JP2021087116A - Time management method - Google Patents

Abstract

To provide a technique for more preferably transmitting or receiving an advanced digital broadcasting service.SOLUTION: In a time management method in a broadcast receiving device that manages a time using an NTP transmitted from a broadcast transmission system, the NTP transmitted from the broadcast transmission system is used to synchronize an NTP system clock in a receiver to control the NTP system clock in the receiver. In the control, when the leap second measurement in the NTP transmitted from the broadcast transmission system is performed, the broadcast receiving device is configured that the operation of reflection processing of the leap second adjustment in the NTP system clock in the receiver is made different depending on whether a program played using the NTP system clock in the receiver is being viewed.SELECTED DRAWING: Figure 18A

Description

The present invention relates to a broadcast transmission technique or a broadcast reception technique.

In place of the conventional analog broadcasting service, digital broadcasting service was started in each country in the latter half of the 1990s. Digital broadcasting services include improvement of broadcasting quality using error correction technology, multimedia and HD (High Definition) using compression coding technology, BML (Broadcast Markup Language) and HTML5 (Hyper Text Markup Language). The service used has been made into multimedia, etc.

In recent years, advanced digital broadcasting systems have been studied in various countries for the purpose of further improving frequency usage efficiency, higher resolution, and higher functionality.

Japanese Unexamined Patent Publication No. 2016-14420

More than 10 years have already passed since the start of the current digital broadcasting service, and broadcasting receiving devices capable of receiving the current digital broadcasting service are sufficiently widespread. Therefore, when starting the advanced digital broadcasting service that is currently under consideration, it is necessary to consider compatibility with the current digital broadcasting service. That is, it is preferable to realize UHD (Ultra High Definition) of the video signal while maintaining the viewing environment of the current digital broadcasting service.

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

An object of the present invention is to provide a technique for more preferably transmitting or receiving a higher-performance advanced digital broadcasting service in consideration of compatibility with the current digital broadcasting service.

As a means for solving the above-mentioned problems, the technique described in the claims is used.

For example, it is a time management method in a broadcast receiving device that manages time using an NTP transmitted from a broadcast transmission system, and an in-receiver NTP system clock using the NTP transmitted from the broadcast transmission system. Synchronous processing is performed to control the NTP system clock in the receiver, and in the control, when the leap second is adjusted in the NTP transmitted from the broadcast transmission system, the NTP in the receiver is adjusted in the broadcast receiving device. The operation of the leap second adjustment reflection process in the NTP system clock in the receiver may be configured to be different depending on whether or not the program to be reproduced using the system clock is being viewed.

According to the present invention, it is possible to provide a technique for more preferably transmitting or receiving an advanced digital broadcasting service.

It is a system block diagram of the broadcasting system which concerns on one Example of this invention. It is a block diagram of the broadcast receiving apparatus which concerns on one Example of this invention. It is a detailed block diagram of the 1st tuner / demodulation part of the broadcast receiving apparatus which concerns on one Embodiment of this invention. It is a detailed block diagram of the 2nd tuner / demodulation part of the broadcast receiving apparatus which concerns on one Embodiment of this invention. It is a detailed block diagram of the third tuner / demodulation part of the broadcast receiving apparatus which concerns on one Embodiment of this invention. It is a detailed block diagram of the 4th tuner / demodulation part of the broadcast receiving apparatus which concerns on one Embodiment of this invention. It is a detailed block diagram of the 1st decoder part of the broadcast receiving apparatus which concerns on one Embodiment of this invention. It is a detailed block diagram of the 2nd decoder part of the broadcast receiving apparatus which concerns on one Embodiment of this invention. It is a software block diagram of the broadcast receiving apparatus which concerns on one Example of this invention. It is a block diagram of the broadcasting station server which concerns on one Example of this invention. It is a block diagram of the service provider server which concerns on one Example of this invention. It is a figure explaining the segment structure which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the layer allocation in the layer transmission which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the generation process of the OFDM transmission wave which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the basic structure of the transmission line coding part which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the segment parameter of the OFDM system which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the transmission signal parameter which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the arrangement of the pilot signal of the synchronous modulation segment which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the arrangement of the pilot signal of the differential modulation segment which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the bit allocation of the TMCC carrier which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the bit allocation of TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the transmission parameter information of TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the system identification of TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the carrier modulation mapping system of TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the frequency conversion processing identification of the TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the physical channel number identification of the TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining an example of the main signal identification of TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the 4K signal transmission layer identification of the TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the additional layer transmission identification of TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the identification of the coding rate of the internal code of the TMCC information which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the bit allocation of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining composition identification of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the seismic motion warning information of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the signal identification of the seismic motion warning information of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the seismic motion warning detailed information of the seismic motion warning information of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the seismic motion warning detailed information of the seismic motion warning information of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the additional information about the transmission control of the modulated wave of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the transmission parameter addition information of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the error correction method of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the NUC format of the AC signal which concerns on the digital broadcasting of one Example of this invention. It is a figure explaining the polarization dual-purpose transmission system which concerns on one Example of this invention. It is a system block diagram of the broadcasting system using the polarization dual-purpose transmission system which concerns on one Example of this invention. It is a system block diagram of the broadcasting system using the polarization dual-purpose transmission system which concerns on one Example of this invention. It is a figure explaining the frequency conversion process which concerns on one Example of this invention. It is a figure explaining the structure of the pass-through transmission system which concerns on one Example of this invention. It is a figure explaining the pass-through transmission band which concerns on one Example of this invention. It is a figure explaining the structure of the pass-through transmission system which concerns on one Example of this invention. It is a figure explaining the pass-through transmission band which concerns on one Example of this invention. It is a figure explaining the pass-through transmission band which concerns on one Example of this invention. It is a figure explaining the layer division multiplexing transmission system which concerns on one Example of this invention. It is a system block diagram of the broadcasting system using the layer division multiplex transmission system which concerns on one Example of this invention. It is a figure explaining the frequency conversion amplification process which concerns on one Example of this invention. It is a figure explaining the protocol stack of MPEG-2 TS. It is a figure explaining the name and function of the table used in MPEG-2 TS. It is a figure explaining the name and function of the table used in MPEG-2 TS. It is a figure explaining the name and function of the descriptor used in MPEG-2 TS. It is a figure explaining the name and function of the descriptor used in MPEG-2 TS. It is a figure explaining the name and function of the descriptor used in MPEG-2 TS. It is a figure explaining the name and function of the descriptor used in MPEG-2 TS. It is a figure explaining the name and function of the descriptor used in MPEG-2 TS. It is a figure explaining the name and function of the descriptor used in MPEG-2 TS. It is a figure explaining the protocol stack in the broadcast transmission line of MMT. It is a figure explaining the protocol stack in the communication line of MMT. It is a figure explaining the name and function of the table used in TLV-SI of MMT. It is a figure explaining the name and function of the descriptor used in TLV-SI of MMT. It is a figure explaining the name and function of the message used in MMT-SI of MMT. It is a figure explaining the name and function of the table used in MMT-SI of MMT. It is a figure explaining the name and function of the descriptor used in MMT-SI of MMT. It is a figure explaining the name and function of the descriptor used in MMT-SI of MMT. It is a figure explaining the name and function of the descriptor used in MMT-SI of MMT. It is a figure explaining the relationship between the data transmission of the MMT system and each table. It is an operation sequence diagram of the channel setting process of the broadcast receiving apparatus 100 which concerns on one Example of this invention. It is a figure explaining the data structure of the network information table. It is a figure explaining the data structure of the ground distribution system descriptor. It is a figure explaining the data structure of a service list descriptor. It is a figure explaining the data structure of the TS information descriptor. It is an external view of the remote controller which concerns on one Example of this invention. It is a figure explaining the banner display at the time of channel selection which concerns on one Example of this invention. It is a figure explaining the system clock configuration which concerns on one Example of this invention. It is a figure explaining the data format of the TS packet in the MPEG2-TS system. It is a figure explaining the structure of the NTP format. It is a figure explaining the data structure of the MPU time stamp descriptor. It is a figure explaining the switching guidance to the backup broadcasting when the reception state deteriorates. It is a figure explaining the case where the switching guidance to the backup broadcast is performed by the cooperation terminal when the reception state deteriorates. It is a figure explaining the leap second adjustment of the time insertion in the NTP system clock. It is a figure explaining the leap second adjustment of time deletion in the NTP system clock. It is a figure explaining the data structure of TOT. It is a figure explaining the data structure of JST_time. It is a figure explaining the data structure of EIT.

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 device 100 and an antenna 200, a broadcasting station radio tower 300 and a broadcasting station server 400, a service provider server 500, a mobile telephone communication server 600 and a mobile telephone communication network base station 600B, 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. Further, various server devices and communication devices may be further connected to the Internet 800.

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

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 mobile 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 perform data transmission / reception via the router device 800R. The router device 800R, the broadcast receiving device 100, and the personal digital assistant 700 form a LAN (Local Area Network). The communication between the broadcast receiving device 100 and the mobile information terminal 700 may be directly performed 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 a broadcasting facility of a broadcasting station, and transmits digital broadcasting waves including various control information related to a digital broadcasting service and content data (video content, audio content, etc.) of a broadcasting program. The broadcasting station also includes a broadcasting station server 400. The broadcasting station server 400 stores the content data of the broadcasting program and metadata such as the program title, program ID, program outline, performers, broadcasting date and time of each broadcasting program. The broadcasting station server 400 provides the content data and the metadata to the service provider based on the contract. The content data and the metadata are provided to the service provider through the API (Application Programming Interface) provided in the broadcasting station server 400.

The service provider server 500 is a server device prepared by the service provider to provide a service by the broadcast communication cooperation system. The service provider server 500 stores, manages, and manages the content data and metadata provided by the broadcasting station server 400, and the content data and applications (operation programs and / or various data, etc.) created for the broadcasting communication cooperation system. Deliver etc. It also has a function to search for available applications and provide a list in response to inquiries from TV receivers. 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 different providers. A plurality of service provider servers 500 may be prepared for different services. Further, the function 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, while it is 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 data by communication between the mobile information terminal 700 and each server device on the Internet 800. Can be sent and received. The communication between the mobile information terminal 700 and the broadcast receiving device 100 may be performed via the base station 600B, the mobile telephone communication server 600, the Internet 800, and the router device 800R.

[Hardware configuration of broadcast receiver]
FIG. 2A is a block diagram showing an example of the internal configuration of the broadcast receiving device 100.

The broadcast receiving device 100 includes a main control unit 101, a system bus 102, a ROM 103, a RAM 104, a storage (storage) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 125, a first tuner / demodulation unit 130C, and a third unit. 2 tuner / demodulation unit 130T, 3rd tuner / demodulation unit 130L, 4th tuner / demodulation unit 130B, 1st decoder unit 140S, 2nd decoder unit 140U, operation input unit 180, video selection unit 191 and monitor unit 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 unit 101 is a microprocessor unit that controls the entire broadcast receiving device 100 according to a predetermined operation program. The system bus 102 is a communication path for transmitting and receiving various data, commands, and the like between the main control unit 101 and each operation block in the broadcast receiving device 100.

The ROM (Read Only Memory) 103 is a non-volatile memory in which basic operation programs such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM (Electrical Erasable Program ROM) or a flash ROM Used. Further, the ROM 103 stores operation setting values and the like necessary for the operation of the broadcast receiving device 100. The RAM (Random Access Memory) 104 serves as a work area for executing a basic operation program and other operation programs. The ROM 103 and the RAM 104 may be integrated with the main control unit 101. Further, the ROM 103 may not have an independent configuration as shown in FIG. 2A, but may use a partial storage area in the storage (storage) unit 110.

The storage (storage) unit 110 stores an operation program of the broadcast receiving device 100, an operation setting value, personal information of a user of the broadcast receiving device 100, and the like. In addition, an operation program downloaded via the Internet 800 and various data created by the operation program can be stored. In addition, contents such as moving images, still images, and sounds acquired from broadcast waves or downloaded via the Internet 800 can also be stored. A part of the function of the ROM 103 may be replaced by a part of the storage (storage) unit 110. Further, the storage (storage) unit 110 needs to hold the stored information even when the broadcast receiving device 100 is not supplied with power from the outside. Therefore, for example, a device such as a semiconductor element memory such as a flash ROM or SSD (Solid State Drive), a magnetic disk drive such as an HDD (Hard Disk Drive), or the like is used.

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

The LAN communication unit 121 is connected to the Internet 800 via the router device 800R, and transmits / receives data to / from each server device and other communication devices on the Internet 800. It also acquires content data (or a 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 a code circuit, a decoding circuit, and the like. Further, the broadcast receiving device 100 may further include other communication units such as a Bluetooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

The first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, and the fourth tuner / demodulation unit 130B receive the broadcast wave of the digital broadcasting service, respectively, and receive the broadcast wave of the main control unit 101. Channel selection processing (channel selection) is performed by tuning to a predetermined service channel based on control. Further, the packet stream is reproduced by performing demodulation processing of the modulated wave of the received signal, waveform shaping processing, etc., reconstruction processing of the frame structure and hierarchical structure, energy back diffusion processing, error correction / decoding processing, and the like. Further, the transmission TMCC (Transmission Multiplexing Control) signal is extracted and decoded from the received signal.

The first tuner / demodulation unit 130C can input the digital broadcast wave of the current terrestrial digital broadcasting service received by the antenna 200C, which is the current antenna for receiving terrestrial digital broadcasting. Further, the first tuner / demodulation unit 130C inputs a broadcast signal of one of the horizontal (H) polarization signal and the vertical (V) polarization signal of the polarized terrestrial digital broadcasting described later, and is currently used. It is also possible to demodulate the segments of the hierarchy that employ the same modulation scheme of the terrestrial digital broadcasting service of. Further, the first tuner / demodulation unit 130C can input a broadcast signal of the layer-divided multiplex terrestrial digital broadcasting described later to demodulate the layer adopting the same modulation method as the current terrestrial digital broadcasting service. The second tuner / demodulation unit 130T inputs the digital broadcast wave of the advanced terrestrial digital broadcasting service received by the antenna 200T, which is an antenna for receiving polarized terrestrial digital broadcasting, via the conversion unit 201T. The third tuner / demodulation unit 130L inputs the digital broadcast wave of the advanced terrestrial digital broadcasting service received by the antenna 200L, which is a time division multiplexing terrestrial digital broadcasting receiving antenna, via the conversion unit 201L. The fourth tuner / demodulator 130B converts digital broadcast waves of advanced BS (Broadcasting Satellite) digital broadcasting service and advanced CS (Communication Satellite) digital broadcasting service received by antenna 200B, which is a BS / CS shared reception antenna. Input via 201B.

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

Further, the antenna 200C, the antenna 200T, the antenna 200L, the antenna 200B, the conversion unit 201T, the conversion unit 201L, and the conversion unit 201B do not form a part of the broadcast reception device 100, but the building in which the broadcast reception device 100 is installed. It belongs to the equipment side such as.

Further, the above-mentioned current terrestrial digital broadcasting is a broadcasting signal of a terrestrial digital broadcasting service that transmits an image having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically.

Further, although the details of the polarization terrestrial digital broadcasting (advanced terrestrial digital broadcasting adopting the polarization ambivalent transmission method) will be described later, it is possible to transmit an image having a maximum resolution of pixels exceeding 1920 horizontal pixels × 1080 vertical pixels. It is a broadcast signal of a terrestrial digital broadcasting service. Polarized terrestrial digital broadcasting is terrestrial digital broadcasting that uses a plurality of polarizations of horizontal (H) polarization and vertical (V) polarization, and is a divided part in both polarizations of the plurality of polarizations. In this segment, a terrestrial digital broadcasting service capable of transmitting a video having a maximum resolution of a number of pixels exceeding 1920 horizontal pixels × 1080 vertical pixels is transmitted.

In the description of each embodiment of the present invention, when the expression "plurality of polarized waves" is used for polarized terrestrial digital broadcasting, unless otherwise specified, horizontal (H) polarization and vertical (V) bias are used. It means two polarizations of a wave. Further, even when the expression "polarization" is simply used, it means "polarization signal". Further, the same modulation method is used for the above-mentioned current terrestrial digital broadcasting that transmits a video having a maximum resolution of 1920 pixels horizontally × 1080 pixels vertically in a part of the divided segments in one or both polarizations of a plurality of polarizations. Can be transmitted with. That is, in the bipolar terrestrial digital broadcasting, the current terrestrial digital broadcasting service that transmits an image having a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels in a plurality of segments having different polarizations in each embodiment of the present invention and horizontal It is possible to simultaneously transmit a terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels × 1080 vertical pixels.

Further, although the details of the layer-divided multiplex terrestrial digital broadcasting (advanced terrestrial digital broadcasting adopting the layer-divided multiplex transmission method) will be described later, it is possible to transmit a video having a maximum resolution of pixels exceeding 1920 horizontal pixels × 1080 vertical pixels. It is a broadcast signal of a terrestrial digital broadcasting service. Layer division multiplex terrestrial digital broadcasting is to multiplex a plurality of digital broadcasting signals having different signal levels. Note that digital broadcast signals with different signal levels mean that the power for transmitting the digital broadcast signal is different. The layered multiplex terrestrial digital broadcasting of each embodiment of the present invention is a broadcasting of the current terrestrial digital broadcasting service that transmits a video having a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels as a plurality of digital broadcasting signals having different signal levels. It is possible to transmit a signal and a broadcast signal of a terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels by layer-multiplexing in the frequency band of the same physical channel. That is, in the layer-divided multiplex terrestrial digital broadcasting of each embodiment of the present invention, the current terrestrial digital broadcasting service that transmits an image having a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels in a plurality of layers having different signal levels and horizontal It is possible to simultaneously transmit a terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of more than 1920 pixels × 1080 vertical pixels.

The broadcast receiving device in each embodiment of the present invention may have a configuration capable of suitably receiving advanced digital broadcasting, and the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, and the third tuner / demodulation unit may be used. It is not essential to include all of the unit 130L and the fourth tuner / demodulation unit 130B. For example, at least one of a second tuner / demodulation unit 130T or a third tuner / demodulation unit 130L may be provided. Further, in order to realize more advanced functions, one or a plurality of the above four tuners / demodulation units may be provided in addition to one of the second tuner / demodulation unit 130T or the third tuner / demodulation unit 130L. good.

Further, the antenna 200C, the antenna 200T, and the antenna 200L may be used in combination as appropriate. Further, among the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, and the third tuner / demodulation unit 130L, a plurality of tuners / demodulation units may be appropriately used (or integrated).

The first decoder section 140S and the second decoder section 140U were output from the first tuner / demodulation section 130C, the second tuner / demodulation section 130T, the third tuner / demodulation section 130L, and the fourth tuner / demodulation section 130B, respectively. A packet stream or a packet stream acquired from each server device on the Internet 800 is input via the LAN communication unit 121. The packet streams input by the first decoder unit 140S and the second decoder unit 140U are MPEG (Moving Picture Experts Group) -2 TS (Transport Stream), MPEG-2 PS (Program Stream), TLV (Type Length Value), and TLV (Type Length Value). It may be a packet stream in a format such as (MPEG Media Transport).

Each of the first decoder unit 140S and the second decoder unit 140U receives video data, audio data, and various information data from the packet stream based on the conditional access (CA) processing and various control information included in the packet stream. Performs multiplex separation processing to separate and extract, etc., decoding processing of video data and audio data, acquisition of program information and EPG (Electronic Packet Guide: electronic program guide) generation processing, data broadcasting screen and multimedia data playback processing, etc. .. In addition, a process of superimposing the generated EPG and the reproduced multimedia data on the decoded video data and audio data is performed.

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

The audio selection unit 194 inputs 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, etc., based on the control of the main control unit 101. Is processed. 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 device 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 for outputting or inputting a packet stream including encoded digital video data and / or digital audio data. In the digital interface unit 125, the first decoder unit 140S and the second decoder unit 140U are transmitted from the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, and the fourth tuner / demodulation unit 130B. The input packet stream can be output as it is. Further, the packet stream input from the outside via the digital interface unit 125 may be input to the first decoder unit 140S or the second decoder unit 140U, or may be controlled to be stored in the storage (storage) unit 110. Alternatively, the video data or audio data separated and extracted by the first decoder unit 140S or the second decoder unit 140U may be output. Further, even if the video data or audio data input from the outside via the digital interface unit 125 is input to the first decoder unit 140S or the second decoder unit 140U, or is controlled to be stored in the storage (storage) unit 110. good.

The expansion interface unit 124 is a group of interfaces for expanding the functions of the broadcast receiving device 100, and is composed of 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 connects to a PC or the like to send and receive data. A HDD may be connected to record broadcast programs and other content data. You may also connect a keyboard or other USB device. The memory interface connects a memory card or other memory medium to send and receive data.

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

When the broadcast receiving device 100 is a television receiver or the like, the video output unit 193 and the audio output unit 196 are not indispensable configurations. Further, the broadcast receiving device 100 may be an optical disk drive recorder such as a DVD (Digital Versaille Disc) recorder, a magnetic disk drive recorder such as an HDD recorder, an STB (Set Top Box), or the like. It may be a PC (Personal Computer), a tablet terminal, or the like having a reception function of a digital broadcasting service. When the broadcast receiving device 100 is a DVD recorder, an HDD recorder, an STB, or the like, the monitor unit 192 and the speaker unit 195 are not indispensable configurations. 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 that of a television receiver or the like is possible.

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

The channel selection / detection unit 131C inputs the current digital broadcast wave received by the antenna 200C and selects a channel based on the channel selection control signal. The TMCC decoding unit 132C extracts the 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 process in the subsequent stage. Details of the TMCC signal and TMCC information will be described later.

The demodulation unit 133C uses QPSK (Quadrature Phase Shift Keying), DQPSK (Quadrature QPSK), 16QAM (Quadrature Amplitude Modulation), modulation using 64QAM, etc. based on TMCC information or the like. Performs demodulation processing including frequency deinterleaving, time deinterleaving, carrier demapping processing, and the like. The demodulation unit 133C may be capable of further supporting a modulation method different from each of the above-mentioned modulation methods.

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

FIG. 2C is a block diagram showing an example of a detailed configuration of the second tuner / demodulation unit 130T.

The channel selection / detection unit 131H inputs the horizontal (H) polarization 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 inputs the vertical (V) polarization signal of the digital broadcast wave received by the antenna 200T, and performs channel selection based on the channel selection control signal. The operation of the channel selection process in the channel selection / detection unit 131H and the operation of the channel selection process in the channel selection / detection unit 131V may be controlled in conjunction with each other, or may be controlled independently of each other. That is, one of the digital broadcasting services transmitted using both horizontal and vertical polarization, assuming that the channel selection / detection unit 131H and the channel selection / detection unit 131V are one channel selection / detection unit. It is also possible to control to select one channel, assuming that the channel selection / detection unit 131H and the channel selection / detection unit 131V are two independent channel selection / detection units, and only horizontally polarized light (or It is also possible to control to select two different channels of the digital broadcasting service transmitted by using (vertically polarized light only).

