Video display device

Abstract

To provide a digital broadcast receiver capable of executing functions with a higher added value.SOLUTION: A digital broadcast receiving device 100 includes: a broadcast receiving unit that receives broadcast data including encoded video data and control information of a digital broadcast program; a video decoding unit that decodes the encoded video data to reproduce program video information; a display unit that displays the program video information; a communication unit that transmits viewing permission request data to a prescribed mobile information terminal and receives response data from the mobile information terminal when a broadcast program that a user of the broadcast receiving device wishes to view is a viewing-restricted program; an authentication information storage unit that stores terminal identification information and authentication information capable of identifying the prescribed mobile information terminal; and a control unit. When the response data is a display permission response and both terminal identification information and authentication information included in the display permission response match the stored terminal identification information and authentication information, respectively, the control unit controls the video decoding unit or the display unit so as not to restrict viewing of the broadcast program.SELECTED DRAWING: Figure 8A

Description

Technical Field

[0001] The present invention relates to a video display device.

Background Art

[0002] One of the extended functions of digital broadcast services is data broadcasting that transmits digital data by broadcast waves and displays various information such as weather forecasts, news, and recommended programs. A large number of commercially available television receivers that can receive data broadcasts are already available, and a large number of technologies related to data broadcast reception, including the following Patent Document 1, have been published.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In response to environmental changes related to content distribution in recent years, television receivers are also required to have various function expansions. In particular, there are many demands for the distribution of content and cooperative applications using a broadband network environment such as the Internet, and for the high definition / high definition of video content. However, it is difficult to provide a high-value-added television receiver that can meet the above requirements by simply diverting the data broadcast reception function or the like provided in the current television receiver, or only by expanding the functions of the data broadcast reception function or the like.

[0005] An object of the present invention is to provide a video display device capable of executing more highly value-added functions.

Means for Solving the Problems

[0006] As means for solving the above problems, the technology described in the claims is used.

[0007] For example, a video display device includes a receiving unit that receives encoded video data of content, first information and second information regarding viewing restrictions of the content, a video decoding unit that decodes the encoded video data received by the receiving unit to reproduce video information of the content, a display unit that displays the video information of the content reproduced by the video decoding unit, a communication unit that transmits viewing permission request data to a predetermined portable information terminal for content subject to viewing restrictions and receives response data to the viewing permission request data from the predetermined portable information terminal, and a control unit. When the response data received by the communication unit is a display permission response, the control unit controls the video decoding unit or the display unit to reproduce and display the content desired by the user of the video display device. When the response data received by the communication unit is a display rejection response, the control unit does not reproduce and display the content desired by the user of the video display device. Further, based on the first information, the control unit determines whether the desired content is content subject to the viewing restriction. When it is determined that the content is content subject to the viewing restriction, there are a mode in which the communication unit is controlled to transmit the viewing permission request data to the predetermined portable information terminal according to the second information, and a mode in which the communication unit is controlled not to transmit the viewing permission request data to the predetermined portable information terminal. A video display device is used.

Advantages of the Invention

[0008] By using the technology of the present invention, a video display device capable of executing a function with higher added value can be provided.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2A

Figure 2B

Figure 2C

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 6A

Figure 6B

Figure 6C

Figure 6D

Figure 6E

Figure 7A

Figure 7B

Figure 7C

Figure 7D

Figure 7E

Figure 7F

Figure 8A

Figure 8B

Figure 8C

Figure 9

Figure 10

Figure 11A

Figure 11B

Figure 12A

Figure 12B

Figure 12C

Figure 12D

Figure 12E

Figure 12F

Figure 13A

Figure 13B

Figure 13C

Figure 13D

Figure 13E

Figure 14A

Figure 14B

Figure 14C

Figure 15A

Figure 15B

Figure 16A

Figure 16B

Figure 17A

Figure 17B

Figure 17C

Figure 17D

Figure 17E

Figure 17F

Figure 18A

Figure 18B

Figure 19A

Figure 19B

Figure 19C

Figure 19D

Figure 20A

Figure 20B

Figure 20C

Figure 21

Figure 22A

Figure 22B

Figure 23

Figure 24

Figure 25

Figure 26A

Figure 26B

Figure 27A

Figure 27B

Figure 28A

Figure 28B

Figure 29A

Figure 29B

Figure 29C

Figure 29D

Figure 30A

Figure 30B

Figure 30C

Figure 31A

Figure 31B

Figure 31C

Figure 31D

Figure 32

Figure 33A

Figure 33B

Mode for Carrying Out the Invention

[0010] Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings.

[0011] (Embodiment 1) [System Configuration] FIG. 1 is a system configuration diagram showing an example of a broadcast communication system including the broadcast receiving apparatus of this embodiment. The broadcast communication system of this embodiment includes a broadcast receiving apparatus 100, an antenna 100a, a broadband network such as the Internet 200 and a router device 200r, an access point 200a, a radio tower 300t of a broadcasting station, a broadcast satellite (or communication satellite) 300s, a broadcasting station server 300, a service provider server 400, other application servers 500, a mobile phone communication server 600 and a base station 600b of a mobile phone communication network, and a portable information terminal 700.

[0012] The broadcast receiving apparatus 100 receives a 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. Further, the broadcast receiving apparatus 100 can be connected to the Internet 200 via the router device 200r, and can transmit and receive data through communication with each server device and other communication devices on the Internet 200.

[0013] The router device 200r is connected to the Internet 200 by wired communication, and is connected to the broadcast receiving apparatus 100 by wired or wireless communication and to the portable information terminal 700 by wireless communication. The wireless communication may use a method such as Wi-Fi (registered trademark). Thereby, each server device and other communication devices on the Internet 200, the broadcast receiving apparatus 100, and the portable information terminal 700 can mutually transmit and receive data via the router device 200r. Note that the communication between the broadcast receiving apparatus 100 and the portable information terminal 700 may be directly performed by a method such as Bluetooth (registered trademark) or NFC (Near Field Communication) without passing through the router device 200r.

[0014] The radio tower 300t is broadcasting equipment of a broadcasting station, and transmits broadcast waves including encoded data of broadcast programs, subtitle information, other applications, general-purpose data, etc. The broadcasting satellite (or communication satellite) 300s is a repeater that receives the broadcast waves transmitted from the radio tower 300t of the broadcasting station, performs appropriate frequency conversion, etc., and then re-transmits the broadcast waves to the antenna 100a connected to the broadcast receiving device 100. Also, it is assumed that the broadcasting station is equipped with a broadcasting station server 300. The broadcasting station server 300 stores broadcast programs (such as video content) and metadata such as the program title, program ID, program summary, performer information, broadcast date and time, etc. of each broadcast program, and it is assumed that the video content and each metadata can be provided to service providers based on a contract. Note that the provision of the video content and each metadata to the service provider may be performed through an API (Application Programming Interface) provided in the broadcasting station server 300.

