service. For example, broadcast receiving apparatus 100 may determine that simultaneous broadcasting is being performed on the physical channel currently being received. Alternatively, if '0x2' indicating that a plurality of services constitute a broadcast-type simul service exists in 'service_group_type (service group type)' of the service group descriptor, the broadcast receiving apparatus 100 is currently receiving It is sufficient to determine that simultaneous broadcasting is being performed on the physical channel where the channel is located. By combining these two determinations, it may be determined whether or not simultaneous broadcasting is performed on the corresponding physical channel.

Next, a process of specifying a service to be paired with simulcast in the broadcast receiving apparatus 100 will be described. By determining whether or not the 4K broadcasting service being received contains control information indicating whether or not it is a paired simultaneous broadcasting of the 2K broadcasting service transmitted on the same physical channel, the broadcast receiving device It has already been explained that 100 can identify whether the physical channel it is currently receiving is performing simulcast or not. Here, in the broadcasting system according to the present embodiment, when performing simultaneous broadcasting of the 2K broadcasting service and the 4K broadcasting service within the same physical channel, only one 2K broadcasting service is transmitted within the same physical channel. The number of 4K broadcasting services transmitted within the same physical channel is limited to one. In this way, the broadcast receiving apparatus 100, in the above-described identification process, only identifies whether or not the physical channel currently being received is carrying out the simulcast, and the simulcast transmitted on the physical channel is performed. 2K broadcasting service and 4K broadcasting service to be paired can be specified. That is, in this identification process, if the 4K broadcasting service is identified by the identification information as a 4K broadcasting service that forms a pair of simultaneous broadcasting, the "service_type (service format type)" in the 2K broadcasting service transmitted within the same physical channel is This is an identification process that identifies the 2K broadcast service as one of a pair of simultaneous broadcasts regardless of the indicated value.

In addition, as another processing example of the identification processing, the 2K broadcasting service transmitted within the same physical channel has "0x03" of "service_type (service type type)" of the above-mentioned service descriptor as "digital TV simultaneous service". It may be a process of determining whether or not there is a 2K broadcast service associated with identification information of the same or corresponding definition. In this case, when there is a 2K broadcasting service indicating "digital TV simulcast service" of "0x03" of "service_type (service format type)", broadcast receiving apparatus 100 regards the 2K broadcasting service as one of a pair of simulcasts. A 4K broadcasting service indicating "super-high-definition 4K simulcast service" with "service_type (service type type)" of "0xAE" may be identified as the other of the simulcast pair. In the other processing example, in the same physical channel, even if there is a 4K broadcast service indicating "super high definition 4K simultaneous service" with "service_type (service type type)" of "0xAE", an error or Due to some problem such as a problem in processing on the transmission side, there is a 2K broadcasting service indicating "digital TV service" with "0x01" in "service_type (service type)", and "0x03" in "service_type (service type)" There may be no 2K broadcast service indicating "digital TV simultaneous service" of ". In this case, in the above another processing example, the 4K broadcasting service indicating the "ultra-high-definition 4K simultaneous service" with "service_type (service format type)" of "0xAE" and the "service_type (service format type)" of " 0x01” indicating “digital TV service” may be identified as not being a pair of simultaneous broadcasting. The result of the identification can be said to be the identification result of determining that the 2K broadcasting service that forms a pair with the 4K broadcasting service of the "ultra-high-definition 4K simultaneous service" cannot be found.

By using the process of identifying whether or not simulcasting is being performed and/or the process of identifying a service to be paired with the simulcasting described above, the broadcast receiving apparatus 100 can perform the above [ Acquisition processing of program information] can be executed regarding services that are paired with simulcast in program information (EPG information) such as EIT. Similarly, by using the process of identifying whether or not the simulcast is being performed and/or the process of identifying the service paired with the simulcast, the broadcast receiving apparatus 100 can perform the above It is possible to perform display control of an EPG screen related to a paired service of the simulcast in [Display example of EPG screen during simulcast].

<Operation example 2 at initial scan/rescan>
FIG. 14G shows a different example of the operation sequence of channel setting processing (initial scan/rescan) for terrestrial digital broadcasting services including simulcasting, of the broadcast receiving apparatus 100 according to the embodiment of the present invention.

