JP2017038288A - Broadcast receiver and output video information generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver which achieves a function of a higher added value.SOLUTION: A broadcast receiver can receive video data of a digital broadcast program transmitted by both a first medium transport system and a second medium transport system, which are at least two medium transport systems having different time systems. The broadcast receiver comprises: a first reception section for receiving the program video data transmitted by the first medium transport system; a second reception section for receiving the program video data transmitted by the second medium transport system; a video information generation section which synchronizes representation of the program video data in the two medium transport systems corresponding to the different time systems, by using correspondence of notation in the respective time systems on representation time of the program video data in the two medium transport systems corresponding to the different time systems, and generates output video information by synthesizing the data; and a display section for displaying the output video information.SELECTED DRAWING: Figure 7A

Description

  The present invention relates to a broadcast reception technique and an output video information generation technique.

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

JP 2001-186486 A

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

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

  For example, it is possible to receive video data of a digital broadcast program transmitted by each of the first media transport method and the second media transport method, which are at least two media transport methods having different time systems. A first broadcast receiving device for receiving program video data transmitted by the first media transport method; and receiving program video data transmitted by the second media transport method. To the different time systems using the correspondence relationship of the notation in each time system for the presentation time of the program video data in the two media transport systems based on the different time systems Based on the above two media transport system program video data synchronize the presentation synchronization Video information generating unit that generates output image data Te is configured to include a display unit for displaying the output image information.

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

1 is a system configuration diagram illustrating an example of a broadcast communication system including a broadcast receiving apparatus according to Embodiment 1. FIG. It is explanatory drawing of the outline | summary of the encoding signal in MMT. It is a block diagram of MPU in MMT. It is a block diagram of the MMTP packet in MMT. It is a conceptual diagram of the protocol stack of the broadcasting system using MMT. It is a hierarchical block diagram of the control information used with a broadcast system. It is a list of the tables used by TLV-SI of a broadcasting system. It is a list of descriptors used in the TLV-SI of the broadcasting system. It is a list of messages used in the MMT-SI of the broadcasting system. It is a list of the tables used by MMT-SI of a broadcasting system. It is a list (the 1) of the descriptor used by MMT-SI of a broadcasting system. It is the list (the 2) of the descriptor used by MMT-SI of a broadcasting system. It is a figure which shows the data transmission of a broadcasting system, and the relationship of each table. 1 is a block diagram of a broadcast receiving apparatus according to Embodiment 1. FIG. It is a block diagram of the logical plane structure of the presentation function of the broadcast receiver which concerns on Example 1. FIG. 1 is a system configuration diagram of clock synchronization / presentation synchronization of a broadcast receiving apparatus according to Embodiment 1. FIG. 1 is a software configuration diagram of a broadcast receiving apparatus according to Embodiment 1. FIG. 1 is a block diagram of a broadcast station server according to Embodiment 1. FIG. 1 is a block diagram of a service provider server according to Embodiment 1. FIG. 1 is a block diagram of a portable information terminal according to Embodiment 1. FIG. 1 is a software configuration diagram of a portable information terminal according to Embodiment 1. FIG. It is a figure which shows the data structure of MH-TOT of a broadcast system. It is a figure which shows the format of the JST_time parameter of a broadcast system. It is a figure which shows the calculation method of the present date from MJD of the broadcast receiver which concerns on Example 1. FIG. It is a figure which shows the structure of the NTP format of a broadcast system. It is a figure which shows the data structure of the MPU time stamp descriptor of a broadcast system. It is a figure which shows the data structure of the time information of the TMCC extension information area | region of a broadcast system. It is an operation | movement sequence diagram at the time of the channel scan of the broadcast receiver which concerns on Example 1. FIG. It is a figure which shows the data structure of TLV-NIT of a broadcast system. It is a figure which shows the data structure of the satellite distribution system descriptor of a broadcast system. It is a figure which shows the data structure of the service list descriptor of a broadcast system. It is a figure which shows the data structure of AMT of a broadcast system. FIG. 3 is an operation sequence diagram at the time of channel selection of the broadcast receiving apparatus according to the first embodiment. It is a figure which shows the data structure of MPT of a broadcast system. It is a figure which shows the data structure of LCT of a broadcast system. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure which shows the example of allocation of the layout to the layout number based on LCT. It is a figure explaining the operation | movement of the exception process of the screen layout control based on LCT. It is a figure explaining the operation | movement of the exception process of the screen layout control based on LCT. It is a figure which shows the data structure of MH-EIT of a broadcast system. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure at the time of the emergency alert broadcast display of the broadcast receiver which concerns on Example 1. FIG. 6 is a block diagram of a broadcast receiving apparatus according to Embodiment 2. FIG. It is a figure explaining inconsistency of the present time display at the time of broadcast service switching. It is a figure explaining operation | movement of selection control of the present time information reference source which concerns on Example 2. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a structure figure of program data. It is a structural diagram of asset data. It is a figure which shows the data structure of PA message. It is a figure which shows the data structure of MMT_general_location_info. It is a figure which shows the data structure of PLT. It is a figure which shows the meaning of a location type. It is a figure which shows the data structure of a MPU presentation area | region designation | designated descriptor. FIG. 10 is a diagram for explaining a presentation operation according to the third embodiment. FIG. 10 is a diagram for explaining a presentation operation according to the third embodiment. It is a figure which shows the data structure of a LCT expiration date descriptor. It is a figure explaining the data structure of a layout expiration date descriptor. It is a figure which shows the data structure of a presentation area | region expiration date descriptor. It is a figure which shows the data structure of a common presentation area | region information descriptor. It is a figure which shows the meaning of full_set_flag. It is a figure which shows the data structure of a duplication presentation area | region designation | designated descriptor. FIG. 10 is a diagram for explaining a presentation operation according to the third embodiment. FIG. 10 is a diagram for explaining a presentation operation according to the third embodiment. It is a figure which shows the data structure of a dependency descriptor. FIG. 10 is a diagram for explaining a presentation operation according to the third embodiment. It is a figure which shows the data structure of the modification of a dependency descriptor. It is a figure which shows the meaning of dependency_type. FIG. 10 is a diagram for explaining a presentation operation according to the third embodiment. FIG. 10 is a diagram for explaining a presentation operation according to the fourth embodiment. FIG. 10 is a diagram for explaining a presentation operation according to the fourth embodiment. It is a figure which shows the data structure of a content control descriptor. It is a figure which shows the meaning of content control mode. FIG. 10 is a diagram for explaining a presentation operation according to the fourth embodiment. FIG. 10 is a diagram for explaining a presentation operation according to the fourth embodiment. FIG. 10 is a diagram for explaining a presentation operation according to the fourth embodiment. FIG. 10 is a diagram for explaining a presentation operation according to the fourth embodiment. It is a figure which shows the protocol stack of an MPEG2-TS system. It is a figure which shows the data structure of a time stamp offset descriptor. It is a figure explaining the processing method of the time information which concerns on Example 5. FIG. It is a figure which shows the data structure of a MPU time stamp descriptor. It is a figure which shows the data structure of an asset presentation area | region designation | designated descriptor. It is a figure which shows the data structure of an asset time stamp descriptor.

Hereinafter, an example of an embodiment 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 a broadcast receiving apparatus according to the present embodiment. The broadcast communication system of the present embodiment includes a broadcast receiving device 100 and an antenna 100a, a broadband network such as the Internet 200, a router device 200r and an access point 200a, a radio tower 300t and a broadcast satellite (or communication satellite) 300s, a broadcast station 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 received directly from the antenna 100a without passing through the broadcast satellite (or communication satellite) 300s. The broadcast receiving apparatus 100 can be connected to the Internet 200 via the router apparatus 200r, and can transmit and receive data by communication with each server apparatus and other communication devices on the Internet 200.

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

  The radio tower 300t is a broadcasting facility of a broadcasting station, and transmits broadcast waves including encoded 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 broadcasts the antenna 100a connected to the broadcast receiving device 100 to the antenna 100a. It is a repeater that retransmits waves. The broadcasting station includes a broadcasting station server 300. The broadcast station server 300 stores metadata such as broadcast programs (video content, etc.) and program titles, program IDs, program outlines, performer information, broadcast date and time of each broadcast program, and the video content and each metadata. Based on the contract, it can be provided to the service provider. The provision of the moving image content and each metadata to the service provider may be performed through an API (Application Programming Interface) provided in the broadcast station server 300.

  The service provider server 400 is a server device prepared by a service provider, and can provide various services linked to a broadcast program distributed from a broadcasting station. The service provider server 400 also stores, manages, and distributes video content and metadata provided from the broadcast station server 300, various contents and applications linked to broadcast programs, and the like. In addition, in response to an inquiry from a television receiver or the like, it also has a function of searching for available contents and applications and providing a list. The storage, management and distribution of the content and metadata and the 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. Moreover, 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, and distributes 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, and is connected to the portable information terminal 700 via the base station 600b. The mobile telephone communication server 600 manages telephone communication (call) and data transmission / reception via the mobile telephone communication network of the portable information terminal 700, and each server device and other communication devices on the portable information terminal 700 and the Internet 200. Data can be sent and received through communication with the. Communication between the base station 600b and the portable information terminal 700 is performed using a W-CDMA (Wideband Code Multiple Access) (registered trademark) method, a GSM (Global System for Mobile communications) (registered trademark) method, or an LTE (Long Term Term) method. Alternatively, it may be performed by other communication methods.

  The portable information terminal 700 has telephone communication (call) and data transmission / reception functions via a mobile telephone communication network, and wireless communication functions such as Wi-Fi (registered trademark). The portable information terminal 700 can be connected to the Internet 200 via the router device 200r and the access point 200a, or via the mobile phone communication network base station 600b and the mobile phone communication server 600. It is possible to send 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. For the wireless communication, a method such as Wi-Fi (registered trademark) may be used. Communication between portable information terminal 700 and broadcast receiving apparatus 100 is performed via access point 200a and Internet 200 and router apparatus 200r, or through base station 600b and mobile telephone communication server 600, Internet 200 and router apparatus 200r. It may be carried out via.

[Outline of MMT method]
The broadcast receiving apparatus 100 shown in FIG. 1 is defined by an MPEG (Moving Picture Experts Group) -2 system that is widely used in conventional digital broadcasting systems as a media transport system for transmitting data such as video and audio. It is assumed that the television receiver is compatible with MMT (MPEG Media Transport) instead of TS (Transport Stream) (hereinafter referred to as MPEG2-TS). A television receiver that can handle 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 into one stream together with a control signal and a clock. Since it is handled as one stream including a clock, it is suitable for transmitting one content through one transmission path in which transmission quality is ensured, and has been adopted in many conventional digital broadcasting systems. On the other hand, the function of MPEG2-TS in response to environmental changes related to content distribution, such as recent diversification of content, diversification of devices using content, diversification of transmission paths for content distribution, diversification of content storage environment, etc. Therefore, MMT is a newly developed media transport system.

  FIG. 2A shows an example of an outline of the encoded 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 transmission of video, audio, and the like, and may be configured in units of 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 information of encoded media data, and sample data that is encoded media data. Further, it is assumed that MFU can be extracted from the sample data. In the case of media such as video components and audio components, the presentation time and decoding time may be specified in units of MPUs or access units. FIG. 2B shows an example of the configuration of the MPU.

  The MMTP packet includes a header part and an MMTP payload, and transmits MFU and MMT control information. The MMTP payload includes a payload header corresponding to the content (data unit) stored in the payload portion. FIG. 2C shows an example of the outline from the construction of the MFU from the video / audio signal, further storing it in the MMTP payload, and configuring the MMTP packet. Note that, in a video signal that is encoded using inter-frame prediction, it is desirable to configure the MPU in GOP (Group Of Pictures) units. Further, when the size of the MFU to be transmitted is small, one MFU may be stored in one payload part, or a plurality of MFUs may be stored in one payload part. When the size of the MFU to be transmitted is large, one MFU may be divided into a plurality of payload parts and stored. Further, the MMTP packet may be protected using a technique such as Application Layer Forward Error Correction (AL-FEC) or Automatic Repeat Request (ARQ) 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 the video encoding system, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless) is used as the audio encoding system. Coding) is used. Encoded data such as video and audio of a broadcast program encoded by each of the above methods is in the MFU or MPU format, is further carried on the MMTP payload, is converted into an MMTP packet, and is transmitted as an IP (Internet Protocol) packet. And Further, data contents related to a broadcast program may be in the MFU or MPU format, further MMTP packetized on the MMTP payload, and transmitted by IP packet. Data content transmission methods include subtitle / text super transmission method used for streaming data synchronized with broadcast, application transmission method used for data transmission asynchronous with broadcast, and synchronous / asynchronous message for application running on television receiver. Four types of event message transmission methods used for notification and other general-purpose data transmission methods for transmitting general-purpose data in a synchronous / asynchronous manner are prepared.

  For transmission of MMTP packets, UDP / IP (User Datagram Protocol / Internet Protocol) is used in the broadcast transmission path, and UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used in the communication line. . In the broadcast transmission path, a TLV (Type Length Value) multiplexing method is used for efficient transmission of IP packets. An example of the protocol stack of the broadcasting system of the present embodiment is shown in FIG. 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, 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. It is assumed that the format of the MMT control message is MMTP packet on the MMTP payload, and is transmitted as an IP packet. TLV-SI is control information related to multiplexing of IP packets, and provides information for channel selection and correspondence information between IP addresses and services.

  Also in a broadcasting system using MMT, time information is transmitted in order to provide absolute time. Note that MPEG2-TS indicates the component display time based on a different clock for each TS, whereas MMT indicates the component display time based on the Coordinated Universal Time (UTC). To do. With these mechanisms, it is possible for the terminal device to synchronously display components transmitted from different transmission points through 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 broadcasting system using MMT]
In the broadcast system supported by the broadcast receiving apparatus 100 according to the present embodiment, as described above, the control information includes the TLV-SI related to the TLV multiplexing method for multiplexing IP packets and the MMT that is the media transport method. Prepare the relevant MMT-SI. TLV-SI provides information for the broadcast receiving apparatus 100 to demultiplex IP packets multiplexed on the broadcast transmission path. The TLV-SI is composed of a “table” and a “descriptor”. The “table” is transmitted in the 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 broadcast service. MMT-SI is composed of three levels: “message” for storing “table” and “descriptor”, “table” having elements and attributes indicating specific information, and “descriptor” indicating more detailed information. Shall be. An example of the hierarchical structure of the control information used in the broadcasting system of the present embodiment is shown in FIG.

<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 apparatus 100 of the present embodiment. In the present embodiment, the following table is used as a “table” of TLV-SI.

(1) TLV-NIT
The network information table for TLV (Network Information Table for TLV: TLV-NIT) represents information on the physical configuration of the TLV stream transmitted by the network and the characteristics of the network itself.

(2) AMT
The 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 It is also possible to prepare a table uniquely set by the service operator.

<Descriptor used in TLV-SI>
FIG. 5B shows a list of “descriptors” arranged in the TLV-SI of the broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment corresponds. In this embodiment, the following are used as “descriptors” of TLV-SI.

(1) Service list descriptor The service list descriptor provides a list of services according to 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 identify broadcast and non-broadcast.

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

(5) Descriptors set by the provider In addition, it is possible to prepare descriptors uniquely set by the service provider.

