JP6668550B2 - Display control method - Google Patents

Description

  The present invention relates to a display control method.

  One of the extended functions of the digital broadcast service is a data broadcast that transmits digital data by broadcast waves and displays various information such as a weather forecast, news, and recommended programs. Many television receivers capable of receiving data broadcasting are already on the market, and many techniques relating to data broadcasting reception are disclosed, including Patent Document 1 below.

JP 2001-186486 A

  In response to recent environmental changes in content distribution, television receivers are also required to have various function extensions. In particular, there are many requests for distribution of contents and cooperative applications using a broadband network environment such as the Internet, and requests for higher resolution / higher definition of video contents. However, it is difficult to provide a high-value-added television receiver that can meet the above demand only by using the data broadcasting reception function or the like of the current television receiver alone or by simply expanding the function of the data broadcasting reception function or the like. .

  An object of the present invention is to provide a broadcast receiving apparatus capable of executing a function with higher added value.

  The technology described in the claims is used as means for solving the problem.

  An example is a display control method executed in a broadcast system including a transmitting device that transmits an IP data flow via a broadcast transmission path and a broadcast receiving device that receives the IP data flow, wherein the transmitting device Transmitting an IP data flow in which program content and transfer characteristic information relating to a dynamic range of a video signal of the program content are stored in an MMT format; and receiving the broadcast receiving device receiving the IP data flow. Step, the broadcast receiving device refers to the transfer characteristic information received in the receiving step, which is obtainable without reference to a video encoded stream of the program content, and according to the transfer characteristic information, A display control step of performing a display control process of controlling display of the program content, The display control step determines whether the program content is HDR content or SDR content and the type of gamma correction of a video signal of the program content based on a value indicated by the transfer characteristic information. In the control of the switching between the HDR content and the SDR content of the program content in the display of the content in the above, the switching between the HDR content and the SDR content in the decoding process of the program content and the video process subsequent to the decoding process are performed. In this case, the video processing corresponding to the display transfer characteristics of the HDR content and the SDR content is switched. When the program content switches from the HDR content to the SDR content, and when the program content switches from the SDR content to the HDR content. In either case, the black display is started before the decoding of the content before switching ends, and the black display ends after the decoding of the content after switching starts. Regarding the control of the switching timing between the HDR content and the SDR content in the decoding process of the program content and the timing of the switching of the video processing corresponding to the respective display transfer characteristics of the HDR content and the SDR content, the start of both is as described above. After the start of the black display, control is performed such that the completion of both ends before the end of the black display. In the control, the completion timing of switching between the HDR content and the SDR content in the decoding process of the program content And HDR content and SDR content The timing may be before or after the completion timing of the switching of the video processing corresponding to the respective display transfer characteristics of the contents.

  By using the technology of the present invention, it is possible to provide a broadcast receiving device that can execute a function with higher added value.

FIG. 1 is a system configuration diagram illustrating an example of a broadcast communication system including a broadcast receiving device according to a first embodiment. FIG. 3 is an explanatory diagram of an outline of a coded signal in MMT. FIG. 3 is a configuration diagram of an MPU in the MMT. FIG. 3 is a configuration diagram of an MMTP packet in MMT. FIG. 3 is a conceptual diagram of a protocol stack of a broadcast system using MMT. FIG. 3 is a diagram illustrating a hierarchical configuration of control information used in a broadcasting system. 4 is a list of tables used in the TLV-SI of the broadcasting system. 4 is a list of descriptors used in the TLV-SI of the broadcast system. 4 is a list of messages used in the MMT-SI of the broadcast system. 3 is a list of tables used in the MMT-SI of the broadcasting system. 3 is a list (No. 1) of descriptors used in the MMT-SI of the broadcast system. It is a list (the 2) of the descriptor used by MMT-SI of a broadcasting system. FIG. 3 is a diagram illustrating a relationship between data transmission of a broadcasting system and each table. FIG. 2 is a block diagram of the broadcast receiving device according to the first embodiment. FIG. 3 is a configuration diagram of a logical plane structure of a presentation function of the broadcast receiving device according to the first embodiment. FIG. 2 is a system configuration diagram of clock synchronization / presentation synchronization of the broadcast receiving device according to the first embodiment. FIG. 3 is a software configuration diagram of the broadcast receiving device according to the first embodiment. FIG. 2 is a block diagram of a broadcast station server according to the first embodiment. FIG. 3 is a block diagram of a service provider server according to the first embodiment. FIG. 2 is a block diagram of the portable information terminal according to the first embodiment. FIG. 2 is a software configuration diagram of the portable information terminal according to the first embodiment. It is a figure showing the data structure of MH-TOT of a broadcasting system. It is a figure showing the format of the JST_time parameter of a broadcasting system. FIG. 5 is a diagram illustrating a method of calculating a current date from MJD of the broadcast receiving device according to the first embodiment. FIG. 2 is a diagram illustrating a configuration of an NTP format of a broadcast system. FIG. 3 is a diagram illustrating a data structure of an MPU time stamp descriptor of the broadcasting system. It is a figure which shows the data structure of the time information of the TMCC extended information area | region of a broadcasting system. FIG. 5 is an operation sequence diagram of the broadcast receiving apparatus according to the first embodiment at the time of channel scanning. FIG. 3 is a diagram illustrating a data structure of TLV-NIT of the broadcast system. It is a figure showing the data structure of the satellite distribution system descriptor of a broadcasting system. It is a figure showing the data structure of the service list descriptor of a broadcasting system. It is a figure showing the data structure of AMT of a broadcasting system. FIG. 5 is an operation sequence diagram of the broadcast receiving apparatus according to the first embodiment when selecting a channel. FIG. 3 is a diagram illustrating a data structure of an MPT of a broadcast system. It is a figure showing the data structure of LCT of a broadcasting system. FIG. 11 is a diagram illustrating an example of layout assignment to layout numbers based on LCT. FIG. 11 is a diagram illustrating an example of layout assignment to layout numbers based on LCT. FIG. 11 is a diagram illustrating an example of layout assignment to layout numbers based on LCT. FIG. 11 is a diagram illustrating an example of layout assignment to layout numbers based on LCT. FIG. 9 is a diagram illustrating an operation of exception processing of screen layout control based on LCT. FIG. 9 is a diagram illustrating an operation of exception processing of screen layout control based on LCT. It is a figure showing the data structure of MH-EIT of a broadcasting system. FIG. 4 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment. FIG. 4 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment. FIG. 4 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment. FIG. 5 is a screen display diagram when the broadcast receiving apparatus according to the first embodiment displays an emergency alert broadcast. FIG. 9 is a block diagram of a broadcast receiving device according to a second embodiment. FIG. 7 is a diagram for explaining inconsistency in present time display when a broadcast service is switched. FIG. 14 is a diagram illustrating an operation of selection control of a current time information reference source according to the second embodiment. FIG. 14 is an operation sequence diagram of a process of updating current time information according to the second embodiment. FIG. 14 is a screen display diagram of an EPG screen of the broadcast receiving device according to the second embodiment. FIG. 14 is a screen display diagram of an EPG screen of the broadcast receiving device according to the second embodiment. FIG. 11 is a system configuration diagram of a broadcast communication system according to a third embodiment. FIG. 3 is a diagram illustrating a data structure of a content information descriptor of the broadcasting system. FIG. 4 is a diagram for describing the meaning of a content type in a content information descriptor of a broadcast system. FIG. 3 is a diagram illustrating the meaning of source device primary color chromaticity coordinates and source device white chromaticity coordinates in a content information descriptor of a broadcast system. FIG. 3 is a diagram illustrating the meaning of EOTF identification in a content information descriptor of a broadcast system. FIG. 14 is a screen display diagram of an EPG screen of the broadcast receiving device according to the third embodiment. FIG. 3 is a diagram illustrating a color gamut shift between a source device and a monitor device. FIG. 14 is a diagram illustrating a color gamut conversion process of the broadcast receiving device according to the third embodiment. FIG. 14 is a diagram illustrating a color gamut conversion process of the broadcast receiving device according to the third embodiment. FIG. 14 is a diagram illustrating image quality adjustment items of the broadcast receiving device according to the third embodiment. FIG. 14 is a diagram illustrating a brightness level conversion process of the broadcast receiving device according to the third embodiment. FIG. 14 is a diagram illustrating a brightness level conversion process of the broadcast receiving device according to the third embodiment. FIG. 14 is a system configuration diagram of a broadcast communication system according to a fourth embodiment. FIG. 14 is a block diagram of a broadcast receiving device according to a fourth embodiment. FIG. 14 is a software configuration diagram of a broadcast receiving device according to a fourth embodiment. FIG. 14 is an interface configuration diagram between a broadcast receiving device and a monitor device according to a fourth embodiment. FIG. 14 is a diagram illustrating mastering information output by a broadcast receiving device according to a fourth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Example 1)

[System configuration]
FIG. 1 is a system configuration diagram illustrating an example of a broadcast communication system including the broadcast receiving device according to the present embodiment. The broadcast communication system according to the present embodiment includes a broadcast receiving apparatus 100 and an antenna 100a, a broadband network such as the Internet 200, a router apparatus 200r and an access point 200a, a broadcast tower 300t and a broadcast satellite (or communication satellite) 300s, and a broadcast station. It comprises a server 300, a service provider server 400, other application servers 500, a mobile telephone communication server 600, a base station 600b of a mobile telephone communication network, and a portable information terminal 700.

  The broadcast receiving apparatus 100 receives the broadcast wave transmitted from the radio tower 300t via the broadcast satellite (or communication satellite) 300s and the antenna 100a. Alternatively, the broadcast wave transmitted from the radio tower 300t may be directly received from the antenna 100a without passing through the broadcast satellite (or communication satellite) 300s. The broadcast receiving device 100 can be connected to the Internet 200 via the router device 200r, and can transmit and receive data by communication with each server device and other communication devices on the Internet 200.

  The router device 200r is connected to the Internet 200 by wire communication, is connected to the broadcast receiving device 100 by wire communication or wireless communication, and is connected to the portable information terminal 700 by wireless communication. The wireless communication may use a method such as Wi-Fi (registered trademark). This allows each server device and other communication devices on the Internet 200, the broadcast receiving device 100, and the portable information terminal 700 to mutually transmit and receive data via the router device 200r. The communication between the broadcast receiving device 100 and the portable information terminal 700 may be performed directly without using the router device 200r by a method such as BlueTooth (registered trademark) or NFC (Near Field Communication).

  The radio tower 300t is a broadcast facility of a broadcasting station, and transmits broadcast waves including coded data of broadcast programs, caption information, other applications, general-purpose data, and the like. The broadcast satellite (or communication satellite) 300s receives the broadcast wave transmitted from the radio tower 300t of the broadcast station, performs appropriate frequency conversion and the like, and then transmits the broadcast wave to the antenna 100a connected to the broadcast receiving apparatus 100. A repeater that retransmits waves. It is assumed that the broadcasting station includes a broadcasting station server 300. The broadcast station server 300 stores metadata such as a broadcast program (moving image content) and a program title, a program ID, a program outline, performer information, broadcast date and time of each broadcasting program, and stores the moving image content and each metadata. It can be provided to service providers based on a contract. The provision of the moving image content and each metadata to the service provider may be performed through an API (Application Programming Interface) included in the broadcast station server 300.

  The service provider server 400 is a server device prepared by the service provider, and is capable of providing various services associated with a broadcast program distributed from a broadcast station. In addition, the service provider server 400 stores, manages, distributes, and the like the moving image content and metadata provided from the broadcast station server 300 and various contents and applications associated with the broadcast program. In addition, in response to an inquiry from a television receiver or the like, it has a function of searching for a content and an application that can be provided and providing a list. Note that storage, management, and distribution of the content and metadata and storage, management, and distribution of the application may be performed by different server devices. The broadcasting station and the service provider may be the same or different. A plurality of service provider servers 400 may be prepared for different services. Further, the function of the service provider server 400 may be provided by the broadcast station server 300.

  The other application server 500 is a known server device that stores, manages, distributes, and the like, other general applications, operation programs, contents, data, and the like. There may be a plurality of other application servers 500 on the Internet 200.

  The mobile telephone communication server 600 is connected to the Internet 200, while being connected to the portable information terminal 700 via the base station 600b. The mobile phone communication server 600 manages telephone communication (call) and data transmission / reception of the mobile information terminal 700 via the mobile phone communication network, and the mobile information terminal 700 and each server device on the Internet 200 and other communication devices. Data transmission and reception by communication with the Communication between the base station 600b and the portable information terminal 700 is performed by a W-CDMA (Wideband Code Multiple Access) (registered trademark) system, a GSM (Global System for Mobile communications) (registered trademark) system, and an LTE (Telecommunication) communication system. Alternatively, the communication may be performed by another communication method.

  The portable information terminal 700 has a function of telephone communication (call) and data transmission / reception via a mobile telephone communication network, and a function of wireless communication by Wi-Fi (registered trademark) or the like. The portable information terminal 700 can be connected to the Internet 200 via the router device 200r or the access point 200a, or via the mobile phone communication network base station 600b and the mobile phone communication server 600. Can transmit and receive data by communication with each server device and other communication devices. The access point 200a is connected to the Internet 200 by wired communication, and is connected to the portable information terminal 700 by wireless communication. The wireless communication may use a method such as Wi-Fi (registered trademark). The communication between the portable information terminal 700 and the broadcast receiving apparatus 100 is performed via the access point 200a and the Internet 200 and the router 200r or between the base station 600b and the mobile phone communication server 600 and between the Internet 200 and the router 200r. It may be performed via the Internet.

[Overview of MMT method]
The broadcast receiving apparatus 100 shown in FIG. 1 is defined as an MPEG-2 (Moving Picture Experts Group) -2 system, which is widely used in a conventional digital broadcasting system, as a media transport system for transmitting data such as video and audio. Instead of the TS (Transport Stream) (hereinafter referred to as MPEG2-TS), the television receiver is assumed to be compatible with MMT (MPEG Media Transport). A television receiver that can support both MPEG2-TS and MMT may be used.

  MPEG2-TS is characterized in that components such as video and audio constituting a program are multiplexed together with a control signal and a clock into one stream. Since it is handled as one stream including the clock, it is suitable for transmitting one content through one transmission path whose transmission quality is ensured, and has been adopted in many conventional digital broadcasting systems. On the other hand, the MPEG2-TS functions in response to environmental changes related to content distribution, such as recent diversification of content, diversification of devices using the content, diversification of transmission paths for distributing the content, diversification of the content storage environment, and the like. Due to the limitations of MMT, the media transport system newly formulated is MMT.

  FIG. 2A shows an example of an outline of a coded signal in the MMT of the present embodiment. As shown in the figure, the MMT of the present embodiment has an MFU (Media Fragment Unit), an MPU (Media Processing Unit), an MMTP (MMT Protocol) payload, and an MMTP packet as elements constituting an encoded signal. And The MFU is a format at the time of transmitting video, audio, and the like, and may be configured in NAL (Network Abstraction Layer) units or access units. The MPU may be composed of MPU metadata including information on the configuration of the entire MPU, movie fragment metadata including encoded media data information, and sample data that is encoded media data. It is assumed that MFU can be extracted from the sample data. In the case of media such as a video component and an audio component, a presentation time and a decoding time may be specified in MPU units or access units. FIG. 2B shows an example of the configuration of the MPU.

  The MMTP packet is composed of a header portion and an MMTP payload, and transmits MFU and MMT control information. The MMTP payload has a payload header corresponding to the content (data unit) stored in the payload section. FIG. 2C shows an example of an outline of a process of forming an MFU from a video / audio signal, storing the MFU in an MMTP payload, and forming a MMTP packet. In a video signal to be encoded using inter-frame prediction, it is desirable to configure the MPU in GOP (Group Of Pictures) units. When the size of the MFU to be transmitted is small, one MFU may be stored in one payload portion, or a plurality of MFUs may be stored in one payload portion. When the size of the MFU to be transmitted is large, one MFU may be divided into a plurality of payload sections and stored. The MMTP packet may be protected using a technique such as AL-FEC (Application Layer Forward Error Correction) or ARQ (Automatic Repeat Request) in order to recover a packet loss on the transmission path.

  In the broadcasting system of the present embodiment, MPEG-H HEVC (High Efficiency Video Coding) is used as a video encoding system, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Loss) is used as an audio encoding system. Coding). Encoded data such as video and audio of a broadcast program encoded in each of the above methods is in the form of MFU or MPU, is further loaded on an MMTP payload, is converted into an MMTP packet, and is transmitted as an IP (Internet Protocol) packet. And Also, data content related to a broadcast program may be in the form of MFU or MPU, and may be further loaded into an MMTP payload, converted into MMTP packets, and transmitted as IP packets. Data content transmission methods include subtitle / text super-transmission method used for streaming data synchronized with broadcasting, application transmission method used for data transmission asynchronous with broadcasting, and synchronous / asynchronous messages for applications running on a television receiver. It is assumed that four types of event message transmission method used for notification and other general-purpose data transmission methods for transmitting general-purpose data synchronously / asynchronously are prepared.

  For transmission of MMTP packets, UDP / IP (User Datagram Protocol / Internet Protocol) is used in a broadcast transmission path, and UDP / IP or Transmission Control Protocol / Internet Protocol (TCP / IP) is used in a communication line. . In the broadcast transmission path, a TLV (Type Length Value) multiplexing method is used for efficient transmission of IP packets. FIG. 3 shows an example of the protocol stack of the broadcasting system according to the present embodiment. In the figure, (A) is an example of a protocol stack in a broadcast transmission path, and (B) is an example of a protocol stack in a communication line.

  In the broadcasting system of the present embodiment, a mechanism for transmitting two types of control information of MMT-SI (MMT-Signaling Information) and TLV-SI (TLV-Signaling Information) is prepared. MMT-SI is control information indicating the configuration of a broadcast program and the like. It is assumed that the control message is in the form of an MMT, is put on an MMTP payload, is converted into an MMTP packet, and is transmitted as an IP packet. The TLV-SI is control information on multiplexing of IP packets, and provides information for channel selection and information on correspondence between IP addresses and services.

  Also, in a broadcasting system using MMT, time information is transmitted in order to provide absolute time. Note that, whereas the MPEG2-TS indicates the display time of a component based on a different clock for each TS, the MMT indicates the display time of a component based on Coordinated Universal Time (UTC). I do. With these mechanisms, the terminal device can synchronously display components transmitted from different transmission points on different transmission paths. In order to provide UTC, it is assumed that an IP packet in NTP (Network Time Protocol) format is used.

[Control information of broadcast system using MMT]
In the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment, as described above, the control information includes the TLV-SI related to the TLV multiplexing method for multiplexing the IP packet and the MMT that is the media transport method. Prepare the related MMT-SI. The TLV-SI provides information for the broadcast receiving apparatus 100 to demultiplex the IP packet multiplexed on the broadcast transmission path. The TLV-SI includes a “table” and a “descriptor”. The “table” is transmitted in a section format, and the “descriptor” is arranged in the “table”. The MMT-SI is transmission control information indicating information related to the configuration of the MMT package and the broadcasting service. The MMT-SI includes three layers: a “message” storing a “table” and a “descriptor”; a “table” having elements and attributes indicating specific information; and a “descriptor” indicating more detailed information. Shall be. FIG. 4 shows an example of a hierarchical structure of control information used in the broadcasting system of the present embodiment.

<Table used in TLV-SI>
FIG. 5A shows a list of “tables” used in the TLV-SI of the broadcast system supported by the broadcast receiving device 100 of the present embodiment. In the present embodiment, the following table is used as the "table" of the TLV-SI.

(1) TLV-NIT
The network information table for TLV (TLV-NIT) indicates information on a physical configuration of a TLV stream transmitted by the network and characteristics of the network itself.

(2) AMT
An address map table (Address Map Table: AMT) provides a list of multicast groups of IP packets constituting each service transmitted in the network.

(3) Table set by the operator In addition, it is possible to prepare a table that is independently set by the service operator or the like.

<Descriptor used in TLV-SI>
FIG. 5B shows a list of “descriptors” arranged in the TLV-SI of the broadcast system corresponding to the broadcast receiving device 100 of the present embodiment. In the present embodiment, the following is used as the “descriptor” of the TLV-SI.

(1) Service list descriptor The service list descriptor provides a list of services by service identification and service type.

(2) Satellite distribution system descriptor The satellite distribution system descriptor indicates the physical conditions of the satellite transmission path.

(3) System management descriptor The system management descriptor is used to distinguish between broadcast and non-broadcast.

(4) Network name descriptor The network name descriptor describes the network name using character codes.

(5) Descriptor set by the service provider In addition, it is possible to prepare a descriptor independently set by the service service provider or the like.

<Message used in MMT-SI>
FIG. 6A shows a list of “messages” used in the MMT-SI of the broadcast system corresponding to the broadcast receiving device 100 of the present embodiment. In this embodiment, the following “message” of the MMT-SI is used.

(1) PA message The Package Access (PA) message is used to transmit various tables.

(2) M2 section message The M2 section message is used to transmit a section extension format of MPEG-2 Systems.

(3) CA message The CA message is used to transmit a table for identifying a conditional access system.

(4) M2 short section message The M2 short section message is used to transmit a section short format of MPEG-2 Systems.

(5) Data transmission message The data transmission message is a message that stores a table related to data transmission.

(6) Message set by service provider In addition, it is possible to prepare a message uniquely set by a service service provider or the like.

<Table used in MMT-SI>
FIG. 6B shows a list of “tables” used in the MMT-SI of the broadcast system corresponding to the broadcast receiving device 100 of the present embodiment. The table is control information having elements and attributes indicating specific information, and is stored in a message and transmitted by an MMTP packet. Note that the message storing the table may be determined according to the table. In the present embodiment, the following table is used as the “table” of the MMT-SI.

(1) MPT
An MMT Package Table (MMT Package Table: MPT) gives information that configures a package such as a list of assets and a location of the assets on a network. The MPT may be stored in a PA message.

(2) PLT
The package list table (Package List Table: PLT) shows a list of IP data flows and packet IDs transmitting the PA message of the MMT package provided as a broadcast service, and IP data flows transmitting the IP service. The PLT may be stored in a PA message.

(3) LCT
A layout setting table (Layout Configuration Table: LCT) is used to associate layout information for presentation with a layout number. The LCT may be stored in the PA message.

(4) ECM
Entitlement Control Message (ECM) is common information including program information and control information, and delivers key information for descrambling and the like. The ECM may be stored in the M2 section message.

(5) EMM
The Entitlement Management Message (EMM) transmits individual information including contract information for each subscriber and key information for decrypting ECM (common information). The EMM may be stored in the M2 section message.

(6) CAT (MH)
A CA table (Conditional Access Table: CAT) (MH) is used to store a descriptor for identifying a conditional access system. The CAT (MH) may be stored in the CA message.

(7) DCM
The Download Control Message (DCM) transmits key-related information such as a key for decrypting a transmission path encryption for download. The DCM may be stored in the M2 section message.

(8) DMM
The Download Management Message (DMM) transmits key-related information such as a download key for decrypting the DCM. The DMM may be stored in the M2 section message.

(9) MH-EIT
The MH-Event Information Table (MH-EIT) is time-series information on events included in each service. The MH-EIT may be stored in the M2 section message.

(10) MH-AIT
An MH-Application Information Table (MH-Application Information Table: MH-AIT) stores all information related to an application, an activation state required for the application, and the like. The MH-AIT may be stored in the M2 section message.

(11) MH-BIT
An MH-Broadcaster Information Table (MH-BIT) is used for presenting information of a broadcaster existing on a network. The MH-BIT may be stored in the M2 section message.

(12) MH-SDTT
The MH-Software Download Trigger Table (MH-SDTT) is used for download notification information. The MH-SDTT may be stored in the M2 section message.

(13) MH-SDT
The MH-Service Description Table (MH-Service Description Table: MH-SDT) has a sub-table indicating a service included in a specific TLV stream, and information on the organization channel such as the name of the organization channel and the name of the broadcaster. Is transmitted. The MH-SDT may be stored in the M2 section message.

(14) MH-TOT
The MH-Time Offset Table (MH-Time Offset Table) transmits JST time and date (modified Julian date) information. The MH-TOT may be stored in the M2 short section message.

(15) MH-CDT
The MH-Common Data Table (MH-Common Data Table: MH-CDT) is used to transmit common data to be stored in the non-volatile memory in a section format to all receivers receiving the MH-Common Data Table. The MH-CDT may be stored in the M2 section message.

(16) DDM Table A data directory management table (DDM table) provides a directory configuration of files constituting an application in order to separate a file configuration of the application from a configuration for file transmission. The DDM table may be stored in the data transmission message.

(17) DAM Table The Data Asset Management Table (DAM table) provides the configuration of the MPU in the asset and version information for each MPU. The DAM table may be stored in the data transmission message.

(18) DCC Table The data content management table (DCC table) provides file configuration information as data content in order to realize flexible and effective cache control. The DCC table may be stored in the data transmission message.

(19) EMT
An event message table (EMT) is used to transmit information about an event message. The EMT may be stored in the M2 section message.

(20) Table set by the operator In addition, it is possible to prepare a table independently set by the service operator or the like.

<Descriptor used in MMT-SI>
FIG. 6C and FIG. 6D show a list of “descriptors” arranged in the MMT-SI of the broadcast system corresponding to the broadcast receiving device 100 of the present embodiment. The descriptor is control information that provides more detailed information, and is arranged in a table. Note that the table in which the descriptors are arranged may be determined according to the descriptors. In this embodiment, the following “descriptor” of the MMT-SI is used.