The horizontally (H) polarized signal and the vertically (V) polarized signal received by the second tuner / demodulator 130T of the broadcast receiving device in each embodiment of the present invention are based on broadcast waves whose polarization directions differ by approximately 90 degrees. Any polarized signal may be used, and the configurations relating to the horizontally (H) polarized signal, the vertically (V) polarized signal, and their reception described below may be reversed.

The TMCC decoding unit 132H extracts the TMCC signal from the output signal of the channel selection / detection unit 131H and acquires various TMCC information. The TMCC decoding unit 132V extracts the 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 used. The acquired TMCC information is used to control each process in the subsequent stage.

The demodulation unit 133H and the demodulation unit 133V are based on TMCC information and the like, respectively, based on BPSK (Binary Phase Shift Keying), DBPSK (Different BPSK), QPSK, DQPSK, 8PSK (Phase Shift Keying), and 8PSK (Phase Shift Keying). ), 32APSK, 16QAM, 64QAM, 256QAM, 1024QAM, and the like, the modulated wave modulated by the method is input, and demodulation processing including frequency deinterleaving, time deinterleaving, carrier demapping processing, and the like is performed. The demodulation unit 133H and the demodulation unit 133V may further support a modulation method different from each of the above-mentioned modulation methods.

The stream reproduction unit 134H and the stream reproduction unit 134V respectively have layer division processing, internal code error correction processing such as Viterbi decoding and LDPC (Low Density Parity Check) decoding, energy reverse diffusion processing, stream reproduction processing, RS decoding and BCH decoding. Etc., perform external code error correction processing, etc. As the error correction processing, a method different from each of the above-mentioned methods may be used. 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, an MPEG-2 TS, a TLV including an MMT packet stream, or the like. Each may be a packet stream of any other format.

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

The channel selection / detection unit 131L inputs a digital broadcast wave subjected to layered division multiplexing (LDM) processing from the antenna 200L, and selects a channel based on the channel selection control signal. The digital broadcast wave subjected to the layer division multiplexing is a digital broadcast service (or different of the same broadcast service) in which the modulated wave of the upper layer (Upper Layer: UL) and the modulated wave of the lower layer (Lower Layer: LL) are different. It may be used for transmission of a channel). Further, the modulated wave of the upper layer is output to the demodulation unit 133S, and the modulated wave of the lower layer is output to the demodulation unit 133L.

The TMCC decoding unit 132L inputs the modulated wave of the upper layer and the modulated wave of the lower layer 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 modulated wave of the upper layer and the modulated wave of the lower layer.

Since the demodulation unit 133S and the demodulation unit 133L perform the same operations as the demodulation unit 133H and the demodulation unit 133V, detailed description thereof will be omitted. Further, since the stream reproduction unit 134S and the stream reproduction unit 134L perform the same operations as the stream reproduction unit 134H and the stream reproduction unit 134V, respectively, detailed description thereof will be omitted.

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

The channel selection / detection unit 131B inputs the digital broadcast wave of the advanced BS digital broadcasting service or the advanced CS digital broadcasting service received by the antenna 200B, and selects a channel based on the channel selection control signal. Since other operations are the same as those of the channel selection / detection unit 131H and the channel selection / detection unit 131V, detailed description thereof will be omitted. Further, the TMCC decoding unit 132B, the demodulation unit 133B, and the stream reproduction unit 134B also perform the same operations as the TMCC decoding unit 132H, the TMCC decoding unit 132V, the demodulation unit 133H, the demodulation unit 133V, and the stream reproduction unit 134V, respectively. The explanation is omitted.

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

The selection unit 141S inputs from the packet stream input from the first tuner / demodulation unit 130C, the packet stream input from the second tuner / demodulation unit 130T, and the third tuner / demodulation unit 130L based on the control of the main control unit 101. Select one from the packet stream and output it. The packet stream input from the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, or the third tuner / demodulation unit 130L is, for example, MPEG-2 TS or the like. The CA descrambler 142S performs the decryption processing of a predetermined scrambled encryption algorithm based on various control information regarding the limited reception superimposed on the packet stream.

The multiplex separation unit 143S is a stream decoder, and separates and extracts video data, audio data, character super data, subtitle data, program information data, and the like based on various control information included 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 character super data, subtitle data, program information data and the like are distributed to the data decoder 144S. A packet stream (for example, MPEG-2 PS or the like) acquired from a server device on the Internet 800 may be input to the multiplexing separation unit 143S via the LAN communication unit 121. Further, the multiplex separation unit 143S may output the packet stream input from the first tuner / demodulation unit 130C, the second tuner / demodulation unit 130T, and the third tuner / demodulation unit 130L to the outside via the digital interface 125. It is possible, and it is possible to input a packet stream acquired from the outside via the digital interface 125.

The video decoder 145S performs compression-coded video information decoding processing, colorimetry conversion processing, dynamic range conversion processing, and the like on the decoded video information on the video data input from the multiplex separation unit 143S. In addition, processing such as resolution conversion (up / down conversion) based on the control of the main control unit 101 is performed, and UHD (horizontal 3840 pixels x vertical 2160 pixels), HD (horizontal 1920 pixels x vertical 1080 pixels), SD ( Video data is output at a resolution such as (horizontal 720 pixels x vertical 480 pixels). Video data may be output at other resolutions. The voice decoder 146S performs a compression-encoded voice information decoding process and the like. In addition, downmix processing or the like is performed based on the control of the main control unit 101, and audio data is output with the number of channels such as 22.2ch, 7.1ch, 5.1ch, and 2ch. A plurality of video decoders 145S and audio decoders 146S may be provided in order to simultaneously perform a plurality of video data and audio data decoding processes.

The data decoder 144S performs a process of generating an EPG based on program information data, a data broadcasting screen generation process based on BML data, a control process of a linked application based on a broadcast communication linking function, and the like. The data decoder 144S has a BML browser function for executing a BML document, and the data broadcasting screen generation process is executed by the BML browser function. Further, the data decoder 144S performs a process of decoding character super data to generate character super information, a process of decoding subtitle data to generate subtitle information, and the like.

The superimposition unit 147S, the superimposition unit 148S, and the superimposition unit 149S perform superimposition processing of the video data output from the video decoder 145S and the EPG or data broadcasting screen output from the data decoder 144S, respectively. The synthesis unit 151S performs a process of synthesizing the voice data output from the voice decoder 146S and the voice data reproduced by the data decoder 144S. The selection unit 150S selects the resolution of the video data based on the control of the main control unit 101. The functions of the superimposition unit 147S, the superimposition unit 148S, the superimposition unit 149S, and the selection unit 150S may be integrated with the image selection unit 191. The function of the synthesis unit 151S may be integrated with the voice selection unit 194.

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

The selection unit 141U inputs from the packet stream input from the second tuner / demodulation unit 130T, the packet stream input from the third tuner / demodulation unit 130L, and the fourth tuner / demodulation unit 130B based on the control of the main control unit 101. Select one from the packet stream and output it. The packet stream input from the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, or the fourth tuner / demodulation unit 130B is, for example, an MMT packet stream or a TLV including an MMT packet stream. It 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 a predetermined scramble type encryption algorithm decryption process based on various control information regarding the limited reception superimposed on the packet stream.

The multiplex separation unit 143U is a stream decoder, and separates and extracts video data, audio data, character super data, subtitle data, program information data, and the like based on various control information included 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 character super data, subtitle data, program information data, etc. are distributed to the multimedia decoder 144U. .. A packet stream (for example, MPEG-2 PS, MMT packet stream, etc.) acquired from a server device on the Internet 800 may be input to the multiplex separation unit 143U via the LAN communication unit 121. Further, the multiplex separation unit 143U may output the packet stream input from the second tuner / demodulation unit 130T, the third tuner / demodulation unit 130L, and the fourth tuner / demodulation unit 130B to the outside via the digital interface 125. It is possible, and it is possible to input a packet stream acquired from the outside via the digital interface 125.

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

The video decoder 145U, the audio decoder 146U, the superimposition unit 147U, the superimposition unit 148U, the superimposition unit 149U, the compositing unit 151U, and the selection unit 150U are the video decoder 145S, the audio decoder 146S, the superimposition unit 147S, the superimposition unit 148S, and the superimposition unit 149S, respectively. It is a component unit having the same function as the synthesis unit 151S and the selection unit 150S. In the description of the video decoder 145S, the audio decoder 146S, the superimposition unit 147S, the superimposition unit 148S, the superimposition unit 149S, the compositing unit 151S, and the selection unit 150S in FIG. Since the description of the video decoder 145U, the audio decoder 146U, the superimposition unit 147U, the superimposition unit 148U, the superimposition unit 149U, the synthesis unit 151U, and the selection unit 150U will be described in the above, a separate detailed description will be omitted.

[Software configuration of broadcast receiver]
FIG. 2H is a software configuration diagram of the broadcast receiving device 100, and shows an example of the software configuration in the storage (storage) unit 110 (or ROM 103, the same applies hereinafter) and the RAM 104. The storage (storage) unit 110 stores a basic operation program 1001, a reception function program 1002, a browser program 1003, a content management program 1004, and other operation programs 1009. Further, the storage (storage) unit 110 includes a content storage area 1011 for storing content data such as moving images, still images, and voices, authentication information used for communication and cooperation with an external mobile terminal device, server device, or the like. It is assumed that the authentication information storage area 1012 for storing the above information and various information storage areas 1019 for storing various other information are provided.

The basic operation program 1001 stored in the storage (storage) unit 110 is expanded in the RAM 104, and the main control unit 101 further executes the expanded basic operation program to form the basic operation control unit 1101. Further, the reception function program 1002, the browser program 1003, and the content management program 1004 stored in the storage (storage) unit 110 are each expanded in the RAM 104, and the main control unit 101 further executes each of the expanded operation programs. As a result, the reception function control unit 1102, the browser engine 1103, and the content management unit 1104 are configured. Further, the RAM 104 is provided with a temporary storage area 1200 that temporarily holds the data created at the time of executing each operation program as needed.

In the following, for the sake of simplicity, the main control unit 101 controls each operation block by expanding and executing the basic operation program 1001 stored in the storage (storage) unit 110 in the RAM 104. Is described as assuming that the basic operation control unit 1101 controls each operation block. The same description is made for other operation programs.

The reception function control unit 1102 performs basic control such as a broadcast reception function and a broadcast communication cooperation function of the broadcast reception device 100. In particular, the channel selection / demodulation unit 1102a is used for 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 and demodulation processing. The stream playback control unit 1102b includes layer division processing, error correction decoding processing, and energy 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 back diffusion processing and stream reproduction processing. The AV decoding unit 1102c mainly controls multiple separation processing (stream decoding processing), video data decoding processing, audio data decoding processing, and the like in the first decoder unit 140S, the second decoder unit 140H, and the like. The multimedia (MM) data reproduction unit 1102d includes BML data reproduction processing, character super data decoding processing, subtitle data decoding processing, communication cooperation application control processing in the first decoder unit 140S, and HTML data reproduction processing in the second decoder unit 140H. It mainly controls the multimedia screen generation process, the control process of the communication cooperation application, and so on. The EPG generation unit 1102e mainly controls the EPG generation processing and the display processing of the generated EPG in the first decoder unit 140S and the second decoder unit 140H. The presentation processing unit 1102f controls colorimetry conversion processing, dynamic range conversion processing, resolution conversion processing, audio downmix processing, etc. in the first decoder unit 140S and the second decoder unit 140H, and 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 the BML document and the HTML document at the time of the above-mentioned 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 has copyright for time schedule management and execution control when making recording reservations and viewing reservations for broadcast programs, and for outputting broadcast programs and recorded programs from digital I / F 125, LAN communication unit 121, and the like. It manages the expiration date of the linked application acquired based on the management and broadcast communication linkage function.

Each of the operation programs may be stored in the storage (storage) unit 110 and / or ROM 103 in advance at the time of product shipment. After the product is shipped, it may be acquired from the server device on the Internet 800 via the LAN communication unit 121 or the like. Further, each of the operation programs stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 124 or the like. It may be newly acquired or updated via a broadcast wave.

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

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

The storage unit 410 stores the basic operation program 4001, the content management / distribution program 4002, and the content transmission program 4003, and further includes a content data storage area 4011 and a metadata storage area 4012. The content data storage area 4011 stores the content data and the like of each broadcast program broadcast by the 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.

Further, the basic operation program 4001 and the content management / distribution program 4002 and the content transmission program 4003 stored in the storage unit 410 are each expanded in the RAM 404, and the main control unit 401 further expands the expanded basic operation program and the content management / By executing the distribution program and the content transmission program, the basic operation control unit 4101 and the content management / distribution control unit 4102 content transmission control unit 4103 are configured.

In the following, in order to simplify the explanation, the main control unit 401 controls each operation block by expanding and executing the basic operation program 4001 stored in the storage unit 410 in the RAM 404. It is described as assuming that the operation control unit 4101 controls each operation block. The same description is made for other operation programs.

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

The content transmission control unit 4103 includes the content data of the broadcast program stored in the content data storage area 4011, the program title of the broadcast program stored in the metadata storage area 4012, the program ID, the copy control information of the program content, and the like. It manages the time schedule 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 and other communication devices on the Internet 800. The LAN communication unit 421 includes a code 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 and program information data of each broadcast program stored in the content data storage area 4011, and digitally transmits the stream via the radio tower 300. Send as a broadcast wave.

[Service provider server configuration]
FIG. 3B is an example of the internal configuration of the service provider server 500. The service provider server 500 is composed of a main control unit 501, a system bus 502, a RAM 504, a storage unit 510, and a LAN communication unit 521.

The main control unit 501 is a microprocessor unit that controls the entire service provider server 500 according to a predetermined operation program. The system bus 502 is a communication path for transmitting and receiving various data, commands, and the like between the main control unit 501 and each operation block in the service provider server 500. The RAM 504 serves as a work area when each operation program is executed.

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

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

In the following, in order to simplify the explanation, the main control unit 501 controls each operation block by expanding and executing the basic operation program 5001 stored in the storage unit 510 in the RAM 504. It is described as assuming that the operation control unit 5101 controls each operation block. The same description is made for other operation programs.

The content management / distribution control unit 5102 acquires content data, metadata, etc. from the broadcasting station server 400, manages the content data, metadata, etc. stored in the content data storage area 5011 and the metadata storage area 5012, and each of them. It controls the distribution of the content data, metadata, etc. to the TV receiver. Further, the application management / distribution control unit 5103 manages each application stored in the application storage area 5013 and controls when the application is distributed in response to a request from each television receiver. Further, the application management / distribution control unit 5103 also performs authentication processing of the television receiver and the like, if 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 and other communication devices on the Internet 800. In addition, it communicates with the broadcast receiving device 100 and the mobile information terminal 700 via the router device 800R. The LAN communication unit 521 includes a code circuit, a decoding circuit, and the like.

[Broadcast wave of digital broadcasting]
Here, an example of a broadcast wave of digital broadcasting received by the broadcast receiving device of the embodiment of the present invention will be described.

The broadcast receiving device 100 can receive a terrestrial digital broadcasting service that shares at least a part of specifications with the ISDB-T (Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting) system. Specifically, the polarized terrestrial digital broadcasting that can be received by the second tuner / demodulation unit 130T is an advanced terrestrial digital broadcasting that shares some specifications with the ISDB-T system. Further, the layer-division multiplex terrestrial digital broadcasting that can be received by the third tuner / demodulation unit 130L is an advanced terrestrial digital broadcasting that shares some specifications with the ISDB-T system. The current terrestrial digital broadcasting that can be received by the first tuner / demodulation unit 130C is the ISDB-T system terrestrial digital broadcasting. Further, the advanced BS digital broadcasting and the advanced CS digital broadcasting that can be received by the fourth tuner / demodulation unit 130B are digital broadcasting different from the ISDB-T system.

Here, the polarization amphibious terrestrial digital broadcasting and the tier-divided multiplex terrestrial digital broadcasting according to the present embodiment are different from the ISDB-T system in that the transmission system is one of the multi-carrier systems, OFDM (Orthogonal Frequency Division Multiplexing: Orthogonal Frequency). Frequency division multiplexing) is adopted. Since OFDM is a multi-carrier system, the symbol length is long, and it is effective to add a redundant part in the time axis direction called a guard interval, and it is possible to reduce the influence of multipath within the guard interval range. Is. Therefore, SFN (Single Frequency Network: single frequency network) can be realized, and the frequency can be effectively used.

In the polarization amphibious terrestrial digital broadcasting and the hierarchical division multiplex terrestrial digital broadcasting according to the present embodiment, the OFDM carriers are divided into groups called segments as in the ISDB-T system, and as shown in FIG. 4A, digital. One channel bandwidth of a broadcasting service consists of 13 segments. The central part of the band is set as the position of segment 0, and segment numbers (0 to 12) are sequentially assigned above and below this position. The transmission line coding of the polarized terrestrial digital broadcasting and the layer division multiplex terrestrial digital broadcasting according to this embodiment is performed in units of OFDM segments. Therefore, it is possible to define layered transmission, for example, in the bandwidth of one television channel, some OFDM segments can be allocated to the fixed reception service and the rest to the mobile reception service. it can. In layered transmission, each layer is composed of one or a plurality of OFDM segments, and parameters such as a carrier modulation method, an internal code coding rate, and a time interleave length can be set for each layer. The number of layers may be set arbitrarily, for example, up to 3 layers may be set. FIG. 4B shows an example of hierarchical allocation of OFDM segments when the number of layers is 3 or 2. In the example of FIG. 4B (1), 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 5 segments (segments 1 to 7). It is composed of segments 8 to 12). In the example of FIG. 4B (2), 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 1 to 5). It is composed of segments 6 to 12). In the example of FIG. 4B (3), the number of layers is 2, the A layer is composed of one segment (segment 0), and the B layer is composed of 12 segments (segments 1 to 12). The number of OFDM segments and transmission path coding parameters of each layer are determined according to the organization information, and are transmitted by the TMCC signal which is the control information for assisting the operation of the receiver.

In addition, as an example of the use example of the segment hierarchy allocation of (1), (2), (3) of FIG. 4B, for example, the following example may be possible.

For example, the hierarchical allocation of FIG. 4B (1) can be used in the polarized terrestrial digital broadcasting according to the present embodiment, and the same segment hierarchical allocation may be used for both horizontally polarized waves and vertically polarized waves. Specifically, the current mobile reception service of terrestrial digital broadcasting may be transmitted in the above-mentioned one segment of horizontally polarized waves as layer A. (Note that the current mobile reception service for terrestrial digital broadcasting may transmit the same service in the above-mentioned one segment of vertically polarized waves. In this case, this is also treated as layer A.) Further, horizontal bias as layer B. A terrestrial digital broadcasting service that transmits an image having a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels, which is the current terrestrial digital broadcasting, may be transmitted in the above seven segments of the wave. (Note that the terrestrial digital broadcasting service that transmits a video having a maximum resolution of the horizontal 1920 pixels × vertical 1080 pixels may transmit the same service in the above 7 segments of vertically polarized light. In this case, this is also as the B layer. Furthermore, as the C layer, the above 5 segments of both horizontal polarization and vertical polarization, a total of 10 segments, can transmit images with a maximum resolution of more than 1920 pixels horizontally and 1080 pixels vertically. It may be configured to transmit a digital broadcasting service. The details of the transmission will be described later. The transmission wave of the segment layer allocation can be received by, for example, the second tuner / demodulation unit 130T of the broadcast receiving device 100.

For example, the hierarchical allocation of FIG. 4B (2) can be used as an example different from that of FIG. 4B (1) in the polarized terrestrial digital broadcasting according to the present embodiment, and the same segment for both horizontally polarized waves and vertically polarized waves. Hierarchical allocation may be used. Specifically, the current mobile reception service of terrestrial digital broadcasting may be transmitted in the above-mentioned one segment of horizontally polarized waves as layer A. (Note that the current mobile reception service for terrestrial digital broadcasting may transmit the same service in the above-mentioned one segment of vertically polarized waves. In this case, this is also treated as layer A.) Further, horizontal bias as layer B. It is configured to transmit an advanced terrestrial digital broadcasting service capable of transmitting video with a maximum resolution of more than 1920 horizontal pixels x 1080 vertical pixels in the above 5 segments of both wave and vertically polarized waves, for a total of 10 segments. You may. Further, as the C layer, a terrestrial digital broadcasting service for transmitting a video having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically, which is the current terrestrial digital broadcasting in the above 7 segments of horizontally polarized waves, may be transmitted. (Note that the terrestrial digital broadcasting service that transmits a video having a maximum resolution of the horizontal 1920 pixels × vertical 1080 pixels may transmit the same service in the above seven segments of vertically polarized light. In this case, this is also as the C layer. The details of the transmission will be described later. The transmission wave of the segment layer allocation can be received by, for example, the second tuner / demodulation unit 130T of the broadcast receiving device 100 of this embodiment.

For example, the layer allocation of FIG. 4B (3) can be used in the layer-division multiplex terrestrial digital broadcasting and the current terrestrial digital broadcasting according to the present embodiment. Specifically, when used in layer-division multiplex terrestrial digital broadcasting, the current mobile reception service of terrestrial digital broadcasting may be transmitted in one segment in the figure as layer A. Further, as the B layer, it may be configured to transmit an advanced terrestrial digital broadcasting service capable of transmitting an image having a maximum resolution of pixels exceeding 1920 horizontal pixels × 1080 vertical pixels in 12 segments in the figure. The transmission wave of the segment layer allocation can be received by, for example, the third tuner / demodulation unit 130L of the broadcast receiving device 100 of this embodiment. When used in the current terrestrial digital broadcasting, the mobile reception service of the current terrestrial digital broadcasting may be transmitted in one segment in the figure as the A layer, and the current terrestrial digital broadcasting in the 12 segments in the figure as the B layer. The terrestrial digital broadcasting service for transmitting a video having a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels may be transmitted. The transmission wave of the segment layer allocation can be received by, for example, the first tuner / demodulation unit 130C of the broadcast receiving device 100 of this embodiment.