<Messages used in MMT-SI>
FIG. 6A shows a list of “messages” used in the MMT-SI of the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In this embodiment, it is assumed that the following message is used as a “message” of MMT-SI.

(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 the section extension format of MPEG-2 Systems.

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

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

(5) Data transmission message The data transmission message is a message for storing a table relating to data transmission.

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

<Table used in MMT-SI>
FIG. 6B shows a list of “tables” used in the MMT-SI of the broadcasting system supported by the broadcast receiving apparatus 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. The message for storing the table may be determined according to the table. In this embodiment, the following table is used as the “table” of MMT-SI.

(1) MPT
The MMT package table (MPT) provides information constituting the package such as a list of assets and a position of the assets on the network. The MPT may be stored in the PA message.

(2) PLT
A package list table (Packet List Table: PLT) shows a list of IP data flows and packet IDs that transmit PA messages of MMT packages provided as broadcasting services, and IP data flows that transmit IP services. The PLT may be stored in the 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
The Entity Control Message (ECM) is common information composed of program information and control information, and delivers key information and the like for descrambling. The ECM may be stored in the M2 section message.

(5) EMM
The Entity 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. CAT (MH) may be stored in the CA message.

(7) DCM
The Download Control Message (DCM) transmits key related information including a key for decrypting a transmission path cipher for downloading. The DCM may be stored in the M2 section message.

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

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

(10) MH-AIT
The MH-application information table (MH-Application Information Table: MH-AIT) stores all information related to the 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
The MH-Broadcaster Information Table (MH-BIT) is used for presenting information about broadcasters existing on the network. The MH-BIT may be stored in the M2 section message.

(12) MH-SDTT
The MH-Software Download Trigger Table (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 that represents 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-TOT) 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-CDT) is used to transmit common data to be stored in the nonvolatile memory in a section format for all receivers that receive the MH-Common Data Table (MH-CDT). The MH-CDT may be stored in the M2 section message.

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

(17) DAM table The data asset management table (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 (Data Content Configuration 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 (Event Message Table: EMT) is used to transmit information about event messages. The EMT may be stored in the M2 section message.

(20) Table set by service provider In addition, it is possible to prepare a table uniquely set by the service service provider.

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

(1) Asset group descriptor The asset group descriptor provides asset group relationships and priorities within groups. The asset group descriptor may be located in the MPT.

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

(3) Background Color Specification Descriptor The background color specification descriptor provides the backmost background color in the layout specification. The background color designation descriptor may be arranged in the LCT.

(4) MPU presentation area designation descriptor The MPU presentation area designation descriptor provides a position for presenting an MPU. The MPU presentation area designation descriptor may be arranged 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 descriptor provides an asset ID of an asset having a dependency relationship. The dependency descriptor may be arranged 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 placed in MPT or CAT (MH).

(8) Scramble method descriptor The scramble method 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 arranged in MPT or CAT (MH).

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

(10) Emergency information descriptor (MH)
The emergency information descriptor (MH) is used when emergency alert broadcasting is performed. 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 an encoding parameter of an ISO / IEC 14496-3 (MPEG-4 audio) audio stream. Use 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 is an ITU-T recommendation H.264 standard. H.265 | Used to describe basic encoding parameters of ISO / IEC 23008-2 video stream (HEVC stream). 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 sequence information system. The MH-link descriptor may be arranged in MPT, MH-EIT, MH-SDT, etc.

(15) MH-event group descriptor The MH-event group descriptor is used to indicate that these event groups are grouped when there is a relationship between a plurality of events. 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 according to service identification and service type. The MH-service list descriptor may be arranged in the MH-BIT.

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

(18) MH-extended format event descriptor The MH-extended format event descriptor is used in addition to the MH-short format 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 explanations related to the video component, and is also used to represent an elementary stream in a character format. The video component descriptor may be arranged 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. . The MH-stream identification descriptor may be arranged 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 represents viewing restrictions based on age, and is used to extend based on other restriction conditions. The MH-parental rate descriptor may be arranged in MPT or MH-EIT.

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

(24) MH-Target Area Descriptor The MH-target area descriptor is used to describe a target area for 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 a transmission parameter of SI. The MH-SI transmission parameter descriptor may be arranged 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 formation channel name and its operator name with a character code together with the service type. 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 the CAS infrastructure. 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 arranged in the DAM table.

(32) MH-Info Descriptor The MH-Info descriptor describes information related to the MPU or item. The MH-Info descriptor may be placed in the DAM table.

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

(34) MH-Compression Type Descriptor The MH-Compression Type descriptor means 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 placed in the 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 arranged 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 related to event messages 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 to the actual time (for example, UTC + 9 hours) and the display time to the human system during 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 CDT format logo, and the like. The MH-logo transmission descriptor may be arranged 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 extended timestamp descriptor may be placed 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 arranged in MH-SDTT.

(43) MH-Network Download Content Descriptor The MH-Network Download Content Descriptor is used to describe attribute information of content downloaded using the 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 for designating a transmission protocol such as broadcasting or communication and indicating 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 in order to indicate details of an application acquisition destination. The MH-simple application location descriptor may be placed in the MH-AIT.

(47) MH-application boundary authority setting descriptor The MH-application boundary authority setting descriptor is described in order to set an application boundary and to set broadcast resource access authority for each area (URL). The MH-application boundary authority setting descriptor may be arranged in the MH-AIT.

(48) MH-Activation Priority Information Descriptor The MH-activation priority information descriptor is described for designating the application activation priority. The MH-activation priority information descriptor may be arranged in the MH-AIT.

(49) MH-cache information descriptor The MH-cache information descriptor is described for use in cache control in the case where resources constituting an application are cached and held when application reuse is assumed. . The MH-cache information descriptor may be arranged 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 application acquisition. Describe in. The MH-stochastic application delay descriptor may be placed 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 arranged in the DCC table.

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

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

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

  In the broadcast system supported by the broadcast receiving apparatus 100 according to 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 or AMT, and an IP data flow that is a data flow of an IP packet. The IP data flow includes video assets including a series of video MPUs and audio assets 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 “packages” by MPT (MMT package table) that is stored and transmitted in the PA message. Specifically, the package ID (corresponding to the “MMT_package_id_byte” parameter shown in FIG. 17 described later) and the asset ID of each asset included in the package (corresponding to the “asset_id_byte” parameter shown in FIG. 17 described later) are stored in the MPT. Is described, the association is performed.

The asset that constitutes the package may be only the asset in the TLV stream, but as shown in FIG. 6E, the asset that is transmitted by the IP data flow of the communication line may be included. This is because the location information of each asset included in the package (corresponding to “MMT_general_location_info ()” shown in FIG. 17 to be described later) is included in the MPT, and the broadcast receiving apparatus 100 of the present embodiment specifies the reference destination of each asset. This can be realized by making it possible to grasp. Specifically, by changing the value of the “MMT_general_location_infolocation_type” parameter placed in the location information,
(1) Data multiplexed in the same IP data flow as MPT (location_type = 0x00)
(2) Data multiplexed in IPv4 data flow (location_type = 0x01)
(3) Data multiplexed in the IPv6 data flow (location_type = 0x02)
(4) Data multiplexed in broadcast MPEG2-TS (location_type = 0x03)
(5) Data multiplexed in the IP data flow in MPEG2-TS format (location_type = 0x04)
(6) Data at the specified URL (location_type = 0x05)
For example, the broadcast receiving device 100 can refer to various data transmitted through various transmission paths.

  Among the above-mentioned reference destinations, (1) is an IP data flow received via a digital broadcast signal received by a tuner / demodulator 131 of the broadcast receiving apparatus 100 of FIG. When the MPT is transmitted including the IP data flow on the communication line side, the reference destination of (1) may be an 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 (described later) via a communication line. Also, (4) is a receiving function for receiving a digital broadcast signal using the MMT system and a digital broadcast using the MPEG2-TS system, as in the broadcast receiving apparatus 800 of the second embodiment shown in FIG. In the case of a broadcast receiving apparatus having both reception functions for receiving a signal, digital broadcasting using the MPEG2-TS system based on MPT location information ("MMT_general_location_info ()") included in a digital broadcasting signal using the MMT system It can be used when referring to data multiplexed in MPEG2-TS received by a reception function for receiving a signal.

  The data constituting the “package” is specified in this way, but in the broadcast 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 digital broadcasting. Treat as.

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

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

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

  The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving apparatus 100 in accordance with a predetermined operation program. A 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 apparatus 100.

  A ROM (Read Only Memory) 103 is a non-volatile 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. The ROM 103 may store operation setting values necessary for the operation of the broadcast receiving apparatus 100. A RAM (Random Access Memory) 104 serves as a work area for executing a basic operation program and other operation programs. The ROM 103 and the RAM 104 may be integrated with the main control unit 101. Further, the ROM 103 may not 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 an operation program and an operation setting value of the broadcast receiving apparatus 100, personal information of a user of the broadcast receiving apparatus 100, and the like. Further, it is possible to store an operation program downloaded via the Internet 200 and various data created by the operation program. It is also possible to store content such as moving images, still images, and audio obtained from broadcast waves or downloaded via the Internet 200. All or some of the functions of the ROM 103 may be replaced by a partial area of the storage (storage) unit 110. Further, the storage (accumulation) unit 110 needs to hold stored information even when power is not supplied to the broadcast receiving apparatus 100 from the outside. Therefore, for example, a device such as a nonvolatile semiconductor element memory such as a flash ROM or SSD (Solid State Drive), a magnetic disk drive such as an HDD (Hard Disc Drive), or the like is used.

  The operation programs stored in the ROM 103 and the storage (accumulation) 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 a 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 an MMT data string (or a part thereof) of a program transmitted via a communication line is acquired. 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. The broadcast receiving apparatus 100 may further include other communication units such as a BlueTooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

  The tuner / demodulation unit 131 receives a broadcast wave transmitted from the radio tower 300t via the antenna 100a, and tunes (tunes) to a service channel desired by the user based on the control of the main control unit 101. Further, the tuner / demodulator 131 demodulates the received broadcast signal to obtain an MMT data string. In the example shown in FIG. 7A, a configuration with one tuner / demodulation unit is illustrated. However, for the purpose of simultaneous display of a plurality of screens, back program recording, and the like, the broadcast receiving apparatus 100 includes a tuner / demodulation unit. It is good also as a structure mounted in multiple.

  The separation unit 132 is an MMT decoder, and a video data sequence, an audio data sequence, a character super data sequence, a caption data sequence, etc., which are real-time presentation elements based on a control signal in the input MMT data sequence, are respectively converted into a video decoder 141. The voice decoder 143, the character super decoder 144, the subtitle decoder 145, etc. are distributed. The data input to the demultiplexing unit 132 includes an MMT data sequence transmitted through a broadcast transmission path and demodulated by the tuner / demodulation unit 131, or MMT data transmitted through a communication line and received by the LAN communication unit 121. It can be a line. In addition, the separation unit 132 reproduces the multimedia application and file system data that is a component of the multimedia application, and temporarily stores them in the cache unit 152. In addition, the separation unit 132 extracts general-purpose data and outputs the data to the data decoder 151 for use in streaming data for use with a player that 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 string 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 color space conversion processing on the video information decoded by the video decoder 141 as needed for video synthesis processing 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. Also, the video decoder 141 and the audio decoder 143 are input with streaming data, such as MPEG-DASH (MPEG-Dynamic Adaptive Streaming HTTP) format, obtained from the Internet 200 via the LAN communication unit 121, for example. good. A plurality of video decoders 141, video color gamut conversion units 142, audio decoders 143, and the like may be provided in order to simultaneously decode a plurality of types of video data sequences and audio data sequences.

  The character super decoder 144 decodes the character super data string input from the separation unit 132 and outputs character super information. The caption decoder 145 decodes the caption data string input from the separation unit 132 and outputs caption information. The superimposing information output from the character super decoder 144 and the subtitle information output from the subtitle decoder 145 are subjected to the synthesizing process in the subtitle synthesizing unit 146, and further, the subtitle color gamut converting unit 147 performs the synthesis in the video synthesizing unit 161. For the video composition process, a color space conversion process is performed as necessary. In the present embodiment, among the services centered on character information that are presented simultaneously with the broadcast program video, those related to the content of the video are referred to as subtitles, and other services are referred to as character supermarkets. To do. If they are not distinguished, they are collectively referred to as subtitles.

  The browser unit 154 transmits the multimedia application file acquired from the server device on the Internet 200 via the cache unit 152 or the LAN communication unit 121 and the file system data that is a component of the multimedia application file to the control information or LAN included in the MMT data string. The control information acquired 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 color space conversion processing in the application color gamut conversion unit 155 as necessary for the video composition processing in the video composition unit 161. The browser unit 154 also plays the application audio information by acting on the sound source unit 156.

  The video composition unit 161 receives the video information output from the video color gamut conversion unit 142, the caption 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 composition 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. Further, the video composition unit 161 is based on the control of the main control unit 101, and an EPG (Electronic Program Guide) created based on information such as scaling processing and MH-EIT included in the MMT-SI as necessary. Performs superimposition processing of screen information. The monitor unit 162 is, for example, a display device such as a liquid crystal panel, and provides the video information selected and / or superimposed by the video composition unit 161 to the user of the broadcast receiving apparatus 100. The video output unit 163 is a video output interface that outputs the video information selected and / or superimposed by the video composition unit 161.

  It is assumed that the presentation function of the broadcast receiving apparatus 100 of the present embodiment has a logical plane structure in order to display the multimedia service as intended by the provider. FIG. 7B shows an example of the configuration of the logical plane structure provided in the presentation function of the broadcast receiving apparatus 100 of the present embodiment. In the logical plane structure, a character super plane for displaying a character super is arranged on the foreground, and a subtitle plane for displaying a subtitle is arranged on the next layer. In the third layer, a multimedia plane for displaying a broadcast video, a multimedia application, or a composite video thereof is arranged, and a background plane is arranged on the back surface. In the caption synthesizing unit 146 and the video synthesizing unit 161, drawing of the character super information on the character super plane, drawing of the subtitle information on the subtitle plane, and drawing on the multimedia plane such as video information and application information are performed. In addition, the background color is drawn on the background plane based on LCT or the like included in the MMT-SI. Note that a plurality of multimedia planes in the third layer 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 conversion unit 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 processing such as selection and / or mixing as appropriate. The speaker unit 165 provides the user of the broadcast receiving apparatus 100 with the audio information that has been selected and / or mixed by the audio synthesis unit 164. The audio output unit 166 is an audio output interface that outputs audio information that has been selected and / or mixed by the audio synthesis unit 164.

  The extension interface unit 124 is an interface group 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. To do. The analog video / audio interface performs input of analog video signals / audio signals from external video / audio output devices, output of analog video signals / audio signals to external video / audio input devices, and the like. The USB interface is connected to a PC or the like to transmit / receive data. A broadcast program or content may be recorded by connecting an HDD. A keyboard or other USB device 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 output the MMT data sequence obtained by demodulation by the tuner / demodulation unit 131, the MMT data sequence obtained via the LAN communication unit 121, or the mixed data of each MMT data sequence as it is. Shall. Further, the MMT data string input from the digital interface unit 125 may be controlled to be input to the separation unit 132. Output of digital content stored in the storage (accumulation) unit 110 or storage of digital content in the storage (accumulation) 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. It may be a thing. The data 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 performs digital interface output 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 that inputs an operation instruction to the broadcast receiving apparatus 100. In this embodiment, a remote control receiving unit that receives a command transmitted from a remote controller (not shown) and a button switch are arranged. It shall consist of operation keys. Either one may be sufficient. Further, the operation input unit 170 may be replaced with a touch panel arranged on the monitor unit 162. A keyboard connected to the extension interface unit 124 may be substituted. The remote controller (not shown) may be replaced with a portable information terminal 700 having a remote command transmission function.