(1) Asset Group Descriptor The asset group descriptor provides the group relation of the asset and the priority within the group. The asset group descriptor may be located in the MPT.

(2) Event package descriptor The event package descriptor provides correspondence between an event representing a program and a package. The event package descriptor may be located in the MH-EIT transmitted in the M2 section message.

(3) Background color specification descriptor The background color specification descriptor provides the background color of the rearmost surface in the layout specification. The background color designation descriptor may be located in the LCT.

(4) MPU presentation region designation descriptor The MPU presentation region designation descriptor provides a position at which the MPU is presented. The MPU presentation area designation descriptor may be located in the MPT.

(5) MPU time stamp descriptor The MPU time stamp descriptor indicates the presentation time of the first access unit in the presentation order in the MPU. The MPU timestamp descriptor may be located in the MPT.

(6) Dependency Descriptor The dependency relationship descriptor provides the asset ID of the asset in the dependency relationship. Dependency descriptors may be located in the MPT.

(7) Access control descriptor The access control descriptor provides information for identifying the conditional access system. The access control descriptor may be located in MPT or CAT (MH).

(8) Scramble System Descriptor The scramble system descriptor provides information for identifying the encryption target and the type of encryption algorithm at the time of scrambling. The scrambling scheme descriptor may be located in MPT or CAT (MH).

(9) Message Authentication Method Descriptor The message authentication method descriptor provides information for identifying the message authentication method when performing message authentication. The message authentication scheme descriptor may be located in MPT or CAT (MH).

(10) Emergency information descriptor (MH)
The emergency information descriptor (MH) is used when performing an emergency alert broadcast. The emergency information descriptor (MH) may be located in the MPT.

(11) MH-MPEG-4 audio descriptor The MH-MPEG-4 audio descriptor describes basic information for specifying encoding parameters of an audio stream of ISO / IEC 14496-3 (MPEG-4 audio). Used for The MH-MPEG-4 audio descriptor may be located in the MPT.

(12) MH-MPEG-4 Audio Extension Descriptor The MH-MPEG-4 audio extension descriptor is used to describe the profile and level of the MPEG-4 audio stream and the settings specific to the encoding method. The MH-MPEG-4 audio extension descriptor may be located in the MPT.

(13) MH-HEVC video descriptor The MH-HEVC video descriptor conforms to ITU-T Recommendation H.264. 265 | Used to describe basic encoding parameters of a video stream (HEVC stream) of ISO / IEC 23008-2. The MH-HEVC video descriptor may be located in the MPT.

(14) MH-Link Descriptor The MH-Link Descriptor identifies a service provided when a viewer requests additional information related to a certain thing described in the program arrangement information system. The MH-link descriptor may be located in MPT, MH-EIT, MH-SDT, etc.

(15) MH-Event Group Descriptor The MH-event group descriptor is used when there is a relationship between a plurality of events to indicate that those event groups are grouped. The MH-event group descriptor may be located in the MH-EIT.

(16) MH-Service List Descriptor The MH-service list descriptor provides a list of services by service identification and service type. The MH-service list descriptor may be located in the MH-BIT.

(17) MH-short-form event descriptor The MH-short-form event descriptor represents an event name and a short description of the event in a text format. The MH-short event descriptor may be located in the MH-EIT.

(18) MH-extended event descriptor The MH-extended event descriptor is used in addition to the MH-short event descriptor to provide a detailed description of the event. The MH-extended event descriptor may be located in the MH-EIT.

(19) Video Component Descriptor The video component descriptor indicates parameters and a description related to the video component, and is also used to represent an elementary stream in a character format. The video component descriptor may be located in MPT or MH-EIT.

(20) MH-stream identification descriptor The MH-stream identification descriptor is used to label the component stream of the service and to refer to the description content indicated by the video component descriptor in the MH-EIT by the label. . The MH-stream identification descriptor may be located in the MPT.

(21) MH-content descriptor The MH-content descriptor indicates the genre of the event. The MH-content descriptor may be located in the MH-EIT.

(22) MH-Parental Rate Descriptor The MH-Parental Rate Descriptor indicates the age-based viewing restriction and is used to extend the viewing restriction based on other restriction conditions. The MH-Parental Rate Descriptor may be located in MPT or MH-EIT.

(23) MH-audio component descriptor The MH-audio component descriptor indicates each parameter of the audio elementary stream, and is also used to represent the elementary stream in a character format. The MH-voice component descriptor may be located in the MPT or MH-EIT.

(24) MH-Target Area Descriptor The MH-target area descriptor is used to describe a target area of a program or a part of streams constituting the program. The MH-target area descriptor may be located in the MPT.

(25) MH-series descriptor The MH-series descriptor is used to identify a series program. The MH-series descriptor may be located in the MH-EIT.

(26) MH-SI transmission parameter descriptor The MH-SI transmission parameter descriptor is used to indicate an SI transmission parameter. The MH-SI transmission parameter descriptor may be located in the MH-BIT.

(27) MH-broadcaster name descriptor The MH-broadcaster name descriptor describes the name of the broadcaster. The MH-Broadcaster name descriptor may be located in the MH-BIT.

(28) MH-Service Descriptor The MH-service descriptor represents the organization channel name and the name of the service provider together with the service format type using character codes. The MH-service descriptor may be located in the MH-SDT.

(29) IP Data Flow Descriptor The IP data flow descriptor provides information on the IP data flow constituting the service. The IP data flow descriptor may be located in the MH-SDT.

(30) MH-CA Activation Descriptor The MH-CA activation descriptor describes activation information for activating a CAS program on a CAS base. The MH-CA activation descriptor may be located in MPT or CAT (CA).

(31) MH-Type Descriptor The MH-Type descriptor indicates the type of a file transmitted by the application transmission method. The MH-Type descriptor may be located in a DAM table.

(32) MH-Info descriptor The MH-Info descriptor describes information about an MPU or an item. The MH-Info descriptor may be located in a DAM table.

(33) MH-Expire descriptor The MH-Expire descriptor describes the expiration date of the item. The MH-Expire descriptor may be located in a DAM table.

(34) MH-Compression Type Descriptor The MH-Compression Type descriptor indicates that the item to be transmitted is compressed, and indicates the compression algorithm and the number of bytes of the item before compression. The MH-Compression Type descriptor may be located in a DAM table.

(35) MH-data encoding scheme descriptor The MH-data encoding scheme descriptor is used to identify a data encoding scheme. The MH-Data encoding scheme descriptor may be located in the MPT.

(36) UTC-NPT reference descriptor The UTC-NPT reference descriptor is used to convey the relationship between NPT (Normal Play Time) and UTC. The UTC-NPT reference descriptor may be located in the EMT.

(37) Event message descriptor The event message descriptor conveys information about an event message in general. The event message descriptor may be located in the EMT.

(38) MH-Local Time Offset Descriptor The MH-Local Time Offset Descriptor is used to give a certain offset value between the actual time (for example, UTC + 9 hours) and the display time on the human system at the time of daylight saving time. The MH-Local Time Offset Descriptor may be located in the MH-TOT.

(39) MH-Component Group Descriptor The MH-component group descriptor defines and identifies a combination of components in an event. The MH-component group descriptor may be located in the MH-EIT.

(40) MH-Logo Transmission Descriptor The MH-logo transmission descriptor is used to describe a character string for a simple logo, pointing to a logo in the CDT format, and the like. The MH-logo transmission descriptor may be located in the MH-SDT.

(41) MPU extended time stamp descriptor The MPU extended time stamp descriptor provides the decoding time of the access unit in the MPU. The MPU extension time stamp descriptor may be located in the MPT.

(42) MPU Download Content Descriptor The MPU download content descriptor is used to describe attribute information of content downloaded using the MPU. The MPU download content descriptor may be located in the MH-SDTT.

(43) MH-Network Download Content Descriptor The MH-network download content descriptor is used to describe attribute information of content downloaded using a network. The MH-Network Download Content Descriptor may be located in the MH-SDTT.

(44) MH-Application Descriptor The MH-application descriptor describes application information. The MH-application descriptor may be located in the MH-AIT.

(45) MH-Transmission Protocol Descriptor The MH-transmission protocol descriptor is used to designate a transmission protocol such as broadcasting or communication and to indicate location information of an application depending on the transmission protocol. The MH-Transmission Protocol Descriptor may be located in the MH-AIT.

(46) MH-Simple Application Location Descriptor The MH-Simple Application Location Descriptor is described to indicate the details of the application acquisition source. The MH-simple application location descriptor may be located in the MH-AIT.

(47) MH-Application Boundary Authority Setting Descriptor The MH-application boundary authority setting descriptor is described to set an application boundary and to set the authority of broadcast resource access for each area (URL). The MH-application boundary authority setting descriptor may be located in the MH-AIT.

(48) MH-Startup Priority Information Descriptor The MH-startup priority information descriptor is described to specify the startup priority of the application. The MH-activation priority information descriptor may be located in the MH-AIT.

(49) MH-Cache Information Descriptor The MH-cache information descriptor is described to be used for cache control when resources constituting an application are cached and held when the application is expected to be reused. . The MH-cache information descriptor may be located in the MH-AIT.

(50) MH-probabilistic application delay descriptor The MH-probabilistic application delay descriptor is used to delay application control timing by a stochastically set delay amount, assuming load distribution of server access for acquiring an application. Describe in. The MH-probabilistic application delay descriptor may be located in the MH-AIT.

(51) Link destination PU descriptor The link destination PU descriptor describes another presentation unit that may transition from the presentation unit (PU). The link destination PU descriptor may be arranged in the DCC table.

(52) Lock cache specification descriptor The lock cache specification descriptor describes the specification of a file to be cached and locked in the presentation unit. The lock cache designation descriptor may be located in a DCC table.

(53) Unlock cache specification descriptor The unlock cache specification descriptor describes the specification of a file to be unlocked among files locked in the presentation unit. The unlock cache designation descriptor may be located in the DCC table.

(54) Descriptor set by the operator In addition, it is possible to prepare a descriptor uniquely set by the service operator or the like.

<Relationship between data transmission and each control information in MMT method>
Here, with reference to FIG. 6E, a relationship between data transmission and a representative table in a broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment will be described.

  In the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment, data transmission can be performed through a plurality of paths, such as a TLV stream via a broadcast transmission path 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. Similarly, 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 in the IP data flow. These various assets are associated in units of “package” by MPT (MMT package table) stored and transmitted in the PA message. Specifically, the MPT includes a package ID (corresponding to a “MMT_package_id_byte” parameter shown in FIG. 17 described later) and an asset ID of each asset included in the package (corresponding to an “asset_id_byte” parameter shown in FIG. 17 described later). Is described, the association is performed.

Although the assets constituting the package may be only the assets in the TLV stream, as shown in FIG. 6E, the assets transmitted in the IP data flow of the communication line may be included. This is because the broadcast receiving apparatus 100 of this embodiment includes the location information of each asset (corresponding to “MMT_general_location_info ()” shown in FIG. 17 described later) included in the package in the MPT, and It can be realized by making it understandable. Specifically, by changing the value of the “MMT_general_location_information_type” parameter located in the location information,
(1) Data multiplexed on the same IP data flow as MPT (location_type = 0x00)
(2) Data multiplexed in the IPv4 data flow (location_type = 0x01)
(3) Data multiplexed in the IPv6 data flow (location_type = 0x02)
(4) Data multiplexed on MPEG2-TS of broadcast (location_type = 0x03)
(5) Data multiplexed in the IP data flow in the MPEG2-TS format (location_type = 0x04)
(6) Data at specified URL (location_type = 0x05)
For example, it is possible to configure so that the broadcast receiving apparatus 100 can refer to various data transmitted through various transmission paths.

  Among the above-mentioned reference destinations, (1) is, for example, an IP data flow received via a digital broadcast signal received by a tuner / demodulation unit 131 of the broadcast receiving apparatus 100 in FIG. 7A described later. When the MPT is transmitted while being included in the IP data flow on the communication line side, the reference destination of (1) may be the IP data flow received by the LAN communication unit 121 described later via the communication line. The above (2), (3), (5), and (6) are IP data flows received by the LAN communication unit 121 via a communication line, which will be described later. In addition, (4) includes, for example, a reception function of receiving a digital broadcast signal using the MMT method and a digital broadcast using the MPEG2-TS method, such as a broadcast receiving apparatus 800 according to a second embodiment illustrated in FIG. In the case of a broadcast receiving apparatus having both of a receiving function of receiving a signal, a digital broadcast using the MPEG2-TS scheme based on MPT location information (“MMT_general_location_info ()”) included in a digital broadcast signal using the MMT scheme. This can be used when referring to data multiplexed on MPEG2-TS received by the signal reception function.

  Although the data constituting the “package” is designated in this manner, in the broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment, a series of data in the “package” unit is converted into the “service” unit of the digital broadcast. Treat as

  Further, in the MPT, presentation time information of each MPU specified by the MPT (corresponding to an “mpu_presentation_time” parameter shown in FIG. 13B described later) is described, and a plurality of MPTs specified by the MPT are specified using the presentation time information. The MPU can be presented (displayed, output, and the like) in conjunction with the MPU based on a clock based on NTP, which is time information in UTC. Presentation control of various data using a clock based on the NTP will be described later.

  In the data transmission method of this embodiment shown in FIG. 6E, there is a concept of “event”. The “event” is a concept indicating a so-called “program” handled by the MH-EIT included in the M2 section message and sent. Specifically, in the “package” indicated by the event package descriptor stored in the MH-EIT, the continuation time from the disclosure time stored in the MH-EIT (corresponding to a “start_time” parameter shown in FIG. 21 described later) A series of data included in a period (corresponding to a “duration” parameter shown in FIG. 21 described later) is data included in the concept of the “event”. The MH-EIT performs various processes (for example, a program table generation process, a recording reservation and a viewing reservation control, and a copyright management process such as a temporary storage) in the broadcast receiving apparatus 100 of the present embodiment in units of “events”. And so on.

[Hardware configuration of broadcast receiving device]
FIG. 7A is a block diagram illustrating an example of the internal configuration of the broadcast receiving device 100. The broadcast receiving apparatus 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 extension interface unit 124, a digital interface unit 125, a tuner / demodulation unit 131, and a separation unit 132. , Video decoder 141, video gamut converter 142, audio decoder 143, character super decoder 144, subtitle decoder 145, subtitle synthesizer 146, subtitle gamut converter 147, data decoder 151, cache unit 152, application control unit 153, It comprises a browser section 154, an application color gamut conversion section 155, a sound source section 156, a video synthesis section 161, a monitor section 162, a video output section 163, a voice synthesis section 164, a speaker section 165, a voice output section 166, and an operation input section 170. Is done.

  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 data communication path for transmitting and receiving data between the main control unit 101 and each operation block in the broadcast receiving device 100.

  A ROM (Read Only Memory) 103 is a nonvolatile memory in which a basic operation program such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM (Electrically Erasable Programmable ROM) or a flash ROM is used. Used. Operation setting values required for the operation of the broadcast receiving apparatus 100 may be stored in the ROM 103. A RAM (Random Access Memory) 104 is 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 use an independent configuration as shown in FIG. 7A, but may use a partial storage area in the storage (accumulation) unit 110.

  The storage (storage) unit 110 stores operation programs and operation setting values of the broadcast receiving device 100, personal information of the user of the broadcast receiving device 100, and the like. In addition, an operation program downloaded via the Internet 200 and various data created by the operation program can be stored. In addition, contents such as moving images, still images, and sounds obtained from broadcast waves or downloaded via the Internet 200 can be stored. Some or all of the functions of the ROM 103 may be replaced with a partial area of the storage (accumulation) unit 110. Further, the storage (storage) unit 110 needs to hold the stored information even when power is not supplied to the broadcast receiving apparatus 100 from the outside. Therefore, for example, devices such as a nonvolatile semiconductor element memory such as a flash ROM and an SSD (Solid State Drive), and a magnetic disk drive such as an HDD (Hard Disc Drive) are used.

  The operation programs stored in the ROM 103 and the storage (storage) unit 110 can be added, updated, and expanded in function by download processing from each server device on the Internet 200.

  A LAN (Local Area Network) communication unit 121 is connected to the Internet 200 via the router device 200r, and transmits and receives data to and from each server device and other communication devices on the Internet 200. It is also assumed that the MMT data sequence (or a part thereof) of the program transmitted via the communication line is obtained. The connection with the router device 200r may be a wired connection or a wireless connection such as Wi-Fi (registered trademark). The LAN communication unit 121 includes an encoding circuit, a decoding circuit, and the like. Further, the broadcast receiving apparatus 100 may further include another communication unit such as a BlueTooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

  The tuner / demodulator 131 receives a broadcast wave transmitted from the radio tower 300t via the antenna 100a, and tunes (selects) to a channel of a service desired by the user under the control of the main controller 101. Further, tuner / demodulator 131 demodulates the received broadcast signal to obtain an MMT data sequence. Although the example shown in FIG. 7A illustrates a configuration in which there is one tuner / demodulation unit, the broadcast receiving apparatus 100 uses the tuner / demodulation unit for the purpose of simultaneously displaying a plurality of screens or recording a back program. It is good also as composition which carries two or more.

  The separating unit 132 is an MMT decoder, and converts a video data sequence, an audio data sequence, a character super data sequence, a subtitle data sequence, and the like, which are real-time presentation elements, based on a control signal in the input MMT data sequence, into a video decoder 141, respectively. , An audio decoder 143, a character super decoder 144, a subtitle decoder 145, and the like. The data input to the demultiplexing unit 132 is an MMT data sequence transmitted via a broadcast transmission path and demodulated by a tuner / demodulation unit 131 or an MMT data sequence transmitted via a communication line and received by a LAN communication unit 121. It can be a row. Further, the separating unit 132 reproduces the multimedia application and the file data which is a component of the multimedia application, and temporarily stores the reproduced data in the cache unit 152. In addition, the separating unit 132 extracts general-purpose data and outputs the general-purpose data to the data decoder 151 for use in streaming of data used by a player who presents data other than video / audio subtitles or data for an application. Further, the separation unit 132 may perform error correction, access restriction control, and the like on the input MMT data sequence based on the control of the main control unit 101.

  The video decoder 141 decodes the video data sequence input from the separation unit 132 and outputs video information. The video color gamut conversion unit 142 performs a color space conversion process on the video information decoded by the video decoder 141 as necessary for the video synthesis process by the video synthesis unit 161. The audio decoder 143 decodes the audio data sequence input from the separation unit 132 and outputs audio information. Further, even if streaming data acquired from the Internet 200 via the LAN communication unit 121 and in the form of, for example, MPEG-DASH (MPEG-Dynamic Adaptive Streaming over HTTP) is input to the video decoder 141 and the audio decoder 143, good. A plurality of video decoders 141, video color gamut converters 142, audio decoders 143, and the like may be provided in order to simultaneously decode a plurality of types of video data strings and audio data strings.

  The character super decoder 144 decodes the character super data string input from the separation unit 132 and outputs character super information. The subtitle decoder 145 decodes the subtitle data sequence input from the separation unit 132 and outputs subtitle information. The superimposition information output from the superimposition decoder 144 and the subtitle information output from the subtitle decoder 145 are subjected to a synthesizing process in a subtitle synthesizing unit 146. A color space conversion process is performed as necessary for the video synthesis process. In the present embodiment, of the services mainly provided with text information, which are presented simultaneously with the video of the broadcast program, those related to the content of the video are referred to as subtitles, and the others are referred to as superimposed text. I do. When they are not distinguished from each other, they are collectively called subtitles.

  The browser unit 154 converts the multimedia application file acquired from the server device on the Internet 200 via the cache unit 152 or the LAN communication unit 121 or the file system data which is a component thereof into the control information or the LAN included in the MMT data sequence. The control information obtained from the server device on the Internet 200 via the communication unit 121 is presented according to an instruction from the application control unit 153 that interprets the control information. The multimedia application file may be an HTML (Hyper Text Markup Language) document, a BML (Broadcast Markup Language) document, or the like. The application information output from the browser unit 154 is further subjected to a color space conversion process in the application color gamut conversion unit 155 for video synthesis processing in the video synthesis unit 161 as necessary. The browser section 154 also plays application sound information by acting on the sound source section 156.

  The video synthesis unit 161 receives the video information output from the video color gamut conversion unit 142, the subtitle information output from the subtitle color gamut conversion unit 147, the application information output from the application color gamut conversion unit 155, and the like. Processing such as selection and / or superposition is performed. The video synthesizing unit 161 includes a video RAM (not shown), and the monitor unit 162 and the like are driven based on video information and the like input to the video RAM. In addition, the video synthesizing unit 161 performs an EPG (Electronic Program Guide) created based on information such as MH-EIT included in the scaling process and the MMT-SI as needed under the control of the main control unit 101. Performs superimposition processing of screen information. The monitor unit 162 is a display device such as a liquid crystal panel, for example, and provides the user of the broadcast receiving device 100 with the video information selected and / or superimposed by the video synthesizing unit 161. The video output unit 163 is a video output interface that outputs the video information selected and / or superimposed by the video synthesis unit 161.

  The presentation function of the broadcast receiving apparatus 100 according to the present embodiment has a logical plane structure in order to display the multimedia service as intended by the provider. FIG. 7B illustrates an example of a configuration of a logical plane structure included in the presentation function of the broadcast receiving device 100 according to the present embodiment. In the logical plane structure, a character super plane for displaying a superimposed character is disposed at the forefront, and a subtitle plane for displaying subtitles is disposed in the next layer. A multimedia plane for displaying a broadcast video, a multimedia application, or a composite video thereof is arranged on the third layer, and a background plane is arranged on the rearmost side. In the caption synthesizing unit 146 and the video synthesizing unit 161, drawing of the superimposition information on the superimposing plane, drawing of the subtitle information on the caption plane, and rendering of the video information and the application information on the multimedia plane are performed. The background color is drawn on the background plane based on the LCT included in the MMT-SI. It is assumed that a plurality of third-layer multimedia planes can be prepared according to the number of video decoders 141. However, even when there are a plurality of multimedia planes, the application information and the like output from the application color gamut converter 155 are output only to the foreground multimedia plane.

  The voice synthesis unit 164 receives the voice information output from the voice decoder 143 and the application voice information reproduced by the sound source unit 156, and performs appropriate processing such as selection and / or mixing. The speaker unit 165 provides the user of the broadcast receiving device 100 with the audio information selected and / or mixed by the audio synthesizing unit 164. The audio output unit 166 is an audio output interface that outputs the audio information that has been selected and / or mixed by the audio synthesis unit 164.

  The extension interface unit 124 is a group of interfaces for extending the function of the broadcast receiving apparatus 100. In this embodiment, the extension interface unit 124 includes an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. I do. The analog video / audio interface inputs an analog video signal / audio signal from an external video / audio output device, outputs an analog video signal / audio signal to an external video / audio input device, and the like. The USB interface transmits and receives data by connecting to a PC or the like. A broadcast program or content may be recorded by connecting an HDD. Further, a keyboard or other USB devices may be connected. The memory interface transmits and receives data by connecting a memory card and other memory media.

  The digital interface unit 125 is an interface that outputs or inputs encoded digital video data and / or digital audio data. The digital interface unit 125 can directly output the MMT data sequence demodulated by the tuner / demodulation unit 131, the MMT data sequence acquired via the LAN communication unit 121, or the mixed data of the MMT data sequences. Shall be. Further, control may be performed such that the MMT data sequence input from the digital interface unit 125 is input to the separation unit 132. The output of the digital content stored in the storage (storage) unit 110 or the storage of the digital content in the storage (storage) unit 110 may be performed via the digital interface unit 125.

  The digital interface unit 125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and outputs or inputs data in a format compliant with the DVI specification, the HDMI specification, the Display Port specification, or the like. May be something. It may be output or input in the form of serial data conforming to the IEEE 1394 specification or the like. Further, it may be configured as an IP interface that outputs a digital interface via hardware such as Ethernet (registered trademark) or wireless LAN. In this case, the digital interface unit 125 and the LAN communication unit 121 may share the hardware configuration.

  The operation input unit 170 is an instruction input unit for inputting an operation instruction to the broadcast receiving apparatus 100. In the present embodiment, a remote control reception unit for receiving a command transmitted from a remote control (not shown) and a button switch are arranged. It shall be composed of operation keys. Either one may be used. Further, the operation input unit 170 may be replaced with a touch panel that is arranged so as to overlap the monitor unit 162. A keyboard or the like connected to the extension interface unit 124 may be used instead. The remote controller (not shown) may be replaced with a portable information terminal 700 having a remote controller command transmission function.

  Note that, as described above, when the broadcast receiving device 100 is a television receiver or the like, the video output unit 163 and the audio output unit 166 are not essential components of the present invention. The broadcast receiving device 100 may be a television receiver, an optical disk drive recorder such as a DVD (Digital Versatile Disc) recorder, a magnetic disk drive recorder such as an HDD recorder, an STB (Set Top Box), or the like. A PC (Personal Computer), a tablet terminal, a navigation device, a game machine, or the like having a digital broadcast receiving function and a broadcast communication cooperation function may be used. When the broadcast receiving device 100 is a DVD recorder, an HDD recorder, an STB, or the like, the monitor unit 162 and the speaker unit 165 may not be provided. By connecting an external monitor and an external speaker to the video output unit 163 and the audio output unit 166 or the digital interface unit 125, the same operation as that of the broadcast receiving apparatus 100 of the present embodiment can be performed.