FIG. 4C shows an example of a system on the broadcasting station side that realizes the generation processing of the OFDM transmission wave, which is the digital broadcasting wave of the polarization amphibious terrestrial digital broadcasting and the hierarchical division multiplex terrestrial digital broadcasting according to this embodiment. The information source coding unit 411 encodes video / audio / various data and the like. The multiplexing unit / limited reception processing unit 415 multiplexes the video / audio / various data encoded by the information source coding unit 411, further executes processing corresponding to the limited reception as appropriate, and outputs the packet stream. To do. A plurality of the information source coding unit 411 and the multiplexing unit / limited reception processing unit 415 can exist in parallel, and a plurality of packet streams are generated. The transmission line coding unit 416 remultiplexes the plurality of packet streams into one packet stream, performs transmission line coding processing, and outputs the output as an OFDM transmission wave. The configuration shown in FIG. 4C is the same as the ISDB-T system as a configuration for realizing the OFDM transmission wave generation process, although the details of the information source coding and transmission line coding methods are different. Therefore, of the plurality of information source coding units 411 and the multiplexing unit / limited reception processing unit 415, a part is configured for the ISDB-T system terrestrial digital broadcasting service, and a part is an advanced terrestrial digital broadcasting service. The packet streams of a plurality of different terrestrial digital broadcasting services may be multiplexed by the transmission path coding unit 416. When the multiplexing unit / limited reception processing unit 415 is configured for the ISDB-T system terrestrial digital broadcasting service, MPEG-2 TS, which is a TSP (Transport Stream Packet) stream defined by MPEG-2 Systems, is used. Just generate it. When the multiplexing unit / limited reception processing unit 415 is configured for an advanced terrestrial digital broadcasting service, an MMT packet stream, a TLV stream including an MMT packet, or a TSP stream specified by another system may be used. Just generate it. Naturally, all of the plurality of information source coding units 411 and the multiplexing unit / limited reception processing unit 415 are configured for advanced terrestrial digital broadcasting services, and all packet streams multiplexed by the transmission line coding unit 416 are advanced. It may be a packet stream for various terrestrial digital broadcasting services.

FIG. 4D shows an example of the configuration of the transmission line coding unit 416.

First, FIG. 4D (1) will be described. FIG. 4D (1) shows the configuration of the transmission line coding unit 416 when only the OFDM transmission wave of the digital broadcasting of the current terrestrial digital broadcasting service is generated. The OFDM transmission wave transmitted in this configuration has, for example, the segment configuration shown in FIG. 4B (3). The packet stream input from the multiplexing unit / limited reception processing unit 415 and subjected to remultiplexing processing adds redundancy for error correction, and also has various types such as byte interleaving, bit interleaving, time interleaving, and frequency interleaving. Interleave processing is performed. After that, processing by IFFT (Inverse Fast Fourier Transform) is performed together with the pilot signal, TMCC signal, and AC signal, and after a guard interval is added, it becomes an OFDM transmission wave through quadrature modulation. The external code processing, power diffusion processing, byte interleaving, internal code processing, and mapping processing are configured so that they can be processed separately for each layer such as the A layer and the B layer. (Note that the current digital broadcasting of the terrestrial digital broadcasting service has two layers in operation, but since transmission is possible up to three layers, FIG. 4D (1) shows an example of three layers.) The mapping process is a carrier. Modulation process. Further, in the packet stream input from the multiplexing unit / limited reception processing unit 415, information such as TMCC information and a mode and a guard interval ratio may be multiplexed. As described above, the packet stream input to the transmission line coding unit 416 may be a TSP stream defined by MPEG-2 Systems. The OFDM transmission wave generated by the configuration of FIG. 4D (1) can be received by, for example, the first tuner / demodulation unit 130C of the broadcast receiving device 100 of this embodiment.

Next, FIG. 4D (2) will be described. FIG. 4D (2) shows the configuration of the transmission line coding unit 416 when generating the OFDM transmission wave of the polarized terrestrial digital broadcasting according to the present embodiment. The OFDM transmission wave transmitted in this configuration has, for example, the segment configuration of FIG. 4B (1) or (2). Also in FIG. 4D (2), the packet stream input from the multiplexing unit / limited reception processing unit 415 and subjected to the remultiplexing process is added with error correction redundancy, and also has byte interleaving, bit interleaving, and time. Various interleaving processes such as interleaving and frequency interleaving are performed. After that, processing by IFFT is performed together with the pilot signal, TMCC signal, and AC signal, and after guard interval addition processing, quadrature modulation is performed to obtain an OFDM transmission wave.

In the configuration example of FIG. 4D (2), external code processing, power diffusion processing, byte interleaving, internal code processing, mapping processing, and time interleaving are processed separately for each layer such as layer A, layer B, and layer C. Configure as possible. However, in the configuration example of FIG. 4D (2), not only the horizontally polarized (H) OFDM transmission wave but also the vertically polarized (V) OFDM transmission wave is generated, and the processing flow is branched into two systems. To do. When branching from a horizontally polarized (H) processing system to a vertically polarized (V) processing system, the same data as the horizontally polarized (H) processing system is branched to the vertically polarized (V) processing system. Whether to branch the data different from the horizontally polarized light (H) processing system to the vertically polarized light (V) processing system or not to branch the data to the vertically polarized light (V) processing system is shown in FIG. 4B ( Corresponding to the segment configuration described in 1) or (2), it can be made different for each layer.

The processing of the external code, the internal code, the mapping, etc. shown in the configuration of FIG. 4D (2) is, in addition to the processing compatible with the configuration of FIG. 4D (1), in each processing of the configuration of FIG. 4D (1). More advanced processing that is not adopted can be used. Specifically, for the portion of the configuration shown in FIG. 4D (2) in which processing is performed for each layer, the current mobile reception service for terrestrial digital broadcasting and an image having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically are displayed. In the layer in which the current terrestrial digital broadcasting service to be transmitted is transmitted, processing such as an external code, an internal code, and mapping is performed that is compatible with the configuration of FIG. 4D (1). On the other hand, in the configuration of FIG. 4D (2), for the portion where processing is performed for each layer, advanced terrestrial digital broadcasting capable of transmitting a video having a maximum resolution of more than 1920 pixels horizontally and 1080 pixels vertically. Regarding the layer for transmitting the service, the processing such as the external code, the internal code, and the mapping may be configured to use more advanced processing that is not adopted in each processing of the configuration of FIG. 4D (1).

In the polarized terrestrial digital broadcasting according to the present embodiment according to the present embodiment, the allocation of the terrestrial digital broadcasting service to be transmitted can be switched between the layers according to the TMCC information described later. It is desirable that the processing such as the external code, the internal code, and the mapping to be performed can be switched by the TMCC information.

Regarding the layer for transmitting advanced terrestrial digital broadcasting services capable of transmitting video with a maximum resolution of more than 1920 pixels horizontally and 1080 pixels vertically, byte interleaving, bit interleaving, and time interleaving are the current terrestrial digital broadcasting. You may perform processing that is compatible with the service, or you may perform more advanced and different processing. Alternatively, some interleaving may be omitted for the layer that transmits advanced terrestrial digital broadcasting services.

Further, in the configuration of FIG. 4D (2), the layer in which the current mobile reception service for terrestrial digital broadcasting and the current terrestrial digital broadcasting service for transmitting an image having a maximum resolution of 1920 horizontal pixels × 1080 vertical pixels are transmitted. The source input stream may be a TSP stream specified 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 terrestrial digital broadcasting service configured in FIG. 4D (2) is a TLV that includes an MMT packet stream or an MMT packet among the packet streams input to the transmission path coding unit 416. It may be a stream specified by a system other than the TSP stream specified by MPEG-2 Systems. However, the TSP stream specified by MPEG-2 Systems may be adopted in the advanced terrestrial digital broadcasting service.

In the configuration of FIG. 4D (2) described above, the current mobile reception service for terrestrial digital broadcasting and video having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically are transmitted until an OFDM transmission wave is generated from the input stream. In the layer where the current terrestrial digital broadcasting service is transmitted, the stream format and processing compatible with the current terrestrial digital broadcasting are maintained. As a result, one of the horizontally polarized OFDM transmission wave and the vertically polarized OFDM transmission wave generated by the configuration of FIG. 4D (2) is received by the receiving device of the existing existing terrestrial digital broadcasting service. In the case of the current terrestrial digital broadcasting mobile reception service and the layer in which the current terrestrial digital broadcasting service that transmits images having a maximum resolution of 1920 pixels horizontal × 1080 pixels vertical is transmitted, the broadcasting of the terrestrial digital broadcasting service The signal can be received and demodulated correctly.

Further, in the configuration of FIG. 4D (2), in the hierarchy using both the horizontally polarized OFDM transmission wave and the vertically polarized OFDM transmission wave, the maximum resolution is the number of pixels exceeding 1920 horizontal pixels × 1080 vertical pixels. It is possible to transmit an advanced terrestrial digital broadcasting service capable of transmitting the above-mentioned video, and the broadcasting signal of the advanced terrestrial digital broadcasting service can be received and demodulated by the broadcasting receiving device 100 according to the embodiment of the present invention. It becomes.

That is, in the configuration of FIG. 4D (2), digital broadcasting can be suitably received and demodulated in both the broadcasting receiving device corresponding to the advanced terrestrial digital broadcasting service and the existing receiving device of the existing terrestrial digital broadcasting service. Broadcast waves can be generated.

Next, FIG. 4D (3) will be described. FIG. 4D (3) shows the configuration of the transmission line coding unit 416 when generating the OFDM transmission wave of the layer-division multiplex terrestrial digital broadcasting according to the present embodiment. Also in FIG. 4D (3), the packet stream input from the multiplexing unit / limited reception processing unit 415 and subjected to the remultiplexing process is added with error correction redundancy, and also has byte interleaving, bit interleaving, and time. Various interleaving processes such as interleaving and frequency interleaving are performed. After that, processing by IFFT is performed together with the pilot signal, TMCC signal, and AC signal, and after a guard interval is added, it becomes an OFDM transmission wave through quadrature modulation.

However, in the configuration of FIG. 4D (3), a modulated wave transmitted in the upper layer and a modulated wave transmitted in the lower layer are generated, and after multiplexing, an OFDM transmission wave which is a digital broadcast wave is generated. The processing system shown on the upper side of the configuration of FIG. 4D (3) is a processing system for generating a modulated wave transmitted in the upper layer, and the processing system shown on the lower side generates a modulated wave transmitted in the lower layer. It is a processing system for doing. The maximum resolution of the data transmitted by the processing system for generating the modulated wave transmitted in the upper layer of FIG. 4D (3) is the current mobile reception service of terrestrial digital broadcasting and horizontal 1920 pixels x vertical 1080 pixels. It is a current terrestrial digital broadcasting service that transmits video, and the various processes in the processing system for generating the modulated wave transmitted in the upper layer of FIG. 4D (3) are the same as the various processes of FIG. 4D (1) or It is a compatible process. The modulated wave transmitted in the upper layer of FIG. 4D (3) has, for example, the segment configuration of FIG. 4B (3) similar to the transmission wave of FIG. 4D (1). Therefore, the modulated wave transmitted in the upper layer of FIG. 4D (3) is the current mobile reception service for terrestrial digital broadcasting and the current terrestrial digital broadcasting service for transmitting images having a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically. It is a digital broadcasting wave compatible with. On the other hand, the data transmitted through the processing system for generating the modulated wave transmitted in the lower layer of FIG. 4D (3) is an image having a maximum resolution of the number of pixels exceeding 1920 horizontal pixels × 1080 vertical pixels. It is an advanced terrestrial digital broadcasting service capable of transmission. For example, for processing of external code, internal code, mapping, etc., it is configured to use more advanced processing that is not adopted in each processing of the configuration of FIG. 4D (1). Just do it.

The modulated wave transmitted in the lower layer of FIG. 4D (3) is, for example, an advanced terrestrial capable of transmitting an image having a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels with all 13 segments as layer A. It may be assigned to a digital broadcasting service. Alternatively, the segment configuration shown in FIG. 4B (3) is used to transmit the current mobile reception service of terrestrial digital broadcasting in the A layer of 1 segment, and pixels exceeding 1920 pixels horizontally × 1080 pixels vertically in the B layer of 12 segments. An advanced terrestrial digital broadcasting service capable of transmitting a video having a maximum resolution of a number may be transmitted. In the latter case, as in FIG. 4D (2), it may be configured so that the processing can be switched for each layer such as the A layer and the B layer from the external code processing to the time interleaving processing. Similar to the description in FIG. 4D (2), it is necessary to maintain processing compatible with the current terrestrial digital broadcasting in the layer for transmitting the mobile reception service of the current terrestrial digital broadcasting.

In the configuration of FIG. 4D (3), an OFDM transmission wave which is a terrestrial digital broadcasting wave in which a modulated wave transmitted in the upper layer and a modulated wave transmitted in the lower layer are multiplexed is generated. Since the technology for separating the modulated wave transmitted in the upper layer from the OFDM transmission wave is also installed in the existing receiver of the existing terrestrial digital broadcasting service, it is included in the modulated wave transmitted in the upper layer. The broadcast signal of the mobile reception service of terrestrial digital broadcasting and the current terrestrial digital broadcasting service that transmits images with a maximum resolution of 1920 pixels horizontally and 1080 pixels vertically is correctly used by the existing receiver of the current terrestrial digital broadcasting service. Received and demolished. On the other hand, the broadcast signal of the advanced terrestrial digital broadcasting service capable of transmitting a video having a maximum resolution of more than 1920 horizontal pixels × 1080 vertical pixels included in the modulated wave transmitted in the lower layer is the present. The broadcast receiving device 100 according to the embodiment of the present invention can receive and demodulate.

That is, in the configuration of FIG. 4D (3), digital broadcasting can be suitably received and demodulated in both the broadcasting receiving device corresponding to the advanced terrestrial digital broadcasting service and the existing receiving device of the existing terrestrial digital broadcasting service. Broadcast waves can be generated. Further, unlike the configuration of FIG. 4D (2), the configuration of FIG. 4D (3) does not need to use a plurality of polarized waves, and can more easily generate an OFDM transmission wave that can be received.

In the OFDM transmission wave generation processing according to FIGS. 4D (1), 4D (2), and 4D (3) of this embodiment, the SFN is compatible with the inter-station distance and is resistant to Doppler shift in mobile reception. In consideration of such factors, prepare three types of modes with different numbers of carriers. In addition, another mode with a different number of carriers may be further prepared. In a mode with a large number of carriers, the effective symbol length becomes longer, and if the guard interval ratio (guard interval length / effective symbol length) is the same, the guard interval length becomes longer, and it is possible to have resistance to multipath with a long delay time difference. Is. On the other hand, in the mode in which the number of carriers is small, the carrier interval becomes wide, and it is possible to reduce the influence of inter-carrier interference due to the Doppler shift that occurs in the case of mobile reception or the like.

In the OFDM transmission wave generation processing according to FIGS. 4D (1), 4D (2), and 4D (3) of this embodiment, the carrier modulation method is used for each layer composed of one or a plurality of OFDM segments. Parameters such as the code coding rate and the time interleave length can be set. FIG. 4E shows an example of transmission parameters for each segment of the OFDM segment identified in the mode of the system according to this embodiment. 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 adopt a modulation method different from the modulation method of the "data" carrier. Since these signals are signals whose resistance to noise is more important than the amount of information, they are constellations with a small number of states (BPSK or BPSK or more) than the modulation method of the "data" carrier (all are QPSK or more, that is, 4 states or more). A modulation method that maps to DBPSK, that is, two states) is adopted to improve noise immunity.

Further, each numerical value of the number of carriers is a value when QPSK, 16QAM, 64QAM, etc. are set as the carrier modulation method on the left side of the diagonal line, and a value when DQPSK is set as the carrier modulation method on the right side of the diagonal line. The value. In the figure, the underlined parameters are incompatible with the current mobile reception service for terrestrial digital broadcasting. Specifically, 256QAM, 1024QAM, and 4096QAM, which are modulation methods of "data" carriers, are not adopted in the current terrestrial digital broadcasting service. 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 FIGS. 4D (1), 4D (2), and 4D (3) of this embodiment, The 256QAM, 1024QAM, and 4096QAM of the "data" carrier modulation method are not used. For "data" carriers transmitted in layers corresponding to advanced terrestrial digital broadcasting services, QPSK (number of states 4), 16QAM (number of states 16), 64QAM (states) compatible with current terrestrial digital broadcasting services In addition to the modulation method such as the number 64), a more multi-level modulation method such as 256QAM (number of states 256), 1024QAM (number of states 1024) or 4096QAM (number of states 4096) may be applied. Further, a modulation method different from these modulation methods may be adopted.

As the modulation method of the pilot symbol (SP or CP) carrier, BPSK (number of states 2) compatible with the current terrestrial digital broadcasting service may be used. As the modulation method of the AC carrier and the TMCC carrier, DBPSK (number of states 2) compatible with the current terrestrial digital broadcasting service may be used.

Further, as a method of internal code processing, the LDPC code is not adopted in the current terrestrial digital broadcasting service. Therefore, in the processing in the hierarchy requiring compatibility with the current terrestrial digital broadcasting service in the OFDM broadcast wave generation processing according to FIGS. 4D (1), 4D (2), and 4D (3) of this embodiment, The LDPC code is not used. The LDPC code may be applied as the internal code to the data transmitted in the layer corresponding to the advanced terrestrial digital broadcasting service. Further, as a method of external code processing, BCH code is not adopted in the current terrestrial digital broadcasting service. 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 FIGS. 4D (1), 4D (2), and 4D (3) of this embodiment, No BCH code is used. A BCH code may be applied as an external code to data transmitted in a layer corresponding to an advanced terrestrial digital broadcasting service.

Further, FIG. 4F shows the transmission signal parameters for each physical channel (6 MHz bandwidth) of the OFDM broadcast wave generation processing according to FIGS. 4D (1), 4D (2), and 4D (3) of this embodiment. An example is shown. In the OFDM broadcast wave generation processing according to FIGS. 4D (1), 4D (2), and 4D (3) of this embodiment, basically, for compatibility with the current terrestrial digital broadcasting service, As a general rule, the parameters shown in FIG. 4F are compatible with the current terrestrial digital broadcasting service. However, when all segments are assigned to advanced terrestrial digital broadcasting services in the modulated wave transmitted in the lower layer of FIG. 4D (3), it is necessary to maintain compatibility with the current terrestrial digital broadcasting service in the modulated waves. Absent. Therefore, in this case, parameters other than the parameters shown in FIG. 4F may be used for the modulated wave transmitted in the lower layer of FIG. 4D (3).

Next, the carrier of the OFDM transmission wave according to this embodiment will be described. The carriers of the OFDM transmission wave according to this embodiment include carriers to which data such as video and audio are transmitted, carriers to which pilot signals (SP, CP, AC1, AC2) as a reference for demodulation are transmitted, and carriers. Some carriers transmit TMCC signals, which are information such as carrier modulation formats and convolutional coding rates. For these transmissions, a number of carriers corresponding to 1/9 of the number of carriers for each segment is used. In addition, a concatenated code is used for error correction, a shortened Reed-Solomon (204,188) code is used for the outer code, a constraint length of 7 is used for the inner code, and a coding rate of 1/2 is the mother code. Adopt a convolutional code. Coding different from the above may be used for both the outer code and the inner code. The information rate differs depending on parameters such as the carrier modulation format, the convolution code rate, and the guard interval ratio.

Further, 204 symbols are set as one frame, and an integer number of TSPs are included in one frame. The transmission parameters are switched at the boundary of this frame.

Pilot signals that serve as reference for demodulation include SP (Scattered Pilot), CP (Continual Pilot), AC (Auxiliary Channel) 1, and AC2. FIG. 4G shows an example of an arrangement image in a segment such as a pilot signal in the case of synchronous modulation (QPSK, 16QAM, 64QAM, 256QAM, 1024QAM, 4096QAM, etc.). The SP is inserted into the 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, they can be used as a reference for synchronous demodulation. FIG. 4H shows an example of an arrangement image in a segment such as a pilot signal in the case of differential modulation (DQPSK or the like). CP is a continuous signal inserted at the left end of the differential modulation segment and is used for demodulation.

AC1 and AC2 carry information on the CP, and are used not only for the role of pilot signals but also for the transmission of information for broadcasters. It may be used to transmit other information.

The arrangement images shown in FIGS. 4G and 4H are examples in the case of mode 3, and the carrier numbers are 0 to 431, but in the case of mode 1 and mode 2, they are 0 to 107 or 0, respectively. To 215. Further, the carrier that transmits AC1, AC2, and TMCC may be predetermined for each segment. The carriers that transmit AC1, AC2, and TMCC are randomly arranged in the frequency direction in order to reduce the influence of the periodic dip of the transmission line 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 configuration and the transmission parameters of the OFDM segment. The TMCC signal is transmitted by a carrier for TMCC transmission specified in each segment. FIG. 5A shows an example of bit allocation of the TMCC carrier. The TMCC carrier is composed of 204 bits (B0 to B203). B0 is a demodulation reference signal for the TMCC symbol and has a predetermined amplitude and phase reference. B1 to B16 are synchronization signals and are composed of 16-bit words. Two types of synchronization signals, w0 and w1, are defined, and w0 and w1 are alternately transmitted for each frame. B17 to B19 are used to identify the segment type, and identify whether each segment is a differential modulation unit or a synchronous modulation unit. TMCC information is described in B20 to B121. B122 to B203 are parity bits.

The TMCC information of the OFDM transmission wave according to this embodiment is, for example, system identification, transmission parameter switching index, activation control signal (starting flag for emergency alarm broadcasting), current information, next information, frequency conversion processing identification, as an example. It may be configured to include information for assisting the demodulation and decoding operations of the receiver, such as physical channel number identification, main signal identification, 4K signal transmission layer identification, additional layer transmission identification, and the like. The current information shows the current hierarchical structure and transmission parameters, and the next information shows the hierarchical structure and transmission parameters after switching. The transmission parameters are switched on a frame-by-frame basis. FIG. 5B shows an example of bit allocation of TMCC information. Further, FIG. 5C shows an example of the configuration of the transmission parameter information included in the current information / next information. The connected transmission phase correction amount is control information used in the case of terrestrial digital audio broadcasting ISDB-TSB (ISDB for Terrestrial Sound Broadcasting) or the like having a common transmission method, and detailed description thereof will be omitted here.

FIG. 5D shows an example of bit allocation for system identification. Two bits are assigned to the system identification signal. In the case of the current terrestrial digital television broadcasting system, "00" is set. In the case of a terrestrial digital audio broadcasting system having a common transmission method, "01" is set. Further, in the case of an advanced terrestrial digital television broadcasting system such as polarized terrestrial digital broadcasting or layered multiplex terrestrial digital broadcasting according to the present embodiment, "10" is set. In the advanced terrestrial digital television broadcasting system, 2K broadcast programs (horizontal 1920 pixels x vertical 1080 pixels video broadcast programs and lower resolution video broadcasts are broadcast by broadcast wave transmission by polarization dual transmission method or layered multiplex method. It is possible to simultaneously transmit a program (which may include a program) and a 4K broadcast program (a broadcast program of a video having more than 1920 horizontal pixels × 1080 vertical pixels) within the same service.