In this example of operation, in FIG. This is an operation example in the case of a configuration in which the signal is input to 100, distributed, and input to the first tuner/demodulator 130C and the second tuner/demodulator 130T. Further, in this operation example, in FIG. 2A, the digital broadcast wave of the advanced terrestrial digital broadcasting service received by the hierarchical division multiplexing digital terrestrial broadcasting receiving antenna 200L is input to the broadcast receiving apparatus 100 and then distributed to the first tuner. This is also an operation example in the case of a configuration in which signals are input to the /demodulator 130C and the third tuner/demodulator 130L. Further, in this operation example, a plurality of tuner/demodulators (first tuner/demodulator 130C and second tuner/demodulator 130T, or first tuner/demodulator 130C and third tuner/demodulator 130L) are operated simultaneously. This is an example in which channel setting (scanning) for a 2K broadcasting service and channel setting (scanning) for a 4K broadcasting service are simultaneously performed by controlling.

Note that FIG. 4 shows an example in which the MPEG-2 TS system is adopted as the media transport system for the 4K broadcasting service, but basically the same processing is performed when the MMT system is adopted.

In the channel setting process, first, the reception function control unit 1102 sets the residential area (selects the area where the broadcast receiving apparatus 100 is installed) based on the user's instruction (S301). At this time, the residential area may be automatically set based on the installation position information of the broadcast receiving apparatus 100 acquired by predetermined processing instead of the user's instruction. As an example of the installation position information acquisition process, information may be acquired from the network to which the LAN communication unit 121 is connected, or information regarding the installation position may be acquired from an external device to which the digital interface unit 125 is connected. Next, the broadcast receiver 100 sets the initial value of the frequency range of the 2K broadcast service to be scanned, and instructs the first tuner/demodulator 130C to tune to the set frequency (S302). . The broadcast receiving apparatus 100 sets the initial value of the frequency range of the 4K broadcast service to be scanned at the same time, and tunes to the set frequency by the second tuner/demodulator 130T (or the third tuner/demodulator 130L). (S312).

The first tuner/demodulator 130C performs tuning based on the instruction (S303), and if the lock to the set frequency is successful (S303: Yes), the process proceeds to S304. If the lock is not successful (S303: No), the process proceeds to S306. In the processing of S304, the broadcast receiving apparatus 100 confirms the C/N (S304), and when the C/N of a predetermined value or more is obtained (S304: Yes), the processing proceeds to S305, and the reception confirmation processing is performed. (2K) is performed. If the C/N equal to or higher than the predetermined value is not obtained (S304: No), the process proceeds to S306. In the reception confirmation process (2K), the same processes as S205 to S210 in FIG. 14A are performed.

On the other hand, the second tuner/demodulator 130T (or the third tuner/demodulator 130L) also performs tuning based on the instruction (S313), and if it succeeds in locking to the set frequency (S313: Yes ), the process proceeds to S314. If the lock is not successful (S313: No), the process proceeds to S316. In the process of S314, the broadcast receiving apparatus 100 confirms the C/N (S314), and when the C/N equal to or higher than a predetermined value is obtained (S314: Yes), proceeds to the process of S315 to perform the reception confirmation process. (4K). If C/N equal to or higher than the predetermined value is not obtained (S314: No), the process proceeds to S316. In the reception confirmation process (4K), the same processes as S226 to S231 in FIG. 14B are performed.

After completing the reception confirmation process (2K), the reception function control unit 1102 confirms whether or not the current frequency setting is the final value of the frequency range of the 2K broadcast service to be scanned in the first tuner/demodulation unit 130C (S306). ). If the current frequency setting is not the final value of the frequency range of the 2K broadcasting service to be scanned (S306: No), the broadcast receiving device 100 increases the frequency value set in the first tuner/demodulator 130C ( S327) and the processing of S303 to S305 are repeated. If the current frequency setting is the final value of the frequency range of the 2K broadcast service to be scanned (S306: Yes), the process proceeds to S338.

On the other hand, also in the second tuner/demodulator 130T (or the third tuner/demodulator 130L), when the reception confirmation process (4K) is completed, the reception function control unit 1102 confirms that the current frequency setting is the 4K broadcast service to be scanned. It is checked whether it is the final value of the frequency range (S316). If the current frequency setting is not the final value of the frequency range of the 4K broadcast service to be scanned (S316: No), the broadcast receiving device 100 causes the second tuner/demodulator 130T (or the third tuner/demodulator 130L) to The set frequency value 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 4K broadcast service to be scanned (S306: Yes), the process proceeds to S338.