[System Configuration of Clock Synchronization / Presentation Synchronization of Broadcast Receiver]
FIG. 7C is an example of a clock synchronization / presentation synchronization system configuration in a broadcast system to which the broadcast receiving device 100 according to the present embodiment corresponds. In the broadcasting system of the present embodiment, the UTC is transmitted from the broadcast transmitting system to a receiver (such as the broadcast receiving apparatus 100 of the present embodiment) in a 64-bit NTP time stamp format. In the NTP time stamp format, "second or more" of UTC is represented by 32 bits, and "less than second" is represented by 32 bits. However, in practice, it is difficult to reproduce one second with 32-bit accuracy. Therefore, as a system clock for synchronizing the video system and a system clock for operating an NTP type clock, for example, "2 to the 24th power" Hz (about 16.8 MHz) as shown in FIG. May be used. In consideration of the fact that the system clock in the conventional broadcasting system is 27 MHz and that the hardware configuration of the receiver can be easily constructed, 2 to the 24th to 2 to the 28th is considered. It is desirable to use a power frequency as the system clock.

  When the system clock is set to a power of 2 such as “2 to the 24th power” to “2 to the 28th power” on the broadcast transmission system side and the receiver side as described above, the reception from the broadcast transmission system side In the NTP time stamp format transmitted to the device side, the lower 8 to 4 bits that are not referred to by the PLL (Phase Locked Loop) system for reproducing the system clock or the NTP format clock are “0” or “1”. You may make it fix to. That is, if the system clock is “2 n” Hz (n = 24 in the example of FIG. 7C), the lower “32-n” bits of the NTP time stamp format are fixed to “0” or “1”. You may do it. Alternatively, the receiver side may perform processing to ignore the lower “32-n” bits of the NTP time stamp format.

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

  The receiver side receives the time information in the NTP length format via the broadcast transmission path, and reproduces the receiving system clock by the PLL system based on the VCO of “2 n” Hz, similarly to the broadcast transmission system side. Thereby, the receiving system clock becomes a clock synchronized with the broadcast transmitting system side. Also, by operating the signal processing system of the receiver in synchronization with the system clock of "2 to the power of n" Hz, clock synchronization between the broadcast transmission system side and the receiver side is realized, and stable signal reproduction is possible. Become. The decoding time and the presentation time of 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. 13B described later 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 timestamp descriptor of FIG. 13B indicates the sequence number of the MPU that describes the time stamp, and the “mpu_presentation_time (MPU presentation time)” parameter indicates the presentation time of the MPU by a 64-bit NTP. Shown in timestamp format. Therefore, the receiver can control the presentation (display, output, etc.) timing of each MPU such as a video signal, an audio signal, subtitles, and a superimposed character by referring to the MPU time stamp descriptor stored in the MPT. .

  When attention is paid to the control of the decoding timing and the presentation timing for each presentation unit of the video / audio signal or the like, the synchronization of the video / audio signal can be performed even with a clock of “2 × 16” Hz (about 65.5 KHz). Can be secured. In this case, it is not necessary to refer to the lower 16 bits of the NTP time stamp format described in the MPU time stamp descriptor or the like. That is, when a clock of “2 m” Hz generated by frequency division of the system clock or the like is used for controlling the decoding timing and the presentation timing, the lower order of the NTP time stamp format described in the MPU time stamp descriptor or the like is used. The "32-m" bit need not be referred to. Therefore, the lower “32-m” bits of the NTP time stamp format described in the MPU time stamp descriptor or the like may be fixed to “0” or “1”.

[Software configuration of broadcast receiving device]
FIG. 7D is a software configuration diagram of the broadcast receiving apparatus 100 according to the present embodiment, and illustrates a software configuration in the ROM 103, the RAM 104, and the storage (storage) unit 110. In this embodiment, the ROM 103 stores a basic operation program 1001 and other operation programs, and the storage (storage) unit 110 stores a reception function program 1002 and other operation programs. The storage (storage) unit 110 includes a content storage area 1200 that stores contents such as moving images, still images, and audio, and an authentication unit that stores authentication information and the like necessary for accessing an external portable terminal device or each server device. An information storage area 1300 and various information storage areas for storing various other information are provided.

  The basic operation program 1001 stored in the ROM 103 is expanded on the RAM 104, and the main control unit 101 executes the expanded basic operation program to configure the basic operation execution unit 1101. Similarly, the reception function program 1002 stored in the storage (accumulation) unit 110 is also expanded in the RAM 104, and the main control unit 101 executes the expanded reception function program to configure the reception function execution unit 1102. I do. Further, the RAM 104 is provided with a temporary storage area for temporarily storing data created when each operation program is executed, as needed.

  In the following, for the sake of simplicity, the main control unit 101 expands the basic operation program 1001 stored in the ROM 103 into the RAM 104 and executes the basic operation program 1001 to control each operation block. The description will be made assuming that the unit 1101 controls each operation block. Similar descriptions are made for other operation programs.

  The reception function execution unit 1102 controls each operation block of the broadcast receiving apparatus 100 to reproduce components such as video and audio transmitted by the broadcast system of the present embodiment. In particular, the transport processing unit 1102a mainly controls the MMT decoder function of the separation unit 132, and distributes the video data sequence, the audio data sequence, and the like separated from the MMT data sequence to the corresponding decode processing units. The AV decode processing unit 1102b mainly controls the video decoder 141, the audio decoder 143, and the like. The application processing unit 1102c mainly controls the cache unit 152, the application control unit 153, the browser unit 154, and the sound source unit 156. The character super processing unit 1102d mainly controls the character super decoder 144. The subtitle processing unit 1102e mainly controls the subtitle decoder 145. The general-purpose data processing unit 1102f mainly controls the data decoder 151. The EPG generation unit 1102g generates an EPG screen by interpreting the description content such as MH-EIT included in the MMT-SI. The presentation processing unit 1102h includes a video gamut conversion unit 142, a subtitle synthesis unit 146, a subtitle gamut conversion unit 147, an application color gamut conversion unit 155, a video synthesis unit 161, and an audio synthesis unit 164 based on the logical plane structure. Is mainly controlled.

  Each of the operation programs may be stored in advance in the ROM 103 and / or the storage (accumulation) unit 110 at the time of product shipment. After the product is shipped, it may be obtained from another application server 500 or the like on the Internet 200 via the LAN communication unit 121. Further, the operation programs stored in a memory card, an optical disk, or the like may be obtained through the extension interface unit 124 or the like.

[Configuration of broadcast server]
FIG. 8 is a block diagram showing an example of the internal configuration of the broadcast station server 300. The broadcast station server 300 includes a main control unit 301, a system bus 302, a RAM 304, a storage unit 310, a LAN communication unit 321, and a digital broadcast signal transmission unit 360.

  The main control unit 301 is a microprocessor unit that controls the entire broadcast station server 300 according to a predetermined operation program. The system bus 302 is a data communication path for performing data transmission and reception between the main control unit 301 and each operation block in the broadcast station server 300. The RAM 304 is a work area when executing each operation program.

  The storage unit 310 stores a basic operation program 3001, a broadcast content management / distribution program 3002, and a broadcast content transmission program 3003, and further includes a broadcast content storage area 3200 and a metadata storage area 3300. The broadcast content storage area 3200 stores the program content of each broadcast program broadcast by the broadcast station. The metadata storage area 3300 stores metadata such as the program title, program ID, program outline, cast, broadcast date and time, copy control information relating to each program content, and the like of each broadcast program.

  Further, the basic operation program 3001, the broadcast content management / distribution program 3002, and the broadcast content transmission program 3003 stored in the storage unit 310 are loaded on the RAM 304, respectively, and the main control unit 301 executes the loaded programs. Form a basic operation execution unit 3101, a broadcast content management / distribution execution unit 3102, and a broadcast content transmission execution unit 3103.

  In the following, for the sake of simplicity, a process of controlling each operation block by the main control unit 301 expanding the basic operation program 3001 stored in the storage unit 310 in the RAM 304 and executing the basic operation program 3001 will be described below. The operation execution unit 3101 is described as controlling each operation block. Similar descriptions are made for other operation programs.

  The broadcast content management / distribution execution unit 3102 manages the program content and the like of each broadcast program and each metadata stored in the broadcast content storage area 3200 and the metadata storage area 3300, and manages the program content and the like of each broadcast program and the like. Controls when metadata is provided to a service provider based on a contract. Further, the broadcast content management / distribution execution unit 3102 provides a service provider based on the contract as necessary when providing the service provider with the program content and the like and the respective metadata of each broadcast program. Authentication processing of the server 400 may be performed.

  The broadcast content transmission execution unit 3103 stores the program content of the broadcast program stored in the broadcast content storage area 3200, the program title of the broadcast program stored in the metadata storage area 3300, the program ID, the copy control information of the program content, and the like. It manages the time schedule when transmitting the MMT data sequence including the MMT data string from the radio tower 300t via the digital broadcast signal transmitting unit 360.

  The LAN communication unit 321 is connected to the Internet 200 and communicates with the service provider server 400 and the like on the Internet 200. The LAN communication unit 321 includes an encoding circuit, a decoding circuit, and the like. The digital broadcast signal transmission unit 360 modulates an MMT data sequence composed of a video data sequence, an audio data sequence, a program information data sequence, and the like of the program content of each broadcast program stored in the broadcast content storage area 3200. , And transmitted as a digital broadcast wave via the radio tower 300t.

[Configuration of service provider server]
FIG. 9 is a block diagram showing an example of the internal configuration of the service provider server 400. The service provider server 400 includes a main control unit 401, a system bus 402, a RAM 404, a storage unit 410, and a LAN communication unit 421.

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

  The storage unit 410 stores a basic operation program 4001, a video content management / distribution program 4002, and an application management / distribution program 4004, and further stores a video content storage area 4200, a metadata storage area 4300, an application storage area 4400, and a user information storage. An area 4500 is provided. The video content storage area 4200 stores program content of a broadcast program provided from the broadcast station server 300 as video content. Also, it stores video contents and the like produced by the service provider. The metadata storage area 4300 stores metadata provided from the broadcast station server 300, metadata related to video contents produced by the service provider, and the like. The application storage area 4400 stores various applications and the like for realizing a service associated with a broadcast program for distribution in response to a request from each television receiver. The user information storage area 4500 stores information (personal information, authentication information, and the like) regarding users who are permitted to access the service provider server 400.

  The basic operation program 4001 and the video content management / distribution program 4002 and the application management / distribution program 4004 stored in the storage unit 410 are loaded on the RAM 404, respectively. By executing the content management / distribution program and the application management / distribution program, a basic operation execution unit 4101, a video content management / distribution execution unit 4102, and an application management / distribution execution unit 4104 are configured.

  In the following, for the sake of simplicity, a process in which 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 will be described. The operation execution unit 4101 will be described as controlling each operation block. Similar descriptions are made for other operation programs.

  The video content management / distribution execution unit 4102 acquires the program content and the like of the broadcast program from the broadcast station server 300 and the metadata, the video content and the like stored in the video content storage area 4200 and the metadata storage area 4300, and each metadata. And the distribution of the video content and the like and each metadata to each television receiver. Further, the video content management / distribution execution unit 4102 performs authentication processing of each of the television receivers as necessary when distributing each of the video content and the like and each of the metadata to each of the television receivers. You may go. The application management / distribution execution unit 4104 manages each application stored in the application storage area 4400 and controls distribution of each application in response to a request from each television receiver. Furthermore, the application management / distribution execution unit 4104 may perform an authentication process or the like of each of the television receivers as necessary when distributing each of the applications to each of the television receivers.

  The LAN communication unit 421 is connected to the Internet 200 and communicates with the broadcast receiving device 100 via the broadcast station server 300 on the Internet 200 and the router device 200r. The LAN communication unit 421 includes a coding circuit, a decoding circuit, and the like.

[Hardware configuration of portable information terminal]
FIG. 10A is a block diagram illustrating an example of an internal configuration of portable information terminal 700. The portable information terminal 700 includes a main control unit 701, a system bus 702, a ROM 703, a RAM 704, a storage unit 710, a communication processing unit 720, an extended interface unit 724, an operation unit 730, an image processing unit 740, an audio processing unit 750, and a sensor unit 760. , Is composed.

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

  The ROM 703 is a 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 or a flash ROM is used. The RAM 704 serves as a work area when executing the basic operation program and other operation programs. The ROM 703 and the RAM 704 may be integrated with the main control unit 701. Further, the ROM 703 may use a partial storage area in the storage unit 710 instead of having the independent configuration as illustrated in FIG. 10A.

  The storage unit 710 stores operation programs and operation setting values of the portable information terminal 700, personal information of the user of the portable information terminal 700, and the like. In addition, an operation program downloaded via the Internet 200 and various data created by the operation program can be stored. In addition, contents such as a moving image, a still image, a sound, and the like downloaded via the Internet 200 can be stored. All or a part of the functions of the ROM 703 may be replaced by a partial area of the storage unit 710. The storage unit 710 needs to hold the stored information even when power is not supplied to the portable information terminal 700 from outside. Therefore, for example, a device such as a nonvolatile semiconductor element memory such as a flash ROM or an SSD or a magnetic disk drive such as an HDD is used.

  It is assumed that the operation programs stored in the ROM 703 and the storage unit 710 can be added, updated, and expanded in function by download processing from each server device on the Internet 200.

  The communication processing unit 720 includes a LAN communication unit 721, a mobile phone network communication unit 722, and an NFC communication unit 723. The LAN communication unit 721 is connected to the Internet 200 via the router device 200r and the access point 200a, and transmits and receives data to and from each server device and other communication devices on the Internet 200. It is assumed that the connection with the router device 200r and the access point 200a is made by wireless connection such as Wi-Fi (registered trademark). The mobile telephone network communication unit 722 performs telephone communication (call) and data transmission / reception by wireless communication with the base station 600b of the mobile telephone communication network. The NFC communication unit 723 performs wireless communication when approaching a corresponding reader / writer. The LAN communication unit 721, the mobile telephone network communication unit 722, and the NFC communication unit 723 each include an encoding circuit, a decoding circuit, an antenna, and the like. Further, the communication processing unit 720 may further include another communication unit such as a BlueTooth (registered trademark) communication unit or an infrared communication unit.

  The extension interface unit 724 is a group of interfaces for extending the function of the portable information terminal 700. In this embodiment, the extension interface unit 724 includes a video / audio interface, a USB interface, a memory interface, and the like. The video / audio interface performs input of a video signal / audio signal from an external video / audio output device, output of a video signal / audio signal to an external video / audio input device, and the like. The USB interface transmits and receives data by connecting to a PC or the like. Further, a keyboard or other USB devices may be connected. The memory interface transmits and receives data by connecting a memory card and other memory media.

  The operation unit 730 is an instruction input unit that inputs an operation instruction to the portable information terminal 700. In the present embodiment, the operation unit 730 includes a touch panel 730t that is arranged to overlap the display unit 741 and operation keys 730k in which button switches are arranged. Shall be. Either one may be used. The portable information terminal 700 may be operated using a keyboard or the like connected to the extension interface unit 724. The operation of the portable information terminal 700 may be performed using a separate terminal device connected by wire communication or wireless communication. That is, the portable information terminal 700 may be operated from the broadcast receiving device 100. Further, the touch panel function may be provided in the display unit 741.

  The image processing unit 740 includes a display unit 741, an image signal processing unit 742, a first image input unit 743, and a second image input unit 744. The display unit 741 is a display device such as a liquid crystal panel, for example, and provides the image data processed by the image signal processing unit 742 to the user of the portable information terminal 700. The image signal processing unit 742 includes a video RAM (not shown), and the display unit 741 is driven based on the image data input to the video RAM. Further, the image signal processing unit 742 has a function of performing format conversion, superimposition processing of a menu and other OSD (On Screen Display) signals, and the like as necessary. The first image input unit 743 and the second image input unit 744 convert light input from a lens into an electrical signal by using an electronic device such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) sensor. , A camera unit for inputting image data of surroundings and an object.

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

  The sensor unit 760 is a group of sensors for detecting the state of the portable information terminal 700. In this embodiment, the GPS unit 761, the gyro sensor 762, the geomagnetic sensor 763, the acceleration sensor 764, the illuminance sensor 765, and the proximity sensor 766 are provided. , Is composed. With these sensor groups, it is possible to detect the position, inclination, direction, movement, and surrounding brightness of the portable information terminal 700, the proximity of surrounding objects, and the like. Further, the portable information terminal 700 may further include another sensor such as a barometric pressure sensor.

  The portable information terminal 700 may be a mobile phone, a smart phone, a tablet terminal, or the like. It may be a PDA (Personal Digital Assistants) or a notebook PC. Further, it may be a digital still camera, a video camera capable of shooting a moving image, a portable game machine, a navigation device, or the like, or another portable digital device.

  The configuration example of the portable information terminal 700 shown in FIG. 10A includes a number of components that are not essential to the present embodiment, such as the sensor unit 760. It does not impair the effect of. Further, a configuration (not shown) such as a digital broadcast receiving function and an electronic money settlement function may be further added.

[Software configuration of portable information terminal]
FIG. 10B is a software configuration diagram of the portable information terminal 700 according to the present embodiment, and illustrates a software configuration in the ROM 703, the RAM 704, and the storage unit 710. In this embodiment, the basic operation program 7001 and other operation programs are stored in the ROM 703, and the cooperation control program 7002 and other operation programs are stored in the storage unit 710. Further, the storage unit 710 includes a content storage area 7200 for storing contents such as moving images, still images, and audio, an authentication information storage area 7300 for storing authentication information and the like necessary for accessing a television receiver and each server device, It is assumed that various information storage areas for storing other various information are provided.

  The basic operation program 7001 stored in the ROM 703 is expanded in the RAM 704, and the main control unit 701 executes the expanded basic operation program to configure the basic operation execution unit 7101. In addition, the cooperation control program 7002 stored in the storage unit 710 is similarly expanded on the RAM 704, and the main control unit 701 executes the expanded cooperation control program to configure the cooperation control execution unit 7102. Further, the RAM 704 has a temporary storage area for temporarily storing data created when each operation program is executed, as necessary.

  In the following, in order to simplify the description, the main control unit 701 expands the basic operation program 7001 stored in the ROM 703 into the RAM 704 and executes the basic operation program 7001 to control each operation block. The description will be made assuming that the unit 7101 controls each operation block. Similar descriptions are made for other operation programs.

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

  Each of the operation programs may be stored in advance in the ROM 703 and / or the storage unit 710 at the time of product shipment. After the product is shipped, it may be obtained 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. Further, the operation programs stored in a memory card, an optical disk, or the like may be obtained via the extension interface unit 724 or the like.

[Time management of broadcast receiving device]
The broadcast receiving apparatus of the present embodiment has two types of time management functions. The first time management function is a time management function based on NTP, and is as described above with reference to FIG. 7C. The second time management function is a time management function based on the MH-TOT, and is a time managed based on the time information transmitted by the MH-TOT described with reference to FIG. 6B.

  FIG. 13A shows an example of the configuration of time information transmitted by NTP. FIG. 13B shows an example of the data structure of the MPU time stamp descriptor. The “reference_timestamp” parameter and the “transmit_timestamp” parameter in the NTP format are 64-bit NTP length time data, and the “mpu_presentation_time” parameter in the MPU timestamp descriptor is also a 64-bit NTP timestamp. It is time data in the format. The time data in the NTP length format and the time data in the NTP time stamp format are data in which “more than second” of UTC is represented by 32 bits and “less than second” is represented by 32 bits. That is, the time information in the NTP format can transmit time information up to “less than seconds”. Furthermore, since the time information in the NTP format is in UTC notation, unlike clock management in conventional digital broadcasting, as shown in FIG. 3B, a communication line path (for example, a communication that can be received by the LAN communication unit 121 in FIG. 7A). (NTP) included in the signal received on the line.

  On the other hand, information transmitted by MH-TOT is as follows. It is assumed that the broadcast receiving device 100 can acquire the current date and the Japan Standard Time by MH-TOT. FIG. 11A shows an example of the data structure of the MH-TOT. The broadcast receiving apparatus 100 can acquire the current date and the current time from the “JST_time” parameter of the MH-TOT. As shown in FIG. 11B, the “JST_time” parameter includes, as shown in FIG. 11B, the lower 16 bits of the encoded data of the current date based on the modified Julian Date (MJD) and the sixteenth of Japan Standard Time (Japan Standard Time: JST). It is assumed that the information includes 24-bit information expressed in a binary-coded decimal (BCD). The present date can be calculated by performing a predetermined operation on the MJD 16-bit encoded data. The six 4-bit binary-coded decimal numbers represent "hour" in two decimal digits using two 4-bit binary-coded decimal numbers, and the decimal number 2 is provided using the next two 4-bit binary-coded decimal numbers. The digits represent "minutes" and the last two 4-bit binary coded decimal numbers represent "seconds" using two decimal digits.

  Therefore, the difference between the time based on the NTP and the time based on the MH-TOT is that the former NTP is information in UTC notation capable of transmitting time information up to “less than second” as described above, whereas MH- The information transmitted by TOT is information up to “seconds” in JST notation.

  The broadcast receiving apparatus 100 according to the present embodiment performs a time management function based on NTP, which is time information in UTC, by synchronizing the decoding and display of video, audio, subtitles, superimposed text, and other presentation data, which are the contents of broadcast signals. , A more accurate synchronization process can be realized. Furthermore, by referring to the information in the UTC not the clock notation of the broadcasting station, the content of the broadcast signal to be received as the broadcast signal, such as video, audio, subtitles, superimposed text, or other data, is obtained through the communication line path. It can also perform decoding and display synchronization processing with video, audio, subtitles, superimposed text, or other data.

  Further, the broadcast receiving apparatus according to the present embodiment provides a time management function based on “JST_time” including 24-bit information represented by six 4-bit binary coded decimal numbers of the MH-TOT, by presenting the current time to the user. It may be used for processing or each processing that handles the MH-event information table (MH-EIT) described in FIG. 6B. Generally, in the process of presenting the current time to the user in the broadcast receiving device, accuracy of less than a second is hardly required. Each time information described in the MH-event information table (MH-EIT) is represented by six 4-bit binary coded decimal numbers, similarly to the conventional digital broadcast EIT transmitted by the MPEG2-TS system. This 24-bit information is stored as "hour", "minute", and "second" in two decimal digits. For this reason, the time management function based on MH-TOT in the broadcast receiving apparatus 100 of the present embodiment is easy to match the processing using MH-EIT. The processing using the MH-EIT is, specifically, a program table generation processing (to be described later), a recording management and a viewing reservation control, a copyright management processing such as a temporary storage, and the like. This is because it is rare that any process requires an accuracy of less than a second, and an accuracy of one second is sufficient.

  The copyright management processing such as the program table generation processing, recording reservation and viewing reservation control, temporary storage, and the like is a function that is also installed in a receiver of a conventional digital broadcasting system using the MPEG2-TS system. . Then, even in the broadcasting system of the present embodiment, in the processing of generating the program guide, controlling the recording reservation and viewing reservation, and performing the copyright management processing such as temporary storage, etc., the conventional MPEG2-TS digital broadcasting system is used. If it is configured to be able to cope with the time management processing having consistency, a broadcast receiving apparatus having both a conventional MPEG2-TS digital broadcast receiving function and an MMT digital broadcast receiving function is configured. In this case, there is no need to separately design processing algorithms in these processes (program guide generation processing, control of recording reservation and viewing reservation, copyright management processing such as temporary storage, etc.), and cost is reduced. can do.

  Further, even if the receiver does not have the function of receiving the conventional MPEG2-TS digital broadcast but has only the function of receiving the digital broadcast of the MMT system, even if the receiver has only the function of receiving the digital broadcast of the MMT system, the program guide generation processing, the control of the recording reservation and the viewing reservation, Even if a completely new algorithm for processing such as copyright management processing such as temporary storage is not completely created, the algorithm of the function installed in the receiver of the digital broadcasting system using the conventional MPEG2-TS system can be used. It can be developed at lower cost.

  Therefore, a configuration in which the time management function based on the "JST_time" parameter of the MH-TOT is used for these processes (processing such as program table generation processing, control of recording reservation and viewing reservation, and copyright management processing such as temporary storage). By doing so, it is possible to provide even a low cost broadcast receiving apparatus for digital broadcasting of the MMT system by improving the consistency with the broadcasting system of the conventional system.

  As described above, the broadcast receiving apparatus 100 of the present embodiment has a time management function using two types of time information having different precisions. One of the time information is time information in notation compatible with the conventional digital broadcasting system, the other time information is time information having a higher resolution than the one time information, and the latter time information is By using it for the synchronization processing of each content data, it realizes a more advanced information presentation process than the conventional broadcasting system, and uses the former time information for program table generation processing, recording reservation and viewing reservation control, temporary storage, etc. The broadcast receiving apparatus can be provided at a low cost by using it for the right management processing and the like.

  Therefore, in the broadcast receiving apparatus 100 of the present embodiment, by providing the two types of time management functions described above, it is possible to achieve both higher-level information presentation processing and lower cost.

[First Modification of Time Management]
Next, a first modification of the time management in the broadcasting system of the present embodiment will be described below.

  In the first modification, in order to improve the accuracy of the management time of the time management function based on the NTP described above with reference to FIG. 7C, the time management server (not shown) or the broadcast station server 300 to the broadcast receiving device 100 The broadcast receiving apparatus 100 is configured to transmit the information related to the assumed delay time in the time information transmission in the broadcast signal and to use the information related to the assumed delay time for correcting the system clock of the time management function based on NTP. Is also good.