The transmission parameter switching index is used to notify the receiver of the switching timing by counting down when switching the transmission parameter. This index is usually a value of "1111", and when the transmission parameter is switched, it is subtracted by 1 for each frame from 15 frames before the switching. The switching timing is set to the next frame synchronization in which "0000" is transmitted. The value of the index returns to "1111" after "0000". Any one or more of the transmission parameters included in the system identification of the TMCC information and the current information / next information shown in FIG. 5B, the frequency conversion processing identification, the main signal identification, the 4K signal transmission layer identification, the additional layer transmission identification, and the like. When switching, count down. The countdown is not performed when only the activation control signal of the TMCC information is switched.

The activation control signal (starting flag for emergency warning broadcasting) is set to "1" when activation control to the receiver is performed in the emergency warning broadcasting, and "0" when activation control is not performed. To do.

The partial reception flag for each current information / next information is set to "1" when the segment in the center of the transmission band is set to partial reception, and to "0" otherwise. When segment 0 is set for partial reception, that layer is defined as layer A. If the next information does not exist, the partial reception flag is set to "1".

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

For the setting of the coding rate, the length of the time interleave, etc., each parameter may be set 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 layer as a 4-bit numerical value. If there is no unused hierarchy or next information, "1111" is set. Since the settings such as the mode and the guard interval ratio are independently detected on the receiver side, it is not necessary to transmit the TMCC information.

FIG. 5F shows an example of bit allocation for frequency conversion processing identification. In the frequency conversion processing identification, the conversion unit 201T and the conversion unit 201L of FIG. 2A performed the frequency conversion processing (in the case of the polarization dual-purpose transmission method) and the frequency conversion amplification processing (in the case of the layer division multiplexing transmission method) described later. In that case, set "0". If frequency conversion processing or frequency conversion amplification processing has not been performed, set "1". This parameter is set to "1" when transmitted from a broadcasting station, for example, and when the conversion unit 201T or conversion unit 201L executes frequency conversion processing or frequency conversion amplification processing, the conversion unit 201T or conversion unit 201L It may be configured to rewrite to "0" in. In this way, when the second tuner / demodulation unit 130T or the third tuner / demodulation unit 130L of the broadcast receiving device 100 receives the signal and the frequency conversion process identification bit is “0”, the OFDM is concerned. It is possible to identify that the frequency conversion process or the like has been performed after the transmitted wave is transmitted from the broadcasting station.

In the polarized wave terrestrial digital broadcasting according to the present embodiment, the frequency conversion processing identification bit may be set or rewritten for each of the plurality of polarized waves. For example, if both of the plurality of polarized waves are not frequency-converted by the conversion unit 201T of FIG. 2A, the frequency conversion processing identification bit included in the OFDM transmission wave of both may be left as “1”. Further, if only one of a plurality of polarized waves is frequency-converted by the conversion unit 201T, the frequency conversion processing identification bit included in the OFDM transmission wave of the frequency-converted polarized wave is set to "0" in the conversion unit 201T. ]. Further, if both of the plurality of polarized waves are frequency-converted by the conversion unit 201T, the frequency conversion processing identification bit included in the OFDM transmission wave of both polarized waves whose frequencies have been converted is set to "0" in the conversion unit 201T. You can rewrite it. In this way, in the broadcast receiving device 100, it is possible to identify the presence or absence of frequency conversion for each of a plurality of polarized waves.

Since the frequency conversion processing identification bit is not defined in the current terrestrial digital broadcasting, it will be ignored by the terrestrial digital broadcasting receiving device already used by the user. However, the bit may be introduced into a new terrestrial digital broadcasting service that transmits a video having a maximum resolution of 1920 pixels horizontal × 1080 pixels vertical, which is an improvement of the current terrestrial digital broadcasting. In this case, the first tuner / demodulation unit 130C of the broadcast receiving device 100 according to the embodiment of the present invention may also be configured as the first tuner / demodulation unit corresponding to the new terrestrial digital broadcasting service.

As a modification, it is assumed that the conversion unit 201T and the conversion unit 201L of FIG. 2A perform frequency conversion processing and frequency conversion amplification processing on the OFDM transmission wave, and when the wave is transmitted from the broadcasting station. It may be set to "0" in advance. If the received broadcast wave is not an advanced terrestrial digital broadcasting service, this parameter may be configured to be set to "1".

FIG. 5G shows an example of bit allocation for physical channel number identification. The physical channel number identification is composed of a 6-bit code, and identifies the physical channel number (13 to 52 channels) of the received broadcast wave. If the broadcast wave to be received is not an advanced terrestrial digital broadcasting service, this parameter is set to "111111". The bit for identifying the physical channel number is not defined in the current terrestrial digital broadcasting, and in the receiving device of the current terrestrial digital broadcasting, the physical channel number of the broadcast wave specified by the broadcasting station is acquired from the TMCC signal, AC signal, etc. Couldn't. In the broadcast receiving device 100 according to the embodiment of the present invention, the received OFDM transmission wave has a physical channel number identification bit for the OFDM transmission wave without demodulating carriers other than the TMCC signal and the AC signal. The physical channel number set by the broadcasting station can be grasped. The physical channels 13ch to 52ch have a bandwidth of 6 MHz per channel and are pre-allocated to a frequency band of 470 to 710 MHz. Therefore, the fact that the broadcast receiving device 100 can grasp the physical channel number of the OFDM transmission wave based on the bit of the physical channel number identification means that the frequency band in which the OFDM transmission wave was transmitted in the air as a terrestrial digital broadcast wave can be grasped. It means that you can do it.

In the polarized terrestrial digital broadcasting according to the present embodiment, in the processing of generating the OFDM transmission wave on the broadcasting station side, the physical channel number is assigned to each of a plurality of polarized wave pairs in the bandwidth that originally constitutes one physical channel. The identification bits may be arranged and the same physical number may be assigned. Here, depending on the installation environment of the broadcast receiving device 100, the conversion unit 201T of FIG. 2A may convert only the frequency of one of the plurality of polarized waves. As a result, when the frequencies of the plurality of polarized light pairs received by the broadcast receiving device 100 are different from each other, the plurality of polarized light having different frequencies are originally paired. If it cannot be grasped in some way, the broadcast receiver will not be able to demolish advanced terrestrial digital broadcasting using both polarizations of polarized terrestrial digital broadcasting. Even in such a case, if the above-mentioned physical channel number identification bit is used, when transmission waves having the same physical channel number identification bit are present at a plurality of different frequencies in the broadcast receiving device 100, the broadcasting station side originally has the same value. It can be identified as a transmission wave transmitted as a polarization pair constituting one physical channel. This makes it possible to realize advanced demodulation of terrestrial digital broadcasting of polarized terrestrial digital broadcasting by using a plurality of transmission waves showing the same value.

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

When the transmitted OFDM transmission wave is a transmission wave of polarized terrestrial digital broadcasting, this parameter is set to "1" in the TMCC information of the transmission wave transmitted with the main polarization. Set to "0" in the TMCC information of the transmission wave transmitted with the secondary polarization. The transmission wave transmitted by the main polarization is the polarization direction of the vertically polarization signal and the horizontally polarization signal, which is the same as the polarization direction used for the transmission of the current terrestrial digital broadcasting service. Refers to the polarization signal. That is, in areas where horizontal polarization transmission is adopted in the current terrestrial digital broadcasting service, in the polarized terrestrial digital broadcasting service, the horizontal polarization is the main polarization and the vertical polarization is the secondary polarization. It becomes a wave. In areas where vertical polarization transmission is adopted in the current terrestrial digital broadcasting service, vertical polarization is the main polarization in the polarization dual-purpose terrestrial digital broadcasting service, and horizontal polarization is the secondary polarization. It becomes.

In the broadcast receiving device 100 that has received the transmission wave of the polarized terrestrial digital broadcast according to the embodiment of the present invention, the received transmission wave is transmitted in the main polarization at the time of transmission by using the main signal identification bit. It is possible to identify whether the transmission was performed or was transmitted with a secondary polarization. For example, if the identification process of the main polarization and the sub-polarization is used, the transmission wave transmitted in the main polarization is first subjected to the initial scan at the time of the initial scan described later, and the transmission wave is transmitted in the main polarization. After the completion of the initial scan of the transmitted wave, it is possible to perform processing such as performing the initial scan of the transmitted wave transmitted with the secondary polarization.

The details of the configuration example of the digital terrestrial broadcasting service for transmission with the layer and the segment of the polarization terrestrial digital broadcasting according to this embodiment will be described later, but the current terrestrial broadcasting using the layer composed of the segment included only in the main polarization is used. When transmitting a digital broadcasting service and transmitting an advanced terrestrial digital service in a layer containing segments included in both the main polarization and the secondary polarization, the initial scan of the transmission wave transmitted in the main polarization first. And then complete the initial scan of the current terrestrial digital broadcasting service, and then perform the initial scan of the transmission wave transmitted with the secondary polarization to perform the initial scan of the advanced terrestrial digital broadcasting service. Is also good. In this way, the initial scan of the advanced terrestrial digital broadcasting service can be performed after the initial scan of the current terrestrial digital broadcasting service is completed, and the setting by the initial scan of the current terrestrial digital broadcasting service can be set by the advanced terrestrial digital broadcasting. It is preferable because it can be reflected in the setting by the initial scan of the broadcasting service.
The definition of the meanings of the main signal identification bits "1" and "0" may be the reverse of the above description.

Further, instead of the main signal identification bit, the polarization direction identification bit may be used as one parameter of the TMCC information. Specifically, the polarization direction identification bit is set to "1" on the broadcasting station side for the transmission wave transmitted by horizontally polarized waves, and the polarization direction identification bit is set on the broadcasting station side for the transmission wave transmitted by vertically polarized waves. It should be "0". In the broadcast receiving device 100 that has received the transmission wave of the polarized terrestrial digital broadcast according to the embodiment of the present invention, by using the polarization direction identification bit, the received transmission wave can be transmitted in any polarization direction. It is possible to identify whether it was transmitted by. For example, if the polarization direction identification process is used, the transmission wave transmitted in the horizontally polarized wave is first scanned in the initial scan described later, and the initial scan of the transmitted wave transmitted in the horizontally polarized wave is performed first. After the end of, processing such as initial scanning of the transmitted wave transmitted with vertically polarized waves becomes possible. In the explanation of the effect of the processing, the "main polarization" in the part related to the initial scan in the above explanation of the main signal identification bit is read as "horizontal polarization", and the "secondary polarization" is referred to as "vertical polarization". Since it may be read as a replacement, the description will be omitted again.

The definition of the meanings of the polarization direction identification bits "1" and "0" may be the reverse of the above description.

Further, instead of the above-mentioned 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 horizontally polarized light and the vertically polarized light is defined as the first polarized light, and the broadcast signal of the transmission wave transmitted by the first polarized light is defined as the first signal and broadcast. The first signal and the second signal identification bit may be set to "1" on the station side. Further, the other polarization is defined as the second polarization, the broadcast signal of the transmission wave transmitted by the second polarization is defined as the second signal, and the broadcasting station side sets the first signal and the second signal identification bit. It should be "0". In the broadcast receiving device 100 that has received the transmission wave of the polarized terrestrial digital broadcast according to the embodiment of the present invention, by using the first signal and the second signal identification bit, any of the received transmission waves can be transmitted at the time of transmission. It is possible to identify whether the transmission was carried out in the polarization direction. The first signal and the second signal identification bit have the concepts of "main polarization" and "secondary polarization" from the above definition of the main signal identification bit as "first polarization" and "second polarization". Only "polarization" is replaced, and the processing and effect in the broadcast receiving device 100 is that the "main polarization" of the part related to the processing of the broadcasting receiving device 100 in the above description of the main signal identification bit is changed to "first polarization". Since it may be read as "wave" and "secondary polarized light" as "second polarized light", the description will be omitted again.

The definition of the meanings of "1" and "0" of the first signal and the second signal identification bit may be the reverse of the above description.

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

In the layer-divided multiplex terrestrial digital broadcasting according to the present embodiment, here, in the generation processing of the OFDM transmission wave on the broadcasting station side, a plurality of modulations originally transmitted in the upper layer and the lower layer of one physical channel. For the lower layer of the wave, frequency conversion and signal amplification may be performed by the conversion unit 201L of FIG. 2A depending on the installation environment of the broadcast receiving device 100. When the broadcast receiving device 100 receives the transmission wave of the layer-division multiplex terrestrial digital broadcasting, it may be the modulated wave originally transmitted in the upper layer based on the above-mentioned upper and lower layer identification bits, or the lower layer. It is possible to identify whether the wave was the modulated wave transmitted in. For example, by the identification process, the initial scan of the advanced terrestrial digital broadcasting service transmitted in the lower layer can be performed after the initial scan of the current terrestrial digital broadcasting service transmitted in the upper layer is completed, and the current terrestrial broadcasting service can be performed. It is possible to reflect the settings made by the initial scan of the digital broadcasting service in the settings made by the initial scanning of the advanced terrestrial digital broadcasting service. Further, in the third tuner / demodulation unit 130L of the broadcast receiving device 100, it can be used for switching the processing of the demodulation unit 133S and the demodulation unit 133L based on the identification result.

In the description of the polarization dual-purpose transmission method in each of the following examples, unless otherwise specified, an example in which horizontal polarization is the main polarization and vertical polarization is the sub-polarization will be described as an example. However, the relationship between the main and the sub may be reversed for the horizontally polarized wave and the vertically polarized wave.
FIG. 5I shows an example of bit allocation for 4K signal transmission layer identification.

When the broadcast wave to be transmitted is the transmission wave of the polarized terrestrial digital broadcasting service according to the present embodiment, the 4K signal transmission layer identification bit 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 B layer setting and the C layer setting. For example, in the B layer and the C layer, when the 4K signal transmission layer identification bit for each layer is "0", a 4K broadcast program using both the horizontally polarized signal and the vertically polarized signal in the layer. It suffices to indicate that the transmission is performed. In the B layer and the C layer, when the 4K signal transmission layer identification bit for each layer is "1", a 4K broadcast program using both the horizontally polarized signal and the vertically polarized signal is transmitted in the layer. You just have to show that there isn't. In this way, in the broadcast receiving device 100, the 4K signal transmission layer identification bit is used, and in the B layer and the C layer, both the horizontally polarized signal and the vertically polarized signal are used in each layer to perform 4K. It is possible to identify whether or not to transmit a broadcast program.

Further, when the broadcast wave to be transmitted is the broadcast wave of the layer-divided multiplex terrestrial digital broadcasting service of the present embodiment, whether or not the 4K signal transmission layer identification bit transmits a 4K broadcast program in the lower layer. Should be indicated. When B119 of this parameter is "0", the 4K broadcast program is transmitted in the lower layer. When B119 of this parameter is "1", the transmission of the 4K broadcast program is not performed in the lower layer. In this way, in the broadcast receiving device 100, it is possible to identify whether or not to transmit the 4K broadcast program in the lower layer by using the 4K signal transmission layer identification bit.

When this parameter is "0", it is possible to adopt a NUC (Non-Uniform Configuration) modulation method in addition to the basic modulation method shown in FIG. 5C as the carrier modulation mapping method. In this case, the current / next information of the transmission parameter additional information regarding the B layer / C layer can be transmitted using AC1 or the like.

Further, when the broadcast wave to be transmitted is not an advanced terrestrial digital broadcasting service, this parameter may be set to "1" respectively.

The definitions of the 4K signal transmission layer identification bits "0" and "1" described above may be reversed from the above description.

FIG. 5J shows an example of bit allocation for additional layer transmission identification. The additional layer transmission identification bit is virtual for each of the B layer and C layer of the transmission wave transmitted in the secondary polarization, in which the broadcast wave to be transmitted is the polarized terrestrial digital broadcasting service of the present embodiment. It may indicate whether or not it is used as a D layer or a virtual E layer.

For example, in the example of the figure, the bit arranged in B120 is a D-layer transmission identification bit, and when this parameter is "0", the B-layer transmitted by the secondary polarization is used as the virtual D-layer. To be precise, among the segments transmitted by the secondary polarization, the segment group having the same segment number as the segment belonging to the B layer transmitted by the main polarization is transmitted by the main polarization. It is treated as a D layer, which is a layer different from the B layer. When this parameter is "1", the B layer transmitted by the secondary polarization is not used as the virtual D layer, but is used as the B layer.

Further, for example, the bit arranged in B121 is an E layer transmission identification bit, and when this parameter is "0", the C layer transmitted by the secondary polarization is used as the virtual E layer. To be precise, among the segments transmitted by the secondary polarization, the segment group having the same segment number as the segment belonging to the C layer transmitted by the main polarization is transmitted by the main polarization. It is treated as an E layer, which is a layer different from the C layer. When this parameter is "1", 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 the broadcast receiving device 100, the D layer and the E layer transmitted with the secondary polarization using the additional layer transmission identification bit (D layer transmission identification bit and / or E layer transmission identification bit) 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. 5J, the current terrestrial digital broadcasting is limited to three layers, A layer, B layer, and C layer. It is possible to operate new hierarchies (D and E hierarchies in the example of FIG. 5J) beyond the number.

When this parameter is "0", the parameters such as the carrier modulation mapping method, the coding rate, and the length of the time interleave shown in FIG. 5C are set in the virtual D layer / virtual E layer and the B layer / C layer. It is possible to make them different. In this case, the current / next information of parameters such as the carrier modulation mapping method for the virtual D layer / virtual E layer, the convolutional code rate, and the length of the time interleave can be transmitted using AC information (for example, AC1). On the broadcast receiving device 100 side, parameters such as the carrier modulation mapping method, the convolutional code rate, and the length of the time interleave regarding the virtual D layer / virtual E layer can be grasped.

As a modification, when the additional layer transmission identification bit (D layer transmission identification bit and / or E layer transmission identification bit) is "0", the current information / next of the TMCC information transmitted in the secondary polarization is used. The transmission parameters of the B layer and / or the C layer of the information may be configured to be switched to the meanings of the transmission parameters of the virtual D layer and / or the virtual E layer. In this case, when the virtual D layer and / or the virtual E layer is used, the A layer, the B layer, and the C layer are used for the main polarization, and the transmission parameters of these layers are the TMCC transmitted in the main polarization. The current information / next information of the information may be transmitted. Further, in the sub-polarization, the A layer, the D layer, and the E layer are used, and the transmission parameters of these layers may be transmitted by the current information / next information of the TMCC information transmitted by the sub-polarization. Even in this case, parameters such as the carrier modulation mapping method, the convolutional code rate, and the length of the time interleave regarding the virtual D layer / virtual E layer can be grasped on the broadcast receiving device 100 side.

Further, when 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 but is a layer division multiplexing transmission method, this parameter is configured to be set to "1". Is also good.

The parameters for the additional layer transmission identification may be stored in both the TMCC information of the main polarization and the TMCC information of the sub-polarization, but if they are stored in at least the TMCC information of the sub-polarization, the above-mentioned All of the processes are feasible.

Further, the definitions of the additional layer transmission identification bits "0" and "1" described above may be reversed from the above description.

When the above-mentioned 4K signal transmission layer identification parameter indicates that the 4K broadcast program is transmitted in the B layer, the above-mentioned D layer transmission identification bit indicates that the B layer is used as the virtual D layer. However, the broadcast receiving device 100 may ignore the D-layer transmission identification bit. Similarly, when the 4K signal transmission layer identification parameter indicates that the 4K broadcast program is transmitted in 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 device 100 may be configured to ignore the E-layer transmission identification bit. By clarifying the priority order of the bits used for the determination process in this way, it is possible to prevent a conflict in the determination process in the broadcast receiving device 100.

Further, in the broadcast wave to be transmitted, the above-mentioned frequency conversion processing identification bit, physical channel number identification bit, main signal identification bit, 4K signal transmission identification bit, additional layer transmission identification bit, and the like are used for the above-mentioned system identification. In principle, all bits may be set to "1" when the parameter of is not "10". The parameter of system identification is not "10", but exceptionally due to some problem, the bit of frequency conversion processing identification, the bit of physical channel number identification, the bit of main signal identification, the bit of 4K signal transmission identification, and the bit of additional layer transmission identification Even if the bit is not "1", the broadcast receiving device 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 "code rate" bit shown in FIG. 5C, that is, the bit allocation of the code rate identification of error correction.

Here, in the current terrestrial digital broadcasting system of 2K broadcasting, an identification bit for transmitting a coding rate dedicated to the "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 broadcast mixed with the terrestrial digital broadcasting service of 2K broadcasting. And as already explained, the LDPC code can be used as the internal code in the advanced terrestrial digital broadcasting service of the 4K broadcasting.

Therefore, unlike the current 2K broadcasting terrestrial digital broadcasting system, the error correction coding rate identification bit according to the present embodiment shown in FIG. 5K is not a coding rate identification bit dedicated to the convolutional code, but an LDPC code. It is configured to correspond to.

Here, regardless of whether the internal code of the target terrestrial digital broadcasting service is a convolutional code or an LDPC code, the bits arranged in the common range are set as the identification bits for the coding rate transmission. Achieve bit savings. Further, even if the identification bits are the same, the coding rate setting should be set independently depending on whether the internal code of the target terrestrial digital broadcasting service is a convolutional code or an LDPC code. Therefore, as a digital broadcasting system, a group of choices of a coding rate suitable for each coding method can be adopted.

Specifically, in the example of FIG. 5K, when the identification bit is "000", the coding rate is 1/2 if the internal code is a convolutional code, and the coding rate is 2 if the internal code is an LDPC code. Indicates that it is / 3. When the identification bit is "001", it indicates that the coding rate is 2/3 if it is a convolutional code and 3/4 if the internal code is an LDPC code. When the identification bit is "010", it indicates that the coding rate is 3/4 if the internal code is a convolutional code and 5/6 if the internal code is an LDPC code. When the identification bit is "011", it indicates that the coding rate is 5/6 if the internal code is a convolutional code and 2/16 if the internal code is an LDPC code. When the identification bit is "100", it indicates that the coding rate is 7/8 if the internal code is a convolutional code and 6/16 if the internal code is an LDPC code. When the identification bit is "101", it indicates that it is undefined if the internal code is a convolutional code, and that the coding rate is 10/16 if the internal code is an LDPC code. When the identification bit is "110", it indicates that it is undefined if the internal code is a convolutional code, and that the coding rate is 14/16 if the internal code is an LDPC code. If there is no unused hierarchy or next information, "111" is set for this parameter.

The identification of whether the internal code of the target terrestrial digital broadcasting service is a convolutional code or an LDPC code is whether the terrestrial digital broadcasting service is a current terrestrial digital broadcasting service or an advanced terrestrial digital broadcasting service. You may identify using the result of identification. The identification may be performed using the identification bit described with reference to FIG. 5D or FIG. 5I. Here, when the target terrestrial digital broadcasting service is the current terrestrial digital broadcasting service, it is sufficient to identify that the internal code is a convolutional code. Further, when the target terrestrial digital broadcasting service is an advanced terrestrial digital broadcasting service, it is sufficient to identify that the internal code is an LDPC code.