In the process of S338, the broadcast receiving apparatus 100 updates the service list (2K) created (added/updated) in the reception confirmation process (2K) of S305 and the service created (added/updated) in the reception confirmation process (4K) of S315. The list (4K) is synthesized to create a service list (synthesis) (S338). Furthermore, the broadcast receiving apparatus 100 presents the created service list (composite) to the user as a result of the channel setting process (S339). The presentation is performed using the monitor unit 192 or the like in FIG. 2A. In addition, if there is duplication of remote control keys, etc., the broadcast receiving apparatus 100 may notify the user to that effect and prompt the user to change the remote control key settings (S340). The service list (composite) created by the above process is stored in non-volatile memory such as ROM 103 and storage unit 110 of broadcast receiving apparatus 100 .

According to the operation sequence of the initial scan/rescan according to the operation example of FIG. 14G, the 2K service list and the 4K service list are processed in parallel by performing scan processing in parallel with a plurality of different tuners/demodulators. , it is possible to shorten the time required to obtain a combined service list, compared to the initial scan/rescan operation sequence in FIGS. 14A and 14B.

(Example 3)
Embodiment 3 of the present invention will be described below with reference to FIGS. 15A to 15D. In the following, differences between the third embodiment and the first embodiment will be mainly described. Embodiment 3 is a display device that is a 2K/4K shared receiver capable of receiving 2K and 4K simulcasts, and a method for reproducing video and audio of simulcasts on the display device. shows a configuration for switching to playback of 2K broadcasting corresponds to the above-mentioned current terrestrial digital broadcasting service, and 4K broadcasting corresponds to the above-mentioned advanced terrestrial digital broadcasting service.

FIG. 15A is an explanatory diagram showing transmission/reception of simultaneous broadcasting between the broadcasting station 1501 and the 2K/4K shared receiver that is the display device 1502 of the third embodiment. The simulcast here is broadcasting that transmits both 2K broadcasting including 2K video and audio content and 4K broadcasting including corresponding 4K video and audio content. Broadcast station 1501 has a function of transmitting simulcast. The 2K/4K shared receiver, which is the display device 1502 of the third embodiment, has a function of receiving and playing back (video display and audio output) simultaneous broadcasting. The display device 1502 includes one or more receivers capable of receiving 2K broadcast, 4K broadcast, and simulcast, and a controller that controls the above functions. The control unit is configured by the main control unit 101 shown in FIG. 2A and the like.

In the third embodiment, content such as a broadcast program is content having video and corresponding audio as a set. The mechanism of the present embodiment 3 can be roughly applied similarly.

In the case of simultaneous broadcasting, a broadcasting station 1501 performs recording of a content source, as indicated by “imaging and sound collection (recording)” 1501 . After that, the broadcasting station 1501 performs processing including video encoding and audio encoding for 2K broadcasting, as indicated by video/audio 2K encoding 1512, based on the recorded content data. In parallel with this, the broadcasting station 1501 performs processing including video encoding and audio encoding for 4K broadcasting, as indicated by video/audio 4K encoding 1513 . After that, in the broadcasting station 1501, the 2K broadcast data undergoes signal processing and the like for transmission as a broadcast signal, and is transmitted 1522 through the transmission path by 2K broadcast radio waves. In parallel with this, in the broadcasting station 1501, the 4K broadcast data undergoes signal processing and the like for transmission as a broadcast signal, and is transmitted 1523 through the transmission path by 4K broadcast radio waves. In this way, in simulcasting, content such as programs with the same content but different broadcasting methods are transmitted and received simultaneously in 2K broadcasting and 4K broadcasting.