  At this time, the information on the assumed delay time may be transmitted not in the TLV multiplexed stream shown in FIG. 3A but in a TMCC (Transmission and Multiplexing Configuration Control) region outside the TLV multiplexed stream. good. If the transmission is performed in the TMCC area, the broadcast receiving apparatus 100 can extract the information on the estimated delay time without going through the separation processing (demux processing) of the TLV multiplexed stream. That is, it is possible to obtain information that is less likely to be affected by the delay due to the separation processing in the broadcast receiving apparatus 100, and thus it is possible to perform a highly accurate system clock correction processing. An example of the data structure of the time information transmitted by the TMCC signal will be described with reference to FIG. 13C. The time information may be stored and transmitted in the TMCC extended information area, for example. In the time information of the TMCC extended information area shown in FIG. 13C, the “delta” parameter is a 32-bit estimated value of the transmission delay from the time management server that distributes UTC or the server device that creates the TMCC signal to a general broadcast receiving device. It is represented by a fixed point with a sign. The upper 16 bits describe the integer part, and the lower 16 bits describe the decimal part. The “transmit_timestamp” parameter is a transmission time stamp, and describes the time at which the TMCC signal is transmitted from the server device in an NTP time stamp length format. The upper 32 bits indicate the integer part, and the lower 32 bits indicate the decimal part.

  In the first modified example, the broadcast receiving apparatus 100 according to the present embodiment uses the information (for example, the above-mentioned “delta”) related to the assumed delay time described in the time information stored and transmitted in the TMCC extended information area. Using the parameter and / or the “transmit_timestamp” parameter), the system clock of the time management function based on NTP used for the synchronization processing of each content data of the broadcast signal can be corrected with higher accuracy.

[Second Modification of Time Management]
Next, a second modification of the time management in the broadcasting system of the present embodiment will be described below.

  As described above, the broadcast receiving apparatus 100 of the present embodiment has a time management function of managing the time by acquiring the current date and the Japan Standard Time from information transmitted by the MH-TOT. The current date and the Japanese Standard Time obtained by the information transmitted by the MH-TOT are superimposed on the video information and the application information by the video synthesizing unit 161 of the broadcast receiving apparatus 100, so that the monitor unit 162 and the video output unit 163 are superimposed. It can be output and provided to the user. As described above, the MH-TOT has the data structure shown in FIG. 11A, and the broadcast receiving apparatus 100 can acquire the current date and the current time from the “JST_time” parameter of the MH-TOT.

  However, in the above-mentioned “JST_time” parameter, since only the lower 16 bits of the MJD encoded data are used, an overflow occurs with “April 22, 2038”, and the predetermined operation is performed. It is not possible to express the date after “April 23, 2038” by using only. Therefore, in the second modification of the present embodiment, the date after “April 23, 2038” is expressed by switching the calculation method between a case where the value of MJD is equal to or more than a predetermined value and a case where the value of MJD is less than the predetermined value. It shall be controlled so that it can be performed.

  FIG. 12 shows an example of a first calculation method used when the value of MJD is equal to or more than a predetermined value, and an example of a second calculation method used when the value of MJD is less than the predetermined value. For example, when the predetermined value is “32768 (0x8000)”, the current date is calculated using the first calculation method when the MJD is “32768” or more, and when the MJD is less than “32768”, Calculates the current date using the second calculation method. Note that the case where the MJD is less than “32768” is equivalent to the case where the most significant bit of the 16-bit data of the MJD is “0”. As a result, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to represent dates after “April 23, 2038”. However, the predetermined value can be set arbitrarily, and the predetermined value may be set to "16384 (0x4000)", "49152 (0xC000)", or the like. The switching method of the operation method may be such that the upper two bits of the MJD 16-bit data are “00” and the upper two bits of the MJD 16-bit data are not “11”. If the above-mentioned means is used with the predetermined value set to "32768", the date before "September 4, 1948" cannot be expressed, but this does not pose any particular problem in practical use as a television receiver. .

  Also, instead of switching between the first calculation method and the second calculation method according to the comparison result between MJD and the predetermined value, the “reserved” parameter in the MH-TOT data structure shown in FIG. The first calculation method and the second calculation method may be switched in accordance with a partially or entirely replaced flag or a newly added flag. For example, the flag is set to “1” if the most significant bit of the 16-bit coded data of the MJD is “0” and the MJD indicates “April 23, 2038” or later. However, if it does not indicate "April 23, 2038" or later, "0" may be set. When the flag is "1", the second calculation method shown in FIG. 12 is used, and when the flag is "0", the first calculation method is used. Alternatively, a descriptor having the same meaning as the flag may be newly prepared and arranged in the MH-TOT.

  Further, in the broadcast system of the present embodiment, as described above, the absolute time in the NTP format is transmitted, and the broadcast receiving device 100 of the present embodiment has a time management function based on the NTP. Further, the broadcast receiving apparatus 100 of the present embodiment refers to the NTP time stamp described in the MPU time stamp descriptor set for each MPU, and thereby decodes and presents the video / audio signal for each presentation unit. Controlling timing. As described above, the time information in the NTP format has the configuration shown in FIG. 13A. Further, the MPU time stamp descriptor has a configuration shown in FIG. 13B.

  For this reason, in the broadcast receiving apparatus 100 of the present embodiment, the “reference_timestamp” parameter, the “transmit_timestamp” parameter, or the “mpu_presentation_time” parameter is referred to, and according to the value of the referred time data or the like, One of the first calculation method and the second calculation method may be selected. That is, for example, when the most significant bit of the 64-bit NTP-length time data is “0”, the second calculation method is used. When the most significant bit is not “0”, the first calculation method is used. Yes, etc.

  According to any of the above methods, the broadcast receiving apparatus 100 of the present embodiment can represent a date after “April 23, 2038”.

[Channel selection processing of broadcast receiving device (initial scan)]
The AMT of the broadcasting system according to the present embodiment provides a list of multicast groups of IP packets for receiving the IP packets transmitted by the TLV multiplexing system as distinctly as possible from the IP packets transmitted by the communication line. Shall be. Multiple IP multicast groups can be listed in one service identification. Also, an address mask can be used to efficiently describe consecutive IP addresses.

  In the broadcast receiving apparatus 100 according to the present embodiment, a list of services acquired from the TLV-NIT is stored in a non-volatile memory such as the ROM 103 or the storage unit 110 at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change. And a list of IP multicast groups corresponding to the respective services can be stored in the nonvolatile memory as IP-related information in association with the respective services. I do. By storing the list of services and the IP-related information in a non-volatile memory so that they can be referred to at all times, it is not necessary to re-acquire TLV-NIT or AMT at the time of channel switching, etc. It is possible to do.

  FIG. 14 is a diagram illustrating an example of an operation sequence at the time of channel scanning (rescanning) in the broadcast receiving device 100 according to the present embodiment.

  When the channel scan is started, the reception function execution unit 1102 sets a frequency initial value to the tuner / demodulation unit 131 and instructs the tuner / demodulation unit 131 to tune to the frequency value (S101). When the tuner / demodulation unit 131 succeeds in locking to the set frequency value (S102: Yes), the reception function execution unit 1102 acquires the TLV-NIT from the received signal (S103).

  If the TLV-NIT acquired in the process of S103 is valid data (S104: Yes), the reception function execution unit 1102 acquires information such as a TLV stream ID and an original network ID from the acquired TLV-NIT. (S105). FIG. 15A shows an example of the data structure of TLV-NIT. It is assumed that the information of the TLV stream ID can be obtained from a “tlv_stream_id” parameter, and the information of the original network ID can be obtained from an “original_network_id” parameter. Further, from the distribution system descriptor, distribution system information on the physical conditions of the broadcast transmission path corresponding to each TLV stream ID / original network ID is obtained (S106), and a list of service IDs is obtained from the service list descriptor (S106). S107). FIG. 15B shows an example of the data structure of the satellite distribution system descriptor. FIG. 15C shows an example of the data structure of the service list descriptor. If the TLV-NIT has a plurality of different data such as a TLV stream ID, an original network ID, distribution system information, a list of service IDs, and the like, the processes of S105 to S107 are repeated. Next, the reception function execution unit 1102 creates a service list based on the data such as the TLV stream ID, the original network ID, the distribution system information, and the list of service IDs acquired in the processing of S105 to S107, and creates the service list. The service list is stored in the ROM 103 or the storage unit 110 (updated when re-scanning) (S108).

  Next, the receiving function execution unit 1102 acquires AMT from the received signal (S109), and further acquires a list of IP multicast groups for each service ID stored in the service list (S110). FIG. 15D shows an example of the data structure of the AMT. If the AMT has a list of IP multicast groups for a plurality of service IDs, the process of S110 is repeated. If there are a plurality of AMTs having a list of IP multicast groups related to different service IDs, the processing of S109 to S110 is repeated. Next, the reception function execution unit 1102 stores the list of IP multicast groups acquired in the process of S110 as the IP-related information in the ROM 103 or the storage unit 110 in association with the service ID (updated when rescanning). (S111).

  In the processing of S102, if the tuner / demodulation unit 131 has not succeeded in locking to the set frequency value (S102: No), and the TLV-NIT acquired in the processing of S103 is not valid data. In this case (S104: No), the processing of S105 to S111 is not performed.

  When the processing of S111 is completed, the reception function execution unit 1102 ends the processing if the frequency value set in the tuner / demodulation unit 131 is the final frequency value of the channel scan range (S112: Yes). On the other hand, if the set frequency value is not the final frequency value of the channel scan range (S112: No), the frequency value set in the tuner / demodulation unit 131 is increased (S113), and the processing of S102 to S111 is performed. repeat. If one TLV-NIT can acquire service IDs for all services constituting the broadcast network and can acquire an AMT having a list of IP multicast groups for the service IDs, No processing is required.

  By the above-described series of processing, the broadcast receiving apparatus 100 of the present exemplary embodiment performs a list of services (service list) constituting the broadcast network at the time of channel scanning at the time of initial setting or at the time of re-scanning for setting change. Simultaneously with the creation / update, a list (IP-related information) of the IP multicast groups corresponding to the respective services is created / updated, and can be stored in a nonvolatile memory such as the ROM 103 or the storage unit 110.

  The rescan for the setting change is automatically performed when it is detected that the information in the table has changed by referring to the “version_number” parameter of the TLV-NIT or AMT. May be. When a change in one of the “version_number” parameters of the TLV-NIT and the AMT is detected, only the information on the table in which the change in the parameter is detected may be automatically updated. However, when the above-described automatic updating is performed, it is desirable to notify the user that re-scanning has been automatically performed. Further, the user may be notified that the information in the table has changed, and may be made to select whether or not to perform the re-scanning.

[Channel selection processing of broadcast receiving device (channel switching)]
FIG. 16 is a diagram illustrating an example of an operation sequence at the time of channel selection (channel switching) in the broadcast receiving device 100 according to the present embodiment.

  When the user operates a remote controller or the like (not shown) to instruct channel switching, the reception function execution unit 1102 interprets a command transmitted from the remote controller and specifies a service ID of a target service (S201). Next, the reception function execution unit 1102 starts acquiring the AMT from the reception signal of the tuner / demodulation unit 131. If the acquisition of the AMT is successful within the predetermined time (S202: Yes), the information about the list of the IP multicast groups corresponding to the service ID is acquired from the acquired AMT (S204). On the other hand, if the acquisition of the AMT is not successful within the predetermined time (S202: No), the IP corresponding to the service ID is referred to by referring to the IP related information stored in the ROM 103 or the storage unit 110 (S203). Information about the list of multicast groups is acquired (S204). Note that the IP-related information stored in the ROM 103, the storage unit 110, or the like may always be referred to without performing the determination processing in S202.

  Next, the reception function execution unit 1102 starts acquiring the TLV-NIT from the reception signal of the tuner / demodulation unit 131. When the acquisition of the TLV-NIT is successful within the predetermined time (S205: Yes), the distribution system information for acquiring the IP data flow corresponding to the service ID is acquired from the acquired TLV-NIT (S207). On the other hand, if the acquisition of the TLV-NIT has not been successful within the predetermined time (S205: No), the service ID corresponding to the service ID is referred to by referring to the service list stored in the ROM 103 or the storage unit 110 (S206). The distribution system information for acquiring the IP data flow is acquired (S207). Note that the service list stored in the ROM 103, the storage unit 110, or the like may always be referred to without performing the determination processing in S205. After acquiring the distribution system information in the process of S207, the reception function execution unit 1102 controls the tuner / demodulation unit 131 with the frequency value indicated by the acquired distribution system information, and Is received (S208), an MMT data sequence is extracted from the received IP data flow, and output to the separation unit 132.

  In the separating unit 132, the transport processing unit 1102a obtains the MMTP packet whose packet ID is “0” from the input MMT data sequence (S209), and further obtains the MPT included in the obtained MMTP packet. (S210). Next, the transport processing unit 1102a refers to the “MMT_package_id_byte” parameter of the acquired MPT and checks whether the lower 16 bits of the “MMT_package_id_byte” parameter have the same value as the service ID. In the example of the MPT data structure shown in FIG. 17, when the lower 16 bits of the “MMT_package_id_byte” parameter have the same value as the service ID (S211: Yes), the MMTP packet whose packet ID is “0” is It is determined that the packet is an MMTP packet having the data of the program corresponding to the service ID, and the MFU is obtained based on the information of the obtained MPT (S216).

  On the other hand, if the lower 16 bits of the “MMT_package_id_byte” parameter are not the same value as the service ID (S211: No), the MMTP packet whose packet ID is “0” has the MMTP packet having the program data corresponding to the service ID. Judge that it is not a packet. In this case, the transport processing unit 1102a newly obtains the PLT (S212), confirms the obtained PLT, and checks the obtained PLT to determine the packet ID of the MMTP packet transmitting the MPT having the “MMT_package_id_byte” parameter corresponding to the service ID. (X) is confirmed (S213). Further, the transport processing unit 1102a acquires an MMTP packet with a packet ID of “x” from the input MMT data sequence (S214), and acquires an MPT included in the acquired MMTP packet (S215). Further, an MFU is acquired based on the information of the acquired MPT (S216).

  Note that the processing of S212 to S215 may always be performed without performing the processing of S209 to S211. In this case, when the program data corresponding to the service ID is stored in an MMTP packet other than the packet ID “0”, the processing time can be reduced.

  When the MFU is acquired in the processing of S216, the transport processing unit 1102a extracts encoded video data, encoded audio data, and the like from the acquired MFU, and outputs the extracted encoded data to the video decoder 141, the audio decoder 143, and the like. Hereinafter, a video / audio decoding process based on the control of the AV decoding processing unit 1102b and a presentation process based on the control of the presentation processing unit 1102h are performed.

  Through the above series of processing, the broadcast receiving apparatus 100 of the present embodiment can execute a channel selection (channel switching) operation. In particular, as described with reference to FIGS. 14 and 16, at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change, a service list and IP-related information are created, and the ROM 103 and the storage unit are created. By storing the service list and the IP related information stored in the non-volatile memory such as the ROM 103 or the storage unit 110 at the time of channel selection (channel switching) by storing it in the non-volatile memory such as 110 and always referring to it, Operation efficiency at the time of channel selection (channel switching) can be improved. That is, it is possible to reduce the time from the start of channel selection (channel switching) to the end of channel selection (channel switching), as compared with the case where AMT or TLV-NIT is reacquired at the time of channel selection (channel switching). Become.

[Screen layout control of broadcast receiving device]
In the broadcast receiving apparatus 100 of the present embodiment, it is assumed that screen layout control based on the description of the LCT is possible. FIG. 18 shows an example of the data structure of the LCT.

  In the figure, in particular, the “left_top_pos_x” parameter and the “right_down_pos_x” parameter represent the upper left horizontal position and the lower right horizontal position of the area when the left side of the full screen display is “0” / the right side is “100”. Each is shown as a ratio to the total number of pixels in the horizontal direction. The “left_top_pos_y” parameter and the “right_down_pos_y” parameter are the vertical position of the upper left and the lower right of the area when the upper side of the full screen display is “0” / the lower side is “100”, respectively. It is shown as a ratio to the total number of pixels. The “layer_order” parameter indicates the relative position of the area in the depth direction.

  19A to 19D show examples of layout assignment to layout numbers based on the settings of the parameters, together with the setting values of the parameters.

  FIG. 19A shows a default layout setting of the broadcast receiving apparatus 100 according to the present embodiment, in which only one area is set on the entire screen. FIG. 19B shows an example in which the entire screen is divided into three regions, and the respective regions are “region 0”, “region 1”, and “region 2”. For example, when the number of pixels of the entire screen is 7680 horizontal pixels / 4320 vertical pixels, the “left_top_pos_x” parameter of the “region 0” is “0”, the “left_top_pos_y” parameter is “0”, and the “right_down_pos_x” parameter is “80”. ”,“ Right_down_pos_y ”parameter is“ 80 ”, so that it is set in the range of (0, 0) − (6143, 3455). Similarly, “region 1” is set in the range of (6144, 0) − (7679, 4319), and “region 2” is set in the range of (0, 3456) − (6143, 4319).

  FIG. 19C is an example in which three areas are set as in FIG. 19B, but “area 0” is set in the range of (0, 0) − (7679, 4319), and “area 1” and “area “2” is in the same range as described above, and is arranged in front of “region 0” according to the setting of the “layer_order” parameter. FIG. 19D shows that “area 0” is set for device 0 (default device: broadcast receiving apparatus 100 in this embodiment), and “area 1” is set for device 1 (mobile information terminal 700 in this embodiment). This is an example of the case in which it is performed.

  As described above, in the broadcasting system of the present embodiment, by using the LCT, it is possible to perform screen layout control for displaying a multimedia service on a receiver as intended by the service provider.

  Note that the fractional part after the decimal point generated when the screen is divided according to the setting value of the parameter such as “left_top_pos_x” may be rounded up or down. Rounding (or rounding to zero in a binary number) may be performed. For example, the number of pixels of the entire screen is 7680 pixels / vertical 4320 pixels, and the “left_top_pos_x” parameter of “region 0” is “0”, the “left_top_pos_y” parameter is “0”, the “right_down_pos_x” parameters are “51”, and “right_down_low_down_low_low_down”. Parameter is “51”, “area 0” may be set in the range of (0, 0) − (3916, 2203) by round-up processing, or (0, 0) − (3915, “Area 0” may be set in the range of 2202). In addition, round-up / round-down processing may be performed in units of 8 pixels, 16 pixels, or the like in consideration of macroblocks at the time of video compression processing. With the above processing, it is possible to efficiently perform area setting based on LCT and resolution conversion processing of multimedia content in the area.

[Exception handling of screen layout control of broadcast receiving device]
In the broadcast receiving apparatus 100 of the present embodiment, even when the area of the screen layout is controlled by the above-described LCT, when the user instructs the display of the EPG screen or the like, as an exception process, It is assumed that it is possible to perform screen layout control ignoring the description contents of the LCT. FIG. 20A shows an example of the operation of exception processing of screen layout control based on LCT.

  The screen layout control similar to that of FIG. 19B is performed by the description of the LCT, the broadcast program video is displayed in “area 0”, and the broadcast of program cooperation data or the like associated with the broadcast program is displayed in “area 1” and “area 2”. When the user instructs the display of the EPG screen with a remote controller (not shown) in a state where the content is displayed, the broadcast receiving apparatus 100 of this embodiment uses the LCT description as shown in FIG. 20A (A). Regardless of the content, the screen layout setting is returned to the default setting (that is, the state in which the same screen layout control as in FIG. 19A is performed), and control is performed so that the EPG screen is displayed on the entire screen. Further, when the user instructs the end of the display of the EPG screen, the screen layout control according to the description contents of the LCT is re-executed.

  By performing the above-described control, the EPG screen can be displayed larger than in the case where the EPG screen is displayed while maintaining the area control of the screen layout as shown in FIG. 20A (B). It is possible to improve the visibility.

  The exception processing of the screen layout control is not applied only when the EPG screen is displayed. As shown in FIG. 20B, various setting screens of the broadcast receiving apparatus 100 (recording setting screen in the illustrated example) are used. ) May be applied at the time of displaying a small screen or at the time of displaying two screens.

  In the case of the recording setting screen shown in FIG. 7A, the display area of the broadcast content is changed from the entire screen to only the small screen part at the lower right of the screen. Similarly, in the case of the two-screen display shown in FIG. 9B, the display area of the broadcast content is changed from the entire screen to only the split screen portion on the middle left side of the screen. In any case, the display area for displaying the broadcast content is narrower than when the entire screen is used. Therefore, the area control of the screen layout is maintained in the display area (that is, the area division is performed). It is not preferable from the viewpoint of visual recognition to keep a plurality of broadcast contents displayed simultaneously). Therefore, in the broadcast receiving apparatus 100 of the present embodiment, in the above situation, only the broadcast content of “area 0” is selected and displayed in the display area. Note that the broadcast content of “region 1” or “region 2” may be selected and displayed according to the region selection status immediately before.

  By performing the above-described control, it is possible to improve the visibility of the broadcast content as compared with the case where various broadcast contents are displayed while maintaining the area control of the screen layout. The same applies to the display of a sub-screen on the recorded program list screen or the display of a browser of Internet content.

[EPG display of broadcast receiving device]
In the broadcasting system of the present embodiment, it is assumed that time-series information on events (so-called programs) included in each service configuring the broadcasting network is transmitted by MH-EIT. FIG. 21 shows an example of the data structure of the MH-EIT of this embodiment. The MH-EIT is identified into two classes by a table ID (corresponding to the "talbe_id" parameter in the figure), and indicates information on the current / next event of the own TLV stream and schedule information of each event of the own TLV stream. Is possible. The broadcast receiving apparatus 100 according to the present embodiment refers to the MH-EIT or the like and performs identification by a service ID (corresponding to the “service_id” parameter in the figure), thereby providing information such as the start time and broadcast time of each event. And an EPG screen can be created by acquiring the EPG, and the created EPG can be superimposed on video information or the like by the video synthesizing unit 161 and displayed on the monitor unit 162.

  FIG. 22A is a diagram illustrating an example of an EPG screen in the broadcast receiving device 100 according to the present embodiment. The EPG screen 162a has a matrix shape in which the vertical axis indicates time and the horizontal axis indicates service ID (channel), and displays detailed information of a broadcast program broadcast on each channel in each time zone. The detailed information 162a1 of each broadcast program mainly includes a title area 162a2 and a detailed explanation area 162a3.

  The title area 162a2 displays a program title of the broadcast program, a symbol indicating an attribute of the broadcast program, and the like. The symbol or the like representing the attribute of the broadcast program is, for example, a symbol / character indicating a new program or a symbol / character indicating a rebroadcast program. Alternatively, it may be a mark obtained by encoding “data”, which means that data broadcasting by a broadcasting service is supported. Further, a mark 162a4 or the like obtained by encoding “NetWork”, which means that contents, applications, and the like related to the broadcast program can be obtained from a network, may be used. Further, by differentiating the background color of the detailed information 162a1 from the others, or by enclosing the display area of the detailed information 162a1 with a thick frame, a symbol or the like indicating the attribute of the broadcast program may be substituted.

  In this case, each control information (message, table, descriptor, etc.) in the broadcasting system of the present embodiment indicates that contents, applications, and the like related to the broadcast program can be obtained from the network. However, when the LAN communication unit 121 of the broadcast receiving apparatus 100 is in a state where access to each server device on the network is not possible, such as when the LAN cable is not connected, the mark 162a4 that symbolizes the “NetWork” is used. May be controlled so as not to be displayed.

  Further, the broadcast program is a distribution program distributed via the Internet 200, and cannot be obtained only from the broadcast wave. In a case where it is not possible to access the EPG screen 162b, for example, as shown in FIG. 22B, the part of the detailed information 162b1 displayed on the EPG screen 162b may be controlled to be grayed out. That is, control is performed so that detailed information of a broadcast program that cannot be viewed is not displayed. In addition, the background color of the detailed information 162b1 may be differentiated from the others, and may be used as an alternative to the gray-out processing. When the detailed information 162b1 is selected by operating a remote controller (not shown), it is indicated that the broadcast receiving apparatus 100 cannot access each server device on the network, or the broadcast program associated with the detailed information 162b1 is viewed. The user may be notified of the inability to do so by a pop-up or the like.

  By the above-described respective controls, the broadcast receiving apparatus 100 can provide the program information of each broadcast program to the user in a format that does not make the user feel uncomfortable according to the network connection status.

  FIG. 22C is a diagram illustrating another example of the EPG screen in the broadcast receiving device 100 according to the present embodiment. In the figure, “M1 TV”, “M2 Broadcast”, “M3 Channel”, “M4TV”, “TV M5”, etc. are the broadcast station names of the respective channels. It is assumed that a broadcast program to be distributed and a distribution program to be distributed via the Internet 200 (information 162c1 in a frame indicated by “net broadcast” in the drawing) are simultaneously provided.

  As shown in the drawing, when there is a channel having only a distribution program to be distributed via the Internet 200, all channels (including information 162c1) are normally displayed as shown on an EPG screen 162c of FIG. Is controlled to display the information. On the other hand, when the broadcast receiving device 100 cannot access each server device on the network or the like, as shown on the EPG screen 162d of FIG. Control may be performed so that the information of the channel of “M2 broadcast (net broadcast)” (information 162c1 in FIG. 7A) is not displayed.