[0015] The service provider server 400 is a server device prepared by the service provider, and it is assumed that various services linked to the broadcast programs distributed from the broadcasting station can be provided. Also, the service provider server 400 stores, manages, and distributes the video content and metadata provided from the broadcasting station server 300, various contents and applications linked to the broadcast programs, etc. It is also assumed that it has a function of providing a search and list of available contents and applications in response to inquiries from a TV receiver or the like. Note that 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. Also, the functions of the service provider server 400 may be provided by the broadcasting station server 300.

[0016] The other application server 500 is a known server device that stores, manages, and distributes other general applications, operation programs, content, data, etc. There may be a plurality of other application servers 500 on the Internet 200.

[0017] The mobile phone communication server 600 is connected to the Internet 200 and, on the other hand, is connected to the mobile information terminal 700 via the base station 600b. The mobile phone communication server 600 manages telephone communication (call) and data transmission / reception via the mobile phone communication network of the mobile information terminal 700, and enables data transmission / reception through communication between the mobile information terminal 700 and each server device and other communication devices on the Internet 200. The communication between the base station 600b and the mobile information terminal 700 may be performed by a W-CDMA (Wideband Code Division Multiple Access) (registered trademark) system, a GSM (Global System for Mobile communications) (registered trademark) system, an LTE (Long Term Evolution) system, or other communication systems.

[0018] The mobile information terminal 700 is assumed to have functions of telephone communication (call) via a mobile phone communication network and data transmission / reception, as well as a wireless communication function such as Wi-Fi (registered trademark). The mobile information terminal 700 can be connected to the Internet 200 via a router device 200r, an access point 200a, or via a base station 600b of the mobile phone communication network and a mobile phone communication server 600, and can transmit and receive data through communication with each server device and other communication devices on the Internet 200. The access point 200a is connected to the Internet 200 by wired communication and is connected to the mobile information terminal 700 by wireless communication. The wireless communication may use a method such as Wi-Fi (registered trademark). Note that the communication between the mobile information terminal 700 and the broadcast receiving device 100 may be performed via the access point 200a, the Internet 200, and the router device 200r, or via the base station 600b, the mobile phone communication server 600, the Internet 200, and the router device 200r.

[0019] [Overview of MMT Method] The broadcast receiving device 100 shown in FIG. 1 is assumed to be a television receiver capable of supporting MMT (MPEG Media Transport) in place of the TS (Transport Stream) defined in the MPEG (Moving Picture Experts Group)-2 system (hereinafter described as MPEG2-TS), which is widely adopted in conventional digital broadcast systems, as a media transport method for transmitting data such as video and audio. A television receiver capable of supporting both MPEG2-TS and MMT may also be used.

[0020] MPEG2-TS is characterized by multiplexing components such as video and audio that make up a program, together with control signals and a clock, into one stream. Since it is treated as one stream including the clock, it is suitable for transmitting one content over one transmission path with ensured transmission quality and has been adopted in many conventional digital broadcast systems. On the other hand, due to the limitations of the functions of MPEG2-TS in the face of environmental changes related to content distribution in recent years, such as the diversification of content, the diversification of devices using content, the diversification of transmission paths for distributing content, and the diversification of content storage environments, etc., the newly formulated media transport method is MMT.

[0021] Figure 2A shows an example of the outline of the encoded signal in the MMT of this embodiment. As shown in the figure, the MMT of this embodiment is assumed to have, as elements constituting the encoded signal, an MFU (Media Fragment Unit), an MPU (Media Processing Unit), an MMTP (MMT Protocol) payload, and an MMTP packet.

[0022] MFU is a format during the transmission of video, audio, etc., and may be composed of NAL (Network Abstraction Layer) unit units or access unit units. An MPU shall include one or more access units and be capable of performing video and audio decoding processing on its own. An MPU may be composed of MPU metadata including information on the overall configuration of the MPU, movie fragment metadata including information on the encoded media data, and sample data which is the encoded media data. There may be multiple movie fragment data and sample data in one MPU. Also, it is assumed that an MFU can be extracted from the sample data. Fig. 2B shows an example of the configuration of an MPU. Note that by adding a sequence number to each MPU belonging to the same asset, any MPU can be distinguished from other MPUs by the asset ID for identifying the asset and the sequence number of the MPU. Also, in the case of media such as video components and audio components, presentation times and decoding times may be specified in units of MPU or access unit.

[0023] The MMTP packet is composed of a header part and an MMTP payload, and is assumed to transmit the control information of the MFU and MMT. The MMTP payload shall be provided with a payload header according to the content (data unit) stored in the payload part. Fig. 2C shows an example of an overview from a video / audio signal to forming an MFU, further storing it in the MMTP payload, and forming an MMTP packet. Note that for a video signal encoded using inter-frame prediction, it is desirable to configure the MPU in units of GOP (Group Of Pictures). Also, when the size of the MFU to be transmitted is small, one MFU may be stored in one payload part, or a plurality of the same type of MFUs may be stored in one payload part. Also, when the size of the MFU to be transmitted is large, one MFU may be divided and stored in a plurality of payload parts. Further, the MMTP packet may be protected using techniques such as AL-FEC (Application Layer Forward Error Correction) and ARQ (Automatic Repeat Request) in order to recover packet loss on the transmission path.

[0024] In the broadcast system of this embodiment, MPEG-H HEVC (High Efficiency Video Coding) is used as the video coding method, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless Coding) is used as the audio coding method. The encoded data such as the video and audio of the broadcast program encoded by each of the above methods shall be in the form of MFU or MPU, and further mounted on the MMTP payload and packetized into MMTP packets for transmission by IP (Internet Protocol) packets. Also, regarding the data content related to the broadcast program, it may be in the form of MFU or MPU, further mounted on the MMTP payload and packetized into MMTP packets for transmission by IP packets. As the data content transmission method, four types are prepared: (1) the subtitle / character super transmission method used for streaming data synchronized with the broadcast, (2) the application transmission method used for the data transmission service asynchronous with the broadcast, (3) the event message transmission method used for synchronous / asynchronous message notifications for applications operating on the television receiver from the broadcast station, and (4) the general-purpose data transmission method for transmitting other general-purpose data in a synchronous / asynchronous manner.

[0025] For the 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. Also, in the broadcast transmission path, the TLV (Type Length Value) multiplexing method is used for efficient transmission of IP packets. An example of the protocol stack of the broadcast system of this embodiment is shown in FIG. 3. In the figure, (A) is an example of the protocol stack in the broadcast transmission path, and (B) is an example of the protocol stack in the communication line.