Further, as another example of identification of whether the internal code of the target terrestrial digital broadcasting service is a convolutional code or an LDPC code, identification is performed based on the identification bit of the error correction method described later in FIG. 6I. You may.

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 corresponding to a plurality of internal coding methods, which is preferable.

Further, in the advanced terrestrial digital broadcasting service of the polarization amphibious transmission system, the TMCC information of the transmission wave transmitted in the horizontally polarized light and the TMCC information of the transmission wave transmitted in the vertically polarized light may be the same. However, they may be different. Similarly, in the advanced terrestrial digital broadcasting service of the layer division multiplexing transmission system, the TMCC information of the transmission wave transmitted in the upper layer and the TMCC information of the transmission wave transmitted in the lower layer may be the same. However, they may be different. Further, the above-mentioned frequency conversion processing identification parameter, main signal identification parameter, additional layer transmission identification, etc. 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. May be done.

In the above description, the frequency conversion process identification parameter, the main signal identification parameter, the polarization direction identification parameter, the first signal second signal identification parameter, the upper and lower layer identification parameter, and the 4K signal transmission layer identification parameter , An example in which the parameter of the additional layer transmission identification is included in the TMCC signal (TMCC carrier) and transmitted is described. However, these parameters may be included in the AC signal (AC carrier) and transmitted. That is, these parameters may be transmitted by the signal of a carrier (TMCC carrier, AC carrier, etc.) modulated by a modulation method that performs mapping with a smaller number of states than the modulation method of the data carrier.

[AC signal]
The AC signal is an additional information signal related to broadcasting, and is additional information related to transmission control of a modulated wave, seismic motion warning information, and the like. The seismic motion warning information is transmitted using the AC carrier of segment 0. On the other hand, additional information regarding the transmission control of the modulated wave can be transmitted using any AC carrier. FIG. 6A shows an example of bit allocation of the AC signal. The AC signal is composed of 204 bits (B0 to B203). B0 is a demodulation reference signal for the AC symbol 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 regarding transmission control of modulated waves or transmission of seismic motion warning information.

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

The AC signals B4 to B203 are used for transmission of additional information regarding transmission control of the modulated wave or transmission of seismic motion warning information.

The transmission of additional information regarding the transmission control of the modulated wave may be performed by various bit configurations. For example, the frequency conversion processing 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 can be performed in place of the TMCC signal or in addition to the TMCC signal. Bits may be assigned to additional information related to transmission control of the modulated wave of the signal for transmission. In this way, in the broadcast receiving device 100, various identification processes already described in the description of the TMCC signal can be performed using these parameters. Further, the transmission parameter additional information regarding the transmission layer of the 4K broadcast program when any parameter of the 4K signal transmission layer identification is "0", or the virtual D when any parameter of the additional layer transmission identification is "0". The current / next information of the transmission parameter related to the layer / virtual E layer may be assigned. In this way, in the broadcast receiving device 100, the transmission parameters of each layer can be acquired by using these parameters, and the demodulation process of each layer can be controlled.

The transmission of the seismic motion warning information may be performed by the bit allocation shown in FIG. 6C. The seismic motion warning information is composed of a synchronization signal, a start / end flag, an update flag, signal identification, seismic motion warning detailed information, CRC, a parity bit, and the like. The synchronization signal is composed of a 13-bit code, and has the same code as the 13 bits (B4 to B16) excluding the first 3 bits of the synchronization signal of the TMCC signal. When the configuration identification of the AC signal indicates that the seismic motion warning information is transmitted, the 16-bit code that combines 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 start timing / end timing flag of the seismic motion warning information. The start / end flag is changed from "11" to "00" at the start of sending the seismic motion warning information, and from "00" to "11" at the end of sending the seismic motion warning information. The update flag is composed of a 2-bit code, and each time the content of a series of seismic motion warning detailed information transmitted when the start / end flag is "00" is changed, "00" is set as the initial value and "1". 』Increase by each. After "11", it shall return to "00". When the start / end flag is "11", the update flag is also "11".

FIG. 6D shows an example of bit allocation for signal identification. The signal identification is composed of a 3-bit code and is used to identify the type of seismic motion warning detailed information. When this parameter is "000", it means "detailed information on earthquake motion warning (with applicable area)". When this parameter is "001", it means "detailed information on seismic motion warning (no applicable area)". When this parameter is "010", it means "test signal of detailed information on earthquake motion warning (with applicable area)". When this parameter is "011", it means "test signal of earthquake motion warning detailed information (no applicable area)". When this parameter is "111", it means "no detailed information on seismic motion warning". 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 detailed information on the seismic motion warning is composed of 88-bit codes. When the signal identification is "000", "001", "010", or "011", the detailed seismic motion warning information includes information on the current time when the seismic motion warning information is sent, information indicating the area subject to the seismic motion warning, and seismic motion. Information such as the latitude / longitude / seismic intensity of the epicenter of the earthquake subject to the warning is transmitted. FIG. 6E shows an example of bit allocation of detailed seismic motion warning information when the signal identification is “000”, “001”, “010”, or “011”. Further, when the signal identification is "111", it is possible to transmit a code or the like for identifying the broadcaster by using the bit of the detailed information on the earthquake motion warning. FIG. 6F shows an example of bit allocation of detailed seismic motion warning information when the signal identification is “111”.

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

The broadcast receiving device 100 can perform various controls for coping with an emergency situation by using the parameters related to the seismic motion warning described with reference to FIGS. 6C, 6D, 6E, and 6F. For example, it is possible to control the presentation of information related to earthquake motion warnings, control to switch low-priority display contents to displays related to earthquake motion warnings, and control to end the application display and switch to displays related to earthquake motion warnings or broadcast program images. is there.

FIG. 6G shows an example of bit allocation of additional information regarding transmission control of the modulated wave. The additional information related to the transmission control of the modulated wave is composed of a synchronization signal, current information, next information, parity bit, and the like. The synchronization signal is composed of a 13-bit code, and has the same code as the 13 bits (B4 to B16) excluding the first 3 bits of the synchronization signal of the TMCC signal. 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 that combines the configuration identification and the synchronization signal is a 16-bit synchronization word equivalent to the TMCC synchronization signal. It becomes. The current information indicates the current information of the transmission parameter additional information when transmitting a 4K broadcast program in the B layer or the C layer, and the transmission parameters related to the virtual D layer or the virtual E layer. The next information indicates information after switching of transmission parameter additional information when transmitting a 4K broadcast program in the B layer or the C layer, and transmission parameters related to the virtual D layer or the virtual E layer.

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

In the example of FIG. 6G, the current information B44 to B56 is the current information of the transmission parameter for the virtual D layer when the virtual D layer is operated. 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 operating the virtual D layer. The current information B109 to B121 is 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 the current terrestrial digital broadcasting. It is not easy to increase the number of bits of the TMCC information of FIG. 5B because it is necessary to maintain compatibility with the current terrestrial digital broadcasting. Therefore, in the embodiment of the present invention, 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 compatibility of the TMCC information with the current terrestrial digital broadcasting. As a result, in the broadcast wave of the polarized terrestrial digital broadcasting service according to the present embodiment, when the B layer / C layer of the transmission wave transmitted by the secondary polarization is used as the virtual D layer / virtual E layer. In addition, the transmission parameters of the virtual D layer / virtual E layer of the transmission wave transmitted with the secondary polarization can be set differently from the transmission parameters of the B layer / C layer of the transmission wave transmitted with the main polarization. It will be possible.

When the virtual D layer or the virtual E layer is not used, the transmission parameter information about the unused layer can be ignored by the broadcast receiving device 100 without any problem. For example, for the virtual D layer or the virtual E layer, when the parameter of the additional layer transmission identification of the TMCC information in FIG. 5J indicates "1" (when indicating that the virtual D layer / virtual E layer is not used), the broadcast receiving device. The 100 may be configured to ignore any value contained in the transmission parameter shown in FIG. 6G for the unused virtual D layer or virtual E layer.

Next, the details of the transmission parameter additional information described with reference to FIG. 6G will be described.

FIG. 6H shows a specific example of transmission parameter additional information. The transmission parameter additional information can include error correction method parameters, constellation type parameters, and the like.

The error correction method sets what kind of coding method is used as the error correction method for the internal code and the external code when transmitting a 4K broadcast program (advanced terrestrial digital broadcasting service) in the B layer or the C layer. Is shown. FIG. 6I shows an example of bit allocation of the error correction method. When this parameter is "000", a convolutional code is used as the internal code and a shortened RS code is used as the external code when transmitting a 4K broadcast program in the B layer or the C layer. When this parameter is "001", the LDPC code is used as the internal code and the BCH code is used as the external code when transmitting the 4K broadcast program in the B layer and the C layer. Further, other combinations may be set so that they can be selected.

Further, when transmitting a 4K broadcast program in the B layer and 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 the constellation format. When this parameter is "000", the carrier modulation mapping method selected in the transmission parameter of TMCC information is applied in a uniform constellation. When this parameter is any of "001" to "111", the carrier modulation mapping method selected in the transmission parameter of TMCC information is applied in a non-uniform constellation. When applying a non-uniform constellation, the optimum value of the non-uniform constellation differs depending on the type of error correction method and its coding rate. Therefore, when the parameter of the constellation format is any of "001" to "111", the broadcast receiving device 100 of this embodiment uses the non-uniform constellation used in the demodulation processing as the parameter of the carrier modulation mapping method. It may be determined based on the parameters of the error correction method and the parameters of the coding rate thereof. The determination may be made by referring to a predetermined table stored in advance by the broadcast receiving device 100 or the like.

[Transmission method for advanced terrestrial digital broadcasting service 1]
In order to realize 4K (horizontal 3840 pixels x 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, there is a bias. The wave transmission method will be described. The polarization amphoteric transmission method according to the embodiment of the present invention is a method having some specifications in common with the current terrestrial digital broadcasting method. For example, 13 segments in the approximately 6 MHz band corresponding to one physical channel are divided, and 7 segments are used for transmitting a 2K (horizontal 1920 pixels x vertical 1080 pixels) broadcast program, and 5 segments are used for transmitting a 4K broadcast program. One segment is assigned to each for mobile reception (so-called one-segment broadcasting). Further, in the 5 segments for 4K broadcasting, not only the horizontally polarized signal but also the vertically polarized signal is used, and the transmission capacity for a total of 10 segments is secured by MIMO (Multiple-Input Multiple-Autoput) technology. The image quality of 2K broadcast programs is maintained by optimizing the latest MPEG-2 Video compression technology, and can be received by current TV receivers. For 4K broadcast programs, HEVC compression is more efficient than MPEG-2 Video. Image quality is ensured by optimizing technology and increasing the number of modulation values. The number of segments allocated for each broadcast may be different from the above.

FIG. 7A shows an example of a polarized wave transmission method 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 of terrestrial digital broadcasting services. The number of physical channels in the frequency band is 40 channels of 13 to 52 channels, and each physical channel has a bandwidth of 6 MHz. In the polarization amphibious transmission method according to the embodiment of the present invention, both the horizontally polarized signal and the vertically polarized signal are used in one physical channel.

FIG. 7A shows two examples (1) and (2) for the 13-segment allocation example. In the example of (1), the 2K broadcast program is transmitted using the horizontally polarized signal segments 1 to 7 (layer B). A 4K broadcast program is transmitted using a total of 10 segments of horizontally polarized signal segments 8 to 12 (C layer) and vertically polarized signal segments 8 to 12 (C layer). The vertically polarized signal segments 1 to 7 (B layer) may be used for transmitting the same broadcast program as the 2K broadcast program transmitted in the horizontally polarized signal segments 1 to 7 (B layer). Alternatively, it may be used for transmission of a broadcast program different from the 2K broadcast program transmitted in the vertically polarized signal segments 1 to 7 (B layer) in the horizontally polarized signal segments 1 to 7 (B layer). Alternatively, it may be used for other data transmission in segments 1 to 7 (layer B) of the vertically polarized signal, or may be unused. The identification information of how to use the segments 1 to 7 (B layer) of the vertically polarized signal is obtained by the receiving device side by the parameters of the 4K signal transmission layer identification of the TMCC signal and the parameters of the additional layer transmission identification already described. Can be transmitted to. In the broadcast receiving device 100, the handling of segments 1 to 7 (layer B) of the vertically polarized signal can be identified by these parameters. Further, a 2K broadcast program transmitted using the B layer of the horizontally polarized signal and a 4K broadcast program transmitted using the C layer of the horizontally / vertically polarized signal transmit the same broadcast program with different resolutions. It may be a simul broadcast, or it may be a broadcast program having different contents. Segment 0 of the horizontal / vertical bipolarized signal transmits the same one-segment broadcast program.

The example of (2) in FIG. 7A is a modified example different from that of (1). In the example of (2), a 4K broadcast program is transmitted using a total of 10 segments of horizontally polarized signal segments 1 to 5 (B layer) and vertically polarized signal segments 1 to 5 (B layer). A 2K broadcast program is transmitted using segments 6 to 12 (C layer) of the horizontally polarized signal. Also in the example of (2), the vertically polarized signal segments 6 to 12 (C layer) are used for transmitting the same broadcast program as the 2K broadcast program transmitted in the horizontally polarized signal segments 6 to 12 (C layer). You may. The vertically polarized signal segments 6 to 12 (C layer) may be used for transmission of a broadcast program different from the 2K broadcast program transmitted in the horizontally polarized signal segments 6 to 12 (C layer). Further, the segments 6 to 12 (C layer) of the vertically polarized signal may be used for other data transmission or may be unused. Since these identification information are the same as in the example of (1), the description thereof will be omitted again.

In addition, in each of the examples of (1) and (2) of FIG. 7A, the case where the horizontally polarized wave is the main polarized wave has been described, but depending on the operation, the horizontally polarized wave and the vertically polarized wave may be reversed. I do not care.

FIG. 7B shows an example of the configuration of a broadcasting system of an advanced terrestrial digital broadcasting service using the polarization amphoteric transmission method according to the embodiment of the present invention. This shows both the transmitting side system and the receiving side system of the advanced terrestrial digital broadcasting service using the polarization amphibious transmission method. The configuration of the broadcasting system of the advanced terrestrial digital broadcasting service using the polarization amphibious transmission method is basically the same as the configuration of the broadcasting system shown in FIG. 1, but the radio tower 300T, which is the equipment of the broadcasting station, is horizontally biased. It is a polarization shared transmission antenna that can simultaneously transmit a wave signal and a vertically polarized signal. Further, in the example of FIG. 7B, in the broadcast receiving device 100, only the channel selection / detection unit 131H and the channel selection / detection unit 131V of the second tuner / demodulation unit 130T are excerpted and described, and the other operation units are omitted. doing.

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

Here, the user may mistakenly connect the coaxial cable 202T1 to the connector portion 100F2 and connect the coaxial cable 202T2 to the connector portion 100F1. In this case, in the channel selection / detection unit 131H and the channel selection / detection unit 131V, there is a possibility that problems such as being unable to distinguish whether the input broadcast signal is a horizontally polarized signal or a vertically polarized signal may occur. In order to prevent the above-mentioned problems, one of the connector portions connecting the antenna (coaxial cable) and the television receiver, for example, the connector portion of the coaxial cable 202T2 and the connector portion 100F2 for transmitting the vertically polarized signal is horizontally polarized. It is conceivable that the coaxial cable 202T1 for transmitting a signal and the F-type connector of the connector portion of the connector portion 100F1 have a different shape from the connector portion. Alternatively, the channel selection / detection unit 131H and the channel selection / detection unit 131V each refer to the main signal identification of the TMCC information of each input signal to determine whether the input broadcast signal is a horizontally polarized signal or a vertically polarized signal. It is sufficient to identify and control the operation.

FIG. 7C shows an example of a configuration example different from the above in the configuration of the broadcasting system of the advanced terrestrial digital broadcasting service using the polarization amphoteric transmission method according to the embodiment of the present invention. As shown in FIG. 7B, the configuration in which the broadcast receiving device 100 is provided with two broadcast signal input connectors and two coaxial cables are used for connecting the antenna 200T and the broadcast receiving device 100 is a configuration in terms of equipment cost and It may not always be suitable for handling during cable wiring. Therefore, in the configuration shown in FIG. 7C, the horizontally polarized signal received by the horizontally polarized light receiving element of the antenna 200T and the vertically polarized signal received by the vertically polarized light receiving element of the antenna 200T are converted into a conversion unit ( It is input to the converter) 201T, and the conversion unit 201T and the broadcast receiving device 100 are connected by a single coaxial cable 202T3. The broadcast signal input from the connector unit 100F3 is demultiplexed and input to the channel selection / detection unit 131H and the channel selection / detection unit 131V. The connector unit 100F3 may have a function of supplying operating power to the conversion unit 201T.

The conversion unit 201T may belong to the equipment of the environment (for example, an apartment house) in which the broadcast receiving device 100 is installed. Alternatively, it may be configured as a device integrated with the antenna 200T and installed in a house or the like. The conversion unit 201T frequency-converts one of the horizontally polarized signal received by the horizontally polarized wave receiving element of the antenna 200T and the vertically polarized wave signal received by the vertically polarized wave receiving element of the antenna 200T. Perform processing. By this processing, the horizontally polarized signal and the vertically polarized signal transmitted from the radio tower 300T to the antenna 200T are separated into different frequency bands by using the horizontally polarized waves and the vertically polarized waves of the same frequency band. It is possible to transmit to the broadcast receiving device 100 at the same time with the coaxial cable 202T3 of the book. If necessary, frequency conversion processing may be performed on both the horizontally polarized signal and the vertically polarized signal, but in this case as well, the frequency bands of both after frequency conversion must be different from each other. .. Further, the broadcast receiving device 100 may be provided with one broadcast signal input connector unit 100F3.

FIG. 7D shows an example of frequency conversion processing. In this example, frequency conversion processing is performed on the vertically polarized signal. Specifically, among the horizontally polarized signal and the vertically polarized signal transmitted in the frequency band of 470 to 710 MHz (the band corresponding to 13ch to 52ch of UHF), the frequency band of the vertically polarized signal is 470 to 710 MHz. Converts from the frequency band to the frequency band of 770 to 1010 MHz. By this processing, signals transmitted using horizontally polarized waves and vertically polarized waves in the same frequency band can be simultaneously transmitted to the broadcast receiving device 100 by a single coaxial cable 202T3 without interfering with each other. Become. The frequency conversion process may be performed on the horizontally polarized signal.

Further, it is preferable that the frequency conversion process is performed on the signal transmitted with the secondary polarization according to the result of referring to the main signal identification of the TMCC information. As described with reference to FIG. 5H, the signal transmitted with the main 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 favorably maintain compatibility with the current terrestrial digital broadcasting service, the signal transmitted with the main polarization is not frequency-converted, but the signal transmitted with the secondary polarization is frequency-converted. Can be said to be preferable.

When frequency-converting a signal transmitted with a secondary polarization, the frequency band of the signal transmitted with a secondary polarization is higher than the frequency band of the signal transmitted with the main polarization in the converted signal. Is desirable to be high. As a result, in the initial scan of the broadcast receiving device 100, if the scan starts from the low frequency side and proceeds to the high frequency side, the signal transmitted in the main polarization is preceded by the signal transmitted in the secondary polarization. You can do an initial scan on the frequency. As a result, it is possible to more preferably perform processing such as reflecting the setting by the initial scan of the current terrestrial digital broadcasting service in the setting by the initial scan of the advanced terrestrial digital broadcasting service.

Further, the frequency conversion process may be performed on all physical channels used in the advanced terrestrial digital broadcasting service, but may be performed only on physical channels using signal transmission by the polarization amphibious transmission method. ..

The frequency band after conversion by the frequency conversion process is preferably between 710 and 1032 MHz. That is, when trying to receive the terrestrial digital broadcasting service and the BS / CS digital broadcasting service at the same time, the broadcasting signal of the terrestrial digital broadcasting service received by the antenna 200T and the broadcasting signal of the BS / CS digital broadcasting service received by the antenna 200B Can be mixed and transmitted to the broadcast receiving device 100 with 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 horizontally polarized signal It is possible to avoid interference between the broadcast signal of the terrestrial digital broadcasting service and the broadcasting signal of the BS / CS digital broadcasting service while avoiding the interference between the frequency and the vertically polarized signal. Further, when considering the reception of the retransmitted broadcast signal by the cable TV (Community Antenna TV or Cable TV: CATV) station, the frequency band of 770 MHz or less (the band corresponding to 62 ch or less of UHF) in the TV broadcast distribution by the cable TV station. Is used, it is more preferable that the frequency band after conversion by the frequency conversion process is between 770 and 1032 MHz, which exceeds the band corresponding to 62ch of UHF.

Further, the bandwidth of the region (part a in the figure) between the frequency band before conversion and the frequency band after conversion by the frequency conversion process is set to be an integral multiple of the bandwidth (6 MHz) of one physical channel. It is preferable to set to. In this way, in the broadcast receiving device 100, frequency setting control can be easily performed when the broadcast signal in the frequency band before conversion and the broadcast signal in the frequency band after conversion are collectively frequency-scanned by the frequency conversion process. There are advantages such as becoming.

As described above, in the polarization amphibious transmission method according to the embodiment of the present invention, both the horizontally polarized signal and the vertically polarized signal are used for the transmission of the 4K broadcast program. 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 by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves. Even when frequency conversion processing is performed and the broadcast signal transmitted in horizontally polarized waves and the broadcast signal transmitted in vertically polarized waves for the same physical channel are input to the receiving device as signals in different frequency bands. In the broadcast receiving device 100 of this embodiment, by appropriately referring to the parameters of the TMCC information shown in FIGS. 5F to 5J (for example, main signal identification and physical channel number identification), transmission is performed with horizontally polarized waves of the same physical channel. It is possible to correctly grasp the combination of the broadcast signal transmitted and the broadcast signal transmitted by vertically polarized waves. As a result, the broadcast receiving device 100 of the present embodiment can suitably receive, demodulate, and reproduce the 4K broadcast program.

In addition, although the example of FIG. 7B, FIG. 7C, and FIG. 7D has described the case where the horizontally polarized wave is the main polarized wave, the horizontally polarized wave and the vertically polarized wave may be reversed depending on the operation. Absent.