  By the above-described respective controls, the user of the broadcast receiving apparatus 100 can eliminate the need to check information of a channel that the user cannot view.

[Emergency alert broadcast display on broadcast receiver]
The broadcast receiving apparatus 100 according to the present embodiment performs an emergency alert broadcast reception process when the emergency alert broadcast start control signal bit of the TMCC signal included in the transmission data including the TLV stream changes from “0” to “1”. It can be done.

  The emergency alert broadcast may be provided as a full-screen display application, or may be provided as text information in text superimposition. When the emergency alert broadcast is provided in text superimposition as text information, it is preferable to display the text information of the text superimposed regardless of the state of the broadcast receiving apparatus 100 immediately before receiving the emergency alert broadcast. That is, as shown in FIG. 23, when the user watches a normal broadcast program and receives an emergency alert broadcast while the program screen 162e of the broadcast program is displayed on the monitor unit 162, the emergency alert broadcast is performed. Character information 162e1 is displayed so as to be superimposed on program screen 162e. Similarly, when the user instructs display of the EPG screen and receives an emergency alert broadcast with the EPG screen 162f displayed on the monitor unit 162, the character information 162f1 based on the emergency alert broadcast is superimposed on the EPG screen 162f. Control to display.

  With the above-described control, in the broadcast receiving apparatus 100 of the present embodiment, even when the user selects and displays the EPG screen, various setting screens, the recorded program list screen, the Internet browser, or the like, the emergency alert broadcast is performed. Is received, important character information based on the emergency alert broadcast can be prevented from being overlooked. Note that this control may be performed on character information of ordinary character superimpositions not based on emergency alert broadcasting.

[Various exception handling]
If the broadcast receiving apparatus 100 of the present embodiment cannot acquire data outside the TLV stream in the same package, for example, the following exception processing may be performed.

  As described with reference to FIG. 6E, in the broadcast system to which the broadcast receiving device 100 according to the present embodiment corresponds, based on the location information (corresponding to “MMT_general_location_info ()” in FIG. 17) stored in the MPT, the TLV stream The data to be obtained and the data to be obtained through a route other than the TLV stream can be included in the same package. However, a data transmission path other than the TLV stream (for example, an IPv4 data flow, an IPv6 data flow, a broadcast MPEG2-TS, etc.) indicated by the location information is a different reception function from the reception function of the TLV / MMT stream. Therefore, even when the broadcast receiving apparatus 100 is in operation, the receiving function of these transmission paths is not operating, or the receiving function itself is operating but the relay apparatus is not operating, There may be situations in which data cannot be obtained from these transmission paths, such as a situation in which the transmission paths are not wired or wirelessly connected, or a situation in which the broadcast receiving apparatus 100 is installed in an environment where these transmission paths cannot be connected in the first place. .

  Under such a circumstance, an event indicating that the location information stored in the MPT associates the data acquired in the TLV stream with the data acquired in a route other than the TLV stream so as to be included in the same package. When receiving, the broadcast receiving apparatus 100 of the present embodiment may perform the following operation, for example.

  For example, as shown in FIG. 19B and FIG. 19C, the LCT sets a plurality of regions in the screen, displays the video included in the TLV stream in “region 0”, and displays the image in “region 1” and “region 2”. Is associated so that data obtained through a transmission path other than the TLV stream is displayed, and the data of the transmission path other than the TLV stream to be displayed in the “region 1” or the “region 2” is displayed. If it cannot be acquired, layout display of a plurality of areas specified by the LCT may be prohibited. Specifically, even if the LCT is received, the video of the content received in the TLV stream is displayed in the “area 0” of the default layout display shown in FIG. 19A, and as shown in FIGS. 19B and 19C. What is necessary is just to avoid shifting to the layout display of a plurality of regions. Further, in this state, even if a change instruction from the default layout to the layout indicated by the LCT is input to the operation input unit 170 in FIG. 7A, the default layout display shown in FIG. 19B, the display may not be shifted to the layout display of a plurality of regions as shown in FIGS. 19B and 19C.

  The LCT sets a plurality of regions in the screen as shown in FIG. 19B and FIG. 19C, displays the video included in the TLV stream in “region 0”, and displays the video in “region 1” and “region 2”. This is a case where data acquired on a transmission path other than the TLV stream is associated so as to be displayed, and data on a transmission path other than the TLV stream to be displayed in “region 1” or “region 2” cannot be acquired. As another operation example of the case, the display frames of a plurality of regions in FIG. 19B and FIG. 19C indicated by the LCT are displayed once, and the background color and a predetermined still image are displayed for “region 1” and “region 2”. If the data of the transmission path other than the TLV stream indicated by the location information of the MPT cannot be obtained even after the lapse of the predetermined time, the display is switched to the default layout display state shown in FIG. 19A. And it may be. In this case, if the program video included in the TLV stream is continuously displayed in “area 0” even when the layout of FIGS. 19A, 19B, and 19C is changed, the user's program video itself can be displayed. Is preferred because it continues.

  Further, since data of a transmission path other than the TLV stream to be displayed in “region 1” or “region 2” cannot be obtained, the content received in the TLV stream in “region 0” of the default layout display shown in FIG. 19A. Of the broadcast receiving apparatus 100 of this embodiment, the operation of various communication functions and various reception functions starts, the communication environment of various communication functions, the communication status and the various reception functions. Due to a change in the reception environment or the reception state, a situation may occur in which data on a transmission path other than the TLV stream to be displayed in “region 1” or “region 2” can be obtained. In this case, the broadcast receiving apparatus 100 of the present embodiment immediately switches from the default layout display shown in FIG. 19A to the layout of a plurality of areas shown in FIG. 19B and FIG. The video of the content received in the stream may be displayed, and switching may be performed so that data acquired from a transmission path other than the TLV stream is displayed in “region 1” or “region 2”. Further, the layout change may not be performed immediately, but may be performed after a change instruction from the default layout to the layout indicated by the LCT is input from the operation input unit 170.

[Copyright protection function]
In the digital broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment, by transmitting copy control information to the MPT, for example, the copy control information allows “unlimited copy permitted” (“unlimited copy permitted and stored And may be divided into two types: "encryption required for output" and "unlimited copy and no encryption required for storage and output"), "copy of only one generation", "copy a predetermined number of times" ( For example, the content may be transmitted by indicating the copy control state of the content referred to by the MPT, such as "dubbing 10" if the copy is permitted 9 times and the move is permitted once, or "copy prohibited". In this case, according to the copy control information, the broadcast receiving apparatus 100 according to the present embodiment stores the content in the storage (storage) unit 110, records the content on a removable recording medium, outputs the content to an external device, and outputs the content to the external device. It may be configured to control copying, move processing to an external device, and the like. It should be noted that the storage processing target may include not only the storage (storage) unit 110 inside the broadcast receiving apparatus 100 but also a record that has been subjected to a protection processing such as an encryption processing so that it can be reproduced only by the broadcast receiving apparatus 100. . Specifically, the target of the accumulation processing includes an external recording device or the like that can be recorded and reproduced only by the broadcast receiving device 100.

  A specific example of the process based on the copy control information will be described below.

  First, when the copy control information included in the MPT indicates “unlimited copy permitted”, the broadcast receiving apparatus 100 according to the present embodiment stores in the storage (storage) unit 110, records in the removable recording medium, Output to the external device, copying to the external device, and move processing to the external device may be performed without restriction. However, if "unlimited copy is allowed and encryption processing is required for accumulation and output" and "unlimited copy is allowed and encryption processing is not required for accumulation and output", "unlimited copy is allowed and accumulation and output is required" Sometimes encryption processing is required ”, the number of times of storage in the storage (storage) unit 110, recording on a removable recording medium, output to an external device, copying to an external device, and moving to an external device is limited to the number of times. However, it is necessary to perform an encryption process.

  Further, when the copy control information included in the MPT indicates “copying is possible for only one generation”, the broadcast receiving apparatus 100 of the present embodiment enables the storage (storage) unit 110 to encrypt and store. When outputting the stored content to an external device for viewing, the content is encrypted and output together with copy control information of “copy prohibited”. However, so-called move processing (processing of copying content to the external device and making the content in the storage (storage) unit 110 of the broadcast receiving apparatus 100 unreproducible by erasing or the like) to the external device is possible.

  Further, when the copy control information included in the MPT indicates “copying is possible a predetermined number of times”, the broadcast receiving apparatus 100 of the present embodiment can encrypt and store the encrypted data in the storage (storage) unit 110. When outputting the stored content to an external device for viewing, the content is encrypted and output together with copy control information of “copy prohibited”. However, a predetermined number of copies and move processing may be made possible to an external device. In the case of the so-called “dubbing 10”, nine copies and one move process may be performed on the external device.

  When the copy control information included in the MPT indicates “copy prohibited”, the broadcast receiving apparatus 100 of the present embodiment prohibits copying to the storage (storage) unit 110. However, the broadcast receiving apparatus 100 stores (accumulates) the storage (storage) unit 110 only for a predetermined period of time or for a predetermined period of time specified by control information (for example, the MH-Expire descriptor shown in FIG. 6D) included in the broadcast signal. In the case where the apparatus is configured to have a “temporary storage” mode that enables the storage in the storage (storage) unit 110 even if the copy control information included in the MPT indicates “copy prohibited”. This makes it possible to temporarily hold the content. If the copy control information included in the MPT is “copy prohibited” and the content is output for viewing to an external device, the content is encrypted and output together with the “copy prohibited” copy control information.

  The output for viewing to the external device described above may be performed via the video output unit 163 and the audio output unit 166 in FIG. 7A, the digital I / F unit 125, the LAN communication unit 121, and the like. The above-described copy or move process to the external device may be performed via the digital I / F unit 125 and the LAN communication unit 121 in FIG. 7A.

  According to the processing described above, appropriate content protection can be realized according to the copy control information associated with the content.

  Also, a process of copying contents whose copy control information indicates copy restrictions such as “copy permitted for one generation”, “copy permitted a predetermined number of times”, and “copy prohibited” to an external device via the LAN communication unit 121 is performed. Is allowed only when the IP address of the external device, which is the destination of the transmission packet from the broadcast receiving device 100, is in the same subnet as the IP address of the broadcast receiving device 100, and the IP address of the external device is If it is outside the same subnet as the IP address of 100, it may be prohibited. The content whose copy control information is “unlimited copy permitted and requires encryption processing upon accumulation and output” may be handled in the same manner.

  Similarly, once the copy control information indicates a copy restriction such as "copy permitted only for one generation", "copy permitted a predetermined number of times", "copy permitted unlimitedly and requires encryption processing when storing and outputting", After the data is stored in the storage (storage) unit 110, the process of moving to the external device via the LAN communication unit 121 is performed in such a manner that the IP address of the external device, which is the destination of the transmission packet from the broadcast receiving device 100, is not changed. May be enabled only when the IP address is within the same subnet as the IP address of the broadcast receiving device, and may be prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100.

  The viewing video output and the audio output of the content stored in the storage (storage) unit 110 of the broadcast receiving apparatus 100 are, in principle, performed when the IP address of the external device that is the destination of the transmission packet from the broadcast receiving apparatus 100 corresponds to the broadcast reception. This is possible only when the IP address of the apparatus 100 is in the same subnet as the IP address of the apparatus 100, and is prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100. However, the external device is connected within the predetermined period within the same subnet as the IP address of the broadcast receiving device 100, and is registered as a device that can be viewed even outside the same subnet as the IP address of the broadcast receiving device 100. In the case of a device that has been (paired), even if the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100, storage (storage) of the broadcast receiving device 100 in the external device is performed. The configuration may be such that video output for viewing and audio output of the content stored in the unit 110 are enabled. In this case, the viewing video output and audio output are performed by encrypting the content.

  According to the processing described above, by performing different processing depending on whether the external device is in the same subnet as or outside the same subnet as the IP address of the broadcast receiving apparatus 100, it is possible to achieve both user convenience and content protection. Can be realized.

  Next, as described with reference to FIG. 6E, in the digital broadcasting system to which the broadcast receiving apparatus 100 according to the present embodiment corresponds, the location information in the MPT (“MMT_general_location_info ()” in FIG. 17) is used to transmit the TLV stream on the broadcast path. Data obtained by a different path (IPv4, IPv6, MPEG2-TS, URL, etc.) from the obtained data may be included in the same package and the same event as the data obtained by the TLV stream. A description will be given of content protection when control information is included.

  First, when the copy control information is included in the MPT, data included in the same package and the same event in the location information is transmitted through a different path (IPv4, IPv6, MPEG2-TS, URL, etc.) from the data acquired in the TLV stream of the broadcast path. ) May be controlled according to the copy control information included in the TLV stream. As described above, the copy control status of the content specified by the copy control information includes “unlimited copy permitted” (“unlimited copy permitted and encryption required at accumulation and output” and “unlimited copy permitted” And may be divided into two types: encryption is unnecessary at the time of accumulation and output), "copying is possible only for one generation", "copying is possible a predetermined number of times" (for example, if copying is allowed 9 times + move is allowed once, the so-called " Dubbing 10 ")," copy prohibited ", etc. can be designated.

  Here, when the position of the data indicated by the location information includes MPEG2-TS data transmitted by another digital broadcast signal, the MPEG2-TS data is associated with the copy control information even in another digital broadcast signal. It has been broadcast. Then, there is a problem as to what information and how to perform the copy control of the MPEG2-TS data (whether to follow the copy control information included in the TLV / MMT stream or to follow the copy control information included in the MPEG2-TS). .

  In the digital broadcasting system according to the present embodiment, as a solution to this problem, the broadcast receiving device 100 may perform any one of the following multiple solutions.

<Operation example 1>
In the first operation example, when the copy control information is included in the MPT and the data included in the same package and the same event in the location information includes the MPEG2-TS data transmitted by another digital broadcast signal, the MPEG2-TS The copy control state indicated by the copy control information included in the TLV stream is prioritized over the copy control state indicated by the copy control information included in the TS.

  For example, the copy control status indicated by the copy control information included in the TLV stream is “1 generation copy permitted”, and the copy control status indicated by the copy control information included in the MPEG2-TS is “predetermined multiple times permitted”. If there is, even if the data is obtained through a different path (digital broadcasting in the MPEG2-TS transmission format) from the data obtained in the TLV stream, copy control may be performed as “1st generation copy permitted” content. For example, the copy control state indicated by the copy control information included in the TLV stream is “unlimited copy permitted”, and the copy control state indicated by the copy control information included in the MPEG2-TS is “predetermined multiple times permitted”. If there is, even if the data is obtained through a different path (digital broadcasting in the MPEG2-TS transmission format) from the data obtained in the TLV stream, copy control may be performed as “unlimited copy permitted” content.

  In the case of this operation, data acquired by a route other than the TLV stream can be set to a copy state that the broadcast receiving apparatus 100 of the present embodiment wants to manage in a corresponding broadcast system.

<Operation example 2>
In the second operation example, when the copy control information is included in the MPT and the data included in the same package and the same event in the location information includes the MPEG2-TS data transmitted by another digital broadcast signal, the TLV stream Is compared with the copy control state indicated by the copy control information included in the MPEG2-TS, and the copy control state indicated by the copy control information included in the MPEG2-TS is compared with the copy control state indicated by the copy control information included in the MPEG2-TS. Is more severe than the copy control status indicated by the copy control information included in the TLV stream, the storage processing in the storage (storage) unit 110, the recording processing in the removable recording medium, or the output processing from the digital interface is performed. When processing the MPEG2-TS data, It operates to exclude the content.

  In the case of this operation, for data obtained through a route other than the TLV stream, the copy on the broadcast receiving apparatus 100 of the present embodiment is performed while respecting the original copy control information set in the broadcast system transmitting the data. Overlap of control states can be eliminated.

  In addition, as a result of the comparison, when the copy control state indicated by the copy control information included in the MPEG2-TS is the same as or lower than the copy control state indicated by the copy control information included in the TLV stream For example, the copy control may be performed on the MPEG2-TS data included in the same package and the same event in the location information as the content in the copy control state indicated by the copy control information included in the TLV stream.

  In the case of this operation, for data obtained through a route other than the TLV stream, the copy on the broadcast receiving apparatus 100 of the present embodiment is performed while respecting the original copy control information set in the broadcast system transmitting the data. Overlap of control states can be eliminated.

  In the above description, the copyright protection function of the broadcast receiving apparatus 100 according to the present embodiment has been described as being performed based on the copy control information included in the MPT. However, the table in which copy control information is arranged is not limited to MPT. In addition to the MPT, the MH-service description table (MH-SDT) or the MH-event information table (MH-EIT) described in FIG. Copyright protection processing may be performed.

According to the present embodiment described above, a broadcast receiver compatible with MMT digital broadcasting can be provided.
(Example 2)

  Hereinafter, a second embodiment of the present invention will be described. The configuration, processing, effects, and the like in this embodiment are the same as those in the first embodiment unless otherwise specified. Therefore, in the following, differences between the present embodiment and the first embodiment will be mainly described, and description of common points will be omitted as much as possible to avoid duplication. Also, the following description will be made assuming that the broadcast receiving apparatus of the present embodiment is a television receiver that supports both the MMT method and the MPEG2-TS method as the media transport method.

[Hardware configuration of broadcast receiving device]
FIG. 24 is a block diagram illustrating an example of the internal configuration of the broadcast receiving device 800. The broadcast receiving apparatus 800 includes a main control unit 801, a system bus 802, a ROM 803, a RAM 804, a storage unit 810, a LAN communication unit 821, an extension interface unit 824, a digital interface unit 825, a first tuner / demodulation unit 831, a second tuner / Demodulation unit 832, MMT decoding processing unit 841, MPEG2-TS decoding processing unit 842, video synthesis unit 861, monitor unit 862, video output unit 863, audio synthesis unit 864, speaker unit 865, audio output unit 866, operation input unit 870 , Is composed.

  Main control unit 801, system bus 802, ROM 803, RAM 804, storage unit 810, extension interface unit 824, digital interface unit 825, monitor unit 862, video output unit 863, speaker unit 865, audio output unit 866, operation input unit 870, The main control unit 101, the system bus 102, the ROM 103, the RAM 104, the storage (storage) unit 110, the extension interface unit 124, the digital interface unit 125, the monitor unit 162, and the video output unit 163 in the broadcast receiving apparatus 100 according to the first embodiment. , The speaker unit 165, the audio output unit 166, the operation input unit 170, etc., and have the same functions, and a detailed description thereof will be omitted.

  The first tuner / demodulator 831 receives, via an antenna (not shown), a broadcast wave of a broadcast service employing MMT as a media transport method, and provides a service desired by the user based on the control of the main controller 801. Tune to (tune to) the channel. Further, the first tuner / demodulator 831 demodulates the received broadcast signal to obtain an MMT data sequence, and outputs it to the MMT decode processor 841. The second tuner / demodulator 832 receives a broadcast wave of a broadcast service adopting MPEG2-TS as a media transport system via an antenna (not shown), and receives a broadcast wave of a user based on the control of the main controller 801. Tune to (tune to) the channel of the service you want to use. Further, the second tuner / demodulation unit 832 demodulates the received broadcast signal to obtain an MPEG2-TS data sequence, and outputs it to the MPEG2-TS decode processing unit 842.

  The MMT decoding processing unit 841 receives the MMT data sequence output from the first tuner / demodulation unit 831 and, based on a control signal included in the MMT data sequence, a video data sequence, an audio data sequence, It performs separation processing and decoding processing of a character super data string, caption data string, and the like. The MMT decoding processing unit 841 includes the separating unit 132, the video decoder 141, the video gamut conversion unit 142, the audio decoder 143, the character super decoder 144, the subtitle decoder 145, the subtitle synthesis unit 146, It has functions corresponding to the subtitle color gamut conversion unit 147, the data decoder 151, the cache unit 152, the application control unit 153, the browser unit 154, the application color gamut conversion unit 155, the sound source unit 156, and the like. The MMT decoding processing unit 841 can perform various processes described in the first embodiment. The details of the various processes are the same as those described in the first embodiment, and a description thereof will not be repeated.

  The MPEG2-TS decoding processing unit 842 receives the MPEG2-TS data sequence output from the second tuner / demodulation unit 832, and based on the control signal included in the MPEG2-TS data sequence, the video data as a real-time presentation element. It performs separation processing, decoding processing, and the like on columns, audio data columns, character super data columns, subtitle data columns, and the like. The MPEG2-TS decode processing unit 842 has a function equivalent to that of an IRD (Integrated Receiver Decoder) unit of a conventional television receiver that receives broadcast waves of a broadcast service that employs MPEG2-TS as a media transport method. Detailed description is omitted.

  The video synthesizing unit 861 inputs the video information, subtitle information, and application information output from the MMT decoding processing unit 841 and the video information, subtitle information, and application information output from the MPEG2-TS decoding processing unit 842, Processing such as selection and / or superposition is performed as appropriate. The video synthesizing unit 861 includes a video RAM (not shown), and the monitor unit 862 and the like are driven based on video information and the like input to the video RAM. Further, the video synthesizing unit 861 performs a scaling process, a superimposition process of EPG screen information, and the like as needed based on the control of the main control unit 801. The audio synthesizing unit 164 receives the audio information output from the MMT decoding processing unit 841 and the audio information output from the MPEG2-TS decoding processing unit 842, and performs processing such as appropriate selection and / or mixing.

  The LAN communication unit 821 is connected to the Internet 200 via the router device 200r, and transmits and receives data to and from each server device and other communication devices on the Internet 200. In addition, an MMT data sequence (or a part thereof) and an MPEG2-TS data sequence (or a part thereof) of a program transmitted via a communication line are obtained, and the MMT decoding processing unit 841 and the MPEG2-TS Output to the decode processing unit 842.

[Time display on broadcast receiver]
In the broadcast receiving apparatus 800 of the present embodiment, it is assumed that the current date and the current time can be displayed on the EPG screen and various setting screens. The information on the current date and the current time is transmitted by MH-TOT or the like in a broadcasting service employing MMT as a media transport system, and is transmitted by MPEG-TS in a broadcasting service employing MPEG2-TS as a media transport system. It is transmitted by a TOT (Time Offset Table) provided in SI (Service Information) defined in the two systems. The broadcast receiving apparatus 800 can acquire information on the current date and the current time by referring to the MH-TOT and the TOT.

  In general, when the video synthesizing unit 861 mainly selects video information or the like output from the MMT decoding processing unit 841, the information relating to the current date and current time acquired from the MH-TOT is used. When the video information is superimposed on the video information and the video synthesis unit 861 mainly selects the video information and the like output from the MPEG2-TS decode processing unit 842, the information on the current date and current time acquired from the TOT is used as the information. What is necessary is just to control to superimpose on video information etc.

  However, there is a difference in the encoding / decoding process and the transmission path between the broadcasting service employing MMT as the media transport system and the broadcasting service employing MPEG2-TS as the media transport system. , There is a possibility that inconsistency may occur between the selection of a broadcast service employing MMT as a media transport method and the selection of a broadcast service employing MPEG2-TS as a media transport method. For example, as shown in FIG. 25, an EPG screen 162g that displays channel information of a broadcast service that employs MMT as a media transport method, and an EPG that displays channel information of a broadcast service that employs MPEG2-TS as a media transport method. When the screen display is switched to the screen 162h, there is a possibility that the user may feel a sense of visual discomfort due to the inconsistency caused by the display of the current time being switched from the current time display 162g1 to the current time display 162h1.

  In the broadcast receiving apparatus 800 of the present embodiment, even in the case where the video synthesizing unit 861 mainly selects the video information and the like output from the MMT decoding processing unit 841 in order to prevent the user from feeling unnatural. , And control is performed so that information on the current date and current time obtained from the TOT is superimposed on the video information and the like. That is, control is performed so that the current time information provided by the broadcast service employing the MPEG2-TS as the media transport method is superimposed on the content of the broadcasting service employing the MMT as the media transport method.

  By performing the control, the broadcast receiving apparatus 800 of the present embodiment always displays the current time information obtained by referring to the TOT when displaying the current time. Therefore, even when the user switches between the broadcast service employing MMT as the media transport system and the broadcast service employing MPEG2-TS as the media transport system, the user can feel the visual discomfort due to the inconsistency in the display of the current time. Can be prevented.

  FIG. 26A shows an example of the selection control of the current time information reference source according to the reception status of each broadcast service in the broadcast receiving device 800 of the present embodiment. In the broadcast receiving apparatus 800 of this embodiment, when a broadcast service employing MPEG2-TS as a media transport system is in a receivable state, the current time information is always obtained by referring to the TOT. The MH-TOT is used only when a broadcast service employing MPEG2-TS as a media transport system cannot be received and a broadcast service employing MMT as a media transport system can be received. To control to acquire the current time information.

  Contrary to the above control, the present time information provided by the broadcast service employing the MMT as the media transport method is superimposed on the content of the broadcast service employing the MPEG2-TS as the media transport method. Even if it is controlled, the same effect as described above can be obtained.

  As described above, a case where control is performed so that current time information provided by a broadcast service employing MPEG2-TS as a media transport method is superimposed on content of a broadcast service employing MMT as a media transport method. And control to superimpose the current time information provided by the broadcast service employing the MMT as the media transport method on the content of the broadcast service employing the MPEG2-TS as the media transport method. Also, in the same manner as described in [Time management of broadcast receiving apparatus] in the first embodiment, the current time information can be corrected by referring to the "delta" parameter of the time information in the TMCC extended information area. It is possible.