[0026] In the broadcast system of this embodiment, a mechanism for transmitting two types of control information, namely MMT-SI (MMT-Signaling Information) and TLV-SI (TLV-Signaling Information), shall be provided. MMT-SI is control information indicating the composition of a broadcast program, etc. It shall be in the form of an MMT control message, carried in the MMTP payload, packetized into an MMTP packet, and transmitted as an IP packet. TLV-SI is control information regarding the multiplexing of IP packets, and shall provide information for channel selection and the correspondence information between IP addresses and services.

[0027] Also, in a broadcast system using MMT, time information shall be transmitted to provide the absolute time. Note that while MPEG2-TS indicates the display time of components based on different clocks for each TS, in MMT, the display time of components shall be indicated based on Coordinated Universal Time (UTC). With these mechanisms, terminal devices can synchronously display components transmitted from different transmission points via different transmission paths. To provide UTC, IP packets in the NTP (Network Time Protocol) format shall be used.

[0028] [Control Information of Broadcast System Using MMT] In the broadcast system compatible with the broadcast receiver 100 of the present embodiment, as described above, as control information, TLV-SI related to the TLV multiplexing method for multiplexing IP packets and MMT-SI related to MMT which is a media transport method are prepared. TLV-SI provides information for the broadcast receiver 100 to demultiplex the IP packets multiplexed on the broadcast transmission path. TLV-SI is composed of a "table" and a "descriptor". The "table" is transmitted in section format, and the "descriptor" is arranged within the "table". MMT-SI is transmission control information indicating information related to the configuration of MMT packages and broadcast services. MMT-SI is composed of three layers: a "message" storing a "table" and a "descriptor", a "table" having elements and attributes indicating specific information, and a "descriptor" indicating more detailed information. An example of the hierarchical configuration of the control information used in the broadcast system of the present embodiment is shown in FIG. 4.

[0029] FIG. 5A shows a list of "tables" used in TLV-SI of the broadcast system compatible with the broadcast receiver 100 of the present embodiment. In the present embodiment, the following are used as the "tables" of TLV-SI.

[0030] (1) TLV-NIT The 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.

[0031] (2) AMT The Address Map Table (AMT) provides a list of multicast groups of IP packets constituting each service transmitted in the network.

[0032] (3) Table set by the operator In addition, it is possible to prepare a table independently set by a service provider or the like.

[0033] <Descriptors used in TLV-SI> Fig. 5B shows a list of "descriptors" arranged in the TLV-SI of the broadcast system corresponding to the broadcast receiver 100 of this embodiment. In this embodiment, the following are used as the "descriptors" of TLV-SI.

[0034] (1) Service list descriptor The service list descriptor provides a list of services based on service identification and service format type.

[0035] (2) Satellite distribution system descriptor The satellite distribution system descriptor indicates the physical conditions of the satellite transmission path.

[0036] (3) System management descriptor The system management descriptor is used to distinguish between broadcast and non-broadcast.

[0037] (4) Network name descriptor The network name descriptor describes the network name with alphanumeric characters.

[0038] (5) Remote control key descriptor The remote control key descriptor is used to set the service assigned to the one-touch channel selection button of the receiver remote control.

[0039] (6) Descriptor set by the operator In addition, it is possible to prepare descriptors independently set by a service provider or the like.

[0040] <Messages used in MMT-SI> Fig. 6A shows a list of "messages" used in the MMT-SI of the broadcast system corresponding to the broadcast receiver 100 of this embodiment. In this embodiment, the following are used as the "messages" of MMT-SI.

[0041] (1) PA message The Package Access (PA) message is used to transmit various tables.

[0042] (2) M2 section message The M2 section message is used to transmit the section extension format of MPEG-2 Systems.

[0043] (3) CA message The CA message is used to transmit a table for identifying the restricted reception method.

[0044] (4) M2 short section message The M2 short section message is used to transmit the short section format of MPEG-2 Systems.

[0045] (5) Data transmission message The data transmission message is a message that stores a table related to data transmission.

[0046] (6) Messages set by the operator In addition, it is possible to prepare messages independently set by service providers and the like.

[0047] <Tables used in MMT-SI> Figure 6B shows a list of the 'tables' used in the MMT-SI of the broadcast system corresponding to the broadcast receiving apparatus 100 of this embodiment. The table is control information having elements and attributes indicating specific information, and is stored in a message and transmitted in an MMTP packet. Note that the message storing the table may be determined according to the table. In this embodiment, the following are used as the 'tables' of MMT-SI.

[0048] (1) MPT The MMT Package Table (MPT) provides information that constitutes a package, such as a list of assets and the location of the assets on the network. The MPT may be stored in a PA message.

[0049] (2)PLT The Package List Table (PLT) shows a list of IP data flows for transmitting PA messages of MMT packages provided as broadcast services, packet IDs, and IP data flows for transmitting IP services. The PLT may be stored in a PA message.

[0050] (3)LCT The Layout Configuration Table (LCT) is used to associate layout information for presentation with layout numbers. The LCT may be stored in a PA message.

[0051] (4)ECM Entitlement Control Message (ECM) is common information consisting of program information and control information, and delivers key information for decrypting scrambling, etc. The ECM may be stored in an M2 section message.

[0052] (5)EMM Entitlement Management Message (EMM) transmits individual information including contract information for each subscriber and key information for decrypting the ECM (common information), etc. The EMM may be stored in an M2 section message.

[0053] (6)CAT(MH) The Conditional Access Table (CAT) (MH) is used to store descriptors for identifying the restricted reception method. The CAT (MH) may be stored in a CA message.

[0054] (7)DCM The Download Control Message (DCM) transmits key-related information including a key for decrypting the transmission path cipher for downloading. The DCM may be stored in the M2 section message.

[0055] (8)DMM The Download Management Message (DMM) transmits key-related information including a download key for decrypting the DCM. The DMM may be stored in the M2 section message.

[0056] (9)MH-EIT The 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.

[0057] (10)MH-AIT The MH-Application Information Table (MH-AIT) stores all information regarding the application and the startup state required for the application, etc. The MH-AIT may be stored in the M2 section message.

[0058] (11)MH-BIT The MH-Broadcaster Information Table (MH-BIT) is used to present information on broadcasters existing on the network. The MH-BIT may be stored in the M2 section message.

[0059] (12)MH-SDTT The MH-Software Download Trigger Table (MH-SDTT) is used for download notification information. The MH-SDTT may be stored in the M2 section message.

[0060] (13) MH-SDT The MH-Service Description Table (MH-SDT) has sub-tables representing services included in a specific TLV stream, and transmits information regarding the programmed channel, such as the name of the programmed channel and the name of the broadcaster. The MH-SDT may be stored in an M2 section message.

[0061] (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 an M2 short section message.

[0062] (15) MH-CDT The MH-Common Data Table (MH-CDT) is used to transmit common data to be stored in non-volatile memory in section format for all receivers that receive it. The MH-CDT may be stored in an M2 section message.