The display device 1502 according to the third embodiment, which is the receiving side of the above-described simultaneous broadcasting, receives the 2K broadcast radio wave from the transmission 1522 and the 4K broadcast radio wave from the transmission 1523 in parallel. This reception is possible with the configuration described in the first embodiment and the like. The display device 1502 performs 2K video and audio decoding processing on the received 2K broadcast radio waves, as indicated by video/audio 2K decoding/display 1532, and reproduces and displays (video display on the display screen and corresponding audio output). In parallel with this, the display device 1502 performs decoding processing of 4K video and audio on the received 4K broadcast wave, as indicated by video/audio 4K decoding/display 1533, and performs playback display. . Thereby, the user of the display device 1502 can view the content in the broadcasting system selected from 2K or 4K.

FIG. 15B is an explanatory diagram of the time delay that exists in the transmission processing and reception processing of simulcast. , indicating that there is a delay between 4K and 2K broadcasts.

(a) shows transmission processing of simultaneous broadcasting at the broadcasting station 1501 . The transmission process is a process including the video/audio 2K encoding 1512 and the video/audio 4K encoding 1513 described above. In (a), (b), and (c), the horizontal axis is time, and the vertical axis is the difference between 2K and 4K. The time required for the video/audio 2K encoding 1512 is indicated by time T2KC, and the time required for the video/audio 4K encoding 1513 is indicated by time T4KC. In general, the time required for transmission processing related to 4K is longer than the time related to 2K (T4KC>T2KC). Between these 2K and 4K processes, a delay time T1 occurs as shown. Delay time T1 is a transmission processing delay time, and is the difference between time T4KC for video/audio 4K encoding 1513 and time T2KC for video/audio 2K encoding 1512 (T1=T4KC-T2KC).

(b) shows reception processing of the simultaneous broadcast on the display device 1502 . The reception process is a process including the video/audio 2K decoding/display 1532 and the video/audio 4K decoding/display 1533 described above. The time required for the video/audio 2K decoding/display 1532 is indicated by time T2KD, and the time required for the video/audio 4K decoding/display 1533 is indicated by time T4KD. In general, the time required for reception processing related to 4K is longer than the time related to 2K (T4KD>T2KD). Between these 2K and 4K processes, a delay time T2 occurs as shown. The delay time T2 is a reception processing delay time, and is the difference between the time T4KC of the video/audio 4K decoding/display 1533 and the time T2KD of the video/audio 2K decoding/display 1532 (T2=T4KD-T2KD).

Furthermore, (c) shows the total delay time of the simulcast taking into account the delay time T1 on the transmitting side in (a) and the delay time T2 on the receiving side in (b). The total transmission time of 2K broadcasting is indicated by 2K total transmission time T2K. The total transmission time of 4K broadcasting is indicated by 4K total transmission time T4K. The total delay time TT is the difference between these total transmission times (TT=(T4K-T2K)). The total delay time TT is equal to or longer than the sum of the delay time T1 on the transmitting side and the delay time T2 on the receiving side (TT≧(T1+T2)).

As described above, in 4K broadcasting, processing is generally more complicated than in 2K broadcasting, so that each of encoding and decoding/displaying takes more time. For simplicity of explanation, only encoding and decoding/display processing are mentioned here. There is also signal processing for playback, and the required time differs between 2K and 4K. Even including these processes, 4K broadcast takes more processing time than 2K broadcast in total. As a result, the total time required for the sending side to encode and transmit the image and sound after recording and the receiving side to decode and display on the display screen is 2K and 4K as described above. , a deviation occurs as the total delay time TT.

FIG. 15C shows a configuration example of a remote control used in the display device 1502 of the third embodiment. This remote controller is newly provided with a "simul" button 180RJ (in other words, a switching button) in addition to the configuration of the remote controller described above (FIG. 12A). This "simul" button 180RJ is a button for performing an operation of switching reproduction between 2K broadcasting (display screen and audio) and 4K broadcasting (display screen and audio) in simulcast. For example, consider a case where the display device 1502 is reproducing 4K simultaneous broadcasting. Examples of content such as simulcast programs include stock price information, announcements of economic indicators such as the "Short-term Economic Survey of Enterprises in Japan," and emergency bulletins. There are cases and times when the 4K broadcast is being reproduced, and there are cases and times when the user wants to know the details of the content such as the announcement of the economic index as soon as possible. In this case/sometimes, the user presses the "simul" button 180RJ on the remote control. In response to this, the display device 1502 switches the display content on the display screen and the audio output content from 4K broadcasting to 2K broadcasting. As a result, the user can immediately watch the content such as the announcement of the economic index in 2K broadcasting from the time of switching.