  In addition, in both cases of the broadcast service adopting the MMT as the media transport system and the broadcast service adopting the MPEG2-TS as the media transport system, the MH-TOT or TOT transmitted by each broadcast service constituting the network is not used. It is conceivable that there is an error due to a failure of the transmission side system or a transmission error. In the broadcast receiving apparatus 800 of this embodiment, as a measure against the error of the MH-TOT or the TOT, when it is determined that the MH-TOT or the TOT obtained from the service being received has an error, the MH-TOT or TOT from any broadcast service or from any broadcast service on another network, and has a function to update the time information of the built-in clock by referring to the current time information And

  FIG. 26B illustrates an example of a process of updating current time information in the broadcast receiving device 800 of the present embodiment when receiving a broadcast service that employs MPEG2-TS as a media transport method. It should be noted that the same processing as the processing shown in the figure can be performed even when a broadcast service employing MMT as the media transport method is being received.

  When updating the time information of the built-in clock in the broadcast receiving apparatus 800 of the present embodiment, first, the reception function execution unit 1102 executes the MPEG2 of the broadcast service currently being received (broadcast service employing MPEG2-TS as the media transport system). -Obtain the TOT from the TS data sequence (S301), and obtain the current time information by referring to the obtained TOT (S302). Next, the reception function execution unit 1102 performs a process of comparing the current time information acquired in the process of S302 with the time information of the internal clock.

  As a result of the comparison process, when the difference between the current time information acquired in the process of S302 and the time information of the internal clock is within a predetermined value (for example, within 3 minutes) (S303: Yes), the reception function execution unit 1102 The time information of the internal clock is updated using the current time information acquired in the process of S302 (S306). On the other hand, as a result of the comparison processing, if the difference between the current time information acquired in the processing of S302 and the time information of the internal clock is not within a predetermined value (S303: No), or the TOT acquired in S301 is included in the data. If the reception function execution unit 1102 has a flag or the like indicating that there is an error, the reception function execution unit 1102 obtains the TOT from the MPEG2-TS data sequence of another broadcast service in the same network, or The MH-TOT is obtained from the MMT data sequence of the broadcast service (broadcast service that employs MMT as the media transport method) (S304), and the current time information is obtained from the obtained TOT or MH-TOT (S305). . The reception function execution unit 1102 may perform the comparison process in S303 again using the current time information acquired in the process in S305.

  According to the above processing, the broadcast receiving apparatus 800 of the present embodiment, when determining that the MH-TOT or TOT obtained from the service being received has an error, from another broadcast service on the same network, or from another broadcast service. By acquiring the MH-TOT or TOT from any broadcast service of the network and referring to the current time information, the time information of the internal clock can be updated.

  Note that if the current time information in which the difference from the time information of the internal clock falls within a predetermined range cannot be obtained by repeating the processing of S304 to S305, such as at the time of initial setting after factory shipment, the processing of S302 is executed. The time information of the internal clock may be set again using the current time information thus obtained. In this way, it is possible to cope with a case where there is an error on the time information side of the internal clock of the broadcast receiving apparatus 800 of the present embodiment.

[EPG display of broadcast receiving device]
Event schedule information of a broadcast service employing MMT as a media transport method is transmitted by MH-EIT or the like. On the other hand, event schedule information of a broadcast service employing MPEG2-TS as a media transport method is transmitted by an EIT (Event Information Table) provided in SI defined in the MPEG-2 system. Therefore, in general, when displaying video information or the like provided by a broadcast service employing the MMT as a media transport system, event schedule information (MH-EIT) of the broadcast service employing the MMT is displayed. ) Can be acquired, and when displaying video information or the like provided by a broadcasting service employing MPEG2-TS as a media transport method, the event schedule information of the broadcasting service employing MPEG2-TS is displayed. (EIT) can be obtained.

  However, the broadcast receiving apparatus 800 of the present embodiment can be used when displaying video information or the like provided by a broadcast service employing MMT as the media transport method, or when using the MPEG2-TS as the media transport method. When displaying video information and the like provided by a broadcasting service employing the above, both the MH-EIT and the EIT can be acquired, thereby improving the usability for the user.

  FIG. 27A illustrates an example of an EPG screen in the broadcast receiving device 800 according to the present embodiment. In the figure, an EPG screen 162i is an EPG screen created based on MH-EIT of a broadcast service employing MMT as a media transport method, and includes “M1 TV”, “M2 broadcast”, “M3 channel”, and “M4TV”. "," Television M5 ", etc. are the names of the broadcasting stations of the broadcasting services that employ MMT as the media transport system. The EPG screen 162j is an EPG screen created based on the EIT of a broadcasting service that employs MPEG2-TS as a media transport method, and includes “T6 TV”, “T7 broadcast”, “T8 channel”, and “T9TV”. , “Television TA” and the like are the names of broadcasting stations of broadcasting services that employ MPEG2-TS as a media transport method.

  For example, when a user operates a remote controller (not shown) to display an EPG screen while viewing a broadcast program provided by a broadcast service employing MMT as a media transport method, an initial screen of the EPG screen (shown in FIG. (Omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on the MH-EIT of a broadcasting service employing MMT as a media transport method, and is described at “17:00 to today” on “October 7, 2014 (today)”. (Near the current time) "is displayed. Next, the user desires to check the detailed information of the broadcast program of each channel from “20:00” on “October 9, 2014”, and instructs to update the EPG screen by operating a remote controller not shown. Then, the EPG screen 162i is displayed.

  Further, when the user desires to confirm detailed information of a broadcast program provided by a broadcast service adopting MPEG2-TS as a media transport system, and operates a remote controller (not shown) to instruct network switching, the EPG The screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of the present embodiment, the initial screen of the EPG screen created based on the EIT of the broadcast service adopting the MPEG2-TS as the media transport system (that is, “EPG screen” "17: 00-", the same time zone as the EPG screen 162i displayed immediately before (that is, "20: 00-" on October 9, 2014). )) To display the detailed information of the broadcast program of each channel.

  According to the above-described control, the user can continuously confirm detailed information on a broadcast program of a plurality of networks of different media transport systems in the same day and at the same time by a simple operation. That is, the usability of the broadcast receiving device 800 is improved.

  FIG. 27B is a diagram illustrating another example of the EPG screen in the broadcast receiving device 800 according to the present embodiment, which is different from the above-described example. The EPG screen 162k shows a state in which the EPG screen 162i shown in FIG. 27A is displayed and scrolled in the channel direction (horizontal direction) by operating a remote controller (not shown). That is, in the example shown in FIG. 27B, by scrolling the EPG screen in the channel direction (horizontal direction), the channel information and the media created based on the MH-EIT of the broadcast service employing the MMT as the media transport system are displayed. Channel information created based on the EIT of a broadcast service employing MPEG2-TS as a transport method is seamlessly displayed on the same time axis.

Therefore, during confirmation of the channel information created by the user based on the MH-EIT of the broadcast service employing the MMT as the media transport system, the user creates the channel information based on the EIT of the broadcast service employing the MPEG2-TS as the media transport system. Even when it is desired to check the channel information, it is possible to eliminate the need to issue a network switching instruction or the like by operating a remote controller (not shown). Furthermore, the user can simultaneously confirm detailed information on broadcast programs on the same day and at the same time on a plurality of networks using different media transport systems. That is, the usability of the broadcast receiving device 800 is improved.
(Example 3)

  Hereinafter, a third embodiment of the present invention will be described. The configuration, effects, and the like in this embodiment are the same as those in the first embodiment unless otherwise specified. Therefore, in the following, differences between the present embodiment and the first embodiment will be mainly described, and description of common points will be omitted as much as possible to avoid duplication.

  It is assumed that the broadcast receiving apparatus 100 according to the present embodiment can support HDR (High Dynamic Range), which is a technique for expanding the luminance width of colors of video content, and color gamut expansion. Further, in the MMT which is a media transport method supported by the broadcast receiving apparatus 100 of the present embodiment, a monitor used by a user (such as the broadcast receiving apparatus 100 of the present embodiment) reproduces an image as intended by a content creator. In order to enable this, it is assumed that the HDR and the content information related to the color gamut expansion can be transmitted together with the encoded data of the program content.

[System configuration]
The system configuration in this embodiment is basically the same as the system configuration shown in FIG. As shown in FIG. 28, the encoded data of the program content included in the broadcast wave transmitted from the radio tower 300t is obtained by temporarily storing the content data output from the photographing device 390c in the broadcast station server 300. Instead of performing the processing, the data may be transmitted after appropriately performing an encoding process, a modulation process, and the like. Alternatively, the content data output from the photographing device 390c is stored in the broadcast station server 300, and the edited content data is subjected to various video / audio editing processing by the editing device 390e. The data may be transmitted after appropriately performing processing and modulation processing.

  The broadcast wave includes, in addition to coded data and character information of program contents, other applications, general-purpose data, and the like, luminance information of the program contents and devices used when creating / editing the program contents ( A content information descriptor that describes information on the color reproduction performance and the like of the photographing device 390c, the monitor device of the editing device 390e, etc.) is used as control information (content information) relating to the program content. It shall be transmitted together with the table / descriptor.

[Data structure of content information descriptor]
FIG. 29A shows an example of the data structure of the content information descriptor. Note that the content information descriptor may be arranged in MPT or MH-EIT. Each parameter in the data structure of the content information descriptor has a function described below.

・ "Descriptor_tag (descriptor tag)"
The descriptor tag has a function of uniquely identifying each descriptor with a 16-bit field.

・ "Descriptor_length (descriptor length)"
The descriptor length shall indicate the total number of data bytes of each parameter following this field.

・ "Component_tag (component tag)"
The component tag is a label for uniquely identifying the component stream, and is described in a 16-bit field. It has the same value as the component tag described in the MH-stream identification descriptor.

・ "Content_type (content type)"
The content type indicates the type of the video content included in the component stream according to FIG. 29B. If this parameter is “0”, it indicates that the video content has been subjected to video editing processing by the editing device 390e (recorded program or the like). If this parameter is “1”, the video content is a video that has been edited by the editing device 390e (recorded program, etc.), and indicates that this content is compatible with HDR. I do. If this parameter is “2”, it indicates that the video content is content data (such as a live broadcast program) output from the photographing device 390c. When this parameter is “3”, it is assumed that the video content is content data (such as a live broadcast program) output from the photographing device 390c and that the content is compatible with HDR. Further, other classification may be performed using this parameter.

-"Source_primaries_rx (source device primary color chromaticity coordinates (Rx))"
"Source_primaries_ry (source device primary color chromaticity coordinates (Ry))"
"Source_primaries_gx (source device primary color chromaticity coordinates (Gx))"
“Source_primaries_gy (source device primary color chromaticity coordinates (Gy))”
"Source_primaries_bx (source device primary color chromaticity coordinates (Bx))"
"Source_primaries_by (source device primary color chromaticity coordinates (By))"

  The source device primary color chromaticity coordinates are parameters indicating information related to the color reproduction performance and the like of the source device, and the color gamut that the source device can support is defined by each primary color of R (red) / G (green) / B (blue). In the CIE chromaticity diagram (CIExy chromaticity diagram). The source device is a monitor device of the editing device 390e when the "content_type" parameter is "0" or "1". In this case, the source device primary color chromaticity coordinates indicate chromaticity coordinate values of a color gamut that can be displayed by the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the source device primary color chromaticity coordinates indicate chromaticity coordinate values of a color gamut that can be output by the photographing device 390c.

  Each coordinate value on the CIE chromaticity diagram is represented by a value in the range of “0.000” to “1.000”, and is described in a range of “0000000000000b” to “1111101000b” in a 10-bit field. Shall be performed. For example, as shown in FIG. In the case of the chromaticity coordinate value of R (red) in the 709 standard, “x = 0.640 (1010000000b)” and “y = 0.330 (0101001010b)” are obtained. For the chromaticity coordinate value of G (green) in the 2020 standard, “x = 0.170 (0010101010b)” and “y = 0.797 (1100011101b)”.

-"Source_white_point_x (source device white chromaticity coordinates (x))"
"Source_white_point_y (source device white chromaticity coordinates (y))"
The source device white chromaticity coordinates are parameters indicating information relating to the color reproduction performance and the like of the source device, and indicate the coordinate values on the CIE chromaticity diagram of the white reference points that the source device can support. The source device is a monitor device of the editing device 390e when the "content_type" parameter is "0" or "1". In this case, the white chromaticity coordinates of the source device indicate chromaticity coordinate values of a white reference point of the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the white chromaticity coordinates of the source device indicate chromaticity coordinate values of a white reference point that can be output by the photographing device 390c.

  Each coordinate value on the CIE chromaticity diagram is represented by a value in a range of “0.00000” to “1.0000”, and described in a 14-bit field in a range of “00000000000000b” to “10011100010000b”. Shall be performed. For example, as shown in FIG. 709 standard and BT. In the case of the chromaticity coordinate value of the white reference point in the 2020 standard, “x = 0.3127 (00110000111011b)” and “y = 0.3290 (00110011011010b)” are obtained.

-"Source_luminance_max (source device maximum brightness)"
"Source_luminance_min (minimum luminance of source device)"
The source device maximum luminance and the source device minimum luminance are parameters indicating information on the maximum luminance and the minimum luminance that the source device can support. The source device is a monitor device of the editing device 390e when the "content_type" parameter is "0" or "1". In this case, the maximum luminance of the source device and the minimum luminance of the source device indicate the maximum value and the minimum value of the luminance that can be displayed on the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the maximum luminance of the source device and the minimum luminance of the source device indicate the maximum value and the minimum value of the luminance that can be output by the photographing device 390c.

The maximum luminance of the source device is indicated by a value in the range of “1 (cd / m ² : candela / square meter)” to “65535 (cd / m ² )”, and “0000h” to “FFFFh” in a 16-bit field. ]. The minimum luminance of the source device is indicated by a value in the range of “0.0001 (cd / m ² )” to “6.5535 (cd / m ² )”, and is “0000h” to “FFFFh” in a 16-bit field. ].

・ "Num_of_scene (number of scenes)"
The number of scenes indicates the number of scenes (which may be referred to as chapters or the like) constituting video content included in the component stream. When the number of scenes is “1”, the description of this parameter may be omitted.

-"Scene_start_time (scene start time)"
The scene start time indicates the start time of a scene (chapter) in a 40-bit field. The upper 16 bits of this field indicate the lower 16 bits of the modified Julian date (MJD), and the lower 24 bits indicate the hour, minute, and second of Japan Standard Time (JST) using a six-digit BCD code. When the number of scenes is “1”, the description of this parameter may be omitted.

・ "Scene_duration (scene duration)"
The scene duration indicates the duration of the scene (chapter) in a 24-bit field. This field indicates the hour, minute, and second of the duration with a six-digit BCD code. When the number of scenes is “1”, the description of this parameter may be omitted.

-"Max_light_level_of_content (content maximum brightness)"
The content maximum luminance indicates the maximum luminance in each scene (chapter) by a 16-bit field. When the number of scenes is “1”, this parameter indicates the maximum value of luminance throughout the entire content. The content maximum luminance is indicated by a value in a range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is described in a 16-bit field in a range of “0000h” to “FFFFh”. Shall be performed.

-"Max_frame_ave_light_level (maximum frame average luminance)"
The maximum frame average luminance indicates the maximum value of the frame average luminance in each scene (chapter) by a 16-bit field. When the number of scenes is “1”, this parameter indicates the maximum value of the average frame luminance throughout the entire content. The maximum frame average luminance is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is a 16-bit field in the range of “0000h” to “FFFFh”. Shall be described.

-"Max_light_level_of_frame (maximum luminance within a frame)"
The maximum luminance in a frame indicates the maximum luminance in each frame by a 16-bit field. The maximum luminance in the frame is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is a 16-bit field in the range of “0000h” to “FFFFh”. Shall be described.

-"Frame_average_light_level (average luminance within a frame)"
The average luminance in a frame indicates the average luminance of each frame in a 16-bit field. The average luminance in a frame is indicated by a value in a range of “1 (cd / m ² )” to “65535 (cd / m ² )”, and is a 16-bit field in a range of “0000h” to “FFFFh”. Shall be described.

・ "EOTF_identification" (EOTF identification)
The EOTF (Electro-Optical Transfer Function) identification identifies a type of a conversion characteristic (transfer characteristic) between an electric signal and an optical signal such as gamma correction applied to a video signal of video content included in a component stream. . For example, in the example shown in FIG. 29D, when this parameter is “0”, the video content is BT. This indicates that gamma correction suitable for a monitor device having a display characteristic conforming to 709 has been performed. When this parameter is “2”, the video content is BT. This indicates that gamma correction of 10-bit processing suitable for a monitor device having 2020-compliant display characteristics has been performed. When this parameter is “3”, the video content is BT. This indicates that gamma correction of 12-bit processing suitable for a monitor device having 2020-compliant display characteristics has been performed. When this parameter is “4”, it indicates that the video content has been subjected to gamma correction suitable for a monitor device having a display characteristic conforming to SMPTE 2084. Further, other classification may be performed using this parameter. The “EOTF identification” parameter may be capable of identifying the type of colorimetry. The type of the conversion characteristic (transfer characteristic) of the electric signal and the optical signal illustrated in FIG. 29D is an example, and the processing of the conversion characteristic (transfer characteristic) of the other electric signal and the optical signal is performed on the video signal of the video content. , May be identified by the “EOTF identification” parameter.

  Here, the broadcast receiving apparatus 100 that has received the video content and the “EOTF identification” parameter refers to the “EOTF identification” parameter associated with the video content, and further displays the display characteristics of the monitor device that displays the video content. And performing appropriate processing such as electro-optical conversion based on the two, it is possible to display each of the video contents in a state suitable for the monitor device. For example, when the transfer characteristic identified by the “EOTF identification” parameter associated with the video content corresponds to the display characteristic of the monitor device that displays the video content, the “EOTF identification” parameter is used in the display processing. The electric-optical conversion identified by the above may be performed as it is. If the transfer characteristic identified by the “EOTF identification” parameter associated with the video content does not correspond to the display characteristic of the monitor device that displays the video content, the transmission characteristic is identified by the “EOTF identification” parameter. Instead of performing the electro-optical conversion as it is, the video signal converted from the electric signal and the optical signal according to the identification of the “EOTF identification” parameter is subjected to the electro-optical conversion corresponding to the display characteristics of the monitor device. After performing the conversion process for converting the image signal into a video signal suitable for the above process, the display process for performing the electro-optical conversion corresponding to the display characteristics of the monitor device may be performed.

  The video signal that has been subjected to the conversion processing between the electric signal and the optical signal according to the identification of the “EOTF identification” parameter is converted into a video signal suitable for the electro-optical conversion processing corresponding to the display characteristics of the monitor device. The conversion process for conversion will be described below. Hereinafter, the above-described processing is referred to as transfer characteristic conversion processing.

  The video content having the “EOTF identification” parameter value of “2”, “3”, or “4” is an HDR video content having a wide expressible light / dark range and color gamut. On the other hand, a video content having a value of “0” in the “EOTF identification” parameter is an SDR (Standard Dynamic Range) video content whose expressible light / dark range, color gamut, and the like are narrower than HDR video content.

  BT. A display device having a display characteristic conforming to 2020 or a display device having a display characteristic conforming to SMPTE 2084 can be referred to as an HDR-compatible display device. In contrast, BT. A display device having a display characteristic conforming to 709 can be referred to as an SDR-compatible display device. Further, BT. 709. A display device having display characteristics conforming to BT.709. A display device that does not support HDR display characteristics such as 2020 or SMPTE 2084 may be referred to as an SDR-compatible display device (an HDR non-compatible display device) as a subordinate concept of the SDR-compatible display device.

  Here, the HDR video content is BT. If the transfer characteristic conversion process is not performed when displaying on an SDR-compatible display device (a non-HDR-compatible display device) such as a monitor device having a display characteristic conforming to the H.709 standard, the wide range of light and shade and color gamut of the HDR video content And the like cannot be completely expressed by the monitor device, resulting in a display image that is hard to see and has brightness loss and color loss. That is, in this case, in the transfer characteristic conversion process, a process of converting the wide light-dark range, color gamut, and the like of the HDR video content into the light-dark range, color gamut, and the like that can be expressed by the monitor device is performed. Good. This processing may be expressed as light-dark dynamic range reduction conversion and color gamut reduction conversion. Also, since HDR video content with a wide expressible light-dark range and color gamut is converted to SDR video content with a narrow expressible light-dark range and color gamut, it is expressed as HDR-SDR conversion processing. Is also good.

  On the other hand, video content having a value of “0” in the “EOTF identification” parameter is an SDR video content having a narrow expressible light / dark range, color gamut, and the like. The SDR video content is stored in a BT. If the transfer characteristic conversion processing is not performed when displaying on a HDR-compatible display device such as a monitor device having a display characteristic based on 2020, the wide light-dark display performance and color gamut display performance of the monitor device should be fully utilized. Can not. That is, in this case, in the transfer characteristic conversion processing, the conversion processing may be performed on the SDR video content so that the wide light-dark display performance, the color gamut display performance, and the like of the monitor device can be fully utilized. This processing may be expressed as light-dark dynamic range expansion conversion and color gamut expansion conversion. Also, since this is a process of converting an SDR video content having a narrow expressible light / dark range and color gamut into an expressible HDR video content having a wide expressible light / dark range and color gamut, it is expressed as an SDR-HDR conversion process. Is also good. Note that the SDR-HDR conversion processing is not always necessary, and the SDR video content is transferred to the BT. When displaying on an HDR-compatible display device such as a monitor device having 2020-compliant display characteristics, the SDR-HDR conversion process does not have to be performed. In this case, the light and dark display performance and the color gamut display performance remain within the range of the display characteristics of the SDR, but there is no problem because the display image does not become hard to see having the luminance collapse and the color collapse.

  The “EOTF identification” parameter is not associated with the video content received by the broadcast receiving apparatus 100 and cannot be acquired (or originally not transmitted), or the “EOTF identification” parameter is not associated with the video content received by the broadcast receiving apparatus 100. As an example of the processing in the case where the value of the “EOTF identification” parameter cannot be determined due to a transmission error or the like and cannot be determined, the following processing may be performed.

  As a first processing example, the value of the “EOTF identification” parameter of the received video content may be treated as, for example, “2” or “3”. That is, when the value of the “EOTF identification” parameter cannot be identified, the video content may be handled as HDR video content. With this configuration, the monitor device is connected to the BT. An HDR-compatible display device such as a monitor device having a display characteristic conforming to 2020 does not perform the transfer characteristic conversion process. However, if the actual content is HDR video content, appropriate display is performed, and the actual content is SDR video content. Even though, the light and dark display performance and the color gamut display performance remain within the range of the display characteristics of the SDR, but the display image does not become hard to see having the luminance collapse and the color collapse. Also, the monitor device is BT. If the display device is an SDR-compatible display device (non-HDR-compatible display device) such as a monitor device having a display characteristic conforming to 709, the transfer characteristic conversion process is performed by treating the video content as an HDR video content. If the content is an HDR video content, the HDR-SDR conversion process is appropriately performed and displayed. Even if the actual content is an SDR video content, the light / dark display performance and the color gamut display performance are out of the range of the display characteristics of the SDR. However, it is possible to avoid a display image that is hard to see with at least the brightness and color loss that cannot express at least the brightness range and color gamut of the video content. (SDR-HDR conversion processing may be performed when the actual content is HDR video content, or HDR-SDR conversion may be performed on an SDR-compatible display device (non-HDR-compatible display device) when the actual content is HDR video content. If the image is displayed as it is without performing it, there is a possibility that such a display image with the brightness collapse and the color collapse that is difficult to see is displayed, but this situation can be avoided in the first processing example.)

  According to the first processing example described above, if the value of the “EOTF identification” parameter cannot be identified, the video content is treated as HDR video content, so that the monitor device is an HDR-compatible display device. Regardless of whether the display is an SDR-compatible display device (non-HDR-compatible display device) or an actual content is an HDR video content or an SDR video content, it is possible to display a video with few problems for the user.

  As another second processing example of the case where the value of the “EOTF identification” parameter cannot be obtained (including a case where the value is not transmitted, a case of a transmission error, and an invalid value), a video component descriptor For example, it may be determined whether to handle as HDR video content or to handle as SDR video content by referring to a parameter related to the resolution of the video signal included in the above.

  For example, even when the value of the “EOTF identification” parameter cannot be identified, the parameter relating to the resolution of the video signal indicates that the resolution of the video content is high-resolution content such as 3840 × 2160 pixels or 7680 × 4320 pixels. If it is indicated, it may be determined that the content is HDR video content. Specifically, what is necessary is just to interpret that the value of the “EOTF identification” parameter is “2” or “3”. Since it is expected that many high-resolution contents of 3840 × 2160 pixels or 7680 × 4320 pixels will be prepared as HDR video contents in the future, appropriate processing is likely to be performed stochastically by such processing.

  Even when the value of the “EOTF identification” parameter cannot be identified, if the parameter related to the resolution of the video signal indicates that the resolution of the video content is 1920 × 1080 pixels or less, the SDR video The content may be determined. Specifically, what is necessary is just to interpret that the value of the “EOTF identification” parameter is “0”. Since a large number of existing SDR contents exist in content having a resolution of 1920 × 1080 pixels or less, appropriate processing is likely to be performed stochastically by such processing.

  According to the second processing example described above, when the value of the “EOTF identification” parameter cannot be identified, a determination is made with reference to the parameter related to the resolution, so that a stochastically appropriate display is easily performed.