  As described above, when the broadcast receiving apparatus 100 is a television receiver or the like, the video output unit 163 and the audio output unit 166 are not essential components in the present invention. In addition to the television receiver, the broadcast receiving apparatus 100 may be 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. It may be a PC (Personal Computer), a tablet terminal, a navigation device, a game machine or the like having a digital broadcast receiving function or a broadcast communication cooperation function. When the broadcast receiving apparatus 100 is a DVD recorder, HDD recorder, 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, the audio output unit 166, or the digital interface unit 125, an operation similar to that of the broadcast receiving apparatus 100 of the present embodiment is possible.

[System configuration for clock synchronization / presentation synchronization of broadcast receivers]
FIG. 7C is an example of a system configuration of clock synchronization / presentation synchronization in a broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In the broadcast system of the present embodiment, UTC is transmitted from the broadcast transmission system to a receiver (such as the broadcast receiving device 100 of the present embodiment) in the 64-bit NTP timestamp format. In the NTP timestamp format, “seconds or more” of UTC is represented by 32 bits, and “less than seconds” is represented by 32 bits. However, in practice, it is difficult to reproduce 1 second with 32-bit accuracy. For this reason, as a system clock for synchronizing the video system and a system clock for operating an NTP clock, for example, as shown in the figure, “2 to the 24th power” Hz (about 16.8 MHz). ) Frequency may be used. In consideration of the fact that the system clock in the conventional broadcasting system is 27 MHz and the hardware configuration of the receiver can be easily constructed, the number of “2 24” to “2 28” is about 2 It is desirable to employ a power frequency as the system clock.

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

  On the broadcast transmission system side, when 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 “2 to the power of n” Hz, Realizing a synchronized sending system clock. Further, the entire signal processing system is operated in synchronization with a system clock of “2 to the power of n” Hz. Further, the output of the transmission system clock is periodically transmitted to the receiver side through the broadcast transmission path as time information in the NTP length format.

  On the receiver side, time information in the NTP length format is received via the broadcast transmission path, and the reception system clock is reproduced by a PLL system based on a VCO of “2 to the power of n” Hz as in the broadcast transmission system side. Thereby, the reception system clock becomes a clock synchronized with the broadcast transmission system side. In addition, 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. Also, the decoding time and the presentation time for each presentation unit of the video / audio signal are set on the broadcast transmission system side based on the time information in the NTP format. Here, the MPT 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 time stamp descriptor of FIG. 13B indicates the sequence number of the MPU describing the time stamp, and the “mpu_presentation_time (MPU presentation time)” parameter indicates the MPU presentation time in 64-bit NTP. It is shown in time stamp format. Therefore, the receiver can refer to the MPU time stamp descriptor stored in the MPT and control the presentation (display, output, etc.) timing for each MPU such as a video signal, an audio signal, a caption, and a character supermarket. .

  Note that when focusing on the decoding timing and presentation timing control for each presentation unit such as the video / audio signal, the video / audio signal is synchronized even with a clock of about "2 to the 16th power" Hz (about 65.5 KHz). In this case, it is not necessary to refer to the lower 16 bits of the NTP timestamp format described in the MPU timestamp descriptor or the like. In other words, when a clock of “2 to the power of m” generated by dividing the system clock is used to control the decoding timing and presentation timing, the lower level of the NTP timestamp format described in the MPU timestamp descriptor etc. The “32-m” bit need not be referenced. Therefore, the lower “32-m” bits of the NTP timestamp format described in the MPU timestamp descriptor or the like may be fixed to “0” or “1”.

[Broadcast receiving device software configuration]
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, a basic operation program 1001 and other operation programs are stored in the ROM 103, and a reception function program 1002 and other operation programs are stored in the storage (accumulation) unit 110. The storage unit 110 also stores a content storage area 1200 that stores content such as moving images, still images, and audio, and authentication information that is necessary when accessing an external mobile terminal device or each server device. It is assumed that an information storage area 1300 and various information storage areas for storing various other information are provided.

  A basic operation program 1001 stored in the ROM 103 is expanded in the RAM 104, and the main control unit 101 executes the expanded basic operation program to constitute a 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. To do. The RAM 104 is provided with a temporary storage area that temporarily holds data created when each operation program is executed as necessary.

  In the following, in order to simplify the explanation, the main control unit 101 executes the basic operation processing to control each operation block by expanding the basic operation program 1001 stored in the ROM 103 into the RAM 104 and executing it. The unit 1101 is described as performing control of each operation block. The same description is made for other operation programs.

  The reception function execution unit 1102 controls each operation block of the broadcast receiving apparatus 100 in order to reproduce components such as video and audio transmitted in the broadcast system of this 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 decoding processing units. The AV decoding 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 caption processing unit 1102e mainly controls the caption 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 description contents such as MH-EIT included in the MMT-SI. The presentation processing unit 1102h is based on the logical plane structure, and the video color gamut conversion unit 142, the subtitle synthesis unit 146, the subtitle color gamut conversion unit 147, the application color gamut conversion unit 155, the video synthesis unit 161, and the audio synthesis unit 164. Is mainly controlled.

  Each operation program may be stored in the ROM 103 and / or the storage (storage) unit 110 in advance at the time of product shipment. It may be acquired from the other application server 500 on the Internet 200 via the LAN communication unit 121 after the product is shipped. Further, each operation program stored in a memory card, an optical disk or the like may be acquired via the expansion interface unit 124 or the like.

[Broadcasting station server configuration]
FIG. 8 is a block diagram illustrating 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 in accordance with a predetermined operation program. A system bus 302 is a data communication path for performing data transmission / reception between the main control unit 301 and each operation block in the broadcast station server 300. The RAM 304 serves as 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 program content and the like of each broadcast program broadcast by the broadcast station. The metadata storage area 3300 stores metadata such as the program title, program ID, program overview, performers, broadcast date and time, copy control information related to each program content, and the like of each broadcast program.

  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 expanded in the RAM 304, and the main control unit 301 further executes the expanded programs. Thus, a basic operation execution unit 3101, a broadcast content management / distribution execution unit 3102, and a broadcast content transmission execution unit 3103 are configured.

  In the following, in order to simplify the description, a process for controlling each operation block by causing the main control unit 301 to expand the basic operation program 3001 stored in the storage unit 310 to the RAM 304 and execute the basic operation program 3001 will be described. The operation execution unit 3101 is described as performing control of each operation block. The same description is made for other operation programs.

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

  The broadcast content transmission execution unit 3103 displays 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, copy control information of the program content, and the like. Time schedule management and the like are performed when an MMT data string including the MMT data string is transmitted from the radio tower 300t via the digital broadcast signal transmission unit 360.

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

[Service provider server configuration]
FIG. 9 is a block diagram illustrating 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. A 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 becomes 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 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. In addition, the video content produced by the service provider is stored. The metadata storage area 4300 stores each metadata provided from the broadcast station server 300, metadata about video content produced by the service provider, and the like. The application storage area 4400 stores various applications for realizing a service linked to a broadcast program for distribution in response to a request from each television receiver. The user information storage area 4500 stores information (such as personal information and authentication information) related to users who are permitted to access the service provider server 400.

  The basic operation program 4001, the video content management / distribution program 4002 and the application management / distribution program 4004 stored in the storage unit 410 are expanded in the RAM 404, and the main control unit 401 further expands the basic operation program and video. 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, in order to simplify the description, a process for controlling each operation block by the main control unit 401 by developing the basic operation program 4001 stored in the storage unit 410 in the RAM 404 and executing the basic operation program 4001 will be described. It is described that the operation execution unit 4101 controls each operation block. The same description is made for other operation programs.

  The video content management / distribution execution unit 4102 obtains the program content and metadata of the broadcast program from the broadcast station server 300, the video content stored in the video content storage area 4200 and the metadata storage area 4300, and each metadata. And the distribution of the video content etc. and each metadata to each television receiver. Furthermore, the video content management / distribution execution unit 4102 performs authentication processing and the like of each television receiver as necessary when delivering each video content and each metadata to each television receiver. You can go. The application management / distribution execution unit 4104 performs management of each application stored in the application storage area 4400 and control when each application is distributed in response to a request from each television receiver. Furthermore, the application management / distribution execution unit 4104 may perform authentication processing of each television receiver as necessary when distributing each application to each television receiver.

  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 the internal configuration of the 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 expansion interface unit 724, an operation unit 730, an image processing unit 740, an audio processing unit 750, and a sensor unit 760. , Composed of.

  The main control unit 701 is a microprocessor unit that controls the entire portable information terminal 700 according to a predetermined operation program. A system bus 702 is a 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 a basic operation program 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 the basic operation program and other operation programs are executed. The ROM 703 and the RAM 704 may be integrated with the main control unit 701. Further, the ROM 703 does not have an independent configuration as shown in FIG. 10A, and may use a partial storage area in the storage unit 710.

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

  Note 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 telephone 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 / receives data to / 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 close to the corresponding reader / writer. The LAN communication unit 721, the mobile telephone network communication unit 722, and the NFC communication unit 723 are each provided with a coding circuit, a decoding circuit, an antenna, and the like. The communication processing unit 720 may further include another communication unit such as a BlueTooth (registered trademark) communication unit or an infrared communication unit.

  The extension interface unit 724 is an interface group for extending the functions of the portable information terminal 700, and in this embodiment, is configured with a video / audio interface, a USB interface, a memory interface, and the like. The video / audio interface performs input of video signals / audio signals from external video / audio output devices, output of video signals / audio signals to external video / audio input devices, and the like. The USB interface is connected to a PC or the like to transmit / receive data. A keyboard or other USB device 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 this embodiment, the operation unit 730 includes a touch panel 730t arranged on the display unit 741 and an operation key 730k in which button switches are arranged. Shall. Either one may be sufficient. The portable information terminal 700 may be operated using a keyboard or the like connected to the extension interface unit 724. The portable information terminal 700 may be operated using a separate terminal device connected by wired communication or wireless communication. That is, the portable information terminal 700 may be operated from the broadcast receiving device 100. 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. In addition, the image signal processing unit 742 has a function of performing format conversion, menu and other OSD (On Screen Display) signal superimposing processing, 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 electric signal by using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor. A camera unit for inputting image data of surroundings and objects.

  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 and the like into voice data and inputs the voice data.

  The sensor unit 760 is a sensor group for detecting the state of the portable information terminal 700. In this embodiment, the GPS reception unit 761, the gyro sensor 762, the geomagnetic sensor 763, the acceleration sensor 764, the illuminance sensor 765, and the proximity sensor 766. , Is composed. With these sensor groups, it is possible to detect the position, tilt, direction, movement, ambient brightness, proximity of nearby objects, and the like of the portable information terminal 700. The portable information terminal 700 may further include other sensors 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. A PDA (Personal Digital Assistant) or a notebook PC may be used. Further, it may be a digital still camera, a video camera capable of shooting moving images, a portable game machine, a navigation device, or other portable digital devices.

  The configuration example of the portable information terminal 700 illustrated in FIG. 10A includes a number of configurations that are not essential to the present embodiment, such as the sensor unit 760, but the present embodiment may be configured without these components. There is no loss of effect. Further, a configuration not shown in the figure 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 of the present embodiment, and shows a software configuration in the ROM 703, the RAM 704, and the storage unit 710. In this embodiment, a basic operation program 7001 and other operation programs are stored in the ROM 703, and a cooperation control program 7002 and other operation programs are stored in the storage unit 710. In addition, 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 necessary for accessing the television receiver and each server device, It is assumed that various information storage areas for storing other various information are provided.

  A 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 constitute a basic operation execution unit 7101. Similarly, the cooperative control program 7002 stored in the storage unit 710 is also expanded in the RAM 704, and the main control unit 701 executes the expanded cooperative control program to configure the cooperative control execution unit 7102. The RAM 704 includes a temporary storage area that temporarily stores data created when each operation program is executed as necessary.

  In the following, in order to simplify the explanation, the main control unit 701 executes the basic operation execution by executing the basic operation program 7001 stored in the ROM 703 by expanding the basic operation program 7001 in the RAM 704 and executing it. It is described that the unit 7101 controls each operation block. The same description is made for other operation programs.

  The cooperation control execution unit 7102 performs management such as device authentication and connection, transmission / reception of each data, and the like when the portable information terminal 700 performs a link operation with the television receiver. In addition, the cooperation control execution unit 7102 includes a browser engine function for executing an application that works in conjunction with the television receiver.

  Each operation program may be stored in the ROM 703 and / or the storage unit 710 in advance at the time of product shipment. After the product is shipped, it may be acquired from another application server 500 on the Internet 200 via the LAN communication unit 721 or the mobile telephone network communication unit 722. Further, each operation program stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 724 or the like.

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

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

  On the other hand, the information transmitted by MH-TOT is as follows. The broadcast receiving apparatus 100 is assumed to be able to acquire the current date and Japan standard time by MH-TOT. FIG. 11A shows an example of the data structure of 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 the lower 16 bits of the encoded data of the current date based on the modified Julian Date (MJD) and six standard times of Japan (Japan Standard Time: JST). It is assumed that 24-bit information represented by a binary-coded decimal (BCD) is included. It is possible to calculate the current date by performing a predetermined operation on the 16-bit encoded data of MJD. Six 4-bit binary-coded decimal numbers represent “hour” in two decimal digits by two 4-bit binary-coded decimal numbers, and decimal two by the next two 4-bit binary-coded decimal numbers. "Minute" is represented by a digit, and "second" is represented by two decimal digits by the last two 4-bit binary-coded decimal numbers.

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

  The broadcast receiving apparatus 100 according to the present embodiment has a time management function based on NTP, which is time information expressed in UTC, and decodes and synchronizes display of video, audio, subtitles, text super, and other presentation data that are broadcast signal contents. As a result, it is possible to realize a more accurate synchronization process. Furthermore, by referring to information in UTC notation instead of clock notation of the broadcasting station, video, audio, subtitles, superimposing characters, or other data, which is the content of the broadcast signal received by the broadcast signal, is acquired through the communication line route. Decoding and display synchronization processing with video, audio, subtitles, superimpose characters, or other data can also be performed.

  Furthermore, the broadcast receiving apparatus of 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 MH-TOT, and presents the current time to the user. What is necessary is just to use for each process which handles a process or MH-event information table (MH-EIT) demonstrated in FIG. 6B. In general, in the process of presenting the current time to the user in the broadcast receiving device, accuracy to less than a second is rarely required. In addition, each time information described in the MH-event information table (MH-EIT) is represented by six 4-bit binary-coded decimal numbers in the same manner as the EIT of the conventional digital broadcast transmitted by the MPEG2-TS system. The 24-bit information is stored in “decimal” two-digit “hour”, “minute”, and “second”. For this reason, it is because the time management function based on MH-TOT in the broadcast receiving apparatus 100 of the present embodiment is easily matched with the process using MH-EIT. Specifically, the process using the MH-EIT includes a program table generation process (described later), a recording reservation and viewing reservation control, a copyright management process such as temporary storage, and the like. This is because the accuracy of subseconds is rarely required for any processing, and accuracy in units of one second is sufficient.