According to this configuration, 4K broadcasting, which is a broadcasting service with high image quality and high sound quality, is normally displayed and output as audio, and if necessary, the user presses the "simul" button 180RJ to quickly obtain information through 2K broadcasting.・It is possible to watch. In particular, according to this configuration, by switching from 4K to 2K, the user can quickly view content such as the announcement of economic indicators that is effective for promptness by canceling the delay time between 4K and 2K. Viewing is possible.

Here, an example of using the dedicated "simul" button 180RJ of the remote controller in FIG. 15C to switch between 2K and 4K simulcasting has been described, but such a dedicated button does not necessarily have to be used. For example, as another means/method, the "highland" key (in other words, 4K button) 180R4K and the "terrestrial digital" key (in other words, 2K button) 180R2K of the remote controller in FIG. 15C are used as keys for switching between 2K and 4K. can also

Regarding the reproduction of the simulcast on the display device 1502, whether the 2K broadcast or the 4K broadcast is to be reproduced is preset in the display device 1502 when there is no designation from the user. . By default, 4K broadcasting is set to play back, with a policy of prioritizing viewing with high image quality and high sound quality. The display device 1502 automatically selects and reproduces the 4K broadcast according to the setting when there is no designation from the user when reproducing the simulcast. In the user setting related to simultaneous broadcasting using the user setting function, it is also possible to make a setting that gives priority to reproduction in 2K broadcasting. In this case, the display device 1502 automatically selects and reproduces the 2K broadcast according to the setting when there is no designation from the user when reproducing the simulcast.

FIG. 15D is an explanatory diagram of the concept of processing timing and the like when switching between 2K and 4K playback of simulcast on the display device 1502 of the third embodiment, in relation to the delay time of FIG. 15B. In FIG. 15D, the horizontal axis represents time, and the vertical axis represents each process of the broadcasting station 1501 and the display device 1502 side by side. (a) to (f) show examples of processing and data timing when the display device 1502 receives and reproduces 2K broadcast or 4K broadcast based on transmission of simulcast from the broadcasting station 1501. FIG. From top to bottom, (a) is transmission of 2K broadcasting by broadcasting station 1501, (b) is transmission of 4K broadcasting by broadcasting station 1501, and (c) is processing of receiving and playing back 2K broadcasting on display device 1502. , (d) is the display of the 2K broadcast on the display screen of the display device 1502, (e) is the reception and playback of the 4K broadcast on the display device 1502, and (f) is the display of the display device 1502. The case of 4K broadcast display on the screen is shown. The data shown for each rectangle indicates a data unit of video and audio constituting content such as a program with simulcast. Data d1a, d2a, d3a, d4a, . . . indicate 2K broadcast data (2K data). Data d1b, d2b, d3b, d4b, . . . indicate 4K broadcast data (4K data). For example, the data d1a and the data d1b are data of corresponding contents (including, for example, the same video scene, the same audio, and the same character information).

In 2K broadcasting, processing is relatively simpler than in 4K broadcasting, so video and audio data are encoded and transmitted from broadcasting station 1501 at the timing shown in (a) of FIG. 15D. For example, data d1a is transmitted at time t1. Similarly, in 4K broadcasting, processing is relatively more complicated than in 2K broadcasting, so it takes more time to encode video and audio data, and the timing of transmission is the timing shown in (b). For example, data d1b is transmitted at time t2. The difference between the times t1 and t2 corresponds to the aforementioned delay time T1. Here, for the sake of simplification of explanation, the transmission process is only encoding, but in practice, the above-mentioned transport stream process and the like are also included, so it takes more time.

(c) of FIG. 15D shows the timing of reception and reproduction data acquisition when the 2K broadcast of (a) is received and reproduced by the display device 1502 . The display device 1502 can display the 2K broadcast by outputting to the display screen using the received and reproduced data. For example, data d1a is received at time t3. (d) shows the timing at which the display device 1502 displays the video of the 2K broadcast on the display screen based on the data in (c), which is substantially the same timing as in (c). In addition, the audio of the 2K broadcast is also output at the same timing as the video.