  Next, processing when the value of the “EOTF identification” parameter associated with the video content received by the broadcast receiving apparatus 100 is a value for which a relationship with the display characteristics is not prepared in the table of FIG. 29D will be described. Here, the value for which the relationship with the display characteristics is not prepared in the table of FIG. 29D means that the value of the “EOTF identification” parameter in the table of FIG. 29D is “1” or “5” to “15”. This is a case where a reserved value or an unexpected value is stored. These values may be expressed as invalid values. Even in the case of such an invalid value (a value for which a relationship with the display characteristics is not prepared), the same effect can be obtained by performing either the first processing example or the second processing example. Is obtained.

  In the configuration diagram of FIG. 7A, the image gamut conversion unit 142 controlled by the main control unit 101 based on the data separated by the separation unit 132 performs various types of image processing according to the “EOTF identification” parameter described above. Good.

  Here, when the video content to be displayed is switched between the HDR video content and the SDR video content at a program change or channel switching, the timing at which the decoded video from the video decoder 141 in FIG. 7A is switched between the HDR video content and the SDR video content Ideally, the timing at which the video processing of the video gamut conversion unit 142 switches between processing for HDR video content and processing for SDR video content is aligned. However, in practice, it is conceivable that a considerable amount of timing deviation occurs.

  In an HDR-compatible display device that performs SDR-HDR conversion processing on SDR video content, when switching from HDR video content to SDR video content, the timing at which the video processing of the video gamut conversion unit 142 switches is determined by the video decoder 141. If it is earlier than the switching timing of the decoded video, it takes time to perform the SDR-HDR conversion process on the HDR video content, and there is a possibility that a display video that is hard to see with brightness loss or color loss is displayed. . Therefore, when switching from the HDR video content to the SDR video content, the main control unit 101 determines that the switching timing of the video processing of the video gamut conversion unit 142 is later than the switching timing of the decoded video from the video decoder 141. What is necessary is just to control the processing timing of the video decoder 141 and the video gamut converter 142. Alternatively, control may be performed such that the video is set to a video mute state such as black display before switching between the two starts processing, and the video mute state such as black display of the video is released after the switching between the two is completed. .

  In the HDR-compatible display device that performs the SDR-HDR conversion process on the SDR video content, when switching from the SDR video content to the HDR video content, the switching timing of the video processing of the video gamut conversion unit 142 is determined by the video decoder 141. If it is later than the switching timing of the decoded video from the HDR video content, it will take time to perform the SDR-HDR conversion process on the HDR video content, which may cause the display of a hard-to-see display image with brightness loss or color loss. Would. Therefore, when switching from the SDR video content to the HDR video content, the main control unit 101 determines that the switching timing of the video processing of the video gamut conversion unit 142 is earlier than the switching timing of the decoded video from the video decoder 141. What is necessary is just to control the processing timing of the video decoder 141 and the video gamut converter 142. Alternatively, control may be performed such that the video is set to a video mute state such as black display before switching between the two starts processing, and the video mute state such as black display of the video is released after the switching between the two is completed. .

  In an SDR-compatible display device that performs HDR-SDR conversion processing on HDR video content and displays SDR video content without performing transmission characteristic conversion processing, when switching from HDR video content to SDR video content, If the switching timing of the video processing of the color gamut conversion unit 142 is earlier than the switching timing of the decoded video from the video decoder 141, the HDR video content is displayed on the SDR-compatible display device without performing the transfer characteristic conversion process. This causes a possibility that a display image that is hard to see with luminance collapse or color collapse will be displayed. Therefore, when switching from the HDR video content to the SDR video content, the main control unit 101 determines that the switching timing of the video processing of the video gamut conversion unit 142 is later than the switching timing of the decoded video from the video decoder 141. What is necessary is just to control the processing timing of the video decoder 141 and the video gamut converter 142. Alternatively, control may be performed such that the video is set to a video mute state such as black display before switching between the two starts processing, and the video mute state such as black display of the video is released after the switching between the two is completed. .

  In an SDR-compatible display device that performs HDR-SDR conversion processing on HDR video content and displays SDR video content without performing transmission characteristic conversion processing, when switching from SDR video content to HDR video content, If the switching timing of the video processing of the color gamut conversion unit 142 is later than the switching timing of the decoded video from the video decoder 141, the HDR video content is displayed on the SDR-compatible display device without performing the transfer characteristic conversion process. This causes a possibility that a display image that is hard to see with luminance collapse or color collapse will be displayed. Therefore, when switching from the SDR video content to the HDR video content, the main control unit 101 determines that the switching timing of the video processing of the video gamut conversion unit 142 is earlier than the switching timing of the decoded video from the video decoder 141. What is necessary is just to control the processing timing of the video decoder 141 and the video gamut converter 142. Alternatively, control may be performed such that the video is set to a video mute state such as black display before switching between the two starts processing, and the video mute state such as black display of the video is released after the switching between the two is completed. .

  As described above, by performing the processing related to the switching timing of the decoded video and the switching timing of the transfer characteristic conversion processing, it is possible to avoid presenting the user with a display image that is hard to see due to brightness loss or color loss. Becomes

  Instead of or in addition to the identification processing and various video processing using the “EOTF_identification” parameter in the content information descriptor described above, the same identification as the above-mentioned “EOTF_identification” parameter can be performed in the encoded video stream. May be inserted, and identification processing and various video processing using the inserted flag may be performed. The identification processing and various video processing when the “EOTF_identification” flag is used as the flag in the coded video stream are the identification processing and various video processing when the “EOTF_identification” parameter in the content information descriptor is used. In the description, instead of referring to the “EOTF_identification” parameter in the content information descriptor, the description may be made by referring to the “EOTF_identification” flag inserted in the encoded video stream, and a detailed description thereof will be omitted. I do.

  However, if an “EOTF_identification” flag as a flag in the coded video stream is inserted into the coded video stream in, for example, a frame unit, a GOP unit, or the like, the content information descriptor in the asset unit or the program unit is set. Switching between HDR video content and SDR video content and switching between various video processes corresponding to each video content can be realized in smaller time units than when the “EOTF_identification” parameter is used. That is, the video decoder 141 can recognize the switching between the HDR video content and the SDR video content in units of frames or GOPs, and the video color gamut conversion unit 142 in the subsequent stage allows the HDR video contents and the SDR video contents in units of frames or GOPs. Since it is possible to refer to the identification information of the content, the synchronization accuracy of the switching timing of the video processing in the video gamut conversion unit 142 is improved as compared with the case where the “EOTF_identification” parameter in the content information descriptor is used. There is.

  If the transmission of the “EOTF_identification” flag in the encoded video stream and the transmission of the “EOTF_identification” parameter in the content information descriptor are used together, the identification process using the “EOTF_identification” flag in the encoded video stream The “EOTF_identification” parameter in the content information descriptor used for switching the video processing of the video color gamut conversion unit 142 is, for example, a program that is displayed in a program table or in the display of program information. If it is used for display to convey to the user whether the program is an SDR video content program or the like, the identification information of the two can be used properly.

  Further, in the case where the transmission of the “EOTF_identification” flag in the encoded video stream and the transmission of the “EOTF_identification” parameter in the content information descriptor are used in combination, when there is inconsistency in the identification information of the two, The following can be considered. The first processing example is an example in which the “EOTF_identification” flag in the encoded video stream is preferentially used. In this case, there is an advantage that the switching between the HDR video content and the SDR video content as described above can be accurately synchronized with the switching timing of the corresponding video processing. The second processing example is an example in which the “EOTF_identification” parameter in the content information descriptor is preferentially used. In this case, there is an advantage that the transfer characteristics and the like can be quickly identified without referring to the encoded video stream.

  Note that the content information descriptor described above may have a data structure different from that shown in FIG. 29A. For example, another parameter different from the above parameters may be further provided, or not all of the above parameters may be provided. Further, the parameters may have different names. Also, the parameters need not necessarily be described in one descriptor, and may be described in two different descriptors, for example. Each of the parameters may be described in a descriptor and arranged in a table, or may be directly described in the table.

[EPG display of broadcast receiving device]
In the broadcast receiving apparatus 100 according to the present embodiment, similarly to the first embodiment, by identifying the service ID with reference to the MH-EIT or the like, information such as the start time and broadcast time of each event (broadcast program) is obtained. And an EPG screen can be created by acquiring the EPG, and the created EPG can be superimposed on video information or the like by the video synthesizing unit 161 and displayed on the monitor unit 162.

  Further, in the broadcast receiving apparatus 100 according to the present embodiment, referring to the “content_type” parameter or the like of the content information descriptor, if the type of the video content of each broadcast program is “1” or “3”, As shown in FIG. 30, a symbol or the like indicating an attribute indicating that the broadcast program is a program corresponding to HDR may be displayed. The symbol or the like representing the attribute may be, for example, a symbol / character indicating a broadcast program corresponding to HDR, or encoding “HDR” which means a broadcast program corresponding to HDR. The mark 162a5 may be used. The symbol or the like representing the attribute may be displayed in the title area 162a2 of the detailed information 162a1. Alternatively, when the cursor is placed on the detailed information 162a1, a popup may be displayed. It may be displayed by other methods.

  If the content information descriptor has a separate parameter “HDR_flag” indicating whether or not the video content of the broadcast program supports HDR, refer to the “HDR_flag” parameter. By doing so, control may be performed as to whether or not to display a symbol or the like indicating an attribute indicating that the broadcast program is a program corresponding to HDR. Note that the name of the “HDR_flag” parameter is an example, and a different name may be used.

In addition, all or any of the “source_luminance_max” parameter, the “max_light_level_of_content” parameter, the “max_light_level_of_frame” parameter, etc. of the content information descriptor exceeds a predetermined value (for example, “100 (cd / m ² )”). Control may be performed to display a symbol or the like indicating an attribute indicating that the broadcast program is a program corresponding to HDR.

In addition, referring to the “content_type” parameter or the like of the content information descriptor, even if the type of the video content of each broadcast program is “1” or “3”, or “source_luminance_max” of the content information descriptor Even if all or any of the “max_light_level_of_content” parameter, the “max_light_level_of_frame” parameter, the “max_light_level_of_frame” parameter, and the like exceed a predetermined value (for example, “100 (cd / m ² )” or the like), the monitor unit of the broadcast receiving apparatus 100 If 162 does not support HDR, a symbol / character indicating that the program is a broadcast program corresponding to the HDR or a mark 162a5 obtained by symbolizing “HDR” indicating a broadcast program corresponding to the HDR is Control may be performed so as not to show.

  Further, the broadcast receiving apparatus 100 according to the present embodiment refers to the “EOTF_identification” parameter of the content information descriptor, and determines the type of the gamma correction applied to the video content of each broadcast program by the monitor unit 162 of the broadcast receiving apparatus 100. If the type is a type that can be supported by the display characteristics, a symbol or the like indicating an attribute indicating that the broadcast program can be displayed in a correct luminance expression may be displayed. The symbol or the like representing the attribute may be, for example, a symbol / character indicating that the program can be displayed in a correct luminance expression, or “True” indicating a program that can be displayed in a correct luminance expression. Contrast ”may be a mark 162a6. The above-described case where the type of gamma correction applied to the video content of each broadcast program is a type that can be supported by the display characteristics of the monitor unit 162 of the broadcast receiving apparatus 100 means, for example, “EOTF_identification” related to the video content. ”Parameter is“ 0 ”, and the display characteristic of the monitor unit 162 of the broadcast receiving apparatus 100 is BT. 709, and so on.

  By displaying symbols and the like representing attributes as described above on the detailed information 162a1 of the EPG screen 162a, the user can determine whether each broadcast program displayed on the EPG screen 162a is compatible with HDR or not, by using the correct luminance expression. It is possible to easily grasp whether or not the program can be displayed by using.

[Color gamut conversion processing of broadcast receiving device]
In this embodiment, it is assumed that the video content, which is a recorded program, has been subjected to video / audio editing processing by the editing device 390e as shown in FIG. That is, the video content provider edits the video content while checking it on the monitor device of the editing device 390e. Therefore, the video content is suitable under the color reproduction performance of the monitor device of the editing device 390e. There is a high possibility that a proper display will be performed. On the other hand, the monitor unit 162 of the broadcast receiving device 100, which is a monitor device used by a user to view the video content, generally has different color reproduction performance depending on the manufacturer and model. In this case, if the color reproduction performance of the monitor device of the editing device 390e is significantly different from the color reproduction performance of the monitor unit 162 of the broadcast receiving device 100, the video content is displayed on the monitor unit 162 of the broadcast receiving device 100. In doing so, there is a possibility that a problem may occur that the video content provider cannot correctly perform the intended video expression.

  That is, in the broadcasting system of the present embodiment, as described above, the content information descriptor is transmitted as the MMT-SI descriptor. The content information descriptor includes, as parameters indicating information relating to the color reproduction performance of the source device, the primary device of each of the R / G / B colors and the white reference point in the CIE chromaticity diagram of the color gamut that the source device can support. The coordinate values are shown.

  Further, the broadcast receiving apparatus 100 according to the present embodiment stores, in the various information storage areas of the storage unit 110, the R / G / R / G / It is assumed that the coordinate values of each primary color of B and the white reference point on the CIE chromaticity diagram are stored. In this situation, the coordinates of the R / G / B primary colors and the white reference point of the color gamut supported by the source device described in the content information descriptor are R0 / G0 / B0 and W0, and the coordinates of the R / G / B primary color and white reference point of the color gamut that can be supported by the monitor unit 162 stored in the various information storage areas of the storage unit 110 are R1 / In the case of G1 / B1 and W1, in particular, of the region composed of R0 / G0 / B0 that is a color gamut that the source device can support, R1 / G1 / that is a color gamut that the monitor unit 162 can support. A portion that does not overlap with the region configured by B1 is a region that may not be correctly displayed on the monitor unit 162.

  In order to solve the above-described problem, the broadcast receiving apparatus 100 of the present embodiment stores the color gamut supported by the source device described in the content information descriptor and various information storage areas of the storage unit 110. In the case where there is a deviation from a color gamut that can be supported by the monitor unit 162, a color gamut conversion processing function of converting video data of the video content into video data suitable for display on the monitor unit 162 is provided. . Hereinafter, the color gamut conversion function of the broadcast receiving device 100 will be described.

  The color gamut conversion processing function of the broadcast receiving apparatus 100 according to the present embodiment includes a color gamut of the video data (R0 / G0 / B0 which is a color gamut which can be supported by the source device shown in FIG. 31A). This is a function of converting a region (equivalent to a region configured) into a color gamut (region configured by R1 / G1 / B1 shown in FIG. 31A) based on the color reproduction performance of the monitor unit 162.

  The color gamut conversion processing function of the broadcast receiving apparatus 100 according to the present embodiment converts the color gamut of the video data into a color gamut R / G / By referring to the coordinate value of each primary color of B and the coordinate value of each primary color of R / G / B of the color gamut which can be supported by the monitor unit 162 stored in the various information storage areas of the storage unit 110, The conversion may be such that correct color reproduction on the monitor unit 162 is possible.

  Note that on the line segment R0 / G0 (or in the vicinity thereof), the R / G primary color coordinate values of the color gamut that the source device can support and the R / G primary colors of the color gamut that the monitor unit 162 can support. The color gamut conversion processing may be performed by referring only to the coordinate values of. On (or near) the line segment G0 / B0, the coordinate values of the G / B primary colors of the color gamut that the source device can support and the G / B primary colors of the color gamut that the monitor unit 162 can support. The color gamut conversion processing may be performed by referring to only the coordinate values. On the line segment R0 / B0 (or in the vicinity thereof), the coordinate values of the R / B primary colors of the color gamut that the source device can support and the R / B primary colors of the color gamut that the monitor unit 162 can support. The color gamut conversion processing may be performed by referring to only the coordinate values.

  Alternatively, as shown in FIG. 31B, the color gamut of the video data may be divided into three regions, and the color gamut conversion processing may be different for each divided region. For example, in the region of R0 / G0 / W0 in the color gamut of the video data, the coordinate values of the R / G primary colors and white reference points of the color gamut that the source device can support and the monitor The unit 162 performs a color gamut conversion process by referring to the R / G primary colors of the color gamut that can be handled and the coordinate values of the white reference point. In the area of G0 / B0 / W0 in the color gamut of the video data, the coordinate values of the G / B primary colors and white reference points of the color gamut that the source device can support and the monitor unit 162 The color gamut conversion process is performed by referring to the G / B primary colors and the coordinate values of the white reference point in the color gamut that can be handled. In the region of R0 / B0 / W0 in the color gamut of the video data, the coordinate values of the R / B primary colors and white reference points of the color gamut that the source device can support and the monitor unit 162 The color gamut conversion process is performed by referring to the R / B primary colors of the color gamut that can be handled and the coordinate values of the white reference point.

  Further, when the color gamut conversion processing is made different for each of the divided areas, further, on the line segment R0 / W0 (or in the vicinity thereof), the R primary color and the white reference point of the color gamut that the source device can support. The color gamut conversion processing may be performed by referring only to the coordinate values and the coordinate values of the R primary color and the white reference point in the color gamut that the monitor unit 162 can support. On the line segment G0 / W0 (or in the vicinity thereof), the coordinate values of the G primary color and the white reference point of the color gamut that can be supported by the source device and the G primary color and the G color of the color gamut that the monitor unit 162 can support The color gamut conversion processing may be performed by referring to only the coordinate value of the white reference point. On the line segment B0 / W0 (or in the vicinity thereof), the coordinate values of the B primary color and the white reference point of the color gamut that the source device can support and the B primary color and the color of the color gamut that the monitor unit 162 can support The color gamut conversion processing may be performed by referring to only the coordinate value of the white reference point.

  An example of the color gamut conversion processing will be described with reference to FIG. 31C. In the figure, R0, G0, and B0 are the coordinates of the respective primary colors of R / G / B of the color gamut that can be supported by the source device described in the content information descriptor, and (R0x, R0y), It is assumed that the coordinates have coordinates (G0x, G0y) and (B0x, B0y). R1, G1, and B1 are the coordinates of the primary colors of R / G / B of the color gamut that can be supported by the monitor unit 162 stored in the various information storage areas of the storage unit 110, respectively (R1x, R1y). ), (G1x, G1y), and (B1x, B1y). P0 is predetermined color gamut data of the video content, and has a coordinate value of (P0x, P0y). In this case, the color gamut data of P0 is converted into the color gamut data indicated by P1 by the color gamut conversion process. Note that P1 has a coordinate value of (P1x, P1y), and is calculated by an arithmetic expression of the color gamut conversion process shown below as an example.

<Example of arithmetic expression of color gamut conversion processing>
P1 = αR1 + βG1 + γB1
However,
α = {(G0y-B0y) (P0x-B0x) + (B0x-G0x) (P0y-B0y)} / {(G0y-B0y) (R0x-B0x)
+ (B0x-G0x) (R0y-B0y)}
β = {(B0y-R0y) (P0x-B0x) + (R0x-B0x) (P0y-B0y)} / {(G0y-B0y) (R0x-B0x)
+ (B0x-G0x) (R0y-B0y)}
γ = 1-α-β

  In addition, the arithmetic expression is used to perform a color gamut conversion process of all color gamut data in a color gamut region included in the video content by an R / R of a color gamut supported by the source device described in the content information descriptor. By referring to the coordinate values of each primary color of G / B and the coordinate values of each primary color of R / G / B of the color gamut which can be supported by the monitor unit 162 stored in the various information storage areas of the storage unit 110 This is an example in the case of performing. The same operation can be performed even when the color gamut of the video data is divided into three regions and the color gamut conversion processing is different for each divided region. (However, the parameters to be referred to are different.) Further, since the arithmetic expression is a known arithmetic expression using a barycentric coordinate system, a detailed description of derivation of the arithmetic expression will be omitted. Further, the arithmetic expression is merely an example, and the coordinate value of P1 may be calculated using a different arithmetic expression.

  In addition, when all of the color gamut regions included in the video content are included in the color gamut region that can be supported by the monitor device (such as the broadcast receiving device 100), the color gamut conversion process may not be performed. . For example, the color gamut of the video content is BT. The color gamut that is equivalent to the color gamut of the BT.709 system and that can be supported by the monitor device (such as the broadcast receiving device 100) is the same as the BT. If the color gamut is equivalent to the color gamut of the BT. All of the gamut of the BT.709 color gamut are BT. Since the color gamut is included in the gamut of the 2020 system, it is not necessary to perform the color gamut conversion processing. That is, the monitor device (such as the broadcast receiving device 100) can display all the color gamut data included in the video content.

  As described above, according to the color gamut conversion processing function of the broadcast receiving device 100 of the present embodiment, the color reproduction performance of the source device and the color reproduction performance of the monitor unit 162 of the broadcast receiving device 100 are different. Even when the video content is displayed, the video content can be suitably displayed when the video content is displayed on the monitor unit 162 of the broadcast receiving device 100.

[Brightness adjustment processing of broadcast receiving device]
It is assumed that the broadcast receiving apparatus 100 of this embodiment has image quality adjustment items as shown in FIG. Each of the image quality adjustment items can be adjusted according to the user's preference by the user's operation. On the other hand, among the image quality adjustment items, an item relating to luminance adjustment may be capable of automatic luminance adjustment with reference to the description of the content information descriptor. Hereinafter, the automatic brightness adjustment processing will be described.

  In the broadcast receiving apparatus 100 of the present embodiment, the content information descriptor performs (1) automatic brightness adjustment with reference to the "source_luminance_max" parameter and the "source_luminance_min" parameter. (2) the "max_light_level_of_content" parameter and the "source_luminance" It is assumed that it is possible to perform automatic brightness adjustment with reference to parameters, and (3) perform automatic adjustment with reference to only the “max_light_level_of_content” parameter.

  The broadcast receiving apparatus 100 according to the present embodiment stores the maximum value and the minimum value of the luminance that can be displayed on the monitor unit 162 as parameters indicating information on the luminance display performance of the monitor unit 162 in various information storage areas of the storage unit 110. It is assumed that

  The automatic brightness adjustment of the method (1) is performed by displaying the “source_luminance_max” parameter and the “source_luminance_min” parameter described in the content information descriptor, and the monitor unit 162 stored in various information storage areas of the storage unit 110. This is performed by referring to the maximum value / minimum value of possible luminance.

  That is, as shown in FIG. 33A, the luminance level indicated by the “source_luminance_max” parameter substantially matches the luminance level of the maximum luminance that can be displayed on the monitor unit 162, and the “source_luminance_min” parameter The conversion process of the luminance expression range of the video content is performed so that the indicated luminance level substantially matches the minimum luminance level that can be displayed on the monitor unit 162. By performing the conversion process of the luminance expression range, the user can display the video content whose luminance expression is the same as the monitor device of the editing device 390e used by the content provider for editing and editing the content, in the monitor unit of the broadcast receiving device 100. 162 can be viewed.

  The automatic brightness adjustment of the method (2) is performed by displaying the “max_light_level_of_content” parameter and the “source_luminance_min” parameter described in the content information descriptor, and the monitor unit 162 stored in various information storage areas of the storage unit 110. This is performed by referring to the maximum value / minimum value of possible luminance.

  That is, as shown in FIG. 33B, the luminance level indicated by the “max_light_level_of_content” parameter substantially matches the luminance level of the maximum value of luminance that can be displayed on the monitor unit 162, and the “source_luminance_min” parameter The conversion process of the luminance expression range of the video content is performed so that the indicated luminance level substantially matches the minimum luminance level that can be displayed on the monitor unit 162. By performing the conversion process of the brightness expression range, the user can view the video content while making full use of the contrast performance of the monitor unit 162 of the broadcast receiving device 100.

  When the content information descriptor further includes a parameter indicating the minimum luminance in each scene (chapter) (for example, “min_light_level_of_content (content minimum luminance)” or the like), the parameter is replaced with the “source_luminance_min” parameter. By referring to the “min_light_level_of_content” parameter, the contrast performance of the monitor unit 162 of the broadcast receiving apparatus 100 can be more effectively utilized.

  When the “num_of_scene” parameter is not “1”, the conversion process of the luminance expression range in the method (2) may be performed by changing a parameter referred to for each scene (chapter). In this case, it is possible to secure suitable contrast performance in the monitor unit 162 of the broadcast receiving device 100 for each scene (chapter).

The automatic brightness adjustment of the method (3) includes the “max_light_level_of_content” parameter described in the content information descriptor and the maximum value of the brightness that can be displayed on the monitor unit 162 stored in the various information storage areas of the storage unit 110. Is performed with reference to. The minimum luminance side is based on “0 (cd / m ² )”. In this case, the same effect as the automatic brightness adjustment of the method (2) can be obtained, and the conversion process of the brightness expression range can be performed by a simple calculation by referring to a small number of parameters.
In addition, the conversion process of the luminance expression range can be displayed on the monitor unit 162 in which the “source_luminance_max” parameter and the “max_light_level_of_content” parameter described in the content information descriptor are stored in various information storage areas of the storage unit 110. It may be performed only when the luminance is larger than the maximum value of the luminance.

  That is, when the “source_luminance_max” parameter or the “max_light_level_of_content” parameter described in the content information descriptor is larger than the maximum luminance that can be displayed on the monitor unit 162 stored in the various information storage areas of the storage unit 110. This is because when the received video content is displayed on the monitor of the broadcast receiving apparatus 100 as it is, there is a possibility that the brightness may be lost. In the opposite case, the brightness may not be lost.