[0063] (16) DDM Table The Data Directory Management Table (DDM Table) provides the directory configuration of the files that make up an application in order to separate the file configuration of the application and the configuration for file transmission. The DDM Table may be stored in a data transmission message.

[0064] (17) DAM Table The Data Asset Management Table (DAM Table) provides the configuration of the MPUs within an asset and the version information for each MPU. The DAM Table may be stored in a data transmission message.

[0065] (18) DCC Table The Data Content Configuration Table (DCC Table) provides configuration information of files as data content in order to achieve flexible and effective cache control. The DCC Table may be stored in a data transmission message.

[0066] (19) EMT The Event Message Table (EMT) is used to transmit information related to event messages. The EMT may be stored in the M2 section message.

[0067] (20) Tables set by the operator In addition, it is possible to prepare tables independently set by service providers and the like.

[0068] <Descriptors used in MMT-SI> Figures 6C, 6D, and 6E show a list of "descriptors" arranged in the MMT-SI of the broadcast system corresponding to the broadcast receiving apparatus 100 of the present embodiment. The descriptor is control information that provides more detailed information and is assumed to be 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, the following are used as the "descriptors" of MMT-SI.

[0069] (1) Asset group descriptor The asset group descriptor provides the group relationship of assets and the priority within the group. The asset group descriptor may be arranged in the MPT.

[0070] (2) Event package descriptor The event package descriptor provides the correspondence between events representing programs and packages. The event package descriptor may be arranged in the MH-EIT transmitted in the M2 section message.

[0071] (3) Background color specification descriptor The background color descriptor provides the background color at the very back in layout specification. The background color descriptor may be placed in the LCT.

[0072] (4) MPU Presentation Area Descriptor The MPU presentation area descriptor provides the position where the MPU is presented. The MPU presentation area descriptor may be placed in the MPT.

[0073] (5) MPU Timestamp Descriptor The MPU timestamp descriptor indicates the presentation time of the first access unit in the presentation order in the MPU. The MPU timestamp descriptor may be placed in the MPT.

[0074] (6) Dependency Descriptor The dependency descriptor provides the asset ID of the asset in a dependency relationship. The dependency descriptor may be placed in the MPT.

[0075] (7) Access Control Descriptor The access control descriptor provides information for identifying the restricted reception method. The access control descriptor may be placed in the MPT or CAT (MH).

[0076] (8) Scrambling Method Descriptor The scrambling method descriptor provides information for identifying the encryption target and the type of encryption algorithm during scrambling. The scrambling method descriptor may be placed in the MPT or CAT (MH).

[0077] (9) Message Authentication Method Descriptor The message authentication method descriptor provides information for identifying the message authentication method when performing message authentication. The message authentication method descriptor may be placed in the MPT or CAT (MH).

[0078] (10) Emergency Information Descriptor (MH) The emergency information descriptor (MH) is used when performing an emergency warning broadcast. The emergency information descriptor (MH) may be placed in the MPT.

[0079] (11) MH-MPEG-4 Audio Descriptor The MH-MPEG-4 Audio Descriptor is used to describe the basic information for specifying the encoding parameters of an audio stream in ISO / IEC 14496-3 (MPEG-4 Audio). The MH-MPEG-4 Audio Descriptor may be placed in the MPT.

[0080] (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 placed in the MPT.

[0081] (13) MH-HEVC Video Descriptor The MH-HEVC Video Descriptor is used to describe the basic encoding parameters of a video stream (HEVC stream) in ITU-T Recommendation H.265|ISO / IEC 23008-2. The MH-HEVC Video Descriptor may be placed in the MPT.

[0082] (14) MH-Link Descriptor The MH-Link Descriptor identifies the services provided when additional information related to a specific one described in the program arrangement information system is requested by the viewer. The MH-Link Descriptor may be placed in the MPT, MH-EIT, MH-SDT, etc.

[0083] (15) MH-Event Group Descriptor The MH-Event Group Descriptor is used to indicate that a group of events are grouped when there is a relationship between multiple events. The MH-Event Group Descriptor may be placed in the MH-EIT.

[0084] (16) MH-Service List Descriptor The MH-Service List Descriptor provides a list of services by service identification and service format type. The MH-Service List Descriptor may be placed in the MH-BIT.

[0085] (17) MH-Short Form Event Descriptor The MH-Short Form Event Descriptor represents the event name and a short description of that event in text form. The MH-Short Form Event Descriptor may be placed in the MH-EIT.

[0086] (18) MH-Extended Form Event Descriptor The MH-Extended Form Event Descriptor is used in addition to the MH-Short Form Event Descriptor to provide a detailed description of the event. The MH-Extended Form Event Descriptor may be placed in the MH-EIT.

[0087] (19) Video Component Descriptor The Video Component Descriptor indicates parameters and descriptions related to the video component and is also used to represent the elementary stream in character form. The Video Component Descriptor may be placed in the MPT or the MH-EIT.

[0088] (20) MH-Stream Identification Descriptor The MH-Stream Identification Descriptor labels the component streams of a service and is used to be able to refer to the description content indicated by the Video Component Descriptor in the MH-EIT. The MH-Stream Identification Descriptor may be placed in the MPT.

[0089] (21) MH-Content Descriptor The MH-Content Descriptor indicates the genre of an event. The MH-Content Descriptor may be placed in the MH-EIT.

[0090] (22) MH-Parental Rate Descriptor The MH-Parental Rating Descriptor represents age-based viewing restrictions and is used for extension based on other restrictions. The MH-Parental Rating Descriptor may be placed in the MPT or MH-EIT.

[0091] (23) MH-Audio Component Descriptor The MH-Audio Component Descriptor indicates the parameters of each audio elementary stream and is also used to represent the elementary stream in character form. The MH-Audio Component Descriptor may be placed in the MPT or MH-EIT.

[0092] (24) MH-Target Area Descriptor The MH-Target Area Descriptor is used to describe the area targeted by a program or a part of the stream that constitutes the program. The MH-Target Area Descriptor may be placed in the MPT.

[0093] (25) MH-Series Descriptor The MH-Series Descriptor is used to identify a series of programs. The MH-Series Descriptor may be placed in the MH-EIT.

[0094] (26) MH-SI Transmission Parameter Descriptor The MH-SI Transmission Parameter Descriptor is used to indicate the transmission parameters of the SI. The MH-SI Transmission Parameter Descriptor may be placed in the MH-BIT.

[0095] (27) MH-Broadcaster Name Descriptor The MH-Broadcaster Name Descriptor describes the name of the broadcaster. The MH-Broadcaster Name Descriptor may be placed in the MH-BIT.

[0096] (28) MH-Service Descriptor The MH-Service Descriptor represents the programmed channel name and its operator name together with the service type in character code. The MH-Service Descriptor may be placed in the MH-SDT.