(e) of FIG. 15D shows the timing of reception and reproduction data acquisition when the 4K broadcast of (b) is received and reproduced by the display device 1502 . The display device 1502 can display the 4K broadcast by outputting the received and reproduced data to the display screen. For example, data d1b is received at time t4. (f) shows the timing at which the display device 1502 displays the 4K broadcast video on the display screen based on the data in (d), which is substantially the same timing as in (e). The difference between the times t3 and t4 corresponds to the aforementioned delay time T2.

During normal simulcast, 4K broadcasting is selected according to the settings, and the data flow and timing of 4K broadcasting are in the order of (b), (e), and (f). The data flow and timing of 2K broadcasting when 2K broadcasting is selected are in the order of (a), (c), and (d).

Comparing the 2K display of (d) and the 4K display of (f) in FIG. are also delayed (time points t3, t4, delay time T2). In simulcasting, the same content is broadcast in parallel in 2K and 4K, which are different broadcasting systems. The timing of the display on the screen is off. It should be noted that this delay/difference does not pose a particular problem when content is broadcast only in one of the 2K broadcasting and 4K broadcasting schemes.

Further, (g) of FIG. 15D shows an example of timing and the like when switching reproduction from 4K broadcasting to 2K broadcasting as an operation specific to the display device 1502 of the third embodiment. In the case of normal reception of simulcast, 4K broadcast is displayed on the display screen of display device 1502 as in (f) above. For example, at time t4, the image of data d1b is displayed. Here, there are cases and times when the user needs information about the contents of this simulcast as soon as possible. For example, when acquiring stock price information, when acquiring economic index information such as the "Short-Term Economic Survey of Enterprises in Japan", and when acquiring emergency broadcast information. In this case, the user presses the "simul" (switch) button 180RJ on the remote controller, for example, at time t5.

Then, the display device 1502 switches the display on the display screen from the 4K broadcast reception screen to the 2K broadcast reception screen. For example, 2K broadcast data d4a is displayed immediately from time t5. At time t5, the display device 1502 can receive and reproduce 2K broadcast data (for example, data d4a) as shown in (c). It is possible to switch to reception/playback of data (for example, data d4a). At time t5, when the display of 4K data d2b in (f) is compared with the display of 2K data d4a in (g), the video and audio contents of the content are the same as those of 4K data d2b. In other words, the 2K data d4a is ahead of the 4K data d2b. Therefore, from time t5, the user can obtain and view information on this content as soon as possible through 2K broadcasting. After the data d4a of (g), the illustration of the subsequent data is omitted, but similarly, the display of the 2K broadcast continues according to the subsequent data.

As in (g) above, when switching from 4K broadcasting to 2K broadcasting in simultaneous broadcasting, the display device 1502 switches both the video and audio that make up the content of the broadcast while synchronizing the timing. Not limited to this, as a modification, the target (component) for switching from 4K to 2K may be video only or audio only. That is, the object to which the 4K/2K switching control function described above is applied can be selected from three types: (1) video/audio, (2) video only, and (3) audio only. In (1), both video and audio are switched from 4K broadcasting to 2K broadcasting. In (2), only video is switched from 4K broadcasting to 2K broadcasting, and audio continues to be output as 4K broadcasting. In (3), only audio is switched from 4K broadcasting to 2K broadcasting, and video continues to be output as 4K broadcasting. For example, in the design or initial setting of the display device 1502, the method (1) of switching both video and audio is set. Alternatively, a user setting function or operation of an application of the display device 1502 may allow the user to select and set from these three types.

For example, a certain user may want to view at least the audio only as soon as possible, out of the video and audio of content such as a certain program. In that case, it is possible to switch to the setting of (3) targeting only audio. In the case of this setting, the display device 1502 performs switching from 4K to 2K as shown in (g) of FIG. . The video will continue to be 4K. As a result, the user can quickly listen to the sound after switching. This is an example of switching that has a great advantage for users who want to obtain announcements of economic indicators as voice information as soon as possible.

The advantage of the method (1) for simultaneously switching video and audio is that there is no time lag between audio and video reproduction, so that the user can naturally view video and audio (content in which they are integrated). In the case of this method, switching operation between 4K and 2K is performed, and when the user sees the moment of switching on the display screen, the user knows that 4K has been switched to 2K. For example, in the example of (g) in FIG. 15D, the video content changes from data d1b to data d4a, so this can be understood.