As described above, the broadcast wave of the terrestrial digital broadcast transmitted by the polarization amphibious transmission method described above can be received and reproduced by the second tuner / demodulation unit 130T of the broadcast receiving device 100, but the broadcast reception It can also be received by the first tuner / demodulation unit 130C of the device 100. When the broadcast wave of the terrestrial digital broadcast is received by the first tuner / demodulator 130C, among the broadcast signals of the terrestrial digital broadcast broadcast wave, the broadcast signal transmitted in the layer of the advanced terrestrial digital broadcast service is ignored. However, the broadcast signal transmitted in the layer of the current terrestrial digital broadcasting service is reproduced.

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

The pass-through method consists of (1) extracting the transmission signal band and adjusting the level of each terrestrial digital broadcast signal of the terrestrial reception antenna output and transmitting it to the CATV facility at the same frequency as the transmission signal frequency, and (2) terrestrial reception. There is a method of extracting the transmission signal band and adjusting the level of each terrestrial digital broadcast signal of the antenna output and transmitting it to the CATV facility at the frequencies of the VHF band, MID band, SHB band, and UHF band set by the CATV facility manager. .. The device constituting the receiving amplifier for performing the signal processing of the first method or the device constituting the receiving 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 method of the pass-through transmission method is applied to the advanced terrestrial digital broadcasting service of the polarization amphibious transmission method. FIG. 7E shows the head-end equipment 400C of the cable television station and the broadcast receiving device 100. Further, FIG. 7F shows an example of the frequency conversion process at that time. The notation (HV) in FIG. 7F indicates the state of the broadcast signal in which both the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves exist in the same frequency band, and (H). ) Indicates a broadcast signal transmitted in horizontally polarized waves, and (V) indicates a broadcast signal transmitted in vertically polarized waves. The following notations in FIGS. 7H and 7I have the same meaning.

When the pass-through transmission of the first method is applied to the advanced terrestrial digital broadcasting service of the polarization amphibious transmission method of the embodiment of the present invention, the cable television station is applied to the broadcast signal transmitted by the horizontally polarized wave. The head-end equipment 400C of the above performs signal band extraction and level adjustment, and transmits at the same frequency as the transmission signal frequency. On the other hand, for the broadcast signal transmitted in vertical polarization, the signal band extraction and level adjustment are performed in the headend equipment 400C of the cable television station, and the same frequency conversion process as described in FIG. 7D (transmitted in vertical polarization) is performed. The broadcast signal is converted into a frequency band higher than the frequency band of 470 to 770 MHz, which is a band corresponding to 13ch to 62ch of UHF), and then transmitted. By this processing, the frequency bands of the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves do not overlap, so that signal transmission with a single coaxial cable (or optical fiber cable) is possible. It becomes. The transmitted signal can be received by the broadcast receiving device 100 of this embodiment. The process of receiving and demodulating the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves included in the signal in the broadcast receiving device 100 of this embodiment is the same as the description of FIG. 7D. Therefore, the description will be omitted again.

FIG. 7G shows an example of a system configuration when the second method of the pass-through transmission method is applied to the advanced terrestrial digital broadcasting service of the polarization amphibious transmission method. FIG. 7G shows the head-end equipment 400C of the cable television station and the broadcast receiving device 100. Further, FIG. 7H shows an example of the frequency conversion process at that time.

When the pass-through transmission of the second method is applied to the advanced terrestrial digital broadcasting service of the polarization amphibious transmission method of the embodiment of the present invention, the cable television station is applied to the broadcast signal transmitted by the horizontally polarized wave. The signal band is extracted and the level is adjusted in the head-end equipment 400C of the above, and transmission is performed after performing frequency conversion processing to the frequency set by the CATV facility manager. On the other hand, for the broadcast signal transmitted in vertical polarization, the signal band extraction and level adjustment are performed in the headend equipment 400C of the cable television station, and the same frequency conversion process as described in FIG. 7D (transmitted in vertical polarization) is performed. The broadcast signal is converted into a frequency band higher than the frequency band of 470 to 770 MHz, which is the band of 13ch to 62ch of UHF), and then transmitted. In the frequency conversion process shown in FIG. 7H, unlike FIG. 7F, the broadcast signal transmitted in 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 also to a lower frequency band. The frequency conversion is performed so that the range is expanded and rearranged in the range of 90 to 770 MHz. By this processing, the frequency bands of the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves do not overlap, so that signal transmission with a single coaxial cable (or optical fiber cable) is possible. It becomes. The transmitted signal can be received by the broadcast receiving device 100 of this embodiment. The process of receiving and demodulating the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves included in the signal in the broadcast receiving device 100 of this embodiment is the same as the description of FIG. 7D. Therefore, the description will be omitted again.

Further, as another modification of the frequency conversion process of the head-end 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 FIG. 7H to the state shown in FIG. 7I. In this case, the signal band extraction and level adjustment are performed for both the broadcast signal transmitted in the horizontally polarized wave and the broadcast signal transmitted in the vertically polarized wave, and the frequency conversion process to the frequency set by the CATV facility manager is performed. May be performed before sending. In the example of FIG. 7I, both the broadcast signal transmitted by horizontally polarized waves and the broadcast signal transmitted by vertically polarized waves are arranged at frequencies in the range of 90 to 770 MHz (range from VHF1ch to UHF62ch). Since the conversion is performed and the frequency band in the range exceeding UHF62ch is not used, the frequency band utilization efficiency of the broadcast signal is higher than that in FIG. 7H.

Further, 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 receiving the antenna, it is transmitted in horizontal polarization as shown in the example of FIG. 7I. It is also possible to alternately rearrange the broadcast signal and the broadcast signal transmitted in vertical polarization. At this time, as shown in the example of FIG. 7I, the pair of the broadcast signal transmitted in the horizontally polarized light and the broadcast signal transmitted in the vertically polarized light, which were the same physical channel at the time of receiving the antenna, is the physical at the time of receiving the antenna. By alternately rearranging the broadcast signals in the order of channels, when the broadcast receiving device 100 of this embodiment performs the initial scan from the low frequency side, the broadcast signal originally transmitted with the same physical channel and the vertically polarized light are vertically polarized. It is possible to proceed with the initial setting of the pair of broadcast signals transmitted in the above in order in the same physical channel unit, and the initial scan can be performed efficiently.

In addition, although the example of FIG. 7E, FIG. 7F, FIG. 7G, FIG. 7H and FIG. Can be reversed.

As described above, the second tuner / demodulation unit 130T of the broadcast receiving device 100 can also receive and reproduce the broadcast wave of the terrestrial digital broadcast of the polarization amphibious transmission method described above. However, it can also be received by the first tuner / demodulation unit 130C of the broadcast receiving device 100. When the broadcast wave of the terrestrial digital broadcast is received by the first tuner / demodulator 130C, among the broadcast signals of the terrestrial digital broadcast broadcast wave, the broadcast signal transmitted in the layer of the advanced terrestrial digital broadcast service is ignored. However, the broadcast signal transmitted in the layer of the current terrestrial digital broadcasting service is 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, as an example different from the above-mentioned transmission method of the advanced terrestrial digital broadcasting service according to the embodiment of the present invention, the layered multiplex transmission method is used. explain. The layer division multiplexing transmission system according to the embodiment of the present invention is a system that shares some specifications with the current terrestrial digital broadcasting system. For example, the broadcast wave of the 4K broadcast service having a low signal level is multiplexed and transmitted on the same channel as the broadcast wave of the current 2K broadcast service. For 2K broadcasting, the reception level of 4K broadcasting is suppressed to the required C / N or less, and reception is performed as before. For 4K broadcasting, while expanding the transmission capacity by increasing the modulation value, etc., the 2K broadcasting wave is canceled and the remaining 4K broadcasting wave is received by using the receiving technology corresponding to the LDM (Layered Division Multiplexing) technology. Do.

FIG. 8A shows an example of a layer division multiplexing transmission system in the advanced terrestrial digital broadcasting service according to the embodiment of the present invention. 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 output as a composite wave in the same frequency band. For example, 64QAM or the like may be used as the modulation method in the upper layer, and 256QAM or the like may be used as the modulation method in the lower layer. The 2K broadcast program transmitted using the upper layer and the 4K broadcast program transmitted using the lower layer may be simul broadcasts that transmit broadcast programs having the same content at different resolutions, or may have different contents. It may be the one that transmits the broadcast program of. Here, the upper layer is transmitted with high power, and the lower layer is transmitted with low power. The difference between the modulated wave level in the upper layer and the modulated wave level in the lower layer (difference in power) is called an injection level (IL), which is a value set on the broadcasting station side. The injection level generally indicates the difference in modulated wave level (difference in power) as a relative ratio (dB) in logarithmic representation.

FIG. 8B shows an example of the configuration of a broadcasting system of an advanced terrestrial digital broadcasting service using the layer division multiplexing transmission method according to the embodiment of the present invention. The configuration of the broadcasting system of the advanced terrestrial digital broadcasting service using the layered multiplex transmission method is basically the same as the configuration of the broadcasting system shown in FIG. 1, but the radio tower 300L, which is the equipment of the broadcasting station, is on the upper side. It is a transmission antenna that transmits a broadcast signal in which 2K broadcasts on the lower layer and 4K broadcasts on the lower layer are multiplexed. Further, in the example of FIG. 8B, in the broadcast receiving device 100, only the channel selection / detection unit 131L of the third tuner / demodulation unit 130L is excerpted and described, and the description of the other operating units is omitted.

The broadcast signal received by the antenna 200L is input from the connector unit 100F4 to the channel selection / detection unit 131L via the conversion unit (converter) 201L and the coaxial cable 202L. Here, in the above configuration, when a broadcast signal is transmitted from the antenna 200L to the broadcast receiving device 100, the conversion unit 201L performs frequency conversion amplification processing on the broadcast signal as shown in FIG. 8C. Is also good. That is, when an antenna 200L is installed on the roof of an apartment or the like and a broadcasting signal is transmitted to the broadcasting receiving device 100 in each room by a coaxial cable 202L having a long cable length, the broadcasting signal is attenuated and the channel selection / detection unit is used. In 131L, there is a possibility that a problem may occur in which the 4K broadcast wave in the lower layer cannot be received correctly.

Therefore, in order to prevent the above-mentioned problems, the conversion unit 201L performs frequency conversion amplification processing on the 4K broadcast signal in the lower layer. In the frequency conversion amplification processing, the frequency band of the 4K broadcast signal in the lower layer is changed from the frequency band of 470 to 710 MHz (the band corresponding to 13ch to 52ch of UHF) to, for example, 770 to 1010 MHz exceeding the band corresponding to 62ch of UHF. Convert to the frequency band of. Further, a process of amplifying the 4K broadcast signal in the lower layer to a signal level at which the influence of attenuation by the cable does not matter is performed. By performing such processing, it is possible to avoid the influence of the attenuation of the broadcast signal during the coaxial cable transmission while avoiding the interference between the 2K broadcast signal and the 4K broadcast signal. If the influence of attenuation does not matter, such as when the coaxial cable 202L has a short cable length, the conversion unit 201L and the frequency conversion amplification process may not be necessary.

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 1032 MHz, which exceeds the band corresponding to 62ch of UHF (retransmission by a cable television station, etc.). The bandwidth of the region between the frequency band before conversion and the frequency band after conversion by the frequency conversion amplification process is an integral multiple of the bandwidth (6 MHz) of one physical channel. It is preferable to set the frequency conversion so as to be the same, and the frequency conversion amplification processing may be performed only for the physical channel using the signal transmission by the layer division multiplex transmission method. Since the description is the same as that of the present embodiment according to the above, the description will be omitted again.

In the broadcast receiving device 100 of the present embodiment, whether the received broadcast signal is a broadcast signal transmitted in the lower layer or a broadcast signal transmitted in the upper layer is determined by the TMCC information described with reference to FIG. 5H. It is possible to identify using the upper and lower layer identification bits. Further, the broadcast receiving device 100 of the present embodiment uses the frequency conversion processing identification bit of the TMCC information described with reference to FIG. 5F to determine whether or not the received broadcast signal is a broadcast signal whose frequency has been converted after receiving the antenna. Can be identified. Further, the broadcast receiving device 100 of the present embodiment uses the 4K signal transmission layer identification bit of the TMCC information described with reference to FIG. 5I to determine whether or not the received broadcast signal transmits a 4K program in the lower layer. It is possible to identify. It is not impossible to perform these identification processes by demodulating the data carriers and referring to the control information contained in the stream, but the data carriers need to be demodulated, which complicates the processing. It is possible to speed up the initial scan of the broadcast receiving device 100, for example, because the processing is simpler and faster when the identification is performed by referring to the parameters of the TMCC information described above.

As described above, the channel selection / detection unit 131L of the third tuner / demodulation unit 130L of the broadcast reception device 100 according to the embodiment of the present invention has a reception function corresponding to the LDM (layer division multiplexing) technology. Therefore, the conversion unit 201L shown in FIG. 8C is not always required between the antenna 200L and the broadcast receiving device 100.

As described above, the broadcast wave of the terrestrial digital broadcast transmitted by the layered multiplex transmission method described above can be received and reproduced by the third tuner / demodulation unit 130L of the broadcast receiving device 100, but the broadcast reception It can also be received by the first tuner / demodulation unit 130C of the device 100. When the broadcast wave of the terrestrial digital broadcast is received by the first tuner / demodulator 130C, among the broadcast signals of the terrestrial digital broadcast broadcast wave, the broadcast signal transmitted in the layer of the advanced terrestrial digital broadcast service is ignored. However, the broadcast signal transmitted in the layer of the current terrestrial digital broadcasting service is reproduced.

[MPEG-2 TS method]
The broadcasting system of this embodiment can support MPEG-2 TS adopted in the current terrestrial digital broadcasting service or the like as a media transport system for transmitting data such as video and audio. Specifically, the stream system transmitted by the OFDM transmission wave of FIG. 4D (1) is MPEG-2 TS, and among the OFDM transmission waves of FIGS. 4D (2) and 4D (3), the current ground is used. The method of the stream transmitted in the layer in which the digital broadcasting service is transmitted is MPEG-2 TS. Further, the stream method obtained by demodulating the transmitted wave by the first tuner / demodulation unit 130C of the broadcast receiving device 100 of FIG. 2 is MPEG-2 TS. Further, among the streams obtained by demodulating the transmission wave by the second tuner / demodulation unit 130T, the stream system 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 wave with the third tuner / demodulation unit 130L, the stream system corresponding to the layer in which the current terrestrial digital broadcasting service is transmitted is MPEG-2 TS.

The MPEG-2 TS is characterized in that components such as video and audio that make up a program are multiplexed into one packet stream together with a control signal and a clock. Since it is treated as one packet stream including the clock, it is suitable for transmitting one content on one transmission line in which transmission quality is ensured, and is adopted in many current digital broadcasting systems. In addition, it is possible to realize bidirectional communication via a bidirectional network such as a fixed network / mobile network, and by linking digital broadcasting services with functions using a broadband network, acquisition of additional content via the broadband network. It is possible to support a broadcasting communication cooperation system that combines arithmetic processing in a server device and presentation processing in cooperation with a mobile terminal device in combination 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, other control signals, etc. are transmitted in section format.

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

<Table used for program sequence information>
FIG. 9B shows a list of tables used in the program arrangement information of the MPEG-2 TS system broadcasting system. In this embodiment, the table shown below is used as the table used in the program sequence 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) Table set by the business operator

<Table used in digital broadcasting>
FIG. 9C shows a list of tables used for other than the program arrangement information of the MPEG-2 TS system broadcasting system. In this embodiment, the table shown below is used as a table used other than the program sequence 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) Table set by the business operator

<Descriptor used in program sequence information>
9D, 9E, and 9F show a list of descriptors used in the program arrangement information of the MPEG-2 TS system broadcasting system. In this embodiment, the following descriptors are used as the program sequence 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 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) Hybrid Information Descriptor
(68) Scrambler Descriptor
(69) Descriptor set by the operator

<Descriptor used in digital broadcasting>
FIG. 9G shows a list of descriptors used for other than the program arrangement information of the MPEG-2 TS system broadcasting system. In this embodiment, the following descriptors are used as the descriptors used other than the program sequence 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) Descriptor set by the business operator

<Descriptor used in INT>
FIG. 9H shows a list of descriptors used in the INT of the MPEG-2 TS system broadcasting system. In this embodiment, the following descriptors are used as the descriptors used in INT. Note that the descriptors used in the above-mentioned program sequence information and the descriptors used in other than the program sequence 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 business operator

<Descriptor used in AIT>
FIG. 9I shows a list of descriptors used in the AIT of the MPEG-2 TS system broadcasting system. In this embodiment, the following descriptors are used as the descriptors used in AIT. Note that the descriptors used in the above-mentioned program sequence information and the descriptors used in other than the program sequence 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) Playback Application Descriptor
(10) Simple recording / playback application location descriptor
(Simple Playback Application Location Descriptor)
(11) Application Expiration Descriptor
(12) Descriptor set by the business operator

[MMT method]
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, among the OFDM transmission waves of FIGS. 4D (2) and 4D (3), the stream system transmitted in the layer in which the advanced terrestrial digital broadcasting service is transmitted is, in principle, the MMT system. Further, among the streams obtained by demodulating the transmitted wave by the second tuner / demodulation unit 130T of the broadcast receiving device 100 of FIG. 2, the stream method corresponding to the layer in which the advanced terrestrial digital broadcasting service is transmitted is, in principle, MMT. Is. Similarly, among the streams obtained by demodulating the transmission wave by the third tuner / demodulation unit 130L, the stream system corresponding to the layer in which the advanced terrestrial digital broadcasting service is transmitted is, in principle, MMT. As a modification, the MPEG-2 TS stream may be operated by an advanced terrestrial digital broadcasting service. The stream method obtained by demodulating the transmitted wave with the fourth tuner / demodulation unit 130B is MMT.

The MMT method responds to changes in the environment related to content distribution, such as the diversification of content in recent years, the diversification of devices that use content, the diversification of transmission lines that distribute content, and the diversification of content storage environments. This is a newly formulated media transport system because the functions of the TS system are limited.

The code of the video signal and the audio signal of the broadcast program is MFU (Media Fragment Unit) / MPU (Media Processing Unit), which is put on the MMTP (MMT Protocol) payload to form an MMTP packet and transmitted as an IP packet. In addition, data contents and subtitle signals related to broadcast programs are also in the MFU / MPU format, put 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 in the broadcast transmission line, and UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used in the communication line. Further, in the broadcast transmission line, a TLV multiplexing method may be used for efficient transmission of IP packets.

FIG. 10A shows the protocol stack of MMT in the broadcast transmission line. Further, FIG. 10B shows the protocol stack of MMT in the communication line. In the MMT method, a mechanism for transmitting two types of control information, MMT-SI and TLV-SI, is prepared. MMT-SI is control information indicating the structure of a broadcast program and the like. It is used as an MMT control message format, put on the MMTP payload, converted into an MMTP packet, and transmitted as an IP packet. The TLV-SI is control information related to the multiplexing of IP packets, and provides information for channel selection and information on the correspondence between the IP address and the service.

[Control signal of broadcasting system using MMT method]
As described above, in the MMT method, TLV-SI and MMT-SI are prepared as control information. TLV-SI consists of a table and a descriptor. The table is transmitted in section format and the descriptors are placed within the table. The MMT-SI is composed of three layers: a message that stores a table and a descriptor, a table that has elements and attributes that indicate specific information, and a descriptor that indicates more detailed information.

<Table 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.

(1) Network Information Table for TLV
(2) Address Map Table
(3) Table set by the business operator

<Descriptor used in TLV-SI>
FIG. 10D shows a list of descriptors used in the TLV-SI of the MMT broadcasting system. In this embodiment, the following is used as the descriptor of TLV-SI.

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

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

(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 the operator

<Table used in MMT-SI>
FIG. 10F shows a list of tables used in MMT-SI of the MMT type broadcasting system. In this embodiment, the table shown below is used as the table of MMT-SI.

(1) MPT (MMT Package Table)
(2) PLT (Package List Table)
(3) LCT (Layout Configuration Table)
(4) ECM (Entitlement Control Message)
(5) EMM (Entitlement Management Message)
(6) CAT (MH) (Conditional Access Table (MH))
(7) DCM (Download Control Message)
(8) DMM (Download Management Message)
(9) MH-EIT (MH-Event Information Table)
(10) MH-AIT (MH-Application Information Table)

(11) MH-BIT (MH-Broadcaster Information Table)
(12) MH-SDTT (MH-Software Download Trigger Table)
(13) MH-SDT (MH-Service Description Table)
(14) MH-TOT (MH-Time Offset Table)
(15) MH-CDT (MH-Common Data Table)
(16) DDM table (Data Directory Management Table)
(17) DAM table (Data Asset Management Table)
(18) DCC table (Data Content Configuration Table)
(19) EMT (Event Message Table)
(20) Table set by the business operator

<Descriptor used in MMT-SI>
10G, 10H, and 10I show a list of descriptors used in the MMT-SI of the MMT broadcasting system. In this embodiment, the following is used as the descriptor of MMT-SI.

(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 Extended 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 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-ComppressionType 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 Downloadable Content Descriptor
(MH-Network Download Content Descriptor)
(44) 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 / Playback Application Descriptor
(MH-Playback Application Descriptor)
(66) MH-Simple Recording / Playback 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) Descriptor set by the business operator

<Relationship between data transmission and each control information in the MMT method>
FIG. 10J shows the relationship between data transmission and a typical table in an MMT type broadcasting system.

In the MMT type broadcasting system, data can be transmitted by a plurality of routes such as a TLV stream via a broadcasting transmission line and an IP data flow via a communication line. The TLV stream includes a TLV-SI such as TLV-NIT and AMT, and an IP data flow which is a data flow of an IP packet. The IP data flow includes a video asset including a series of video MPUs and an audio asset including a series of audio MPUs. Further, a subtitle asset including a series of subtitle MPUs, a character super asset including a series of character super MPUs, a data asset including a series of data MPUs, and the like may be included. These various assets are associated with each package by the MPT (MMT package table) stored in the PA message and transmitted. 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 the assets in the TLV stream, but as shown in FIG. 10J, the assets transmitted by the IP data flow of the communication line can also be included. This can be realized by including the location information of each asset included in the package in the MPT so that the broadcast receiving device 100 can grasp the reference destination of each asset. As the location information of each asset,
(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 MPEG2-TS of broadcasting Data (5) Data multiplexed in MPEG2-TS format in the IP data flow (6) Various data to be transmitted by various transmission paths such as data at the specified URL can be specified. ..

The MMT type broadcasting system further has the concept of an event. An event is a concept indicating a so-called program handled by MH-EIT included in an M2 section message and sent. Specifically, in the package indicated by the event package descriptor stored in the MH-EIT, a series of data included in the duration period from the disclosure time stored in the MH-EIT is included in the concept of the event. The data included. The MH-EIT is used in the broadcast receiving device 100 for various processes for each event (for example, program guide generation process, recording reservation and viewing reservation control, copyright management process such as temporary storage, etc.). Can be done.