  In addition, copyright management processing such as program table generation processing, recording reservation and viewing reservation control, and temporary storage is a function that is also installed in a receiver of a conventional digital broadcasting system using the MPEG2-TS system. . Then, also in the broadcasting system of the present embodiment, the conventional MPEG2-TS system digital broadcasting system is used in the processing such as program table generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, etc. If it is configured so that it can be handled by consistent time management processing, a broadcast receiving apparatus having both a conventional MPEG2-TS digital broadcast reception function and an MMT digital broadcast reception function is configured. In these processes (program table generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, etc.), it is not necessary to design a processing algorithm separately, thereby reducing costs. can do.

  In addition, even a receiver that does not have a conventional MPEG2-TS digital broadcast reception function and has only an MMT digital broadcast reception function, program table generation processing, recording reservation and viewing reservation control, Even if the algorithm of copyright management processing such as temporary storage is not completely newly created, the algorithm of the function installed in the receiver of the conventional digital broadcasting system using the MPEG2-TS system can be diverted. It can be developed at a 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 (program table generation process, recording reservation / viewing reservation control, copyright management process such as temporary storage). Thus, even an MMT digital broadcast broadcast receiving apparatus can be provided at a lower cost by improving the consistency with the conventional broadcast system.

  As described above, the broadcast receiving apparatus 100 according to the present embodiment includes a time management function using two types of time information with different accuracy. One time information is notation time information consistent with the conventional digital broadcasting system, and the other time information is time information with higher resolution than the one time information. By using it for the synchronization processing of each content data, it realizes more advanced information presentation processing than the conventional broadcasting system, and the former time information can be used for program schedule generation processing, recording reservation and viewing reservation control, temporary storage, etc. By using it for the right management process etc., the broadcast receiving apparatus can be provided at low cost.

  Therefore, the broadcast receiving apparatus 100 of the present embodiment can achieve both higher-level information presentation processing and cost reduction by providing the two types of time management functions described above.

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

  In the first modification, in order to increase the accuracy of the management time of the time management function based on NTP already described with reference to FIG. 7C, from the time management server (not shown) or the broadcast station server 300 to the broadcast receiving device 100. The information related to the estimated delay time in the time information transmission is transmitted by including in the broadcast signal, and the broadcast receiving apparatus 100 is configured to use the information related to the estimated delay time to correct the system clock of the time management function based on NTP. Also good.

  At this time, the information on the estimated delay time may be transmitted within the TMCC (Transmission and Multiplexing Configuration Control) area outside the TLV multiplexed stream, not within the TLV multiplexed stream shown in FIG. good. If the transmission is performed in the TMCC area, the broadcast receiving apparatus 100 can extract information on the estimated delay time without going through a TLV multiplexed stream separation process (demux process). That is, it is possible to acquire information that is not easily affected by the delay caused by the separation process in the broadcast receiving apparatus 100, and therefore it is possible to perform a highly accurate system clock correction process. An example of a data structure of time information transmitted by the TMCC signal will be described with reference to FIG. 13C. For example, the time information may be stored in the TMCC extended information area and transmitted. In the time information in the TMCC extension information area of FIG. 13C, the “delta” parameter is a 32-bit transmission delay value from the time management server that distributes the UTC or the server device that generates the TMCC signal to the general broadcast receiving device. It is expressed with a signed fixed point. 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 when the TMCC signal is transmitted from the server device in the NTP time stamp length format. The upper 32 bits represent the integer part, and the lower 32 bits represent the decimal part.

  In the first modification, the broadcast receiving apparatus 100 according to the present embodiment includes information related to the assumed delay time described in the time information stored and transmitted in the TMCC extended information area (for example, the above-described “delta”). By using the parameter and / or “transmit_timestamp” parameter), the system clock of the time management function based on the 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 time management in the broadcasting system of the present embodiment will be described below.

  As described above, the broadcast receiving apparatus 100 according to the present embodiment has a time management function for managing the time by acquiring the current date and the Japan standard time based on information transmitted by MH-TOT. The current date and Japan standard time acquired by information transmitted by MH-TOT are superimposed on video information, application information, and the like by the video synthesizing unit 161 of the broadcast receiving apparatus 100, thereby being displayed on the monitor unit 162 and the video output unit 163. 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 current time from the “JST_time” parameter of the MH-TOT.

  However, since the above-mentioned “JST_time” parameter uses only the lower 16 bits of the encoded data of MJD, an overflow occurs with “April 22, 2038”, and the predetermined calculation is performed. The date after “April 23, 2038” alone cannot be expressed. Therefore, in the second modification of the present embodiment, the date after “April 23, 2038” is expressed by switching the calculation method between the case where the value of MJD is greater than or equal to the predetermined value and the case where it is less than the predetermined value. It shall be controlled as possible.

  FIG. 12 shows an example of the first calculation method used when the MJD value is greater than or equal to a predetermined value and the second calculation method used when the MJD value is less than the predetermined value. For example, when the predetermined value is “32768 (0x8000)”, when the MJD is “32768” or more, the current date is calculated using the first calculation method, and when the MJD is less than “32768”. Calculates the current date using the second calculation method. The case where MJD is less than “32768” is equivalent to the case where the most significant bit of 16-bit data of MJD is “0”. Thereby, 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 arbitrarily set, and the predetermined value may be set to “16384 (0x4000)”, “49152 (0xC000)”, or the like. The calculation method switching condition may be that the upper 2 bits of the 16-bit data of MJD are “00” and the upper 2 bits of the 16-bit data of MJD are not “11”. When the above-mentioned means is used with the predetermined value being “32768”, dates before “September 4, 1948” cannot be expressed, but there is no particular problem in practical use as a television receiver. .

  Further, 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 of the MH-TOT data structure shown in FIG. You may make it switch said 1st calculation method and said 2nd calculation method according to the flag which replaced a part or all, or the newly added flag. For example, when the most significant bit of MJD 16-bit encoded data is “0”, the flag is set to “1” if the MJD indicates “April 23, 2038” or later. 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 may be used, and when the flag is “0”, the first calculation method may be used. Alternatively, a descriptor having the same meaning as the flag may be newly prepared and arranged in the MH-TOT.

  In the broadcasting system of the present embodiment, as described above, the NTP format absolute time is transmitted, and the broadcast receiving apparatus 100 of the present embodiment has a time management function based on the NTP. Furthermore, in the broadcast receiving apparatus 100 according to the present embodiment, the decoding timing and presentation for each presentation unit of the video / audio signal are referred to by referring to the NTP timestamp described in the MPU timestamp descriptor set for each MPU. The timing is controlled. As described above, the time information in the NTP format has the configuration shown in FIG. 13A. The MPU time stamp descriptor has the configuration shown in FIG. 13B.

  For this reason, in the broadcast receiving apparatus 100 according to the present embodiment, the “reference_timestamp” parameter, the “transmit_timestamp” parameter, the “mpu_presentation_time” parameter, or the like is referred to, and the first reference is made according to the value of the referenced time data or the like. Either one of the calculation methods and the second calculation method may be selected. That is, for example, when the most significant bit of the 64-bit time data in the NTP length format is “0”, the second calculation method is used, and when it is not “0”, the first calculation method is used. And so on.

  In any of the above methods, the broadcast receiving apparatus 100 according to the present embodiment can represent dates after “April 23, 2038”.

[Broadcast receiving device channel selection processing (initial scan)]
The AMT of the broadcasting system according to the present embodiment provides a list of multicast groups of IP packets for receiving IP packets transmitted by the TLV multiplexing method as distinctly as possible from IP packets transmitted through a communication line. Shall. It is possible to list a plurality of IP multicast groups in one service identification. In addition, an address mask can be used to efficiently describe successive 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 nonvolatile 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 services can be stored in the nonvolatile memory in association with the services as IP related information. To do. By storing the list of services and IP-related information in a nonvolatile memory so that they can be referred to at all times, there is no need to re-acquire TLV-NIT or AMT when switching channels, etc., and broadcast content can be acquired efficiently. Can be done.

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

  When the channel scan is started, the reception function execution unit 1102 sets an initial frequency value to the tuner / demodulation unit 131 and instructs the tuner / demodulation unit 131 to perform tuning 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 next acquires TLV-NIT from the received signal (S103).

  When 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. The TLV stream ID information can be acquired from the “tlv_stream_id” parameter, and the original network ID information can be acquired from the “original_network_id” parameter. Furthermore, distribution system information regarding the physical conditions of the broadcast transmission path corresponding to each TLV stream ID / original network ID is acquired from the distribution system descriptor (S106), and a list of service IDs is acquired from the service list descriptor ( 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, original network ID, distribution system information, and service ID list, the processes of S105 to S107 are repeated. Next, the reception function execution unit 1102 creates a service list based on data such as the TLV stream ID, original network ID, distribution system information, and service ID list acquired in the processes of S105 to S107. The service list is stored in the ROM 103 or the storage unit 110 (updated when rescanning) (S108).

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

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

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

  Through the above-described series of processing, the broadcast receiving apparatus 100 according to the present embodiment is able to create a list of services (service list) that configure the broadcast network at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change. Simultaneously with the creation / update, a list of IP multicast groups (IP related information) corresponding to each service can be created / updated, and further stored in a non-volatile memory such as the ROM 103 or the storage unit 110.

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

[Broadcast receiving device channel selection processing (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 apparatus 100 according to the present embodiment.

  When the user operates a remote controller (not shown) to instruct channel switching, the reception function execution unit 1102 interprets the command transmitted from the remote controller and designates the service ID of the target service (S201). Next, reception function execution section 1102 starts acquiring AMT from the received signal of tuner / demodulation section 131. If acquisition of the AMT is successful within a predetermined time (S202: Yes), information on a list of IP multicast groups corresponding to the service ID is acquired from the acquired AMT (S204). On the other hand, if acquisition of the AMT is not successful within a 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 on the list of multicast groups is acquired (S204). Note that the IP-related information stored in the ROM 103 or the storage unit 110 may always be referred to without performing the determination process of S202.

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

  In the separation unit 132, the transport processing unit 1102a acquires an MMTP packet with a packet ID “0” from the input MMT data string (S209), and further acquires an MPT included in the acquired MMTP packet. (S210). Next, the transport processing unit 1102a refers to the “MMT_package_id_byte” parameter of the acquired MPT, and confirms 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 with the packet ID “0” It is determined that the packet is an MMTP packet having program data corresponding to the service ID, and acquisition of MFU is executed based on the information of the acquired 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 program data corresponding to the service ID. Judge that it is not a packet. In this case, the transport processing unit 1102a acquires the PLT again (S212), and checks the acquired PLT, thereby checking the packet ID of the MMTP packet that transmits the MPT having the “MMT_package_id_byte” parameter corresponding to the service ID. (X is assumed) is confirmed (S213). Further, the transport processing unit 1102a acquires an MMTP packet whose packet ID is “x” from the input MMT data string (S214), and acquires the MPT included in the acquired MMTP packet (S215). Furthermore, 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 the MMTP packet other than the packet ID “0”, the processing time can be shortened.

  When acquiring the MFU in the process of S216, the transport processing unit 1102a extracts encoded video data, encoded audio data, and the like from the acquired MFU, and outputs them to the video decoder 141, the audio decoder 143, and the like. In the following, video / audio decoding processing based on the control of the AV decoding processing unit 1102b and presentation processing based on the control of the presentation processing unit 1102h are performed. However, since each processing is known, detailed description thereof is omitted.

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

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

  In particular, in the figure, the “left_top_pos_x” parameter and the “right_down_pos_x” parameter indicate the horizontal position at the upper left and lower right 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 indicate the vertical position at the upper left and the lower right of the area when the upper side of the full screen display is “0” / lower side is “100”. It shall be shown by the ratio with respect to the total number of pixels. The “layer_order” parameter indicates the relative position in the depth direction of the region.

  Examples of layout allocation to layout numbers based on the settings of the parameters are shown in FIGS. 19A to 19D together with the setting values of the parameters.

  FIG. 19A is a default layout setting of the broadcast receiving apparatus 100 of the present embodiment, and is an example 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 areas, and the areas are “area 0”, “area 1”, and “area 2”. For example, when the number of pixels on the whole screen is 7680 horizontal / vertical 4320 pixels, “area 0” has “left_top_pos_x” parameter of “0”, “left_top_pos_y” parameter of “0”, and “right_down_pos_x” parameter of “80” ”,“ Right_down_pos_y ”parameter is“ 80 ”, and is set in the range of (0, 0) − (6143, 3455). Similarly, “area 1” is set in the range of (6144,0) − (7679,4319), and “area 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 to a 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 “area 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 (portable information terminal 700 in this embodiment). This is an example of the case.

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

  Note that fractions after the decimal point generated when the screen is divided according to the set value of the parameter such as “left_top_pos_x” may be rounded up or down. Rounding off (or rounding to zero in a binary number) may be used. For example, the number of pixels of the entire screen is 7680 pixels / vertical 4320 pixels, the “left_top_pos_x” parameter of “region 0” is “0”, the “left_top_pos_y” parameter is “0”, the “right_down_pos_x” parameter is “51”, “right_down_pos_y_ When the parameter is “51”, “Region 0” may be set in the range of (0, 0) − (3916, 2203) by rounding up processing, or (0, 0) − (3915, 2202) may be set to “area 0”. Further, rounding up / down processing in units of 8 pixels or 16 pixels may be performed in consideration of a macroblock in video compression processing. By the processing, it is possible to efficiently perform region setting based on LCT and resolution conversion processing of multimedia content in the region.

[Exceptional processing for screen layout control of broadcast receivers]
In the broadcast receiving apparatus 100 of the present embodiment, even when the area control of the screen layout is performed by the above-described LCT, when the display of the EPG screen is instructed by the user, as an exception process, It is possible to perform screen layout control ignoring the description content of the LCT. FIG. 20A shows an example of the operation of exception processing for screen layout control based on LCT.

  The screen layout control similar to that in FIG. 19B is performed based on the description of the LCT, the broadcast program video is displayed in “Area 0”, and the program linkage data linked to the broadcast program is broadcasted in “Area 1” and “Area 2”. When the user instructs display of the EPG screen with a remote controller (not shown) while the content is displayed, the broadcast receiving apparatus 100 according to the present embodiment describes the LCT description as shown in FIG. 20A (A). Regardless of the contents, the screen layout setting is returned to the default setting (that is, the state in which the screen layout control similar to FIG. 19A is performed), and the EPG screen is controlled to be displayed on the entire screen. Further, when the user instructs the display end of the EPG screen, the screen layout control according to the description content of the LCT is re-executed.

  By performing the above-described control, the EPG screen can be displayed larger than 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 visibility.

  The exception process 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). ) May be applied when a sub-screen is displayed or when a two-screen is displayed.