However, if the switching operation is not performed or if the user does not see the switching moment, it may be difficult for the user to judge and recognize whether the switching from 4K to 2K has really occurred. Therefore, as a modification, the display device 1502 displays identification information (for example, a "4K" mark or a "2K" mark) for identifying whether the 4K broadcast is currently being played back or the 2K broadcast is being played back on the display screen ( For example, OSD) may be used, or audio corresponding to the identification information may be output. In addition, when switching from 4K to 2K, the display device 1502 may display identification information indicating that playback has been switched from 4K broadcasting to 2K broadcasting on the display screen, and output audio corresponding to it. You may In the display of these identification information, a part of the original video from the broadcasting station 1501 is hidden by the identification information, but the user can easily judge and recognize whether the switching from 4K to 2K has really occurred.

The method of switching only the video in (2) above (switching the video to 2K and continuing the audio as 4K), or the method of switching only the audio in (3) above (switching the audio to 2K and keeping the video in 4K) method to continue without change) has the following merits. As in the example of FIG. 15D, when the simulcast is switched from 4K to 2K, there is a difference in playback time between the video content and the audio content of the content. Therefore, in the case of these methods, the user can easily recognize that switching is being performed without directly performing the switching operation (pressing the button described above) or even without seeing the moment of switching. In addition, unlike the method (1), these methods do not require the identification information to be output, and the identification information does not partially hide the original image on the display screen.

In the third embodiment described above, a configuration has been described in which the display device 1502 switches the reproduction of the simulcast from 4K to 2K when the user presses the "simul" button 80RJ on the remote controller. Not limited to this, the following are also possible as modifications. In the modified example, the switching from 4K to 2K is triggered by automatic determination by the display device 1502 instead of the user's operation/instruction. The display device 1502 sets, as a control condition, a predetermined simulcast content or a content attribute for which reproduction is automatically switched from 4K to 2K by design or user setting in advance. For example, identification information that identifies individual programs such as programs announcing stock price information or economic indicators, emergency broadcasts, etc., or attribute information that identifies attributes (types, etc.) of such programs is set as a control condition. . The display device 1502 refers to or judges the identification information and attribute information of the content of the broadcast when the normal reproduction of the simulcast is set as 4K, and the set control is performed when the simulcast is received. Determine whether or not the identification information and attribute information of the conditions apply. The display device 1502 automatically switches playback from 4K broadcasts to 2K broadcasts when applicable. In this modified example, it is possible to save the trouble of operation by the user.

The following configuration can be applied to the case where the playback of the simulcast is switched from 4K to 2K and then switched back from 2K to 4K by the functions of the third embodiment. First, when the user presses the “simul” button 180RJ on the remote controller in the 2K broadcast playback state, the display device 1502 switches to the 4K broadcast playback state. At the time of this switching, as in FIG. 15D described above, there is a difference in the reproduction time between the 2K data and the 4K data, so the video content of the content is reproduced a little earlier (for example, the 2K data at time t5 is reproduced). to 4K, the change is from data d3a to data d2b).

Also, when the reproduction of the simulcast is returned from 2K to 4K as described above, the above-described automatic determination by the display device 1502 may be applied as a trigger. The display device 1502, based on the identification information or attributes of the content such as the program that is switched from 4K to 2K and reproduced as described above, for example, while the reception of the content from the broadcasting station 1501 continues. to continue playback at that 2K. The display device 1502 automatically switches from 2K to 4K playback when reception of the content ends, that is, when the program or the like ends. As a result, it is possible to save the trouble of operation by the user. In addition, as a control condition for returning from 2K to 4K as described above, a condition such as a time for continuing reproduction of 2K may be used.

Although examples of embodiments of the present invention have been described above using Examples 1 and 2, the configuration for realizing the technology of the present invention is not limited to the above-described examples, and various modifications are conceivable. For example, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. All these belong to the scope of the present invention. Numerical values, messages, and the like appearing in the sentences and drawings are merely examples, and the effects of the present invention are not impaired even if different ones are used.

Some or all of the above-described functions and the like of the present invention may be realized by hardware by designing them in an integrated circuit, for example. Alternatively, the functions may be realized by software, in which the microprocessor unit or the like interprets and executes an operation program for realizing each function. Hardware and software may be used together.