[Broadcast receiver channel setting process]
<Initial scan>
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 described in NIT. Therefore, the broadcast receiving device 100 of the embodiment of the present invention, which is compatible with the current terrestrial digital broadcasting, is the terrestrial digital broadcasting (advanced terrestrial digital broadcasting, or advanced terrestrial digital broadcasting and the current terrestrial digital broadcasting) of the embodiment of the present invention. It has a function to search (scan) all receivable channels at the reception point and create a service list (receivable frequency table) based on the service ID for terrestrial digital broadcasting in which broadcasting is simultaneously transmitted in a different layer. There is a need. In areas where the same network ID can be received by different physical channels by MFN (Multi Frequency Network), basically select a channel with good reception C / N or BER (Bit Error Rate). It should work so that it is stored in the service list.

In the advanced BS digital broadcasting or the advanced CS digital broadcasting received by the fourth tuner / demodulation unit 130B of the broadcast receiving device 100 of the embodiment of the present invention, the broadcast receiving device 100 acquires the service list stored in the TLV-NIT. You don't have to create a service list. Therefore, the initial scan and the rescan described later are not required for the advanced BS digital broadcast or the advanced CS digital broadcast received by the fourth tuner / demodulation unit 130B.

<Rescan>
The broadcast receiving device 100 of the embodiment of the present invention has a rescan function in case of opening a new station, installing a new relay station, changing the receiving point of a television receiver, or the like. When changing the preset information, the broadcast receiving device 100 can notify the user to that effect.

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

In the channel setting process, the reception function control unit 1102 first sets the residential area (selects the area where the broadcast receiving device 100 is installed) based on the user's instruction (S101). At this time, instead of the user's instruction, the residential area may be automatically set based on the installation position information of the broadcast receiving device 100 acquired by a predetermined process. 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 I / F unit 125 is connected. .. Next, the initial value of the frequency range to be scanned is set, and the tuner / demodulation unit (first tuner / demodulation unit 130C and second tuner / demodulation unit 130T and third tuner / third tuner / When the demodulation unit 130L is not distinguished, it is described as follows. The same applies hereinafter) (S102).

The tuner / demodulation unit executes tuning based on the instruction (S103), and if it succeeds in locking to the set frequency (S103: Yes), proceeds to the process of S104. If the lock is not successful (S103: No), the process proceeds to S111. In the process of S104, the C / N is confirmed (S104), and when a predetermined or higher C / N is obtained (S104: Yes), the process proceeds to the process of S105 and the reception confirmation process is performed. If a predetermined C / N or more 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, by acquiring and collating the NIT, it is confirmed whether or not the NIT is valid data (S106). When the NIT acquired in the process of S106 is valid data, the reception function control unit 1102 acquires information such as a transport stream ID and an original network ID from the NIT. In addition, distribution system information regarding the physical conditions of the broadcast transmission line corresponding to each transport stream ID / original network ID is acquired from the terrestrial distribution system descriptor. It also gets a list of service IDs from the service list descriptor.

Next, the reception function control unit 1102 confirms whether or not the transport stream ID acquired in the process of S106 has already been acquired by confirming the service list stored in the receiving device (S107). .. When the transport stream ID acquired in the process of S106 is not already acquired (S107: No), various information acquired in the process of S106 is added to the service list in association with the transport stream ID (S108). When the transport stream ID acquired in the process of S106 has already been acquired (S107: Yes), the comparison between the BER acquired in the process of S105 and the BER when the transport stream ID described in the service list is acquired is compared. Do (S109). As a result, when the BER acquired in the process of S105 is better (S109: Yes), the service list is updated with various information acquired in the process of S106 (S110). If the BER acquired in the process of S105 is not better (S109: No), various information acquired in the process of S106 is discarded.

Further, at the time of the above-mentioned service list creation (addition / update) process, the remote control key ID may be acquired 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.

When the reception confirmation process is completed, 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 frequency value set in the tuner / demodulation unit is increased (S112), and the processes of S103 to S110 are repeated. 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 service list created (added / updated) in the above process is presented to the user as a result of the channel setting process (S113). Further, if there is duplication of remote control keys or the like, the user may be notified to that effect and urged to change the remote control key settings or the like (S114). The service list created / updated in the above process is stored in the non-volatile memory such as the ROM 103 of the broadcast receiving device 100 and the storage (storage) unit 110.

FIG. 11B shows an example of the data structure of NIT. In the figure, "transportrt_stream_id" corresponds to the above-mentioned transport stream ID, and "original_network_id" corresponds to the original network ID. Further, FIG. 11C shows an example of the data structure of the ground distribution system descriptor. “Gard_interval”, “transmission_mode”, “frequency”, etc. in the figure correspond to the above-mentioned distribution system information. FIG. 11D shows an example of the data structure of the service list descriptor. “Service_id” in the figure corresponds to the above-mentioned service ID. FIG. 11E shows an example of the data structure of the TS information descriptor. The "remote_control_key_id" in the figure corresponds to the above-mentioned remote control key ID.

The broadcast receiving device 100 may control the frequency range to be scanned as described above so as to be appropriately changed according to the broadcast service to be received. For example, when the broadcast receiving device 100 receives the broadcast wave of the current terrestrial digital broadcasting service, it is controlled to scan the frequency range of 470 to 770 MHz (corresponding to 13ch to 62ch of the physical channel). That is, the initial value of the frequency range is set to 470 to 476 MHz (center frequency 473 MHz), the final value of the frequency range is set to 764 to 770 MHz (center frequency 767 MHz), and the frequency value of +6 MHz is increased in the processing of S112. Control to do so.

Further, when the broadcast receiving device 100 receives a broadcast wave including an advanced terrestrial digital broadcasting service, the frequency range of 470 to 10 MHz (frequency conversion processing shown in FIG. 7D and frequency conversion amplification processing shown in FIG. 8C) Control to scan). That is, the initial value of the frequency range is set to 470 to 476 MHz (center frequency 473 MHz), the final value of the frequency range is set to 1004 to 1010 MHz (center frequency 1007 MHz), and the frequency value of +6 MHz is increased in the processing of S112. Control to do so. Even when the broadcast receiving device 100 is receiving the advanced terrestrial digital broadcasting service, if it is determined that the above-mentioned frequency conversion processing and frequency conversion amplification processing are not performed, the frequency is 470 to 770 MHz. It suffices to control to scan only the range. The selection control of the frequency range to be scanned can be performed by the broadcast receiving device 100 based on the system identification of the TMCC information, the frequency conversion processing identification, and the like.

Further, when the broadcasting system of the embodiment of the present invention has the configuration shown in FIG. 7C, for example, and the broadcasting receiving device 100 receives the advanced terrestrial digital broadcasting service of the polarization amphibious transmission system, the channel selection / detection is performed. 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 by polarization). By controlling in this way based on the system identification of the TMCC information and the frequency conversion processing identification, it is possible to omit scanning in an unnecessary frequency range and reduce the time required for channel setting. Further, in this case, both the channel selection / detection unit 131H and the channel selection / detection unit 131V may advance the operation sequence of FIG. 11A in parallel to synchronize the loop of the frequency up S112 in the operation sequence of FIG. 11A. .. At this time, in the loop of the same timing in the loop of increasing the frequency in the operation sequence of FIG. 11A, the pair of the horizontally polarized signal and the vertically polarized signal transmitted on the same physical channel are configured to be received in parallel. Then, the control information inside the packet stream of the advanced terrestrial digital service transmitted as a pair of the horizontally polarized signal and the vertically polarized signal can be decoded and acquired during the loop processing. This is preferable because scanning and service list creation proceed efficiently.

Similarly, the broadcast receiving device 100 includes a so-called double tuner configuration (for example, a plurality of third tuners / demodulation units 130L) in which a plurality of tuners / demodulation units (channel selection / detection units) are further provided in the configuration shown in FIG. 8B. In the case of receiving the advanced terrestrial digital broadcasting service of the layered multiplex transmission system, one of the double tuners scans the frequency range of 470 to 770 MHz and the other scans the frequency range of 770 to 1010 MHz. (If frequency conversion amplification processing is performed). By controlling in this way, it is possible to reduce the time required for channel setting as described above.

As described with reference to FIGS. 8A, 8B, and 8C, the terrestrial digital broadcasting service transmitted in either the upper layer or the lower layer in the configuration shown in FIG. 8B is the current terrestrial digital broadcasting service. is there. Therefore, for example, out of 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, and the other frequency range is obtained. In parallel, scanning may be performed by the third tuner / demodulator 130L. In this case as well, the time required for channel setting can be reduced as in the case of the parallel scan by the double tuner of the third tuner / demodulation unit 130L described above. Whether the current terrestrial digital broadcasting service is transmitted or the advanced terrestrial digital broadcasting service is transmitted in the frequency range of 470 to 770 MHz or the frequency range of 770 to 1010 MHz is the operation of the initial scan / rescan. Before starting the sequence, a total of two points, one point for each frequency range, for example, two points of 470 to 476 MHz (center frequency 473 MHz) and 770 to 767 MHz (center frequency 773 MHz), are measured by the third tuner / demodulator 130L. It can be identified by receiving, acquiring TMCC information transmitted at each frequency, and referring to a parameter (for example, a parameter for system identification) stored in the TMCC information.

In addition, in the advanced terrestrial digital broadcasting service of the polarization dual-purpose transmission system, both the horizontally polarized signal and the vertically polarized signal such as the 4K broadcast program of the C layer shown in the layer division example (1) of FIG. 7A, for example. For channels with broadcast programs transmitted using, the same transport ID is detected in both scans of the 470-770 MHz frequency range and the 770-1010 MHz frequency range, which is serviced as one channel. List it. Further, in the case of the B-layer 2K broadcast program shown in FIG. 7A, if the same broadcast program is transmitted in the B layer of the horizontally polarized signal and the B layer of the vertically polarized signal, the same transport is performed. Even if the ID is detected, it may 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 polarizations, it is merged into one channel and recognized, and is not recognized as different channels. In this way, in the channel selection process using the service list, it is possible to avoid confusion among users due to the existence of exactly the same broadcast program on another channel.

On the other hand, in the advanced terrestrial digital broadcasting service of the polarization amphibious transmission method, when different broadcast programs are transmitted in the B layer of the horizontally polarized signal and the B layer of the vertically polarized signal (B of the vertically polarized signal). When the hierarchy is treated as a virtual D hierarchy), 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 horizontally polarized signal and the B layer of the vertically polarized signal can be determined by referring to the additional layer transmission identification parameter of the TMCC information in the broadcast receiving device 100. It can be identified by judgment.

[Broadcast receiver channel selection process]
The broadcast receiving device 100 of the embodiment of the present invention has, as a program channel selection function, one-touch channel selection by the one-touch key of the remote controller, channel up / down channel selection by the channel up / down key of the remote controller, and 10 keys of the remote controller. 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 above-mentioned initial scan / rescan. In addition, after channel selection, information on the channel selected by displaying a banner, etc. (3-digit number used for direct channel selection, branch number, TS name, service name, logo, video resolution information (distinguishing between UHD, HD, SD, etc.) ), With or without video resolution up / down conversion, number of audio channels, with or without audio downmix, etc.) is displayed. In this way, the user can visually obtain the information of the channel after channel selection, and can confirm whether or not the channel can be selected to the desired channel. An example of processing in each channel selection method is described below.

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

<Example of up / down channel selection processing using the channel up / down button>
(1) By pressing the channel up / down keys on the remote controller, the channels are selected in the order of the 3-digit numbers used for direct channel selection.
(1-1) When the up key is pressed, the service adjacent to the upper side of the 3-digit number is selected. However, if the current 3-digit number value is the maximum value in the service list, the service with the minimum value number is selected.
(1-2) When the down key is pressed, the service adjacent to the lower side of the 3-digit number is selected. However, if the current 3-digit number value is the minimum value in the service list, the service with the maximum value is selected.
(2) Set the last mode and display the channel information after channel selection.

<Processing example of direct channel selection>
(1) When direct channel selection is selected, the input of a 3-digit number is awaited.
(2-1) If the input of the 3-digit number is not completed within the predetermined time (about 5 seconds), the mode returns to the normal mode 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 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. To do.
(3) If a channel exists, channel selection processing is performed, the last mode is set, and channel information is displayed after channel selection.

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

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

The remote controller 180R includes a power key 180R1 for turning on / off the power of the broadcast receiving device 100 (standby on / off) and a cursor key (up, down, left, right) 180R2 for moving the cursor up / down / left / right. , A determination key 180R3 for determining an item at a cursor position as a selection item, and a return key 180R4 are provided.

Further, the remote controller 180R 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 broadcasting receiving device 100. Further, the remote controller 180R inputs a one-touch key (1 to 12) 180R6 used for one-touch channel selection, a channel up / down key 180R7 used for channel up / down channel selection, and a three-digit number during direct channel selection. It is equipped with 10 keys used for. In the example shown in FIG. 12A, the 10-key pad 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. ..

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

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

In addition, the remote controller 180R has a video key 180RE for selecting a related video, an audio key 180RF for switching audio ES and switching between two languages, and switching on / off subtitles and switching subtitle language. It is provided with a subtitle key 180RG for the purpose. Further, the remote controller 180R includes a volume key 180RH for increasing / decreasing the volume of the audio output and a mute key 180RI for switching the audio output on / off.

<Example of network switching processing using an altitude digital key>
The remote controller 180R of the broadcast receiving device 100 of the embodiment of the present invention includes "altitude terrestrial digital key", "terrestrial digital key", "altitude BS key", "BS key", and "CS key" as the network switching key 180R5. Here, the "advanced terrestrial digital key" and the "terrestrial digital key" are used in the advanced terrestrial digital broadcasting service, for example, when simul broadcasting of a 4K broadcast program and a 2K broadcast program is carried out at different levels. In the pressed state, the channel selection of the 4K broadcast program may be prioritized when the channel is selected, and in the pressed state, the channel selection of the 2K broadcast program may be prioritized when the channel is selected. By controlling in this way, for example, when there are many errors in the transmission wave of the 4K broadcast program in a situation where the 4K broadcast program can be received, the 2K broadcast is forcibly performed by pressing the "terrestrial digital key". Control such as being able to select a program becomes possible.

<Screen display example at the time of channel selection>
As described above, the broadcast receiving device 100 of the embodiment of the present invention is a channel selected by a banner display or the like when channel selection by one-touch channel selection, channel up / down channel selection, direct channel selection, or the like is executed. It has a function to display information.

FIG. 12B shows an example of banner display at the time of channel selection. Banner display 192A1 is an example of a banner display displayed when a 2K broadcast program is selected. For example, the program name, the start time / end time of the program, the network type, the direct channel selection key number of the remote controller, and the service logo. And a 3-digit number, and so on. Further, 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 same information as the banner display 192A1 described above, the program being received is a 4K broadcast program. A mark symbolizing "altitude" is further displayed to indicate that. Further, when a resolution conversion process, a downmix process, or the like is performed, a display indicating that fact may be displayed. In the example of the banner display 192A2, as an example, it is displayed that the down-conversion process from UHD resolution to HD resolution and the downmix process from 22.2ch to 5.1ch have been performed.

By performing these displays on the broadcast receiving device 100, when the same content is simultaneously broadcast as broadcast programs of different qualities such as a 2K broadcast program and a 4K broadcast program by simulcast or the like, any broadcast program Can be suitably grasped by the user as to whether or not is displayed.

According to the system of the advanced digital broadcasting service having some or all the functions of each function according to the embodiment of the present invention described above, more advanced advanced digital in consideration of compatibility with the current digital broadcasting service. It becomes possible to provide transmission technology and reception technology for broadcasting services. That is, it is possible to provide a technique for more preferably transmitting or receiving an advanced digital broadcasting service.

(Example 2)
[System configuration of broadcast receiver clock synchronization / presentation synchronization]
In this embodiment, an example of the simulcast presentation switching process and clock synchronization / presentation synchronization in the advanced digital broadcasting service system described in the first embodiment will be described. In addition, in order to simplify the explanation, only the points different from the first embodiment will be described below in this embodiment. Since the points not mentioned in this embodiment are the same as those in the first embodiment, the repeated description will be omitted.

In the MPEG2-TS method, synchronization control is performed by a time stamp based on time information called PCR (Program Lock Reference). The MPEG2-TS protocol stack is shown in FIG. 9A. The PCR-based time system consists of an upper 33-bit counter that operates at 90 kHz and a lower 9-bit counter that operates at 27 MHz. The count of 300 in the lower 9 bits corresponds to 1 count in the upper 90 kHz. The upper 33-bit counter makes a round in about 26.5 hours, and the counter returns to 0. On the other hand, in the MMT method, the protocol stack of the MMT method in which synchronization control is performed by a time stamp based on time information called NTP (Network Time Protocol) is shown in FIGS. 10A and 10B. The clock synchronized with this NTP consists of the upper 32 bits (in seconds) and the lower 32 bits (the part after the decimal point). Therefore, the clock based on NTP has a period of about 136 years that can be expressed, and the time expression system is completely different from the PCR system.

FIG. 13 is an example of the system clock unit 40000 used by the broadcast receiving device 100 of this embodiment for clock synchronization / presentation synchronization. It has an NTP clock counter 40001 based on NTP and a PCR clock counter 40002 based on PCR.

The PCR time information is transmitted in the extension part (adaptation field) of the TS packet header (FIG. 14). It is composed of upper 33 bits, lower 9 bits, and reserve 6 bits.

FIG. 15A shows an example of the configuration of time information transmitted by NTP. Further, an example of the data structure of the MPU time stamp descriptor is shown in FIG. 15B. Although NTP is transmitted in this data format, as shown in FIG. 10B, it should be matched with NTP included in the signal received by the communication line path (for example, the communication line receivable by the LAN communication unit 121 in FIG. 2A). Can be done.

In the broadcasting system that handles the MMT content of the present embodiment, the UTC is transmitted from the broadcasting transmission system to a receiver (broadcast receiving device 100 or the like of the present embodiment) in a 64-bit length NTP time stamp format. In the NTP time stamp format, "more than a second" of UTC is represented by 32 bits, and "less than a second" is represented by 32 bits. However, in reality, it is difficult to reproduce one second with 32-bit accuracy. Therefore, as the NTP system clock for synchronizing the MMT contents and the NTP system clock for operating the NTP format clock, for example, as shown in FIG. 13, "2 to the 24th power" Hz (about 16. An NTP clock counter 40001 using a frequency of 8 MHz) may be used. Considering that the PCR system clock in the broadcasting system that handles MPEG2-TS content was 27 MHz and that the hardware configuration of the receiver can be easily constructed, "2 to the 24th power" to "2 to the 28th power". It is desirable to adopt a frequency of the power of 2 as the NTP system clock.

When the NTP system clock is set to a power frequency of 2 such as "2 to the 24th power" to "2 to the 28th power" on the broadcast transmission system side or the receiver side that handles MMT contents, it is broadcast. In the NTP time stamp format transmitted from the transmission system side to the receiver side, the lower 8 to 4 bits that are not referred to by the PLL (Phase Locked Loop) system for reproducing the NTP system clock or the NTP format clock are ". It may be fixed to "0" or "1". That is, if the NTP system clock is "2 to the nth power" Hz (n = 24 in the example of FIG. 13), the lower "32-n" bits of the NTP time stamp format are fixed to "0" or "1". You may try to do it. Alternatively, the receiver may perform processing so as to ignore the lower "32-n" bits of the NTP time stamp format.

On the broadcast transmission system side, when NTP format time information is obtained from the outside, a PLL system is configured with a 32 + n-bit counter by a VCO (Voltage Controlled Oscillator) of "2 to the nth power" Hz, and the time information given from the outside is used. Realize a synchronous sending system clock. In addition, the entire signal processing system is operated in synchronization with the NTP system clock of "2 to the nth power" Hz. Further, the output of the transmission system clock is periodically transmitted to the receiver side via the broadcast transmission line as NTP length format time information.

The receiver side receives the time information in the NTP length format via the broadcast transmission line, and reproduces the reception system clock by the PLL system based on the VCO of "2 to the nth power" Hz as in the broadcast transmission system side. As a result, the receiving system clock becomes a clock synchronized with the broadcasting transmitting system side. Further, by operating the signal processing system of the receiver in synchronization with the NTP system clock of "2 to the nth power" Hz, the clock synchronization between the broadcast transmission system side and the receiver side is realized, and stable signal reproduction is possible. It becomes. Further, the decoding time and the presentation time for each presentation unit of the video / audio signal are set on the broadcast transmission system side based on the time information in the NTP format. Here, the MPU time stamp descriptor shown in FIG. 15B described above is stored in the MPT stored in the PA message transmitted by the broadcast signal. The "mpu_sequence_number (MPU sequence number)" parameter in the MPU time stamp descriptor of FIG. 15B indicates the sequence number of the MPU that describes the time stamp, and the "mpu_presentation_time (MPU presentation time)" parameter sets the MPU presentation time to 64-bit NTP. It is shown in time stamp format. Therefore, the receiver can refer to the MPU time stamp descriptor stored in the MPT and control the presentation (display, output, etc.) timing of each MPU such as video signal, audio signal, subtitle, and character superimpose. ..

When focusing on the decoding timing and the control of the presentation timing for each presentation unit of the above-mentioned video / audio signal, the video / audio signal is synchronized even with a clock of about "2 to the 16th power" Hz (about 65.5 KHz). Can be secured, and in this case, the lower 16 bits of the NTP time stamp format described in the MPU time stamp descriptor or the like need not be referred to. That is, when a "2 mth" Hz clock generated by dividing the NTP system clock by dividing the decoding timing and the presentation timing is used, the NTP time stamp format described in the MPU time stamp descriptor or the like is used. The lower "32-m" bit does not have to be referenced. Therefore, the lower "32-m" bit of the NTP time stamp format described in the MPU time stamp descriptor or the like may be fixed to "0" or "1".

<Simulcast switching>
In this method, as described in the first embodiment, it is possible to make the 4K broadcast and the 2K broadcast in the same physical channel simulcast. If it becomes difficult to receive, demodulate, or display 4K broadcasts for some reason (for example, a defect in the control information of 4K broadcasts), you may switch to 2K simulcasts automatically or manually as a backup. .. If the situation is further improved and 4K broadcasting can be received, it is possible to switch to 4K simulcast automatically or manually. Switching is smooth within the same physical channel. Further, the simulcast may be an IP simulcast (internet broadcast) through a network (communication transmission line). In the case of Internet broadcasting, when it becomes possible to receive broadcasting by radio waves, it is desirable to promptly switch to receiving by radio waves in order to alleviate network traffic congestion.