  In the case of the recording setting screen shown in FIG. 5A, the broadcast content display area is changed from the entire screen to only the sub-screen portion at the lower right of the screen. Similarly, in the case of the two-screen display shown in FIG. 5B, the broadcast content display area is changed from the entire screen to only the divided screen portion on the left side of the middle stage of the screen. In any case, the display area for displaying the broadcast content is narrower than the case where 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 that a plurality of broadcast contents are displayed at the same time. Therefore, in the broadcast receiving apparatus 100 of the present embodiment, only the broadcast content of “area 0” is selected and displayed in the display area in the above situation. Note that the broadcast content of “region 1” or “region 2” may be selected and displayed according to the immediately preceding region selection situation.

  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 content is displayed while maintaining the area control of the screen layout. The same applies to the sub-screen display on the recorded program list screen and the browser display of Internet content.

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

  FIG. 22A is a diagram illustrating an example of an EPG screen in the broadcast receiving apparatus 100 of the present embodiment. The EPG screen 162a has a matrix shape with the vertical axis representing time and the horizontal axis representing service ID (channel), and displays detailed information of broadcast programs broadcast on each channel in each time slot. The detailed information 162a1 of each broadcast program is mainly composed of a title area 162a2 and a detailed description area 162a3.

  The title area 162a2 displays a program title of the broadcast program, a symbol representing the attribute of the broadcast program, and the like. The symbol or the like indicating the attribute of the broadcast program is, for example, a symbol / character indicating a new program, a symbol / character indicating a re-broadcast program, or the like. Alternatively, it may be a mark or the like that symbolizes “data” meaning that it corresponds to data broadcasting by a broadcasting service. Moreover, the mark 162a4 etc. which symbolized "NetWork" which means that the content, application, etc. relevant to the said broadcast program are acquirable from a network may be sufficient. Further, by distinguishing the background color of the detailed information 162a1 from others, or by surrounding the display area of the detailed information 162a1 with a thick frame, symbols or the like representing the attributes of the broadcast program may be substituted.

  This is a case where each control information (message, table, descriptor, etc.) in the broadcasting system of the present embodiment indicates that content, application, etc. related to the broadcast program can be acquired from the network. However, if the LAN communication unit 121 of the broadcast receiving apparatus 100 is not connected to the LAN communication unit 121 and cannot access each server apparatus on the network, the mark 162a4 symbolized “NetWork” is used. Etc. may be controlled so as not to be displayed.

  In addition, the broadcast program is a distribution program distributed via the Internet 200 and cannot be obtained only from the broadcast wave. Further, as described above, the broadcast receiving device 100 is connected to each server device on the network. For example, when it is in a state in which the user cannot access, detailed information 162b1 displayed on the EPG screen 162b may be grayed out as shown in FIG. 22B. That is, control is performed so as not to display the detailed information of the distribution program that cannot be viewed. Further, the background color of the detailed information 162b1 may be differentiated from the others to replace the grayout process. When the detailed information 162b1 is selected by operating a remote controller (not shown), the broadcast receiving apparatus 100 is in a state where it cannot access each server apparatus on the network, or the distribution program associated with the detailed information 162b1 is viewed. You may make it alert | report to a user by a popup etc. that it cannot do.

  Through the above-described controls, the broadcast receiving apparatus 100 can provide program information of each broadcast program in a format that is less uncomfortable to the user according to the network connection status.

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

  As shown in the figure, when there is a channel having only a distribution program distributed via the Internet 200, all channels (including information 162c1) are normally displayed as shown in the EPG screen 162c of FIG. Control to display the information. On the other hand, when the broadcast receiving device 100 cannot access each server device on the network, as shown in the EPG screen 162d of FIG. Control may be performed so as not to display the channel information (information 162c1 in FIG. 1A) of “M2 broadcast (net broadcast)”.

  With the above-described controls, the user of the broadcast receiving apparatus 100 can make it unnecessary to confirm information on channels that cannot be viewed by the user.

[Emergency warning broadcast display of broadcast receiver]
The broadcast receiving apparatus 100 according to the present embodiment performs emergency alert broadcast reception processing when the emergency alert broadcast activation control signal bit of the TMCC signal included in the transmission data including the TLV stream changes from “0” to “1”. It shall be possible to do.

  The emergency alert broadcast may be provided as a full-screen display application, or may be provided as character information at a character supermarket. When the emergency alert broadcast is provided as text information at the text superimpose, it is preferable to display the text information of the text supermarket 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 a user views a normal broadcast program and receives an emergency warning broadcast in a state where the program screen 162e of the broadcast program is displayed on the monitor unit 162, the emergency warning broadcast The character information 162e1 is displayed superimposed on the program screen 162e. Similarly, when the user gives an instruction to display the EPG screen and the emergency warning broadcast is received while the EPG screen 162f is displayed on the monitor unit 162, the character information 162f1 by the emergency warning broadcast is superimposed on the EPG screen 162f. Control to display.

  By the above-described control, in the broadcast receiving apparatus 100 of the present embodiment, even when the user selects and displays an EPG screen, various setting screens, a recorded program list screen, an Internet browser, etc., an emergency warning broadcast Is received, it is possible to avoid overlooking important text information based on the emergency alert broadcast. Note that this control may be performed on character information of a normal character supermarket that is not based on emergency alert broadcasting.

[Various exception handling]
When the broadcast receiving apparatus 100 according to 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 supported by the broadcast receiving apparatus 100 of the present embodiment, the location information stored in the MPT (corresponding to “MMT_general_location_info ()” in FIG. 17) Data to be acquired and data to be acquired through a route other than the TLV stream can be included in the same package. However, the data transmission path (for example, IPv4 data flow, IPv6 data flow, broadcast MPEG2-TS, etc.) other than the TLV stream indicated by the location information is a reception function different from the reception function of the TLV / MMT stream. Therefore, even when the broadcast receiving apparatus 100 is operating, the situation where the reception function of these transmission paths is not operating, the situation where the receiving function itself is operating but the relay apparatus is not operating, There may be situations in which data cannot be acquired from these transmission paths, such as a situation where the transmission path is not wired or wirelessly connected, or a situation where the broadcast receiving apparatus 100 is installed in an environment where these transmission paths cannot be connected in the first place. .

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

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

  As shown in FIG. 19B and FIG. 19C, the LCT sets a plurality of areas in the screen, displays the video included in the TLV stream in “Area 0”, and displays in “Area 1” and “Area 2”. In this case, the data acquired on the transmission path other than the TLV stream is associated with the display so that the data on the transmission path other than the TLV stream to be displayed in “area 1” or “area 2” cannot be acquired. As another example of the operation, a display frame of a plurality of areas shown in FIGS. 19B and 19C indicated by the LCT is temporarily displayed, and a background color or a predetermined still image is displayed for “area 1” and “area 2”. If data of a transmission path other than the TLV stream indicated by the MPT location information cannot be acquired even after a predetermined time has elapsed, display switching is performed to return to the default layout display state shown in FIG. 19A. And it may be. In this case, even when the layout of FIGS. 19A, 19B, and 19C is changed, if the program video included in the TLV stream is continuously displayed in “area 0”, the user program video itself Is preferable because it continues.

  In addition, since the data of the transmission path other than the TLV stream to be displayed in “area 1” or “area 2” cannot be acquired, the content received in the TLV stream in “area 0” of the default layout display illustrated in FIG. 19A. The operation of various communication functions and various reception functions of the broadcast receiving apparatus 100 according to the present embodiment is started, and the communication environment, communication status, and various reception functions of the various communication functions are started. Due to the change in the reception environment and the reception situation, there may be a situation in which data of a transmission path other than the TLV stream to be displayed in “area 1” or “area 2” can be acquired. In this case, the broadcast receiving apparatus 100 according to the present embodiment immediately switches from the default layout display shown in FIG. 19A to the layout of a plurality of areas as shown in FIGS. 19B and 19C indicated by the LCT, and changes the TLV to “area 0”. 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 “area 1” or “area 2”. Further, the layout change may be executed after an instruction to change from the default layout to the layout indicated by the LCT is input from the operation input unit 170 without performing the layout change immediately.

[Copyright protection function]
In the digital broadcasting system supported by the broadcast receiving apparatus 100 of this embodiment, by transmitting the MPT including the copy control information, for example, “unlimited copy is possible” (“unlimited copy is possible and storage is possible”). And “Encryption required at output” and “Unlimited copy allowed and no encryption required during storage and output”), “Only one generation can be copied”, “Multiple times can be copied” ( For example, the copy control state of the content referred to by the MPT, such as “dubbing 10”), “copy prohibited”, or the like may be transmitted. In this case, the broadcast receiving apparatus 100 according to the present embodiment stores the content in the storage (storage) unit 110, records it on a removable recording medium, outputs it to an external device, and outputs it to the external device according to the copy control information. Copying, moving processing to an external device, and the like may be controlled. The target of the accumulation process may include not only the storage (accumulation) unit 110 inside the broadcast receiving apparatus 100 but also a record that has been subjected to a protection process such as an encryption process so that it can be reproduced only by the broadcast receiving apparatus 100. . Specifically, the storage processing target includes an external recording device and the like that can be recorded and reproduced only by the broadcast receiving device 100.

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

  First, when the copy control information included in the MPT indicates “unlimited copying is possible”, the broadcast receiving apparatus 100 according to the present embodiment stores data in the storage (storage) unit 110, records on a removable recording medium, and external devices. You can output to, copy to an external device, and move to an external device without restriction. However, if "Unlimited copy is possible and encryption is required for storage and output" and "Unlimited copy is possible and encryption is not required for storage and output" are separated, "Unlimited copy is possible and storage and output is required" When "encryption processing is sometimes required", storage in the storage unit 110, recording on a removable recording medium, output to an external device, copying to an external device, and movement processing to an external device are limited to the number of times However, it is necessary to perform encryption processing.

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

  In addition, when the copy control information included in the MPT indicates “copying is allowed a predetermined number of times”, the broadcast receiving apparatus 100 according to the present embodiment can be encrypted and stored in the storage (storage) unit 110. When the stored content is output to an external device for viewing, the content is encrypted and output together with “copy prohibited” copy control information. However, a predetermined number of copying and moving processes may be performed on the external device. In the case of 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 this embodiment prohibits copying to the storage (accumulation) unit 110. However, the broadcast receiving apparatus 100 stores the storage (accumulation) unit 110 only for a predetermined time specified in advance or for a predetermined time specified by control information included in the broadcast signal (for example, by the MH-Expire descriptor shown in FIG. 6D). In the case of having a “temporary storage” mode that enables the storage (storage) to be stored in the storage (storage) unit 110 even if the copy control information included in the MPT indicates “copy prohibited”. The content can be temporarily stored. When the content whose copy control information included in the MPT is “copy prohibited” is output for viewing on an external device, the content is encrypted and output together with the copy control information “copy prohibited”.

  Note that viewing output to the external device described above may be performed via the video output unit 163 and the audio output unit 166 of FIG. 7A, the digital I / F unit 125, the LAN communication unit 121, or the like. The copying or moving process to the external device described above may be performed via the digital I / F unit 125, the LAN communication unit 121, etc. 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.

  In addition, the copy control information is a copy process to an external device via the LAN communication unit 121 that indicates copy restrictions such as “copying is possible for only one generation”, “copying is allowed a predetermined number of times”, “copy prohibited”, etc. Is possible only when the IP address of the external device that 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 100 IP addresses, it may be prohibited. Content whose copy control information is “unlimited copy available and requires encryption processing during storage and output” may be handled in the same manner.

  Similarly, once the copy control information indicates a copy restriction such as “copying is possible for only one generation”, “copying is allowed a predetermined number of times”, “unlimited copying is possible and encryption processing is required when storing and outputting” once. In the process of storing in the storage (storage) unit 110 and then moving to the external device via the LAN communication unit 121, the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 is the broadcast receiving device 100. If the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100, it may be prohibited.

  In principle, the viewing video output and audio output of the content stored in the storage (storage) unit 110 of the broadcast receiving apparatus 100 are received by the IP address of the external device that is the destination of the transmission packet from the broadcast receiving apparatus 100. This is possible only when the IP address of the apparatus 100 is in the same subnet, 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, registration processing as a device in which the external device is connected within the same subnet as the IP address of the broadcast receiving device 100 within a predetermined period and can be viewed 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 (accumulation) of the broadcast receiving device 100 to the external device The content stored in the unit 110 may be configured to enable viewing video output and audio output. In this case, the viewing video output and audio output are performed by encrypting the content.

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

  Next, as described with reference to FIG. 6E, in the digital broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment, the location information in the MPT (“MMT_general_location_info ()” in FIG. 17) Data acquired through a different route (IPv4, IPv6, MPEG2-TS, URL, etc.) from the acquired data may also be included in the same package and the same event as the data acquired by the TLV stream, but at this time, it is copied to the MPT. Content protection in the case where control information is included will be described.

  First, when copy control information is included in MPT, the data included in the same package and the same event in the location information is different from the data acquired by the TLV stream of the broadcast route (IPv4, IPv6, MPEG2-TS, URL, etc. The data acquired in (1) may be controlled according to the copy control information included in the TLV stream. As described above, the copy control status of the specified content based on these copy control information is “Unlimited copy allowed” (“Unlimited copy allowed and encryption required during storage and output”) and “Unlimited copy allowed” In addition, it may be divided into two types, “no encryption processing is required at the time of storage and output”), “copying is possible for only one generation”, “copying for a predetermined number of times” (for example, copying is possible 9 times + movement is allowed once) “Dubbing 10”), “copy prohibited”, etc. can be specified.

  Here, when the data position 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 the other digital broadcast signal. Being broadcast. Then, according to which information the copy control of the MPEG2-TS data is performed (whether it follows the copy control information included in the TLV / MMT stream or the copy control information included in the MPEG2-TS) becomes a problem. .

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

<Operation example 1>
In the first operation example, when the MPT includes copy control information and the data included in the same package and the same event as the location information includes 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 controlled with priority 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 “one generation copy is permitted”, and the copy control status indicated by the copy control information included in the MPEG2-TS is “predetermined multiple times of copying”. If there is, even if it is data acquired by a different route (MPEG2-TS transmission format digital broadcasting) from the data acquired by the TLV stream, the copy control may be performed as the content of “one generation copy is possible”. For example, the copy control state indicated by the copy control information included in the TLV stream is “unlimited copying is allowed”, and the copy control state indicated by the copy control information included in the MPEG2-TS is “predetermined to allow multiple times of copying”. If there is, even if the data is acquired through a different route (MPEG2-TS transmission format digital broadcasting) from the data acquired by the TLV stream, the copy control may be performed as the content of “unlimited copying”.

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

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

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

  In addition, as a result of the comparison, the copy control state indicated by the copy control information included in the MPEG2-TS is the same as the copy control state indicated by the copy control information included in the TLV stream or a looser copy control state. For the MPEG2-TS data included in the same package and the same event in the location information, copy control may be performed as 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 acquired through a route other than the TLV stream, copying on the broadcast receiving apparatus 100 of this embodiment is performed while respecting the original copy control information set in the broadcast system that transmits the data. Duplicate control states can be eliminated.

  In the above description, the copyright protection function of the broadcast receiving apparatus 100 of the present embodiment has been described as being performed based on the copy control information included in the MPT. However, the table for arranging copy control information is not limited to MPT. In addition to MPT, the MH-service description table (MH-SDT), MH-event information table (MH-EIT) described in FIG. You may perform a copyright protection process.