[0097] (29) IP Data Flow Descriptor The IP Data Flow Descriptor provides information on the IP data flows that make up the service. The IP Data Flow Descriptor may be placed in the MH-SDT.

[0098] (30) MH-CA Startup Descriptor The MH-CA Startup Descriptor describes the startup information for starting a CAS program on the CAS platform. The MH-CA Startup Descriptor may be placed in the MPT or CAT(CA).

[0099] (31) MH-Type Descriptor The MH-Type Descriptor indicates the type of file transmitted by the application transmission method. The MH-Type Descriptor may be placed in the DAM table.

[0100] (32) MH-Info Descriptor The MH-Info Descriptor describes information about the MPU or item. The MH-Info Descriptor may be placed in the DAM table.

[0101] (33) MH-Expire Descriptor The MH-Expire Descriptor describes the expiration date of the item. The MH-Expire Descriptor may be placed in the DAM table.

[0102] (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.

[0103] (35) MH-Data Encoding Method Descriptor The MH-Data Encoding Method Descriptor is used to identify the data encoding method. The MH-Data Encoding Method Descriptor may be placed in the MPT.

[0104] (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 placed in the EMT.

[0105] (37) Event Message Descriptor The event message descriptor conveys information about event messages in general. The event message descriptor may be placed in the EMT.

[0106] (38) MH-Local Time Offset Descriptor The MH-local time offset descriptor is used when, during daylight saving time implementation, a certain offset value is given to the actual time (e.g., UTC +9 hours) and the display time for the human system. The MH-local time offset descriptor may be placed in the MH-TOT.

[0107] (39) MH-Component Group Descriptor The MH-component group descriptor defines and identifies the combination of components within an event. The MH-component group descriptor may be placed in the MH-EIT.

[0108] (40) MH-Logo Transmission Descriptor The MH-logo transmission descriptor is used to describe, for example, a simple logo string or a pointer to a logo in CDT format. The MH-logo transmission descriptor may be placed in the MH-SDT.

[0109] (41) MPU Extended Timestamp Descriptor The MPU extended timestamp descriptor provides the decoding time of the access unit within the MPU. The MPU extended timestamp descriptor may be placed in the MPT.

[0110] (42) MPU Download Content Descriptor The MPU download content descriptor is used to describe the attribute information of the content downloaded using the MPU. The MPU download content descriptor may be arranged in the MH-SDTT.

[0111] (43) MH-Network Download Content Descriptor The MH-network download content descriptor is used to describe the attribute information of the content downloaded using the network. The MH-network download content descriptor may be arranged in the MH-SDTT.

[0112] (44) MH-Application Descriptor The MH-application descriptor describes the information of the application. The MH-application descriptor may be arranged in the MH-AIT.

[0113] (45) MH-Transmission Protocol Descriptor The MH-transmission protocol descriptor is used to specify the transmission protocol such as broadcasting or communication and to indicate the location information of the application depending on the transmission protocol. The MH-transmission protocol descriptor may be arranged in the MH-AIT.

[0114] (46) MH-Simple Application Location Descriptor The MH-simple application location descriptor is described to indicate the details of the acquisition destination of the application. The MH-simple application location descriptor may be arranged in the MH-AIT.

[0115] (47) MH-Application Boundary Permission Setting Descriptor The MH-application boundary permission setting descriptor is described to set the application boundary and to set the permission for accessing the broadcast resource for each area (URL). The MH-application boundary permission setting descriptor may be arranged in the MH-AIT.

[0116] (48) MH-Startup Priority Information Descriptor The MH-Startup Priority Descriptor is described to specify the startup priority of an application. The MH-Startup Priority Descriptor may be placed in the MH-AIT.

[0117] (49) MH-Cache Information Descriptor The MH-Cache Information Descriptor is described for use in cache control when caching and holding the resources that make up an application when the reuse of the application is assumed. The MH-Cache Information Descriptor may be placed in the MH-AIT.

[0118] (50) MH-Probabilistic Application Delay Descriptor The MH-Probabilistic Application Delay Descriptor is described to delay the timing of application control by a delay amount set probabilistically, assuming load distribution of server access for application acquisition. The MH-Probabilistic Application Delay Descriptor may be placed in the MH-AIT.

[0119] (51) Linked PU Descriptor The Linked PU Descriptor describes other presentation units (PUs) that may be transitioned from the present presentation unit. The Linked PU Descriptor may be placed in the DCC table.

[0120] (52) Lock Cache Specification Descriptor The Lock Cache Specification Descriptor describes the specification of the file to be cached and locked in the present presentation unit. The Lock Cache Specification Descriptor may be placed in the DCC table.

[0121] (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 present presentation unit. The Unlock Cache Specification Descriptor may be placed in the DCC table.

[0122] (54) MH - Download Protection Descriptor The MH - Download Protection Descriptor describes the location information and transmission information of MMTP packets that transmit DCM and DMM. The MH - Download Protection Descriptor may be arranged in MPT or MH - SDTT.

[0123] (55) Application Service Descriptor The Application Service Descriptor describes the entry information of applications related to the service, etc. The Application Service Descriptor may be arranged in MPT.

[0124] (56) MPU Node Descriptor The MPU Node Descriptor indicates that the MPU corresponds to the directory node defined in the data directory management table. The MPU Node Descriptor may be arranged in the DAM table.

[0125] (57) PU Configuration Descriptor The PU Configuration Descriptor shows a list of MPUs that make up the presentation unit as mapping information between the presentation unit and the transmission unit. The PU Configuration Descriptor may be arranged in the DCC table.

[0126] (58) MH - Hierarchical Encoding Descriptor The MH - Hierarchical Encoding Descriptor describes information for identifying hierarchically encoded video stream components. The MH - Hierarchical Encoding Descriptor may be arranged in MPT.

[0127] (59) Content Copy Control Descriptor The Content Copy Control Descriptor indicates information for controlling the copy generation in digital recording devices for the entire service, and is used when digital recording is assumed, for the broadcasting station (copyright holder side) to convey copy - related information or the maximum transmission rate to the digital recording device. The Content Copy Control Descriptor may be arranged in MPT, MH - EIT, MH - SDT, etc.

[0128] (60) Content usage control descriptor The content usage control descriptor is used to indicate information regarding copy control and remote viewing control when the program is stored in a hard disk or the like, or when a video / audio signal is output from a receiver. The content usage control descriptor may be arranged in MPT, MH-EIT, MH-SDT, etc.

[0129] (61) Descriptor set by an operator In addition, it is possible to prepare descriptors independently set by service providers or the like.

[0130] <Relationship between data transmission and each control information in the MMT system> Here, with reference to FIG. 7A, the relationship between each component such as video and audio transmitted by the broadcast system corresponding to the broadcast receiver 100 of this embodiment and representative tables of MMT-SI will be described. In the MMT system, a component is defined as an asset, and hereinafter, a component may be referred to as an asset in some cases.