If there are multiple options for simulcast as a backup, they may be automatically switched in a predetermined order of priority. For example, if it becomes difficult to receive 4K broadcasting for some reason while watching 4K broadcasting transmitted on the broadcasting transmission line, switching to simulcasting of 2K broadcasting transmitted on the same physical channel of the broadcasting transmission line is performed. The first priority may be given, and switching to simulcast via the communication network may be processed as the second priority. In general, broadcasting reception via a broadcasting transmission line can be switched at a higher speed than reception of IP broadcasting via a communication transmission line. It can be said that it is preferable to lower the priority of switching the transmission to simul broadcasting. Further, as another processing example of switching to simulcast when there are a plurality of options for simulcast as a backup, the user may be shown the options and manually selected. Further, the backup may be VOD (Video On Demand) content. When switching to VOD, it is desirable to play from the middle of the VOD content so that the viewing content continues. FIG. 16 shows an example in which the banner display 40020 displays the switching option to simulcast (alternative broadcasting) when the reception state of 4K broadcasting deteriorates. FIG. 16 shows an example in which pressing the blue button on the remote controller switches to terrestrial digital 2K broadcasting, which is a simulcast within the same physical channel, and pressing the red button switches to Internet broadcasting having the same content. The content switching option presentation and the selection may be performed by the mobile information terminal 700 on which the application linked with the broadcast receiving device 100 is operating (FIG. 17). In any of the above cases, the presentation of content switching options may be limited to the options available at that time.

Further, when the reception condition of the 4K broadcast deteriorates during the recording of the 4K broadcast, the recording may be continued by switching to the 2K broadcast of the simulcast. When recording a 2K broadcast from the middle of the backup, the 2K video may be up-converted to a 4K video and recorded in order to make the video format continuous.

In this way, if simulcast is performed within the same physical channel, program switching due to changes in reception conditions can be performed more smoothly. In addition, when combined with Internet broadcasting, backup options will expand.

<Broadcast during emergency broadcasting>
In the system of advanced digital broadcasting service, when simulcasting of 4K broadcasting and 2K broadcasting is performed, in case of emergency, the transmitting side broadcasts the simulcasting 4K broadcasting and 2K broadcasting, respectively. You may switch to. Further, on the transmitting side, only 2K broadcasting may be switched to emergency broadcasting. When switching between 4K broadcasting and 2K broadcasting, which are simulcasts on the transmitting side, to emergency broadcasting, or when switching only 2K broadcasting to emergency broadcasting on the transmitting side, the broadcast program of 4K broadcasting is viewed on the broadcast receiving device ( (Reception and display) You may forcibly switch to viewing (reception and display) of the 2K broadcast screen (emergency broadcast program). The switching process can be performed based on the emergency warning information or the like received via the 4K broadcast. 2K broadcasting, which is technically easier than technically advanced 4K broadcasting, is more likely to be a stable broadcast, and it is more reliable and urgent for viewers to preferentially receive and display 2K broadcasting in an emergency. Information can be transmitted. Further, after switching to emergency broadcasting in the broadcast receiving device, it may be possible to switch to 4K broadcasting which is not emergency broadcasting at the discretion of the viewer. Further, during an emergency broadcast in which one of the 4K broadcast and the 2K broadcast, which is related to the simulcast, is being broadcast, switching to the other broadcast, which is not an emergency broadcast, may be prohibited.

Furthermore, if you have switched to Internet broadcasting, which is a communication transmission line, and are watching, at the same time as the start of emergency broadcasting, you will be forced to watch the broadcast that has been switched to emergency broadcasting among the radio waves that are broadcasting transmission lines. You may switch to. In particular, when the emergency broadcast is transmitted in a plurality of different truss port stream formats, it is possible to forcibly switch to viewing the MPEG2-TS system emergency broadcast that can be received more stably.

By switching to the forced emergency broadcasting described above, emergency information can be reliably transmitted to the viewer.

<Standby synchronization>
As described above, when the content is switched depending on the reception status of the broadcast, the simulcast is switched to another simulcast due to the deterioration of the reception status, and the original simulcast is restored by the improvement of the reception status. .. At this time, if the 4K broadcast is the MMT system and the 2K broadcast is the MPEG2-TS system, the switching between the simulcasts is the switching between the MMT system and the MPEG2-TS system. Switching between simulcasts is different from normal channel selection, and since the programs have the same content, it is desirable that the interruption at the time of switching be as short as possible. For this reason, the current viewing (display) of the MMT 4K broadcast and the MPEG2-TS 2K broadcast so that the program can be displayed or recorded, but not displayed, can be displayed or recorded promptly. The clock counter (40001 or 40002) of the corresponding method may be synchronized for the simulcast that is not used (standby synchronization). In this way, the interruption time of the video can be shortened or the interruption can be eliminated as compared with the case where the standby synchronization is not performed. When standby synchronization is not performed, synchronization of the internal clock is started or restarted at the start of display or recording using the corresponding internal clock (40001 or 40002). In this case, it takes time to establish the synchronization of the internal clock counter (40001 or 40002).

Further, the standby synchronization may be performed at all times in a state where the time information of NTP used in the MMT method or PCR used in the MPEG2-TS method can be received, or may be performed when switching is predicted. For example, during reception of a 4K broadcast, when the reception condition of the 4K broadcast deteriorates and it is predicted that it will be difficult to continue the reception, the PCR clock counter 40002 uses the PCR of the corresponding 2K simulcast. You may start standby synchronization. In addition, when the deteriorated reception status of 4K broadcasting is recovered and it is predicted that reception will be resumed, the NTP clock counter 40001 will be used using the NTP of the 4K broadcasting that wants to resume viewing. You may start the standby synchronization of.

When the reception status of 4K broadcast is restored after switching to 2K simulcast due to the deterioration of the reception status, the synchronization of the NTP clock counter 40001 is quickly restored in the standby synchronization mode. It is possible to quickly return to 4K broadcasting. The return to 4K broadcast may be performed automatically when the reception condition is improved, or it is possible to return to 4K broadcast after the synchronization of the NTP clock counter is restored while watching the backup 2K broadcast. You may notify the viewer and wait for the return instruction.

When recording 4K broadcasts, if you switch to 2K broadcasts of simulcasts and continue recording due to deterioration of reception status of 4K broadcasts, if you set the standby synchronization mode, you can switch to 2K broadcasts or 4K. When returning to 4K broadcast recording as the broadcast reception status recovers, the internal clock counter (40001 or 40002) is synchronized before switching, so the video interruption time can be shortened or eliminated. it can.

By performing standby synchronization of the system clock in this way, it is possible to improve the viewing environment when switching across transmission methods.

<Leap second adjustment>
Unlike PCR, the time system by NTP is an absolute time, and leap second adjustment occurs. The leap second can be adjusted by inserting the leap second into the NTP time on the broadcasting side or deleting the leap second from the NTP time on the broadcasting side. When the leap second is inserted, 8:59:59 continues for 2 seconds, and when the leap second is deleted, 1 second after 8:59:58 becomes 9:00:00.

In the broadcast receiving device 100, while the NTP system clock in the receiver (NTP clock counter 40001 in FIG. 13) is being used (referred to as viewing in this embodiment) by display or recording, the leap second adjustment of the NTP system clock is reflected. Either of the two methods is used as the method.

(1) Adjustment operation 1
The leap second adjustment on the broadcasting side is reflected in the NTP system clock in the receiver by synchronizing with the received NTP time as it is. That is, when the leap second is adjusted, 8:59:59 continues for 2 seconds when the leap second is added, and 8:59:59 does not exist when the leap second is deleted. It becomes.

(2) Adjustment operation 2
The adjustment operation 2 is an adjustment operation different from the adjustment operation 1. In the adjustment operation 2, even if the leap second is adjusted on the broadcasting side, the leap second adjustment is not reflected as the NTP system clock in the receiver, and the leap second is independently continuously executed every second. To do. As a result, time duplication and time discontinuity do not occur in the receiver at the moment of leap second adjustment. Therefore, after adjusting the leap second on the broadcasting side, there is a difference of 1 second between the NTP time transmitted by the broadcast wave and the NTP system clock in the receiver. This state is continued until a predetermined operation such as channel selection operation or simulcast switching is executed, during which the NTP time and the NTP system clock in the receiver remain deviated by 1 second, and the leap second adjustment on the broadcasting side is performed. It will not be reflected. In this state, the NTP system clock in the receiver may be in a so-called free-run state in which the NTP system clock is not synchronized with the NTP time.

Further, the NTP time and the NTP system clock in the receiver may be left in a state of being deviated by 1 second in seconds, and may be continued in a state of being synchronized in units of less than 1 second. After that, when the above-mentioned predetermined operation is executed, the adjustment of the leap second of the NTP time may be reflected in the NTP system clock in the receiver (the deviation of 1 second may be eliminated). By doing so, it is possible to prevent duplication or discontinuity of the NTP system clock time in the receiver during viewing by the user, and to prevent the user from being presented with image distortion or the like based on these. The predetermined operation may include a switching operation to the full-screen EPG display. The same effect can be obtained by including another operation of switching from the video decoding screen of the MMT using the NTP system clock in the receiver to another screen in the above-mentioned predetermined operation. If the in-receiver NTP system clock is no longer used after channel selection or simulcast switching and the above-mentioned standby synchronization is not performed, the NTP time and the in-receiver NTP system clock may not be synchronized in the first place. good.

Next, a case where the leap second adjustment of the NTP system clock in the receiver is performed when the NTP system clock in the receiver is not used (referred to as standby in this embodiment) will be described. This case is a case where the above-mentioned standby synchronization is performed in preparation for the start of displaying the MMT content and the start of recording. At this time, since it is desirable that the NTP system clock in the receiver is always synchronized with the NTP time in preparation for the start of use, the above-mentioned adjustment operation 1 is performed.

The broadcast transmission system transmits information for leap second adjustment (information indicating the type of leap second adjustment processing) as a descriptor "time_leap_indicator" together with information to be presented, and the broadcast receiving device 100 transmits the information for the leap second adjustment. The NTP system clock in the receiver is adjusted based on the information for this purpose. The value set in "time_leap_indicator" is the time when the information to be presented is presented in Japanese time when the system clock of the sending system is adjusted in seconds. 1 in the case of the first 8:59:59 am on the day when the second is inserted, and 8:59:58 am on the day when the second is deleted from 9:00 am on the day before the deletion date. If it is a stand, it indicates 2, and in other cases, it indicates 0.

Depending on the value of the descriptor for adjusting the leap second and the value of the NTP system clock in the receiver, the leap second correction state can be classified into several states as follows.
a: Leap second correction within 24 hours (descriptor value is 1 or 2)
b: No leap second correction within 24 hours (descriptor value is 0)
c: Leap second adjustment of the NTP system clock in the receiver completed (synchronous state)
d: 8:59:59, the second second when the time is added e: Asynchronous state (advance)
f: Asynchronous state (delay)

Here, the states c to f are the states immediately after the leap second correction time, and usually the leap second correction does not occur frequently, so they are also the states b. Together with these states, the leap second adjustment operation in the NTP system clock in the receiver is shown in FIGS. 18A and 18B. FIG. 18A is a case where the time is added, and FIG. 18B is a case where the time is deleted. The case where the leap second adjustment is performed during viewing and the case where the leap second adjustment is performed during standby are shown. In addition to channel selection, "channel selection, etc." represents a predetermined event such as switching to simulcast, processing for changing the service being viewed by turning on the power, switching to full-screen EPG display, and the like. , The states after that are shown assuming that the clock synchronization operation is being performed. Furthermore, the time and time width of "channel selection, etc." are merely examples.

As shown in FIGS. 18A and 18B, not only the adjustment operation 1 but also the adjustment operation 2 may be adopted during viewing. When the adjustment operation 2 is performed, the NTP time of the transmission system and the time of the NTP system clock in the receiver are different from each other. Since the "mpu_presentation_time" descriptor, which is the presentation time based on the time of the transmission system, is set in the MPU of video, etc., the value of this descriptor is set to match the time of the NTP system clock in the receiver. Correct at 100. On the other hand, during standby, it is not necessary to consider the influence on the user's viewing, so the adjustment operation 1 may be adopted. Therefore, in the broadcast receiving device 100 that employs the adjusting operation 2 as the adjusting operation during viewing, when the leap second is adjusted on the broadcasting station side, the broadcast receiving device 100 reproduces using the NTP system clock in the receiver. When the program is being watched, the adjustment operation 2 is performed, and when the program to be reproduced using the NTP system clock in the receiver is in the standby state where the program is not being watched, the adjustment operation 1 is performed. In this way, the leap second adjustment can be performed quickly while preferably reducing the influence on the user's viewing.

<Processing when there are multiple types of leap second adjustment descriptors>
In the above, the leap second adjustment descriptor "time_leap_indicator" is one type, but a plurality of types of descriptors may be provided according to the type of information to be presented. For example, one type (“reference_start_time_leap_indicator”) for displaying subtitles and one type (“mpu_presentation_time_leap_indicator”) for presenting video / audio may be provided.

When different in-receiver NTP system clocks are used for displaying each content, the leap second adjustment of the in-receiver NTP system clock is performed using the corresponding leap second adjustment descriptors. For example, one type of in-receiver NTP system clock is provided for presenting video / audio, and one type of in-receiver NTP system clock is separately provided for displaying subtitles. At this time, as a general rule, the NTP system clock in the receiver for presenting video / audio may use "mpu_presentation_time_leap_indicator" as a leap second adjustment descriptor. Further, as a general rule, the in-receiver NTP system clock for presentation for displaying subtitles may use "reference_start_time_leap_indicator" as a leap second adjustment descriptor.

On the other hand, the NTP system clock in the receiver may be shared by one. The leap second adjustment descriptor value should be the same regardless of the type of information to be presented, so use any leap second adjustment descriptor to adjust the leap second of the NTP system clock in the receiver. Is also good.

However, as long as the types are separated, there is a possibility that the values of these leap second adjustment descriptors will differ depending on the type due to some malfunction of the sending system. In that case, one method is to follow the value of the leap second adjustment descriptor corresponding to the information for which the accuracy of presentation synchronization is required in the broadcast receiving device. In this case, priority may be given to "mpu_presentation_time_leap_indicator" for presenting video / audio, and the descriptor may be used for subtitle display which is a presentation process other than video / audio.

Also, considering the complexity of the processing on the sending system side, the leap second adjustment descriptor corresponding to simpler information is less likely to have an incorrect value, so it is one way to follow that descriptor. The method. In this case, priority is given to "reference_start_time_leap_indicator".

Further, the information of the leap second adjustment descriptor may be obtained after the leap second correction is performed and before the leap second correction is performed, and if the information is accurate, the leap second correction is performed. When the value becomes, the value does not change until the leap second correction is executed. Therefore, it is also effective to monitor the value of the leap second adjustment descriptor regardless of the type and process the value that appears most frequently among the monitored values as an accurate value.

The time management method described above enables quick display switching and accurate display control.

(Example 3)
[Time management method for content management]
In this embodiment, an example of a time management method used for program guide generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, and the like will be described. In addition, in order to simplify the explanation, only the points different from the first embodiment will be described below in this embodiment. Since the points not mentioned in this embodiment are the same as those in the first embodiment, the repeated description will be omitted.

The broadcast receiving device of this embodiment has two types of time management functions. The first time management function is a time management function based on NTP or PCR, and is used for controlling content decoding and presentation synchronization as described in the above-described embodiment. The second time management function is the time managed by "Time_Offset_Table", and is used for program guide generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, and the like. The time information of "Time_Offset_Table" is transmitted by the TOT shown in FIG. 9B in the MPEG2-TS system and by the MH-TOT (MH-Time_Offset_Table) shown in FIG. 10F in the MMT system. Since the same information is transmitted in both cases, TOT in the MPEG2-TS method and MH-TOT in the MMT method are collectively referred to as TOT in the following examples when no particular distinction is required.

As described in the previous embodiment, since NTP and PCR are used for content presentation synchronization, it was possible to manage the time of less than a second, but the information transmitted by the TOT is as follows. It is assumed that the broadcast receiving device 100 can acquire the current date and the Japanese standard time by TOT. FIG. 19A shows an example of the data structure of TOT. The broadcast receiving device 100 can acquire the current date and the current time from the "JST_time" parameter of the TOT. As shown in FIG. 19B, the "JST_time" parameter has the lower 16 bits of the coded data of the current date by the modified Julian Date (MJD) and the Japanese standard time (Japan Standard Time: JST), which is 6-4. It is assumed to include 24-bit information represented by Bit Binary-Coded Decimal (BCD). The current date can be calculated by performing a predetermined operation on the 16-bit coded data of the MJD. The 6 4-bit 2-evolved decimal numbers represent "hours" in 2 decimal digits by 2 4-bit 2-evolved decimal numbers, and the following 2 4-bit 2-evolved decimal numbers are used to represent "hours" in decimal notation 2. The digits represent "minutes", and the last two 4-bit 2-evolved decimal numbers represent "seconds" in two decimal digits.

In the broadcast receiving device 100 of the present embodiment, the time management function based on "JST_time" including the 24-bit information represented by the six 4-bit binary coded decimal numbers of the TOT is provided to the user by presenting the current time or processing. Used for each process that handles the event information table. The event information table is transmitted by the EIT shown in FIG. 9B in the MPEG2-TS system and by the MH-EIT (MH-Event_Information_Table) shown in FIG. 10F in the MMT system. Since both transmit information having the same structure, EIT in the MPEG2-TS system and MH-EIT in the MMT system are collectively referred to as EIT in the following examples when no distinction is required. .. An example of the data structure of this EIT is shown in FIG. “Start_time” in FIG. 20 is the start time of the event and is stored in the same format as in FIG. 19B. In addition, "duration_time" in FIG. 20 is the duration of the event, which is 24-bit information represented by 6 4-bit binary coded decimal numbers, and is "hour", "minute", and "second" in decimal notation. It is stored in the format of.

In general, in the process of presenting the current time to the user in the broadcast receiving device, accuracy of less than a second is rarely required. Further, each time information described in the EIT has good consistency with the format of the time information in the TOT as described above. Specifically, the process using EIT includes a program guide generation process, a control of recording reservation and viewing reservation, and a copyright management process such as temporary storage. It is rare that any processing requires accuracy of less than seconds, and accuracy of 1 second unit is sufficient. In this way, using the required accuracy of time management and the time management function based on TOT in consideration of the data format for the present time presentation processing and each processing using EIT leads to cost reduction by eliminating waste of processing.

Here, in the broadcast receiving device 100 of the present embodiment, both the MPEG2-TS system program and the MMT system program may be received by one physical channel. At this time, the TOT can receive the TOT of the MPEG2-TS system and the MH-TOT of the MMT system, but uses the TOT of the program being viewed.

<Example of modification of time management by TOT>
However, considering that the MPEG2-TS system 2K program and the MMT system 4K program are simulcasts, and the reception status of the 4K program deteriorates for some reason, the program may be switched to the 2K program as a backup. Regardless of whether or not the program is being watched, the time of the broadcast receiver 100 may be managed by using the TOT transmitted by the more stable MPEG2-TS method.

Furthermore, when switching to viewing VOD content via the Internet as backup content, the cause is deterioration of the reception status of 4K programs in the first place, so the MPEG2-TS method is used as the TOT used for time management of the broadcast receiver 100. It is preferable to use the transmitted TOT. While watching a 4K program, the time may be managed by the MH-TOT transmitted by the MMT method, and after switching to viewing the backup VOD content, the time may be managed by the TOT transmitted by the MPEG2-TS method. ..

As described above, more stable time management can be realized by using the TOT transmitted by the MPEG2-TS method, which can be received more stably on the physical channel being received, for the time management of the broadcast receiving device 100. it can.

According to the system of the advanced digital broadcasting service having some or all the functions of each function according to the embodiment of the present invention described above, more advanced advanced digital in consideration of compatibility with the current digital broadcasting service. It becomes possible to provide transmission technology and reception technology for broadcasting services. That is, it is possible to provide a technique for more preferably transmitting or receiving an advanced digital broadcasting service.

Although the examples of the embodiments of the present invention have been described above with reference to Examples 1 to 3, the configuration for realizing the technique of the present invention is not limited to the above-mentioned Examples, and various modified examples can be considered. For example, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. All of these belong to the scope of the present invention. In addition, numerical values and messages appearing in sentences and figures are merely examples, and the effects of the present invention may not be impaired even if different ones are used.

The above-mentioned functions of the present invention and the like may be realized by hardware, for example, by designing a part or all of them by an integrated circuit. Further, it may be realized by software by interpreting and executing an operation program in which the microprocessor unit or the like realizes each function or the like. Hardware and software may be used together.

The software that controls the broadcast receiving device 100 may be stored in the ROM 103 and / or the storage unit 110 of the broadcast receiving device 100 in advance at the time of product shipment. After the product is shipped, it may be acquired from another application server 500 or the like on the Internet 200 via the LAN communication unit 121. Further, the software stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 124 or the like. Similarly, the software that controls the mobile information terminal 700 may be stored in the ROM 703 and / or the storage unit 710 of the mobile information terminal 700 in advance at the time of product shipment. After the product is shipped, it may be acquired from another application server 500 or the like on the Internet 200 via the LAN communication unit 721 or the mobile telephone network communication unit 722 or the like. Further, the software stored in the memory card, the optical disk, or the like may be acquired via the expansion interface unit 724 or the like.

In addition, the control lines and information lines shown in the figure indicate what is considered necessary for explanation, and do not necessarily indicate all the control lines and information lines on the product. In practice, it can be considered that almost all configurations are interconnected.

100: Broadcast receiver, 101: Main control unit, 102: System bus, 103: ROM, 104: RAM, 110: Storage (storage) 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, 200T, 200L, 200B: Antenna, 300, 300T, 300L: Radio tower, 400C: Cable TV station headend, 400: Broadcast station server, 500 : Service provider server, 600: Mobile telephone communication server, 600B: Base station, 700: Mobile information terminal, 800: Internet, 800R: Router device.

Claims (2)

It is a time management method in a broadcast receiving device that manages time using NTP transmitted from a broadcast transmission system.
A synchronization step of synchronizing the NTP system clock in the receiver using the NTP transmitted from the broadcast transmission system, and
A control step for controlling the NTP system clock in the receiver, and
With
In the control step,
When the leap second is adjusted in the NTP transmitted from the broadcast transmission system, the broadcast receiving device determines whether or not a program to be played using the NTP system clock in the receiver is being viewed. , The operation of the reflection processing of the leap second adjustment in the NTP system clock in the receiver is different.
Time management method. In the time management method according to claim 1,
In the control step,
When the leap second is adjusted in the NTP transmitted from the broadcast transmission system, the broadcast receiving device determines whether or not a program to be played using the NTP system clock in the receiver is being viewed. , The timing to reflect the leap second adjustment in the NTP system clock in the receiver is different.
Time management method.

Images