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

  Hereinafter, Example 2 of the present invention will be described. The configuration, processing, effects, and the like in the present embodiment are the same as those in the first embodiment unless otherwise specified. For this reason, below, the difference between a present Example and Example 1 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible. In the following description, the broadcast receiving apparatus according to the present embodiment is a television receiver that supports both the MMT system and the MPEG2-TS system as the media transport system.

[Hardware configuration of broadcast receiver]
FIG. 24 is a block diagram illustrating an example of an internal configuration of the broadcast receiving apparatus 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 expansion interface unit 824, a digital interface unit 825, a first tuner / demodulation unit 831, a second tuner / Demodulator 832, MMT decode processor 841, MPEG2-TS decode processor 842, video synthesizer 861, monitor 862, video output 863, audio synthesizer 864, speaker 865, audio output 866, operation input 870 , Composed of.

  Main control unit 801, system bus 802, ROM 803, RAM 804, storage unit 810, expansion 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, Are the main control unit 101, system bus 102, ROM 103, RAM 104, storage (storage) unit 110, expansion interface unit 124, digital interface unit 125, monitor unit 162, video output unit 163 in the broadcast receiving apparatus 100 of the first embodiment. The speaker unit 165, the audio output unit 166, the operation input unit 170, and the like have the same functions, and detailed description thereof is omitted.

  The first tuner / demodulator 831 receives a broadcast wave of a broadcast service that employs MMT as a media transport method via an antenna (not shown), and a service desired by the user based on the control of the main controller 801. (Tune to) the selected channel. Further, the first tuner / demodulator 831 demodulates the received broadcast signal to acquire an MMT data string, and outputs it to the MMT decode processor 841. The second tuner / demodulation unit 832 receives a broadcast wave of a broadcast service that employs MPEG2-TS as a media transport method via an antenna (not shown), and receives a user's request based on the control of the main control unit 801. Tune in (tune to) the channel of the service you want to use. Further, the second tuner / demodulation unit 832 demodulates the received broadcast signal to acquire an MPEG2-TS data string, 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 the control signal included in the MMT data sequence, a video data sequence, an audio data sequence, which are real-time presentation elements, Separation processing, decoding processing, and the like of the character super data sequence and the caption data sequence are performed. The MMT decoding processing unit 841 includes a separation unit 132, a video decoder 141, a video color gamut conversion unit 142, an audio decoder 143, a character super decoder 144, a subtitle decoder 145, a subtitle synthesis unit 146, in the broadcast receiving apparatus 100 according to the first embodiment. It is assumed that functions equivalent to a caption color gamut conversion unit 147, a data decoder 151, a cache unit 152, an application control unit 153, a browser unit 154, an application color gamut conversion unit 155, a sound source unit 156, and the like are provided. 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 be omitted.

  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, video data that is a real-time presentation element Separation processing, decoding processing, and the like of the sequence, the audio data sequence, the character super data sequence, the caption data sequence, and the like are performed. The MPEG2-TS decoding processing unit 842 has a function equivalent to an IRD (Integrated Receiver Decoder) unit of a conventional television receiver that receives broadcast waves of a broadcasting service that employs MPEG2-TS as a media transport system. Detailed description is omitted.

  The video composition unit 861 inputs the video information, subtitle information, and application information output from the MMT decode processing unit 841, and the video information, subtitle information, and application information output from the MPEG2-TS decode processing unit 842. Processing such as selection and / or superimposition is performed as appropriate. The video composition 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. In addition, the video composition unit 861 performs scaling processing, EPG screen information superimposition processing, and the like as necessary based on the control of the main control unit 801. The voice synthesis unit 164 receives the voice information output from the MMT decoding processing unit 841 and the voice information output from the MPEG2-TS decoding processing unit 842, and performs processing such as selection and / or mixing as appropriate.

  The LAN communication unit 821 is connected to the Internet 200 via the router device 200r, and transmits / receives data to / from each server device and other communication devices on the Internet 200. Also, an MMT data string (or part thereof) or an MPEG2-TS data string (or part thereof) of a program transmitted via a communication line is acquired, and an MMT decoding processing unit 841 or MPEG2-TS is appropriately selected. The data is output to the decoding processing unit 842.

[Time display of broadcast receiver]
In the broadcast receiving apparatus 800 of the present embodiment, 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 current time is transmitted by MH-TOT or the like in a broadcast service that employs MMT as a media transport system, and MPEG-TS in a broadcast service that employs MPEG2-TS as a media transport system. 2 is transmitted by TOT (Time Offset Table) or the like provided in SI (Service Information) defined in the system. 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 composition unit 861 mainly selects the video information output from the MMT decoding processing unit 841, the information on the current date and the current time acquired from the MH-TOT is displayed. When the video composition unit 861 mainly selects the video information and the like output from the MPEG2-TS decoding processing unit 842, the information related to the current date and the current time acquired from the TOT is superimposed on the video information and the like. What is necessary is just to control so that it may superimpose on image | video information etc.

  However, there is a difference in encoding processing / decoding processing, transmission path, etc. between a broadcasting service that employs MMT as a media transport method and a broadcasting service that employs MPEG2-TS as a media transport method. However, there is a possibility of inconsistency between the selection of a broadcast service that employs MMT as the media transport method and the selection of a broadcast service that employs MPEG2-TS as the media transport method. For example, as shown in FIG. 25, an EPG displaying channel information of a broadcast service adopting MPEG2-TS as a media transport method from an EPG screen 162g displaying channel information of a broadcast service adopting MMT as a media transport method. When the screen display is switched to the screen 162h, there is a possibility of causing the user to feel a visual discomfort due to inconsistency due to switching of the current time display from the current time display 162g1 to the current time display 162h1.

  In the broadcast receiving apparatus 800 according to the present embodiment, even when the video composition unit 861 mainly selects video information output from the MMT decoding processing unit 841 in order to prevent the user from having a visual discomfort. , Control is performed so that information relating to the current date and the current time acquired from the TOT is superimposed on the video information and the like. That is, control is performed so as to superimpose the current time information provided by the broadcast service adopting MPEG2-TS as the media transport method on the content of the broadcast service adopting 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 acquired by referring to the TOT when displaying the current time. Therefore, even when switching between a broadcast service that employs MMT as the media transport method and a broadcast service that employs MPEG2-TS as the media transport method, the user feels a visual discomfort due to inconsistent display of the current time. Can be prevented.

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

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

  Note that, as described above, control is performed so that the current time information provided by the broadcast service adopting MPEG2-TS as the media transport method is superimposed on the content of the broadcast service adopting MMT as the media transport method. And any case of controlling to superimpose the current time information provided by the broadcast service adopting MMT as the media transport method on the content of the broadcast service adopting MPEG2-TS as the media transport method In the same manner as in the description of [Broadcast receiving apparatus time management] 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. Is possible.

[EPG display of broadcast receiver]
Event schedule information of a broadcast service adopting MMT as a media transport system is transmitted by MH-EIT or the like. On the other hand, event schedule information of a broadcast service that employs MPEG2-TS as a media transport system 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 that employs MMT as a media transport method, event schedule information (MH-EIT) of the broadcast service that employs MMT is displayed. ) Can be obtained, and when displaying video information provided by a broadcast service adopting MPEG2-TS as a media transport method, event schedule information of the broadcast service employing MPEG2-TS is displayed. (EIT) can be acquired.

  However, the broadcast receiving apparatus 800 according to the present embodiment displays MPEG-2 TS as a media transport method even when displaying video information or the like provided by a broadcast service adopting MMT as a media transport method. Even when displaying video information and the like provided by a broadcasting service adopting the above, both the MH-EIT and the EIT can be acquired, improving the usability for the user.

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

  For example, when a user operates a remote controller (not shown) to instruct display of an EPG screen while viewing a broadcast program provided by a broadcast service that employs MMT as a media transport method, an initial screen of the EPG screen (shown) (Omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on the MH-EIT of a broadcasting service that employs MMT as a media transport method. Detailed information on the broadcast program of each channel “Nearby current time” is displayed. Next, the user desires to check the detailed information of the broadcast program of each channel “October 9th” of “October 9, 2014”, and operates the remote controller (not shown) to instruct to update the EPG screen. 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 method and operates a remote controller (not shown) to instruct switching of the network, EPG A screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of this embodiment, the initial screen of the EPG screen created based on the EIT of the broadcast service adopting MPEG2-TS as the media transport system (that is, “October 7, 2014” "17: 00-" of the broadcast program detailed information of each channel), and the same time zone as the EPG screen 162i displayed immediately before (that is, "October 9, 2014" ]) To display the detailed information of the broadcast program of each channel.

  With the above-described control, the user can continuously confirm detailed information regarding broadcast programs of the same time and same time zone of a plurality of networks having different media transport methods by a simple operation. That is, the usability of the broadcast receiving apparatus 800 is improved.

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

Therefore, the user creates based on the EIT of the broadcast service adopting MPEG2-TS as the media transport method while the channel information created based on the MH-EIT of the broadcast service adopting MMT as the media transport method is confirmed. Even when it is desired to confirm the channel information, an instruction to switch the network by operating a remote controller (not shown) can be made unnecessary. Furthermore, the user can simultaneously confirm detailed information regarding broadcast programs in the same day and same time zone of a plurality of networks having different media transport methods. That is, the usability of the broadcast receiving apparatus 800 is improved.
(Example 3)

  Hereinafter, Example 3 of the present invention will be described. Note that the configuration, effects, and the like in the present embodiment are the same as those in the first and second embodiments unless otherwise specified. For this reason, below, the difference between a present Example and Example 1 and 2 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible. In the present embodiment, the handling of the presentation area information set by the layout setting table (LCT) shown in FIG. 18 will be described.

[Hardware configuration of broadcast receiver]
Since the hardware configuration of the broadcast receiving apparatus 100 is the same as that of the first embodiment, the description thereof is omitted.

[Program data structure]
FIG. 28 shows the structure of program data. The program data includes information (asset 30003) to be presented to the broadcast receiving apparatus 100 such as video, audio, and program linkage information, and control information. The program linkage information stores character information, graphic information, image information, video information, and the like for presentation in accordance with the program video. FIG. 28 shows a PA message 30000 describing the presentation method of asset 30003 and the acquisition source information in the control information. The acquisition destination of the asset 30003 is described as MMT_general_location_info (FIG. 31) in the MP table (MPT) 30001 (FIG. 17) in the PA message 30000 (FIG. 30). In addition, a layout setting table (LCT) 30100 (FIG. 18) is arranged in the PA message 30000, and the layout of the area where each asset 30003 is to be presented is described. Examples of the layout of the presentation area are shown in FIGS. 19A to 19D.

  A package list table (PLT) 30002 (FIG. 32) can be arranged in the PA message 30000, and an acquisition destination of another PA message 30000 can be described by MMT_general_location_info (FIG. 31) in the PLT. By specifying the acquisition destination of the PA message 30000, the PA message 30000 can have a hierarchical structure. The location type from which the PA message 30000 and asset 30003 are acquired is shown in FIG.

  Normally, the hierarchical structure of the PA message 30000 is up to two layers as shown in FIG. 28. However, the PLT 30002 may be further arranged in the second layer PA message 30000 to increase the number of layers.

  Since an asset is composed of a media processing unit (MPU) that is a processing unit (FIG. 29), the presentation area of the asset 30003 is designated by designating the MPU presentation area in the MPU presentation area designation descriptor (FIG. 34). specify. The MPU presentation area designation descriptor is arranged in the asset descriptor area of the MPT. Since a presentation area is designated for each MPU, a presentation method of changing the presentation area of the same asset 30003 during presentation is also possible. In order to reduce the data amount, the presentation area is not designated for all the MPUs belonging to the asset, and only the presentation area of the first MPU and the first MPU of the MPU group whose presentation area is changed is designated. This control method is also possible.

[Operation example of asset presentation]
<Operation example 1>
The broadcast receiving apparatus 100 acquires the presentation area information by reading the LCT 30100. FIG. 16 shows a flow in which the broadcast receiving apparatus 100 acquires program control information as an example of channel switching. The LCT 30100 is arranged and transmitted in the MMTP packet, similar to the MPT 30001. Since the designation information of the presentation area of the asset 30003 is described in the MPT 30001, the LCT 30100 is preferably acquired before the MPT 30001. As shown in FIG. 16, it is preferably acquired as a step between S209 and S210 and between S214 and S215. Even when the acquisition at the timing cannot be performed, it is similarly preferable if the LCT can be acquired before S216.

  The LCT 30100 is arranged in the PA message 30000, but the LCT 30100 related to the asset 30003 corresponding to the second layer PA message is arranged in the first layer PA message 30000 or in the second layer PA message 30000. To do. In presenting the asset 30003, the presentation area information of the LCT 30100 arranged in the PA message 30000 to which the asset 30003 to be presented belongs is preferentially used. When the LCT 30100 is not arranged in the PA message 30100 to which it belongs, the presentation area information of the LCT 30100 arranged in the PA message 30100 of the higher layer is used.

  By using the method of this operation example, when the same LCT 30100 is used in the entire program data of FIG. 28, if the common LCT 30100 is arranged in the PA message 30000 in the first layer, the presentation area can be displayed at an early timing. Since information can be acquired, prompt program data can be presented.

<Operation example 2>
When the LCT 30100 is not included in the MMTP packet, the presentation area information of the LCT 30100 acquired so far is used. That is, the broadcast receiving apparatus stores the presentation area information of the LCT 30100 and updates the stored presentation area information every time a new LCT 30100 is acquired.

  However, immediately after the event that the presentation area information used so far becomes invalid, such as when the power is turned on or when the channel is changed, there is no valid presentation area information yet. Even if it is acquired, there is a possibility that the data cannot be presented. Therefore, until the effective presentation area information is acquired, the presentation process is performed assuming that, for example, the presentation area illustrated in FIG. 19A is set as the provisional presentation area information. The settings in FIG. 19A are hereinafter referred to as default settings. The presentation area shown in the default setting (FIG. 19A) is a full-screen display area set for a device whose device_id is 0, that is, a main device, and 0 is assigned to layout_number, 0 is assigned to region_number, and 0 is assigned to layer_order.

  FIG. 35A shows only the main asset 30201 using the temporary presentation area information, and after obtaining the LCT 30100 in FIG. 35B, the presentation including the sub-assets 30202 is performed according to the original presentation area information of the program. It is in a state. When using the provisional presentation area information, it is assumed that the presentation area designation of the main asset is ignored, the area where layout_number is 0 and region_number is 0, and other assets are not presented. Here, the main asset means the asset that specifies the region_number0 of the main device or the asset that specifies the region_number0 in the asset transmitted by the broadcast wave, and the sub-assets mean the other assets To do.

  By setting the provisional presentation area information in this way, at least the main asset presentation process can be performed even before the information of the LCT 30100 is read.

<Operation example 3>
In operation example 2, an example in which only the main asset is presented using the default presentation area information until a new LCT 30100 is acquired at the time of channel change or the like is used. The LCT 30100 that has been used may be used. The assets (main assets) specified in the area where the region_number is 0 in the program after channel change are presented in the area where the region_number of the presentation area information used so far is 0, and the other assets (sub-assets) are displayed do not do.