[0131] In the broadcast system corresponding to the broadcast receiver 100 of this 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 TLV-SI such as TLV-NIT and AMT, and an IP data flow which is a data flow of IP packets. The IP data flow includes a video asset including a series of video MPUs and an audio asset including a series of audio MPUs. Similarly, the IP data flow may include 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.

[0132] These various assets are associated with a "package" through the description of the MPT (MMT package table) stored in the PA message and transmitted. Specifically, the association can be made by describing in the MPT a package ID that identifies the package and an asset ID that identifies each asset included in the package. An example of the data structure of the MPT is shown in FIG. 7B. In the figure, the 'MMT_package_id_byte' parameter corresponds to the package ID, and the 'asset_id_byte' parameter corresponds to the asset ID.

[0133] The assets constituting the package can be only the assets in the TLV stream, but as shown in FIG. 7A, assets transmitted in the IP data flow of the communication line can also be included. This can be realized by describing the location information of the assets in the MPT together with the asset ID that identifies each asset included in the package, so that the broadcast receiving apparatus 100 of the present embodiment can grasp the reference destination of each asset. The location information is specified by 'MMT_general_location_info()' in the data structure of the MPT shown in FIG. 7B. An example of the data structure of the location information is shown in FIG. 7C.

[0134] Note that depending on the value of the 'location_type' parameter of the location information, (1) Data multiplexed in the same IP data flow as the MPT (location_type = 0x00) (2) Data multiplexed in the IPv4 data flow (location_type = 0x01) (3) Data multiplexed in the IPv6 data flow (location_type = 0x02) (4) Data multiplexed in the broadcast MPEG2-TS (location_type = 0x03) (5) Data multiplexed in the MPEG2-TS format within the IP data flow (location_type=0x04) (6) The data at the specified URL (location_type=0x05) The broadcast receiving apparatus 100 can be configured to be able to refer to various types of data transmitted through various transmission paths, such as the above.

[0135] Among the above-mentioned reference destinations, (1) is, for example, the IP data flow included in the TLV stream of the digital broadcast signal received by the broadcast receiving apparatus 100 of the present embodiment via the antenna 100a. However, when MPT is also included in the IP data flow on the communication line side for transmission, the reference destination of (1) may be the IP data flow received via the communication line. Further, the above (2), (3), (5), and (6) are the IP data flows received by the broadcast receiving apparatus 100 of the present embodiment via the communication line. Further, the above (4) is, for example, in the case of a broadcast receiving apparatus having both a receiving function for receiving a digital broadcast signal using the MMT method and a receiving function for receiving a digital broadcast signal using the MPEG2-TS method, such as the broadcast receiving apparatus 800 of Embodiment 2 described later. It can be used when referring to the data multiplexed in the MPEG2-TS received by the receiving function for receiving the digital broadcast signal using the MPEG2-TS method based on the location information of the MPT included in the digital broadcast signal using the MMT method.

[0136] In addition, for media such as video components and audio components, the presentation time and decode time can be specified in MPU units or access unit units. Information on the presentation time and decode time is described in the MPT as an MPU timestamp descriptor or an MPU extended timestamp descriptor. FIG. 7D shows an example of a data structure of an MPU timestamp descriptor describing information on the presentation time. Presentation time information of each MPU is specified by the "mpu_presentation_time" parameter of the MPU timestamp descriptor. The MPU to be specified can be identified by the "mpu_sequence_number" parameter. In the broadcast receiving device 100 of this embodiment, the presentation time information can be used to present (display, output, etc.) multiple MPUs specified by the MPT in conjunction with each other based on a clock based on NTP, which is time information in UTC notation. Information on the decode time is also described by an MPU extended timestamp descriptor, but detailed description will be omitted. Note that the presentation control of various data using the clock based on the NTP will be described later.

[0137] In the broadcast system of this embodiment, a series of data in the unit of the "package" corresponds to the "service" of digital broadcasting. Further, the "service" is a continuity of "programs" transmitted according to a schedule. The "program" is treated as an "event" in the MMT system. Each event is specified with a start time and a duration by MH-EIT. Also, the ID of the MMT package corresponding to each event is specified by an event package descriptor arranged in MH-EIT. FIG. 7E shows an example of the data structure of MH-EIT. The start time is specified by the "start_time" parameter in the figure, and the duration is specified by the "duration" parameter. FIG. 7F shows an example of the data structure of the event package descriptor. The correspondence between each event and the MMT package can be specified by the "MMT_package_id_byte" parameter of the event package descriptor arranged in MH-EIT. MH-EIT can be used in various processes in the broadcast receiving apparatus 100 of this embodiment in units of the "event" (for example, generation process of an electronic program guide, control of recording reservation and viewing reservation, copyright management processes such as temporary storage, etc.).

[0138] [Hardware Configuration of Broadcast Receiver] FIG. 8A is a block diagram showing an example of the internal configuration of the broadcast receiving apparatus 100. The broadcast receiving apparatus 100 includes a main control unit 101, a system bus 102, a ROM 103, a RAM 104, a storage (accumulation) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 125, a tuner / demodulation unit 131, 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, a subtitle 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, a video synthesis unit 161, a monitor unit 162, a video output unit 163, an audio synthesis unit 164, a speaker unit 165, an audio output unit 166, and an operation input unit 170.

[0139] The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving apparatus 100 according to a predetermined operation program. The system bus 102 is a data communication path for performing data transmission and reception between the main control unit 101 and each operation block in the broadcast receiving apparatus 100.

[0140] The ROM (Read Only Memory) 103 is a non-volatile memory in which basic operation programs such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM (Electrically Erasable Programmable ROM) or a flash ROM is used. Operation setting values necessary for the operation of the broadcast receiving apparatus 100 may be stored in the ROM 103. The RAM (Random Access Memory) 104 serves as a work area when executing basic operation programs and other operation programs. The ROM 103 and the RAM 104 may be integrally configured with the main control unit 101. Further, the ROM 103 may not be configured independently as shown in FIG. 8A, and a partial storage area in the storage unit 110 may be used.

[0141] The storage unit 110 stores the operation program and operation setting values of the broadcast receiving apparatus 100, personal information of the user of the broadcast receiving apparatus 100, and the like. Further, it can store operation programs downloaded via the Internet 200 and various data created by the operation programs. It can also store contents such as videos, still images, and audio obtained from a broadcast wave or downloaded via the Internet 200. A partial area of the storage unit 110 may replace all or part of the functions of the ROM 103. Further, the storage unit 110 needs to retain the stored information even when no external power is supplied to the broadcast receiving apparatus 100. Therefore, for example, devices such as non-volatile semiconductor element memories such as flash ROMs and SSDs (Solid State Drives), and magnetic disk drives such as HDDs (Hard Disc Drives) are used.