The software for controlling the broadcast receiving device 100 may be stored in advance in the ROM 103 and/or the storage unit 110 of the broadcast receiving device 100 at the time of product shipment. It may be obtained from a server device on the Internet 800 via the LAN communication unit 121 after product shipment. Also, the software stored in a memory card, an optical disc, or the like may be acquired via the expansion interface section 124 or the like. Similarly, the software for controlling mobile information terminal 700 may be stored in ROM 703 and/or storage unit 710 of mobile information terminal 700 in advance at the time of product shipment. It may be obtained from a server device on the Internet 800 via the LAN communication section 721 or the mobile telephone network communication section 722 after product shipment. Also, the software stored in a memory card, an optical disc, or the like may be acquired via the expansion interface section 724 or the like.

Also, the control lines and information lines shown in the drawings are those considered necessary for explanation, and do not necessarily show all the control lines and information lines on the product. In fact, it may be considered that almost all configurations are interconnected.

100: broadcast receiver, 101: main control unit, 102: system bus, 103: ROM, 104: RAM, 110: storage (accumulation) unit, 121: LAN communication unit, 124: expansion interface unit, 125: digital interface unit , 130C, 130T, 130L, 130B: tuner/demodulation unit, 140S, 140U: decoder unit, 180: operation input unit, 191: video selection unit, 192: monitor unit, 193: video output unit, 194: audio selection unit, 195: speaker unit, 196: audio output unit, 180R: remote controller, 200, 200C, 200T, 200S, 200L, 200B: antenna, 201T, 201L, 201B: conversion unit, 300, 300T, 300S, 300L: radio tower, 400C: Cable TV station headend, 400: Broadcasting station server, 500: Service provider server, 600: Mobile telephone communication server, 600B: Base station, 700: Personal digital assistant, 800: Internet, 800R: Router device.

Claims (6)

one or more receiving units that receive 2K broadcasting, 4K broadcasting, and simultaneous broadcasting in both 2K broadcasting and 4K broadcasting as digital broadcasting;
a control unit;
The control unit
When the simulcast is received by the one or more receiving units, playback including video display is performed in the 4K broadcast format according to the setting or operation from the user,
When the simulcast is being played back in the 4K broadcasting broadcasting method, the playback in the 4K broadcasting broadcasting method is changed to the 2K broadcasting according to the setting for switching from the 4K broadcasting to the 2K broadcasting or the user's operation. switch to playback in the broadcasting system of
display device. The display device according to claim 1,
The user's operation for switching from the 4K broadcast to the 2K broadcast is a remote control button operation.
display device. The display device according to claim 1,
The setting for switching from the 4K broadcast to the 2K broadcast is a setting of identification information or attributes of the content to be switched.
display device. The display device according to claim 1,
The control unit selects from video and audio, video only, and audio only according to settings when switching the simultaneous broadcasting from reproduction in the 4K broadcasting broadcasting system to reproduction in the 2K broadcasting broadcasting system. switch target
display device. The display device according to claim 1,
The playback including video display in the 4K broadcasting broadcasting method includes video display and audio playback,
In the switching of the simultaneous broadcasting by the control unit, the target of switching from the reproduction in the 4K broadcasting broadcasting system to the reproduction in the 2K broadcasting broadcasting system is the audio reproduction, and the audio reproduction is the broadcasting system of the 4K broadcasting. is switched from playback to playback in the 2K broadcasting broadcasting system, and the video display continues to play in the 4K broadcasting broadcasting system,
display device. A display device comprising one or more receivers and a controller for receiving 2K broadcasting, 4K broadcasting, and simultaneous broadcasting in both 2K broadcasting and 4K broadcasting as digital broadcasting A playback method comprising:
As a step executed by the control unit,
When the simulcast is received by the one or more receiving units, a step of performing reproduction including video display in the 4K broadcasting broadcasting format according to the setting or operation from the user;
When the simulcast is being played back in the 4K broadcasting broadcasting method, the playback in the 4K broadcasting broadcasting method is changed to the 2K broadcasting according to the setting for switching from the 4K broadcasting to the 2K broadcasting or the user's operation. a step of switching to playback in the broadcasting system of
A playing method.

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