  After acquiring the LCT 30100 of the program after the channel change, all the assets are presented using the presentation area information. Further, when the LCT 30100 used in the program that has been viewed so far divides the display area as shown in FIG. 19B, the processing of the operation example 2 is performed, If the LCT 30100 used in the program being viewed displays an overlay display as shown in FIG. 19C, the processing of the operation example 3 may be performed. In addition, when the LCT 30100 used in the program that has been viewed so far has an area whose region_number is 1 or later, a predetermined pattern or message may be displayed in the area. .

  In this way, by using the presentation area information of the program that has been viewed so far, at least the main asset presentation process can be performed even before the information of the LCT 30100 is read.

<Operation example 4>
Since there is a case where the channel is returned to the original channel after the channel is changed, the information of the LCT 30100 once read is stored in association with the channel information, and the stored presentation area information is used when the channel is returned. good. It should be noted that if the latest LCT 30100 is stored for all the channels that can be received by the broadcast receiving apparatus 100, the convenience related to the presentation area control when the channel is changed is improved.

  Also, since the presentation area information may be changed even during the program, if the expiration date is set in the LCT 30100 and the expiration date has passed when the channel is returned, the presentation area information is used. Instead, the default setting is used by the method shown in the operation example 2 or the operation example 3, or only the main asset is presented using the presentation area information of the program that has been viewed. Alternatively, only the main asset may be presented by using the expired presentation area information of the channel. Of course, after obtaining a new LCT 30100, the normal presentation method is restored. The control may be performed by referring to the expiration date, but may be performed by referring to version instead of the expiration date information.

  An example in which an expiration date is set in the LCT 30100 is shown in FIG. 36A. It is set in the NTP length format in the LCT expiration date descriptor (ending_time). The descriptor is arranged in the descriptor area of the LCT 30100 (FIG. 18).

  Alternatively, an expiration date may be set for each layout as shown in FIG. 36B as a layout expiration date descriptor.

  Alternatively, an expiration date may be set for each region, as shown as a presentation region expiration date descriptor in FIG. 36C.

  The expiration date may be set on a single level, or the expiration date may be set on multiple levels. When setting the expiration date in multiple layers, priority is given to the earlier expiration date for each region.

  By this method, the presentation area information acquired once can be used effectively while considering the expiration date.

<Operation example 5>
In the operation example 4, the presentation area information of the program once read is stored, but the presentation area information (common presentation area information) commonly used for a plurality of programs in the channel is prepared for each channel, and broadcasted. The common presentation area information may be acquired in advance by the receiving apparatus 100, and the common presentation area information may be used in each program.

  The common presentation area information is acquired in advance by the broadcast receiving apparatus 100 in the format of LCT (FIG. 18). In order to indicate the common presentation area information, the common presentation area descriptor shown in FIG. 37 is used. This descriptor is arranged in the descriptor area of the LCT (FIG. 18), and the layout numbers that are common presentation areas are listed together with the device numbers. service_id represents a broadcast channel. Furthermore, the start time (beginning_time) and end time (ending_time) of the effective period of the common presentation area information are described in the NTP length format. In addition, a full_set_flag is also described so that it can be confirmed that all the information is available when the information is updated. The meaning of full_set_flag is summarized in FIG.

  The common presentation area information may be read in a cycle such as once a day or once a week, for example, in a time zone outside the broadcast time. Moreover, you may acquire from a broadcast wave and you may acquire via the internet.

  In addition, since common presentation area information is not read, common presentation area information used in the program is transmitted as LCT 30100 in the program data. At this time, full_set_flag of the common presentation area descriptor indicates that the information is a part of the common presentation area information.

  By using this common presentation area information, it is possible to promptly present the asset 30003 even at the timing immediately before the LCT 30100 is acquired immediately after the broadcast receiver 100 is turned on or immediately after the program is switched.

<Operation example 6>
In the operation example 5, the method of using the common presentation area information is shown. However, even if the common presentation area information is a channel transmitted on a broadcast wave or the Internet, it is not described in the common presentation area information depending on the program. A layout presentation area may be used.

  Specifically, layout information that is not described in the common presentation area information may be described in the LCT 30100 of the program. At that time, since the layout number that is the common presentation area is described in the common presentation area descriptor (FIG. 37), the broadcast receiving apparatus 100 grasps whether or not the LCT 30100 has additional presentation area information that is not the common presentation area. Use that information in some cases. At this time, when there is an overlap between the common presentation area information and the layout number and area number of the presentation area, which information is prioritized is determined in advance. That is, depending on the broadcasting system, the broadcast receiving apparatus 100 may be configured to give priority to the common presentation area information. Further, depending on the broadcast system, the broadcast receiving apparatus 100 may be configured to give priority to the presentation area information for each program.

  Furthermore, when the common presentation area descriptor (FIG. 37) is not arranged in the LCT 30100, the presentation area information described in the LCT 30100 is treated as having been designated as not common area information.

  The additional presentation area information for each program may be acquired from the broadcast wave, but may be acquired from the Internet instead of from the broadcast wave.

  According to this method, it is possible to use the presentation area information optimized for each program while using the common presentation area information.

<Operation example 7>
Asset 30003 is presented in one presentation area, but when it is better to display on as many terminals as possible, as in the case of extraordinary news, the same content was presented on all available terminals at that time. Better.

  As a specific method, layout_number for performing the same area setting in other devices is described in the layout setting of the main device (device whose Device_id is 0) in the overlapping presentation area specification descriptor (FIG. 39). This descriptor is arranged in the descriptor area of the LCT 30100 (FIG. 18).

  FIG. 40 shows an example in which the same content screen is presented to the sub device (portable information terminal 700) in addition to the main device (broadcast receiving device 100).

  In addition, in order to return to the original program after the end of the temporary news, the presentation area information used in the original program may be stored, and the information may be used after the end of the temporary news.

  This method increases the recognition of important information with high urgency.

<Operation example 8>
The presentation area of each asset 30003 is designated by specifying layout_number (layout number) and region_number (area number) by the MPU presentation area designation descriptor (FIG. 34). If there is no presentation area information corresponding to the layout number and the area number, the presentation cannot be performed, so the asset 30003 is not presented. However, when the abnormal asset 30003 is presented in a partial area of the screen, it may not be apparent at first glance that the display is abnormal. Therefore, when an asset 30003 that cannot be presented is generated, an error display as shown in FIG. 41 is performed.

  By this method, the viewer can recognize that the display is not normally performed.

<Operation example 9>
In the operation example 8, the operation when the presentation area without the presentation area information is specified has been described. However, the operation when different assets 30003 specify the same presentation area will be described. In the case of an asset that displays some content, it cannot be displayed in the same presentation area. Therefore, the same presentation area must not be specified simultaneously for different assets 30003. If they are specified at the same time, the asset transmitted on the broadcast wave is given priority. Alternatively, the presentation of the asset 30003 that initially used the layout number and the area number is continued, and the presentation of the specified asset 30003 is prohibited later. Alternatively, presentation of all assets 30003 with overlapping area designations is prohibited. When an asset 30003 that cannot be presented is generated, an error display as shown in FIG. 41 may be performed.

  However, the same presentation area may be specified by different assets 30003, for example, when adding additional asset information to increase the gradation of a video asset. In order to indicate that a plurality of assets are in a complementary relationship that constitutes one content, the information of the dependency relationship descriptor is used. The data structure of the dependency descriptor is shown in FIG. If there is this dependency, presentation is permitted even if the same presentation area is specified.

  In order to manage the presentation area designation of the asset 30003, a management table indicating which asset 30003 designates which presentation area may be used. FIG. 43 shows an example of the management table. Since the assets 30003 with the asset IDs 1 and 3 and the asset IDs 2 and 4 have a dependency relationship, display is permitted even if the same area is specified. On the other hand, the asset 30003 with the asset ID 7 is a video asset, and since the same area as the asset ID 0 is specified without dependency, presentation is prohibited.

  Since asset 30001 with asset ID 1 is transmitted by broadcast waves, this is given priority. In addition, since the asset 30003 with the same acquisition destination asset 30003 with the asset ID 8 is prohibited from being presented, there is a high possibility that the asset 30003 has a voice paired with the asset ID7, so that the presentation is also prohibited. Further, since the assets with asset IDs 2, 4, 6, and 8 are audio assets, and the audio assets are not directly related to the presentation process in the monitor unit 162, the management in the management table is not necessarily performed. That is, only video assets may be managed by the management table.

  In this way, by controlling the presentation, it is possible to prevent an abnormal presentation from being made when the control information is inconsistent.

<Operation example 10>
The dependency relationship of the asset 30003 includes a parallel relationship in which the content is not completed unless a plurality of dependent assets 30003 are arranged, and another asset 30003 is provided with data for improving the image quality of the main asset 30003. In some cases, it may become a dependency. The main asset 30003 can be presented alone, but the subordinate asset 30003 is likely to be displayed abnormally if the subordinate asset 30003 does not exist. If this is not possible, presentation of the dependent asset 30003 is prohibited. Note that a multi-layered structure in which another asset 30003 is subordinate to the subordinate asset 30003 may be adopted.

  In order to specify the dependency relationship, it may be determined in advance whether the asset 30003 described in the dependency relationship descriptor (FIG. 42) indicates the asset 30003 that is the dependency destination or the asset 30003 that is dependent on the asset. . Note that in the case of the asset 30003 in a parallel relationship, a dependency relationship descriptor (FIG. 42) is arranged assuming that both depend on the other.

  As another method of specifying the dependency relationship, a method of clearly specifying the dependency relationship in the dependency relationship descriptor (FIG. 42) may be used. FIG. 44 shows a dependency descriptor in which the dependency relationship is specified. A parameter called dependency_type indicating a dependency type for an asset having a dependency relationship is designated. The meaning of dependency_type is shown in FIG. When 0 is subordinate to the opponent, 1 is subordinate to the opponent. If they are in a parallel relationship, they are designated as subordinate to the other asset.

  An example of a presentation permission / prohibition management table is shown in FIG. Assets with IDs 3 and 4 are subordinate to IDs 1 and 2, but presentation is permitted because assets with IDs 1 and 2 have been acquired. On the other hand, the assets of 9 and 10 are prohibited from being presented because the assets of IDs 7 and 8 which are subordinates are not acquired.

  Assets with IDs 11 and 12 are interdependent, but their presentation is permitted because they are both present. On the other hand, although the assets with IDs 13 and 14 are also interdependent, presentation of the asset with ID 13 is prohibited because the asset with ID 14 has not been acquired. If an asset 30003 that cannot be presented is generated, an error display as shown in FIG. 41 may be performed.

  In this way, by controlling the presentation while considering the dependency relationship, it is possible to prevent an abnormal presentation from being made when the control information is inconsistent.

<Operation example 11>
The broadcast receiving apparatus 100 can present both the asset 30003 acquired from the broadcast wave and the asset 30003 acquired from the communication line (Internet). Depending on the state of the communication line, the broadcast receiving apparatus 100 acquires the asset 30003 via the communication line. It is possible that the broadcast receiving apparatus 100 is not connected to the communication line in the first place. Therefore, normally, when only the broadcast video of the broadcast wave is displayed on the full screen using the default setting (FIG. 19A) and the asset 30003 via the communication line is acquired, the asset 30003 is specified in the area specified according to the setting of the LCT 30100. May be presented.

For example, the area setting of the LCT 30100 is as shown in FIG. 19B, the broadcast video is set to be presented in area 0, and the asset 30003 via the communication line is set to be presented in area 1 and area 2. The case will be explained. If only broadcast wave images can be received, the default setting (FIG. 19A) is used to display the broadcast image in full screen, and when the asset 30003 via the communication line can be acquired, the area setting of the LCT 30100 is set. In use, the broadcast video is presented in area 0 of FIG. 19B, and the asset 30003 via the communication line is presented in areas 1 and 2. In this case, the LCT 30100 may not be transmitted in the broadcast wave, but may be transmitted together with the asset 30003 via the communication line. By using the method of this operation example, display according to the actual reception status of program data is possible. If only one of the assets 30003 via the communication line has been acquired and the other is not acquired, the default setting (FIG. 19A) may be left as it is. It is desirable to perform control so as to shift to the area setting of FIG. 19B when the assets 30003 via both communication lines are prepared.
Example 4

  Hereinafter, Example 4 of the present invention will be described. Note that the configuration, effects, and the like in this example are the same as those in Examples 1 to 3 unless otherwise specified. For this reason, below, the difference between a present Example and Examples 1-3 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible. In the present embodiment, an operation example of handling presentation area information set by the layout setting table (LCT) shown in FIG. 18 and handling of non-program content will be described.

[Hardware configuration of broadcast receiver]
Since the hardware configuration of the broadcast receiving apparatus 100 is the same as that of the first embodiment, the description thereof is omitted.

[Example of deformed asset presentation]
<Operation example 1>
When the channel is changed using the electronic program guide (EPG), the new program is displayed while the EPG is displayed at the stage where the new program is selected on the EPG as shown by a broken line frame 30203 in FIG. If the LCT 30100 is acquired from the PA message 30000, the asset presentation process can be performed according to the presentation area information specified by the program when the program display state is set.

  Alternatively, the presentation area information of each program is incorporated into EPG data (in which other necessary data is stored in a storage unit such as a memory, mainly MH-EIT acquired from a broadcast wave or a communication network). In addition, the presentation area information of the program to be newly changed can be read from the EPG data, and the presentation area information of the program can be acquired earlier. In this case, since it is not necessary to use another tuner, the number of tuners can be reduced.

  Alternatively, the presentation area information of each program may be distributed via the Internet, and the process of reading the presentation area information of each program first may be performed. In this case as well, it is not necessary to use another tuner, so the number of tuners can be reduced.

  Note that a reduced program video may be displayed on the sub-screen 30204 when the EPG is displayed, but even if the sub-assets are presented in this state, it is difficult to view, so ignore the LCT setting of the program, Only the main asset may be presented on the entire child screen 30204. The LCT setting may be similarly ignored in a situation where the main asset is difficult to see due to the display of the sub-assets, not limited to the sub-screen at the time of EPG display.

<Operation example 2>
In order to support viewing from the middle of the program, the LCT 30100 is repeatedly transmitted. However, when the LCT 30100 is not transmitted for a certain period of time, including when the broadcast reception is interrupted, the presentation area setting is effective for the receiver. It is determined that the presentation area information has been lost, and the default setting (FIG. 19A) is set. When reception is resumed, if the presentation area setting is changed, abnormal presentation due to the old presentation area setting remaining can be prevented. Since the default setting is a setting that only presents the main asset, the presentation does not become abnormal regardless of the program.

<Operation example 3>
If there is inconsistency in the information of the LCT 30100 used in the program and there is no effective presentation area information, the default setting (FIG. 19A) is used to ensure the display of only the main asset.

<Operation example 4>
If there is an asset via the Internet in addition to the broadcast wave, asset data can be acquired via the Internet. However, if the reception of the broadcast wave is interrupted, the LCT 30100 may not be acquired for a certain period or a new presentation area. Until the setting is established, the presentation area setting is maintained and the presentation of assets via the Internet is continued. By this method, it is possible to continue presenting assets that can be partially presented in an abnormal situation.