  As described above, according to the process of the automatic brightness adjustment of the broadcast receiving apparatus 100 of the present embodiment, by referring to the content information descriptor, the user is able to perform a suitable operation on the monitor unit 162 of the broadcast receiving apparatus 100. It is possible to view the video content in the luminance expression.

According to the present embodiment, by referring to the content information attached to the program content included in the broadcast wave, it is possible to perform the above-described processes corresponding to the HDR and the expansion of the color gamut. An apparatus can be provided.
(Example 4)

  Hereinafter, a fourth embodiment of the present invention will be described. The configuration, effects, and the like in this embodiment are the same as those in the third embodiment unless otherwise specified. Therefore, in the following, differences between the present embodiment and the third embodiment will be mainly described, and description of common points will be omitted as much as possible to avoid duplication.

[System configuration]
FIG. 34 is a system configuration diagram illustrating an example of a broadcast communication system including the broadcast receiving device according to the present embodiment. The broadcast communication system of this embodiment includes a broadcast receiving device 40100 and an antenna 40100a, a connection cable 40200, a monitor device 40300, a broadband network and a router device 200r such as the Internet 200, a broadcast tower 300t, and a broadcast satellite (or a communication satellite). 300s, a broadcasting station server 300, a service provider server 400, and other application servers 500. Although illustration is omitted, the access point 200a, the mobile telephone communication server 600, and the base station 600b of the mobile telephone communication network are connected by the same connection as the system configuration diagram of the broadcast communication system of the first embodiment (see FIG. , And a portable information terminal 700. In that case, the portable information terminal 700 may be able to directly communicate with the broadcast receiving device 40100 without going through the router device 200r or the like.

  Further, as shown in FIG. 28, the encoded data of the program content included in the broadcast wave transmitted from the radio tower 300t may be output from the photographing device 390c, or may be variously edited by the editing device 390e. The video / audio may be edited.

  The broadcast receiving device 40100 receives the broadcast wave transmitted from the radio tower 300t via the broadcast satellite (or communication satellite) 300s and the antenna 40100a. Alternatively, the broadcast wave transmitted from the radio tower 300t may be directly received from the antenna 40100a without passing through the broadcast satellite (or communication satellite) 300s. The broadcast receiving device 40100 can be connected to the Internet 200 via the router device 200r, and can transmit and receive data by communication with each server device and other communication devices on the Internet 200.

  The connection cable 40200 is a communication cable that connects the broadcast receiving device 40100 and the monitor device 40300, and transmits coded video / audio data and the like output from the broadcast receiving device 40100. The monitor device 40300 transmits video information and audio information obtained by subjecting the encoded video / audio data and the like received via the connection cable 40200 to predetermined signal processing via a display device such as a liquid crystal panel and a speaker. And a video display device provided to the user.

  The monitor device 40300 may be connectable to the Internet 200 via the router device 200r, and may be capable of transmitting and receiving data by communication with each server device and other communication devices on the Internet 200. The monitor device 40300 may be capable of receiving a broadcast wave transmitted from the radio tower 300t via an antenna 40300a (not shown).

[Hardware configuration of broadcast receiving device]
FIG. 35A is a block diagram illustrating an example of an internal configuration of broadcast receiving apparatus 40100. The broadcast receiving apparatus 40100 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 extension interface unit 124, a digital interface unit 40125, a tuner / demodulation unit 131, and a separation unit 132. , Video decoder 141, video gamut converter 142, audio decoder 143, character super decoder 144, subtitle decoder 145, subtitle synthesizer 146, subtitle gamut converter 147, data decoder 151, cache unit 152, application control unit 153, It comprises a browser section 154, an application color gamut conversion section 155, a sound source section 156, a video synthesis section 161, a video output section 163, a voice synthesis section 164, a voice output section 166, an operation input section 170, and a transcode processing section 40181. .

  The broadcast receiving device 40100 of the present embodiment is assumed to be an optical disk drive recorder such as a DVD recorder or a BD recorder, a magnetic disk drive recorder such as an HDD recorder, STB, or the like. That is, the monitor unit 162 and the speaker unit 165 may be omitted as compared with the broadcast receiving device 100 of the first embodiment.

  The digital interface unit 40125 is an interface that outputs or inputs encoded digital video data and / or digital audio data. The digital interface unit 40125 can directly output the MMT data sequence demodulated by the tuner / demodulation unit 131, the MMT data sequence acquired via the LAN communication unit 121, or the mixed data of the MMT data sequences. Shall be. Further, control may be performed such that the MMT data sequence input from the digital interface unit 40125 is input to the separation unit 132.

  The output of the digital content stored in the storage (storage) unit 110 or the storage of the digital content in the storage (storage) unit 110 may be performed via the digital interface unit 40125. The digital interface unit 40125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and is a format conforming to the DVI specification, the HDMI specification, the Display Port specification, and the like. And the video data and the audio data output from the audio synthesis unit 164 may be controlled.

  The transcode processing unit 40181 is a signal processing unit that performs a transcode calculation process for converting the encoding format, bit rate, media transport system, and the like of each component constituting the content. For example, the transcode processing unit 40181 converts the MMT data sequence of the content of the broadcast program including the video component of the MPEG-H HEVC format output from the separation unit 132 into the MPEG-2 or MPEG-4 Advanced Video Coding (AVC) format. It is assumed that the content can be converted into an MPEG2-TS data string (or an MPEG2-PS data string) of program content including a video component.

  Also, it is assumed that a process of changing only the bit rate without changing the encoding format of the component or the media transport system can be performed. The program content that has been subjected to the transcode calculation processing can be stored in the storage (storage) unit 110 as recorded content, or output from the digital interface unit 40125 or the like and supplied to an external monitor device or the like. It is assumed that

[Software configuration of broadcast receiving device]
FIG. 35B is a software configuration diagram of the broadcast receiving device 40100 of the present embodiment, and illustrates a software configuration of the ROM 103, the RAM 104, and the storage (storage) unit 110. Compared with the software configuration diagram of the broadcast receiving apparatus 100 of the first embodiment (see FIG. 7D), a transcoding processing program 41003 and a recording / reproducing processing program 41004 are added to the storage (storage) unit 110.

  The transcode processing program 41003 and the recording / reproducing processing program 41004 stored in the storage (accumulation) unit 110 are respectively developed in the RAM 104, and the main control unit 101 executes the developed transcoding processing program and the recording / reproducing processing program. By doing so, a transcode processing execution unit 41103 and a recording / reproduction processing execution unit 41104 are configured. The transcode processing execution unit 41103 mainly controls the transcode operation processing in the transcode processing unit 40181. The recording / reproducing process execution unit 41104 mainly controls the process of recording the content of the broadcast program in the content storage area 1200 and the process of reproducing the recorded content from the content storage area 1200.

  It is assumed that the reception function execution unit 1102 developed in the RAM 104 further includes an output control unit 41102i. The output control unit 41102i of the reception function execution unit 1102 controls each process related to data output from the video output unit 163, the audio output unit 166, and the digital interface unit 40125.

  Note that the software configuration illustrated in FIG. 35B is merely an example, and in the present exemplary embodiment, it is not necessary to include all of the illustrated programs and execution units.

[Interface configuration between broadcast receiving device and monitor device]
FIG. 36 is a system configuration diagram illustrating an example of an interface configuration between the broadcast receiving device 40100 and the monitor device 40300. In the present embodiment, the connection terminal of the digital interface unit 40125 of the broadcast receiving device 40100 which is not shown is connected to the connection terminal of the digital interface unit which is not shown of the monitor device 40300 by a connection cable 40200. explain. Note that the monitor device 40300 may have the same configuration as the broadcast receiving device 100 shown in FIG. 7A. In this case, the digital interface unit 125 corresponds to the above-described digital interface unit on the monitor device 40300 side, and the connection cable 40200 is connected to its connection terminal.

  As illustrated in FIG. 36, the connection cable 40200 includes n pairs of differential transmission lanes CH1 to CHn, a DDC (Display Data Channel) line standardized by VESA (Video Electronics Standards Association), and an HPD (Hot Plug Data). ) Line, CEC (Consumer Electronics Control) line, and the like. Note that the differential transmission lane may be referred to as a differential transmission line.

  The n pairs of differential transmission lanes may be one pair of clock lanes and (n-1) pairs of data lanes. For example, n = 4 and one pair of clock lanes and three pairs of data lanes, or n = 2 and one pair of clock lanes and one pair of data lanes. Further, all of the n pairs of differential transmission lanes may be data lanes for transmitting data on which a clock is superimposed. For example, n = 4 and four pairs of data lanes may be used. The clock lane and the data lane may be referred to as a clock line and a data line, respectively.

  In the data lane, the digital video (R / G / B / Vsync / Hsync, Y sync) is transmitted from the video synthesizing unit 161 and the audio synthesizing unit 164 via the transmission processing unit 40125b of the digital interface unit 40125 of the broadcast receiving device 40100. / Pb (Cb) / Pr (Cr), etc.) / Audio signals and other control signals may be output in a predetermined format. The predetermined format may conform to specifications such as HDMI (registered trademark), and a detailed description thereof will be omitted. The digital video / audio signal and other control signals are received by the reception processing unit 40325b of the digital interface unit on the monitor device 40300 side, and the video processing unit and the audio processing unit (not shown) perform image quality adjustment and volume adjustment. Necessary processing is appropriately performed, and output from the display unit and the speaker of the monitor device 40300.

  Although not shown, the connection cable 40200 may further include a power supply line, a GND line, and a spare line. The n pairs of differential transmission lanes, communication lines, and the like may be shielded by a GND line. All or a part of the backup line, the DDC line, the HPD line, and the CEC line may be shared as a part of a communication line for performing network communication. For example, the backup line and the HPD line may constitute one transmission line and one reception line of the communication line, or one pair of transmission / reception lines. The CEC line and the like may be omitted. The DDC line may be used as an I2C (I-squared-C) communication line between the main control unit 101 of the broadcast receiving device 40100 and a main control unit (not shown) of the monitor device 40300.

  The transmission processing unit 40125b of the digital interface unit 40125 on the broadcast receiving device 40100 communicates with the reception processing unit 40325b of the digital interface unit on the monitor device 40300 side via the DDC line, and further sends the EDID (Extended) from the EDID storage unit 40325c. Display Identification Data) is assumed to be readable. That is, the broadcast receiving device 40100 can grasp the display performance of the monitor device 40300 by acquiring the EDID.

  In the present embodiment, the display performance refers to the input resolution and frame rate that can be supported by the monitor device 40300, whether or not the video device can support 3D video display, or whether the monitor device 40300 is capable of expanding HDR or color gamut. Is an item such as whether or not a process corresponding to is possible.

  Also, in the present embodiment, the following description will be given by taking the processing of acquiring the EDID as an example for the broadcast receiving apparatus 40100 to grasp the display performance of the monitor apparatus 40300. However, the information to be obtained is not limited to EDID. For example, performance identification information that is different from the EDID and that identifies the display performance or function of the monitor device 40300 may be obtained. Further, the display performance of the monitor device 40300 may be grasped by means other than acquiring the performance identification information.

  The transmission control unit 40125a of the digital interface unit 40125 on the broadcast receiving device 40100 controls the transmission processing unit 40125b, and also checks that the monitor device 40300 is connected via the HPD line, It is assumed that it is possible to detect that is turned on. Also, the transmission control unit 40125a of the digital interface unit 40125 on the broadcast receiving device 40100 side can perform processing for turning on the power of the monitor device 40300 via the CEC line or the like. The reception control unit 40325a of the digital interface unit on the monitor device 40300 also controls the reception processing unit 40325b.

  Note that the configuration of the connection cable 40200, the internal configuration of the digital interface unit 40125 of the broadcast receiving device 40100, and the internal configuration of the digital interface unit of the monitor device 40300 shown in FIG. 36 are merely examples, and may have different configurations. .

[Parameters of mastering information]
Also in the present embodiment, similarly to the third embodiment, the content information descriptor shown in FIG. 29A is transmitted as control information regarding the program content together with the above-mentioned MMT-SI messages / tables / descriptors. Shall be. On the other hand, the broadcast receiving apparatus 40100 of the present embodiment does not include a monitor unit or a speaker for ultimately providing a video signal or an audio signal to the user, and transmits the encoded video to the monitor apparatus 40300 via the connection cable 40200. / Transmits audio data and the like, and causes the monitor device 40300 to provide a video signal and an audio signal to the user. That is, the processing such as the color gamut conversion processing and the luminance adjustment processing described in the third embodiment is performed on the monitor device 40300 side according to the display performance of the display unit of the monitor device 40300.

  The broadcast receiving apparatus 40100 according to the present embodiment receives the content information descriptor from a broadcast wave and enables each parameter described in the received content information descriptor to enable each of the processes on the monitor apparatus 40300 side. Is appropriately selected and transmitted to the monitor device 40300 via the connection cable 40200 as mastering information in a predetermined format. For example, when the connection cable 40200 is an HDMI (registered trademark) cable and the video data, audio data, and other control signals output from the digital interface unit 40125 are in a format conforming to the HDMI (registered trademark) specification. The mastering information may be output as a part of the other control signal or the like.

  FIG. 37 shows a list of parameters transmitted from the broadcast receiving device 40100 of the present embodiment to the monitor device 40300 as mastering information.

  “Source_primaries_R [x, y]”, “source_primaries_G [x, y]”, and “source_primaries_B [x, y]” are parameters indicating information related to the color reproduction performance of the source device, and are compatible with the source device. The color gamut is represented by coordinate values on the CIE chromaticity diagram of each primary color of R (red) / G (green) / B (blue). “Source_primaries_rx”, “source_primaries_ry”, “source_primaries_gx”, “source_primaries_gy” described in the content information descriptor, “source_primes_source_x, and _source_primes_source_primes_rx, and _source_primary_rsx, ], "Source_primaries_G [x, y]", and "source_primaries_B [x, y]".

  “White_point_x, y” is a parameter indicating information relating to the color reproduction performance and the like of the source device, and indicates a coordinate value on a CIE chromaticity diagram of a white reference point that can be supported by the source device. The “source_white_point_x” and “source_white_point_y” parameters described in the content information descriptor may be selected and output as the “white_point_x, y” parameter of the mastering information.

“Max_source_mastering_luminance” is a parameter indicating information on the maximum luminance that the source device can support. The value is indicated by a value in a range from “1 (cd / m ² : candela / square meter)” to “65535 (cd / m ² )”. The "source_luminance_max" parameter described in the content information descriptor may be selected and output as the "max_source_mastering_luminance" parameter of the mastering information.

“Min_source_mastering_luminance” is a parameter indicating information on the minimum luminance that the source device can support. It is indicated by a value in a range from “0.0001 (cd / m ² )” to “6.5535 (cd / m ² )”. The “source_luminance_min” parameter described in the content information descriptor may be selected and output as the “min_source_mastering_luminance” parameter of the mastering information.

“Maximum_Content_Light_Level” is a parameter indicating the maximum luminance in the content. It is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”. The “max_light_level_of_content” parameter described in the content information descriptor may be selected and output as the “Maximum_Content_Light_Level” parameter of the mastering information.

“Maximum_Frame-average_Light_Level” is a parameter indicating the maximum value of the average frame luminance in the content. It is indicated by a value in the range of “1 (cd / m ² )” to “65535 (cd / m ² )”. The “max_frame_ave_light_level” parameter described in the content information descriptor may be selected and output as the “Maximum_Frame-average_Light_Level” parameter of the mastering information.

  “Light Level Status” is a 2-bit flag signal, and indicates the status of the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter.

  When the value of this flag is “00b”, the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter indicate the maximum value of the maximum luminance and the frame average luminance throughout the entire content. When the value of this flag is “01b”, the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter indicate the maximum value of the maximum luminance and the frame average luminance for each scene (chapter).

  When the value of this flag is “10b”, it indicates that the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter are omitted. Instead of setting the value of this flag to “10b”, the value of the “Maximum_Content_Light_Level” parameter and the value of the “Maximum_Frame-average_Light_Level” parameter may be set to “0”.

  By transmitting each parameter described above as mastering information from the broadcast receiving apparatus 40100 of the present embodiment to the monitor apparatus 40300 via the connection cable 40200, the monitor apparatus 40300 transmits the code transmitted from the broadcast receiving apparatus 40100. Processing such as color gamut conversion processing and luminance adjustment processing according to the display performance of the display unit of the monitor device 40300 can be performed on the coded video / audio data and the like. Note that each parameter of the above-described mastering information may further include another parameter different from each parameter illustrated in FIG. 37, or may not include all of the parameters. Further, the parameters may have different names.

[Mastering information generation processing of broadcast receiving apparatus]
In this embodiment, if the “content_type” parameter of the content information descriptor is “2” or “3”, the video content is content data (eg, a live broadcast program) output from the photographing device 390c. The content information descriptor does not have a “max_light_level_of_content” parameter and a “max_frame_ave_light_level” parameter. That is, in a live broadcast program or the like, the maximum value of the maximum luminance and the maximum value of the average luminance throughout the entire content are not determined until the end of the program content.

  In this case, the broadcast receiving apparatus 40100 of the present embodiment outputs mastering information by setting the values of the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter to “0”, respectively. Alternatively, using the “max_light_level_of_frame” parameter and the “frame_average_light_level” parameter of the content information descriptor, the “Maximum_Content_Light_Level” parameter and the “Maximum_Level_Average_average_average_average_average_average_average_average_average_average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average-average.html”

  On the other hand, when the video content is recorded in the content storage area 1200 of the storage (accumulation) unit 110, the broadcast receiving device 40100 may create the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter. That is, by performing the recording process of the video content, the broadcast receiving device 40100 can scan the video content from the start to the end, and therefore, the maximum brightness and the maximum value of the average brightness throughout the content. Is determined.

  When the video content recorded in the content storage area 1200 of the storage (accumulation) unit 110 by the recording process is output from the digital interface unit 40125 to the monitor device 40300 via the connection cable 40200 by the reproduction process, the broadcast receiving device 40100 Is created by scanning the video content from the beginning to the end, and controls the maximum luminance and the maximum value of the average luminance throughout the entire content to be output as the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter. You may go. That is, in the case of the video content once subjected to the recording process, all the parameters of the mastering information can be output to the monitor device 40300 regardless of the value of the “content_type” parameter of the content information descriptor. .

[Mastering information output control of broadcast receiving device]
Each parameter of the above-described mastering information may be always output to the monitor device 40300 connected via the connection cable 40200. Alternatively, the transmission processing unit 40125b of the digital interface unit 40125 of the broadcast receiving device 40100 refers to the EDID acquired from the EDID storage unit 40325c of the monitor device 40300, and the monitor device 40300 can perform processing corresponding to HDR and color gamut expansion. Each parameter of the mastering information may be output to the monitor device 40300 via the connection cable 40200 only when it is determined that Alternatively, only when the content information descriptor indicates that the video content of the broadcast program is a program corresponding to HDR, the parameters of the mastering information are transmitted to the monitor device via the connection cable 40200. Alternatively, the information may be output to 40300.

Note that the case where the content information descriptor indicates that the video content of the broadcast program is a program compatible with HDR is that the “content_type” parameter of the content information descriptor is “1”. Or, in the case of "3", if the "HDR_flag" parameter of the content information descriptor indicates HDR support of the video content of the broadcast program, the "source_luminance_max" parameter, the "max_light_level_of_content" parameter, or the " This is the case where all or any of the “max_light_level_of_frame” parameters and the like exceed a predetermined value (for example, “100 (cd / m ² )” or the like).

  The output of each parameter of the mastering information may be controlled according to the interface type of the digital interface unit 40125. For example, when the interface type of the digital interface unit 40125 is the HDMI interface, control is performed such that each parameter of the mastering information is output. When the interface type is the DVI interface, each parameter of the mastering information is not output. Control, etc.

  Alternatively, the output of each parameter of the mastering information may be controlled according to the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side and the interface type of the digital interface unit on the monitor device 40300 side. For example, when the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side and the interface type of the digital interface unit on the monitor device 40300 side are both HDMI interfaces, control is performed so as to output each parameter of the mastering information. When the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side is the HDMI interface, but the interface type of the digital interface unit on the monitor device 40300 side is not the HDMI interface (for example, a DVI interface, a Display Port interface, etc. In other words, when the connection cable 40200 is an interface conversion cable), each parameter of the mastering information is used. Performs control so as not to output over data, and the like.

  When the digital interface unit 40125 includes a first digital interface terminal and a second digital interface terminal, data output is performed from any one of the first digital interface terminal and the second digital interface terminal. The control may be performed so that the format of the output data is different depending on whether the processing is performed. In this case, it is assumed that each of the digital interface terminals has the configuration shown in FIG. 36 or another configuration.

  For example, when the first digital interface terminal is an HDMI interface and the second digital interface is not an HDMI interface, when outputting data from the first digital interface terminal, a video signal and an audio signal are output. Generate output data including the mastering information and perform data output from the first digital interface terminal, and when performing data output from the second digital interface terminal, include a video signal and an audio signal. The output data generation process and the data output process may be controlled so that output data not containing mastering information is generated and data is output from the second digital interface terminal.

  As described above, according to the broadcast receiving apparatus 40100 of this embodiment, by transmitting the mastering information together with the encoded video / audio data to the monitor apparatus 40300, the color gamut conversion processing, the luminance adjustment processing, and the like on the monitor apparatus 40300 side are performed. Can be suitably executed. That is, it is possible to provide a broadcast receiving apparatus that can execute a function with higher added value.

  As described above, the example of the embodiment of the present invention has been described using the examples 1 to 4. However, the configuration for realizing the technology of the present invention is not limited to the above-described example, and various modified examples can be considered. For example, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of one embodiment can be added to the configuration of another embodiment. These all belong to the category of the present invention. Further, numerical values, messages, and the like appearing in sentences and figures are merely examples, and using different ones does not impair the effects of the present invention.

  The functions and the like of the present invention described above may be partially or entirely realized by hardware, for example, by designing an integrated circuit. Further, the software may be realized by a microprocessor unit or the like interpreting and executing an operation program for realizing each function or the like. Hardware and software may be used together.

  Note that the software for controlling the broadcast receiving device 100 may be stored in advance in the ROM 103 and / or the storage (storage) unit 110 of the broadcast receiving device 100 at the time of product shipment. After the product is shipped, it may be obtained 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 obtained via the extension interface unit 124 or the like.

  Further, the control lines and information lines shown in the figure indicate those which are considered necessary for the description, and do not necessarily indicate all the control lines and information lines on the product. In fact, it may be considered that almost all components are interconnected.

100, 800, 40100 broadcast receiver, 100a, 40100a antenna, 101, 801 main control unit, 102, 802 system bus, 103, 803 ROM, 104, 804 RAM, 110, 810 storage unit 121, 821: LAN communication unit, 124, 824: Extension interface unit, 125, 825, 40125: Digital interface unit, 131, 831, 832: Tuner / demodulation unit, 132: Separation unit, 141: Video decoder, 142: Video Color gamut converter, 143: audio decoder, 144: character super decoder, 145: subtitle decoder, 146: subtitle synthesizer, 147: subtitle gamut converter, 151: data decoder, 152: cache unit, 153: application control unit 154: Browser section, 155: Application Gamut conversion unit, 156 sound source unit, 161, 861 video synthesis unit, 162, 862 monitor unit, 163, 863 video output unit, 164, 864 voice synthesis unit, 165, 865 speaker unit, 166 , 866: Audio output unit, 170, 870: Operation input unit, 40181: Transcode processing unit, 841: MMT decoding processing unit, 842: MPEG2-TS decoding processing unit, 200: Internet, 200r: Router device, 200a: Access Point, 300t: radio tower, 300s: broadcasting satellite (or communication satellite), 300: broadcasting station server, 390c: photographing device, 390e: editing device, 400: service provider server, 500: other application server, 600: moving Body phone communication server, 600b: base station, 700: portable information terminal, 0200 ... connection cable, 40300 ... monitoring device.

Claims (1)

A display control method executed in a broadcast system including a transmitting device that transmits an IP data flow via a broadcast transmission path and a broadcast receiving device that receives the IP data flow,
A transmitting step of transmitting an IP data flow in which the transmitting device stores program content and transfer characteristic information on a dynamic range of a video signal of the program content in an MMT format;
A receiving step in which the broadcast receiving device receives the IP data flow;
The broadcast receiving apparatus refers to the transfer characteristic information received in the receiving step, which is transfer characteristic information that can be obtained without reference to a video coded stream of the program content, and according to the transfer characteristic information, A display control step of performing a display control process of controlling the display of the content,
In the display control step, based on the value indicated by the transfer characteristic information, determine whether the program content is HDR content or SDR content and the type of gamma correction of the video signal of the program content,
In the control of the switching between the HDR content and the SDR content of the program content in the display of the content in the display control step, the switching between the HDR content and the SDR content in the decoding process of the program content and the subsequent stage of the decoding process The video processing corresponding to the display transmission characteristics of the HDR content and the SDR content. The video processing switches between the HDR content and the SDR content. In either case, the black display is started before the decoding of the content before switching ends, and the black display ends after the decoding of the content after switching starts. The control of the timing of switching between the HDR content and the SDR content in the decoding process of the program content and the timing of the switching of the video processing corresponding to the respective display transfer characteristics of the HDR content and the SDR content are started at the start of both. Is controlled after the start of the black display so that the completion of both is before the end of the black display. In the control, the switching between the HDR content and the SDR content in the decoding process of the program content is performed. The completion timing may be before or after the completion timing of the switching of the video processing corresponding to the display transfer characteristics of the HDR content and the SDR content,
A display control method, comprising:

Images