[0142] Note that each of the operation programs stored in the ROM 103 and the storage (accumulation) unit 110 can be added, updated, and functionally extended by a download process from each server device on the Internet 200.

[0143] The 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 to acquire an MMT data sequence (or a part thereof) of a program transmitted via a communication line. The connection to the router device 200r may be a wired connection or a wireless connection such as Wi-Fi (registered trademark). The LAN communication unit 121 is assumed to include an encoding circuit, a decoding circuit, and the like. Further, 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.

[0144] The tuner / demodulation unit 131 receives a broadcast wave transmitted from the radio tower 300t via the antenna 100a, and tunes (selects a channel) to a channel of a service desired by the user based on the control of the main control unit 101. Further, the tuner / demodulation unit 131 demodulates the received broadcast signal to acquire an MMT data sequence. In the example shown in FIG. 8A, a configuration in which there is one tuner / demodulation unit is illustrated, but the broadcast receiving apparatus 100 may be configured to include a plurality of tuner / demodulation units for the purpose of simultaneous display of a plurality of screens, recording of a back program, and the like.

[0145] The separation unit 132 is an MMT decoder, and based on the control signals in the input MMT data sequence, it distributes real-time presentation elements such as video data sequences, audio data sequences, character super data sequences, subtitle data sequences, etc. to a video decoder 141, an audio decoder 143, a character super decoder 144, a subtitle decoder 145, etc., respectively. The data input to the separation unit 132 may be an MMT data sequence transmitted via a broadcast transmission line and demodulated by the tuner / demodulation unit 131, or an MMT data sequence transmitted via a communication line and received by the LAN communication unit 121. Also, the separation unit 132 plays multimedia applications and file system data which are components thereof, and temporarily stores them in the cache unit 152. Further, the separation unit 132 extracts general-purpose data and outputs it to the data decoder 151 for use in streaming data for data or applications used by a player that presents data other than video, audio, and subtitles. Also, the separation unit 132 may perform control such as error correction and access restriction control on the input MMT data sequence based on the control of the main control unit 101.

[0146] 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 necessary for video composition processing in the video composition unit 161. The audio decoder 143 decodes the audio data sequence input from the separation unit 132 and outputs audio information. Also, streaming data in, for example, the MPEG-DASH (MPEG-Dynamic Adaptive Streaming over HTTP) format, etc., acquired from the Internet 200 via the LAN communication unit 121 may be input to the video decoder 141 and the audio decoder 143. Also, a plurality of the video decoder 141, the video color gamut conversion unit 142, the audio decoder 143, etc. may be provided to decode a plurality of types of video data sequences and audio data sequences simultaneously.

[0147] The character super decoder 144 decodes the character super data string input from the separation unit 132 and outputs character super information. The subtitle decoder 145 decodes the subtitle data string input from the separation unit 132 and outputs subtitle information. The character super information output from the character super decoder 144 and the subtitle information output from the subtitle decoder 145 are subjected to a synthesis process in the subtitle synthesis unit 146, and further, in the subtitle color gamut conversion unit 147, a color space conversion process is performed as necessary for the video synthesis process in the video synthesis unit 161. In this embodiment, among the services centered on character information presented simultaneously with the video of the broadcast program, those related to the content of the video are called subtitles, and the others are called character supers. Also, when not distinguishing between them, they are collectively referred to as subtitles.

[0148] The browser unit 154 presents the multimedia application file obtained 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 thereof in accordance with the instructions of the application control unit 153 that interprets the control information included in the MMT data string and the control information obtained from the server device on the Internet 200 via the LAN communication unit 121. Note that the multimedia application file may be an HTML (Hyper Text Markup Language) document, a BML (Broadcast Markup Language) document, or the like. The application information output from the browser unit 154 is further subjected to a color space conversion process as necessary for the video synthesis process in the video synthesis unit 161 in the application color gamut conversion unit 155. Also, the browser unit 154 is assumed to reproduce the application audio information by acting on the sound source unit 156.

[0149] The video composition unit 161 receives the video information output from the video color gamut conversion unit 142, the caption information output from the caption color gamut conversion unit 147, the application information output from the application color gamut conversion unit 155, etc., and performs processes such as appropriate selection and / or overlay. The video composition unit 161 includes a video RAM (not shown), and the monitor unit 162, etc. is driven based on the video information, etc. input to the video RAM. Also, based on the control of the main control unit 101, the video composition unit 161 performs, as necessary, processes such as scaling processing and overlay processing of EPG (Electronic Program Guide) screen information created based on information such as MH-EIT included in MMT-SI. The monitor unit 162 is a display device such as a liquid crystal panel, for example, and provides the video information subjected to selection and / or overlay processing 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 subjected to selection and / or overlay processing by the video composition unit 161.

[0150] Note that the presentation function of the broadcast receiving apparatus 100 of the present embodiment shall have a logical plane structure in order to display the multimedia service as intended by the provider. FIG. 8B 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 character supers is arranged at the forefront, and a subtitle plane for displaying subtitles is arranged in the next layer. In the third layer, a multimedia plane for displaying broadcast video, multimedia applications, or a composite video thereof is arranged, and a background plane is arranged at the rearmost. In the subtitle synthesizing unit 146 and the video synthesizing unit 161, drawing of character super information on the character super plane, drawing of subtitle information on the subtitle plane, and drawing of video information, application information, etc. on the multimedia plane are performed. Further, the background color is drawn on the background plane based on LCT or the like included in MMT-SI. Note that it is assumed 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 etc. output from the application color gamut conversion unit 155 is output only to the forefront multimedia plane.

[0151] The voice synthesizing unit 164 inputs the voice information output from the voice decoder 143 and the application voice information reproduced by the sound source unit 156, and performs processes such as appropriate selection and / or mixing. The speaker unit 165 provides the voice information subjected to selection and / or mixing processing by the voice synthesizing unit 164 to the user of the broadcast receiving apparatus 100. The voice output unit 166 is a voice output interface that outputs the voice information subjected to selection and / or mixing processing by the voice synthesizing unit 164.

[0152] The extended interface unit 124 is a group of interfaces for extending the functions of the broadcast receiving apparatus 100. In this embodiment, it is assumed to be composed of an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. The analog video / audio interface performs input of analog video signals / audio signals from an external video / audio output device, output of analog video signals / audio signals to an external video / audio input device, and the like. The USB interface connects to a PC or the like to perform data transmission and reception. An HDD may be connected to record broadcast programs and content. Also, a keyboard and other USB devices may be connected. The memory interface connects a memory card and other memory media to perform data transmission and reception.

[0153] The digital interface unit 125 is an interface for outputting or inputting encoded digital video data and / or digital audio data. The digital interface unit 125 shall be capable of directly outputting the MMT data sequence obtained by demodulation by the tuner / demodulation unit 131, the MMT data sequence acquired via the LAN communication unit 121, or the mixed data of the respective MMT data sequences. Also, it may be controlled to input the MMT data sequence input from the digital interface unit 125 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.