<Operation example 5>
When there is an asset via the Internet in addition to the broadcast wave, reception of the broadcast wave continues, but when asset data cannot be obtained via the Internet, the presentation area setting is set to the default setting (FIG. 19A). Change to, and present only the main asset. For example, when the presentation area of assets via the Internet is area 1 and area 2 in FIG. 19B and the presentation area of the broadcast screen is area 0, when the presentation of assets via the Internet is stopped, the areas 1 and 2 Becomes the background color and becomes unsightly. In such a case, if the default setting (FIG. 19A) is used to display the entire broadcast screen (main asset), the screen can be used effectively without being unsightly.

  In the above processing, when the presentation area setting is changed to the default setting (FIG. 19A), an error message 30205 may be displayed to the effect that data acquisition from the Internet is no longer possible (FIG. 48).

[How to handle non-program content]
While watching a program, there are cases where it is desired to use content outside the program, for example, content or an application on the Internet. Processing in such a case will be described.

  First, whether to allow presentation of content outside the program while viewing the program is set by the content control descriptor. The data structure of the content control descriptor is shown in FIG. This descriptor is arranged in MPT 30001 (FIGS. 17 and 28). In FIG. 49, a parameter “contents_control_mode” (content control mode) indicates permission / non-permission of presentation of non-program content.

  FIG. 50 shows the meaning of the content control mode. In the case of mode 00, no permission is permitted, and the others indicate permission. Three types of permission modes are provided. In the case of mode 01, presentation to a specified area is permitted. The area is specified by layout_number and region_number. In the case of mode 10, presentation of content outside the program is permitted unless the presentation of program content is hidden. In mode 11, presentation of contents outside the program is permitted, and the presentation method is also arbitrary.

  FIG. 51 shows an example of mode 01. The program content is a main asset presented in the area 30206 and a sub asset presented in the area 30207. Non-program content is displayed in area 30208. Here, presentation of the web browser 30209 is shown as an example. In the example of FIG. 51, the program content presentation area and the non-program content presentation area do not overlap, but these areas may be overlapped to present the non-program content on the program content.

  FIG. 52 shows an example of mode 10. The program content 30210 and the non-program content 30209 are shown. In this case, the program content is presented as a full screen area designated by the LCT 30100 in a part of the screen 162 of the broadcast receiver. That is, the upper left position 30211 of the presentation area of the program content 30210 corresponds to the position of left_top_pos_x = 0 and left_top_pos_y = 0 in the LCT30100, and the lower right position 30212 corresponds to the right_down_pos_x = 100 and right_down_pos_position_right_pos_pos_position_pos of the LCT30100. To do. The position on the screen 162 of the broadcast receiver 100 where the entire screen area specified by the LCT is set is set in advance in the broadcast receiver 100 or set by the viewer. The non-program content may be presented at any position as long as it does not interfere with the presentation of the program content. Even if the areas do not overlap or overlap, they are presented behind the program content so that the presentation of the program content is not hidden (FIG. 53).

  An example of mode 11 is shown in FIG. In this case, the relationship between the presentation of program content and non-program content is arbitrary. The content outside the program may be presented so as to hide the presentation of the program content.

As described above, if the program content and the non-program content can be viewed at the same time, it is more convenient for the viewer.
(Example 5)

  Hereinafter, Example 5 of the present invention will be described. Note that the configuration, effects, and the like in this example are the same as those in Examples 1 to 4 unless otherwise specified. For this reason, below, the difference between a present Example and Examples 1-4 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible. In the following description, the broadcast receiving apparatus according to the present embodiment is a television receiver that supports both the MMT system and the MPEG2-TS system as the media transport system.

[Hardware configuration of broadcast receiver]
Since the hardware configuration of the broadcast receiving apparatus 800 is the same as that of the second embodiment, the description thereof is omitted.

Asset type
There are two media transport systems corresponding to assets, the MMT system and the MPEG2-TS system, which are distinguished by location_type (location type) in MMT_general_location_info (FIG. 31). The types of location types are shown in FIG.

[Synchronization control of MPEG2-TS packet]
<Operation example 1>
The synchronization control of the MMT packet is performed using a time stamp based on time information of NTP (Network Time Protocol) shown in FIG. As a hardware configuration, a clock inside the receiver synchronized with the NTP shown in FIG. 7C is used.

  On the other hand, in the MPEG2-TS system, synchronization control is performed using a time stamp based on time information called PCR (Program Clock Reference). FIG. 55 shows an MPEG2-TS protocol stack. This time system based on PCR consists of an upper 33-bit counter that operates at 90 kHz and a lower 9-bit counter that operates at 27 MHz. 300 counts in the lower 9 bits correspond to 1 count in the upper 90 kHz. The upper 33-bit counter makes a round in about 26.5 hours, and the counter returns to 0 (FIG. 57). On the other hand, the clock synchronized with NTP is composed of upper 32 bits (second unit) and lower 32 bits (part after the decimal point). Therefore, the NPT-based clock has a period of about 136 years that can be expressed, and the time expression system is completely different from the PCR system (FIG. 57).

  Therefore, a receiver that processes MPEG2-TS packets has an internal clock synchronized with PCR in addition to a clock synchronized with NTP, and presents assets according to the clock, or has a relationship between the time of PCR and NTP. Based on this, it is necessary to present assets using an NTP clock. In addition, when precise presentation synchronization is established between an MMT asset and an MPEG2-TS asset, it is desirable that the relationship between the PCR and the NTP time is known even when the internal clock synchronized with the PCR is used. .

  As a method for acquiring the relationship between the time of PCR and NTP, for example, the following method may be used. First, as a method for giving a correspondence relationship between the time of PCR and NTP on the transmission side, there is a method of describing the relationship for each MMT package table. That is, it is described as MPT_descriptor in the MPT of FIG. An example of the descriptor is shown in FIG. Here, the timestamp_offset parameter gives the difference (time stamp offset) between the time stamp by PCR and the time stamp by NTP. Here, the time based on the NPT corresponding to the time when the counter of the PCR time stamp used in the asset group indicated by the MPT is returned to 0 is shown in a 64-bit NTP time stamp format.

  Referring to FIG. 57, when A in the figure is a PCR time stamp, B in the figure is a time stamp offset. If this time stamp offset value is used, an NTP time stamp value can be obtained by adding the PCR time stamp offset value to the time stamp offset. If an NTP timestamp value is obtained, even an MPEG2-TS asset can be presented using an NTP clock, and presentation synchronization with an MMT asset can be accurately performed. it can.

  Further, a time stamp offset may be described for each asset corresponding to the MPEG2-TS system. In this case, it is described as asset_descriptor in the MPT of FIG.

  Note that if the PCR time stamp used in an asset contains more than 0, there may be multiple times when the counter value as the PCR time stamp corresponds to 0. In this case, the time stamp offset may be described with the earliest time. Referring to FIG. 57, the PCR time stamp used in the asset is A ′ in addition to A. Also in this case, the value B is used as the time stamp offset described in the descriptor. In the MPEG2-TS asset presentation process, the value of the time stamp offset described in the descriptor is used first, and as the presentation process proceeds, the PCR time stamp When the value decreases, it is determined that the counter has made a round, and the value of the time offset used for processing is a round of the time of the PCR counter, that is, a value obtained by dividing 2 33 by 90 kHz (approx. 26.5 hours) To continue processing as a new time offset value. Thereafter, if the value of the PCR time offset decreases during processing, the value of the time stamp offset may be updated in the same manner.

<Operation example 2>
Next, processing when the time stamp offset is not described on the transmission side will be described. If there is no description of the time stamp offset in the transmission data, when the PCR time stamp is received, the value of the NTP clock in the receiving device at the time of reception is read, and the PCR time stamp counter is returned to 0 in the same manner as above. The time of the NTP clock corresponding to the set time may be set as the time stamp offset value. The MPEG2-TS asset presentation process after setting the time stamp offset value may be the same as the case where the time stamp offset value is described in the descriptor described above.

  Note that, when a program is viewed at the time of broadcasting, even if the value of the time stamp offset is not described in the descriptor in the transmission data, for example, it can be acquired on the receiving device side as described above. When a program is recorded and played back and viewed, it is difficult to obtain the relationship between the NTP timestamp and the PCR timestamp value. Therefore, when recording a program in which an MMT asset and an MPEG2-TS asset are mixed, it is desirable to record a time stamp offset descriptor at the same time. When the transmission side does not describe the time stamp offset in the transmission data, it is desirable to acquire the value of the time stamp offset by the receiving device, and record / record it in addition to the reception data. These recording / recording data may be recorded in the storage unit 810 in FIG. 24, for example. When viewing, these recorded data may be reproduced from the storage unit 810 and used.

  As described above, by performing the asset presentation process using the time stamp offset that gives the relationship between the NTP time stamp and the PCR time stamp, in the program in which the MMT format asset and the MPEG2-TS format asset are mixed, Precise presentation synchronization processing is possible.

<Operation example 3>
The presentation area of assets transmitted by the MMT media transport system is specified by the MPU presentation area specification descriptor (FIG. 34), but the assets transmitted by other media transport systems, such as the MPEG2-TS system, etc. This presentation area may also be designated by the MPU presentation area designation descriptor (FIG. 34). At this time, designations that do not make sense depending on the type of asset, such as mpu_sequence_number, are ignored. Thereby, it is possible to present assets without using a special designation method, and convenience is enhanced.

  When the designation of mpu_sequence_number is ignored, the presentation area of the entire asset designated in the MP table (MPT) 30001 (FIGS. 17 and 28) is assumed to follow the area designation of the MPU presentation area designation descriptor (FIG. 34).

<Operation example 4>
The presentation time of the asset transmitted by the media transport method of the MMT method is specified by the MPU time stamp descriptor (FIG. 58), but other than the MPEG2-TS method and other media transport methods, The presentation time may also be specified by the MPU time stamp descriptor (FIG. 58). At this time, designations that do not make sense depending on the type of asset, such as mpu_sequence_number, are ignored on the receiver side. In this case, the designated time is the presentation time of the beginning of the asset, and if this time information is used, the difference between the NTP time stamp and the PCR time stamp can be obtained. And presentation synchronization of assets transmitted by the MPEG2-TS method. Thereby, it is possible to present assets without using a special designation method, and convenience is enhanced.

<Operation example 5>
In operation example 3 and operation example 4, the method of using the MPU presentation area designation descriptor (FIG. 34) and the MPU time stamp descriptor (FIG. 58) for presenting assets transmitted by a method other than the MMT method was shown. However, a dedicated descriptor may be used. As examples of dedicated descriptors, an asset presentation area designation descriptor (FIG. 59) and an asset time stamp descriptor (FIG. 60) may be used. In these descriptors, information that does not make sense other than the MMT method, such as mpu_sequence_number, is not described. This improves the certainty without disrupting the processing.

  The descriptor for transmitting a time stamp offset or the descriptor for transmitting the presentation time of an asset other than the media transport method of the MMT method described in the above operation examples 1, 3, 4, and 5 is described in the MMT package table. It is transmitted as a child. In this case, it is transmitted as data received by the tuner / demodulator 831 in FIG. 24 and decoded by the MMT decode processor 841.

  However, as a modification of this operation example, data received by the tuner / demodulator 832 and decoded by the MPEG2-TS decoding processor 842 may be transmitted.

  As described above in the fifth embodiment, the asset image transmitted in the MMT method synchronized with the synchronization process and the asset image transmitted in the MPEG2-TS method by the synchronization processing are, for example, the LCT described in the first to fourth embodiments. The video composition unit 861 in FIG. 24 may generate and output a composite video so that the screen is presented in any of the divided areas.

  As mentioned above, although the example of embodiment of this invention was demonstrated using Examples 1-5, the structure which implement | achieves the technique of this invention is not restricted to the said Example, Various modifications 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 another embodiment can be added to the configuration of one embodiment. These all belong to the category of the present invention. In addition, numerical values, messages, and the like appearing in sentences and drawings are merely examples, and the use of different ones does not impair the effects of the present invention.

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

  The software for controlling the broadcast receiving device 100 may be stored in advance in the ROM 103 and / or the storage (storage) unit 110 of the broadcast receiving device 100 at the time of product shipment. It may be acquired from another application server 500 on the Internet 200 via the LAN communication unit 121 after product shipment. Further, the software stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 124 or the like.

  In addition, the control lines and information lines shown in the figure are those that are considered necessary for the explanation, and do not necessarily indicate all the control lines and information lines on the product. Actually, it may be considered that almost all the components are connected to each other.

  DESCRIPTION OF SYMBOLS 100,800 ... Broadcast receiving apparatus, 100a ... Antenna, 101, 801 ... Main control part, 102, 802 ... System bus, 103, 803 ... ROM, 104, 804 ... RAM, 110, 810 ... Storage part, 121, 821 ... LAN communication unit, 124, 824 ... extended interface unit, 125, 825 ... digital interface unit, 131, 831, 832 ... tuner / demodulation unit, 132 ... separation unit, 141 ... video decoder, 142 ... video color gamut conversion unit, 143 ... Audio decoder, 144 ... Character super decoder, 145 ... Subtitle decoder, 146 ... Subtitle synthesis unit, 147 ... Subtitle color gamut conversion unit, 151 ... Data decoder, 152 ... Cache unit, 153 ... Application control unit, 154 ... Browser unit, 155 ... Application color gamut conversion unit, 156 ... Sound source unit, 61, 861 ... Video synthesis unit, 162, 862 ... Monitor unit, 163, 863 ... Video output unit, 164, 864 ... Audio synthesis unit, 165, 865 ... Speaker unit, 166, 866 ... Audio output unit, 170, 870 ... Operation input 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 ... broadcast station server, 400 ... service provider server, 500 ... other application server, 600 ... mobile telephone communication server, 600b ... base station, 700 ... portable information terminal.

Claims (4)

A broadcast receiving apparatus capable of receiving video data of a digital broadcast program transmitted by each of at least two media transport systems having different time systems, ie, a first media transport system and a second media transport system. And
A first receiver for receiving program video data transmitted by the first media transport method;
A second receiver for receiving program video data transmitted by the second media transport method;
The two media transports based on the different time systems using the correspondence relationship of the notation in each time system for the presentation time of the program video data in the two media transport systems based on the different time systems A video information generating unit that generates output video information by synthesizing the program video data of the system,
A display unit for displaying the output video information;
Comprising
Broadcast receiving device. The broadcast receiving device according to claim 1,
The broadcast receiving apparatus in which the correspondence relationship of the notation in each time system regarding the presentation time of the program video data in the two media transport systems is received by the first receiving unit or the second receiving unit. The broadcast receiving device according to claim 1,
The broadcast receiving device, wherein the correspondence relationship of the notation in each time system for the presentation time of the program video data in the two media transport systems is obtained by measurement processing in the broadcast receiving device. Output in a broadcast receiver capable of receiving video data of a digital broadcast program transmitted in each of the first media transport method and the second media transport method, which are at least two media transport methods having different time systems. A video information generation method,
A first receiving step of receiving video data of a digital broadcast program transmitted by the first media transport method;
A second receiving step of receiving video data of a digital broadcast program transmitted by the second media transport method;
The two media transports based on the different time systems using the correspondence relationship of the notation in each time system for the presentation time of the program video data in the two media transport systems based on the different time systems A video information generation step of generating output video information by synthesizing after presenting program video data of the system;
Comprising
Output video information generation method.

Images