[0154] The digital interface unit 125 may be a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, etc., and data may be output or input in a format compliant with the DVI specification, the HDMI specification, the Display Port specification, etc. It may also be output or input in the form of serial data compliant with the IEEE1394 specification, etc. 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 their hardware configuration.

[0155] The operation input unit 170 is an instruction input unit that inputs operation instructions to the broadcast receiving apparatus 100. In this embodiment, it is assumed to be composed of a remote control receiving unit that receives commands transmitted from a remote control (not shown in the figure) and operation keys arranged with button switches. Only one of them may be used. Further, the operation input unit 170 may be replaced with a touch panel disposed over the monitor unit 162. It may also be replaced with a keyboard or the like connected to the extension interface unit 124. The remote control (not shown in the figure) may be replaced with a portable information terminal 700 having a remote control command transmission function.

[0156] Note that, 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 of the present invention. Further, the broadcast receiving apparatus 100 may be, in addition to a television receiver, an optical disk drive recorder such as a DVD (Digital Versatile Disc) recorder, a magnetic disk drive recorder such as an HDD recorder, an STB (Set Top Box), or the like. It may also be a PC (Personal Computer), a tablet terminal, a navigation device, a game machine, or the like having a digital broadcast receiving function and a broadcast communication cooperation function. When the broadcast receiving apparatus 100 is a DVD recorder, an HDD recorder, an STB, or the like, the monitor unit 162 and the speaker unit 165 may not be provided. By connecting an external monitor and an external speaker to the video output unit 163 and the audio output unit 166 or the digital interface unit 125, the same operation as that of the broadcast receiving apparatus 100 of the present embodiment becomes possible.

[0157] [Software Configuration of Broadcast Receiving Apparatus] FIG. 8C is a software configuration diagram of the broadcast receiving apparatus 100 of the present embodiment, showing the software configuration in the ROM 103, the RAM 104, and the storage (accumulation) unit 110. In the present embodiment, a basic operation program 1001 and other operation programs are stored in the ROM 103, and a receiver function program 1002, a cooperation function program 1003, a recording / playback function program 1004, and other operation programs are stored in the storage (accumulation) unit 110. Further, the storage (accumulation) unit 110 is assumed to include a content storage area 1200 for storing contents such as moving images, still images, and audio, an authentication information storage area 1300 for storing authentication information and the like necessary when accessing an external portable terminal device or each server device, and various information storage areas for storing other various information.

[0158] The basic operation program 1001 stored in the ROM 103 is expanded into the RAM 104, and further, the main control unit 101 executes the expanded basic operation program 1001 to constitute the basic operation execution unit 1101. Also, the reception function program 1002, the cooperation function program 1003, and the recording / reproducing function program 1004 stored in the storage (accumulation) unit 110 are similarly expanded into the RAM 104, and further, the main control unit 101 executes the expanded reception function program 1002, cooperation function program 1003, and recording / reproducing function program 1004 to constitute the reception function execution unit 1102, the cooperation function execution unit 1103, and the recording / reproducing function execution unit 1104. Also, the RAM 104 shall be provided with a temporary storage area for temporarily holding the data created when each operation program is executed, as necessary.

[0159] In the following, for the sake of simplicity of explanation, the process of controlling each operation block by expanding and executing the basic operation program 1001 stored in the ROM 103 by the main control unit 101 into the RAM 104 will be described as if the basic operation execution unit 1101 controls each operation block. Similar descriptions will be made for other operation programs.

[0160] 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 the present embodiment. In particular, the transport processing unit 1102a mainly controls the MMT decoder function of the separation unit 132, and distributes video data sequences, audio data sequences, etc. 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, etc. The application processing unit 1102c mainly controls the cache unit 152, the application control unit 153, the browser unit 154, and the sound source unit 156. The character super processing unit 1102d mainly controls the character super decoder 144. The subtitle processing unit 1102e mainly controls the subtitle decoder 145. The general-purpose data processing unit 1102f mainly controls the data decoder 151. The EPG generation unit 1102g interprets the description content such as MH-EIT included in the MMT-SI and generates an EPG screen. The presentation processing unit 1102h mainly controls the video color gamut conversion unit 142, the subtitle composition unit 146, the subtitle color gamut conversion unit 147, the application color gamut conversion unit 155, the video composition unit 161, and the audio composition unit 164 based on the logical plane structure.

[0161] In addition, the cooperation function execution unit 1103 manages device authentication and connection, transmission and reception of each data, etc. when the broadcast receiving apparatus 100 performs a cooperation operation with an external device such as the portable information terminal 700. The recording / reproducing function execution unit 1104 controls when recording a broadcast program obtained from the digital broadcast wave of the present broadcast system, content obtained from each server device on the network, etc. in the content storage area 1200 of the storage (accumulation) unit 110, an external storage connected to the expansion interface unit 124, etc., or when reproducing the broadcast program, the content, etc.

[0162] Each of the above operation programs may be stored in advance in the ROM 103 and / or the storage (accumulation) unit 110 at the time of product shipment. After product shipment, it may be acquired from other application servers 500 on the Internet 200 via the LAN communication unit 121. Also, each of the operation programs stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 124 or the like.

[0163] [Configuration of Broadcast Station Server] FIG. 9 is a block diagram showing an example of the internal configuration of the broadcast station server 300. The broadcast station server 300 includes a main control unit 301, a system bus 302, a RAM 304, a storage unit 310, a LAN communication unit 321, and a digital broadcast signal transmission unit 360.

[0164] The main control unit 301 is a microprocessor unit that controls the entire broadcast station server 300 according to a predetermined operation program. The system bus 302 is a data communication path for performing data transmission and reception between the main control unit 301 and each operation block in the broadcast station server 300. The RAM 304 serves as a work area when each operation program is executed.

[0165] The storage unit 310 stores a basic operation program 3001, a broadcast content management / delivery 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 contents of each broadcast program broadcast by the broadcast station. The metadata storage area 3300 stores metadata such as the program title, program ID, program summary, performers, broadcast date and time, and copy control information related to each program content of the above-mentioned broadcast programs.

[0166] Also, the basic operation program 3001, the broadcast content management / delivery program 3002, and the broadcast content transmission program 3003 stored in the storage unit 310 are each expanded in the RAM 304, and further, by the main control unit 301 executing each of the expanded programs, a basic operation execution unit 3101, a broadcast content management / delivery execution unit 3102, and a broadcast content transmission execution unit 3103 are configured.

[0167] Note that hereinafter, for simplicity of explanation, the process of the main control unit 301 expanding and executing the basic operation program 3001 stored in the storage unit 310 in the RAM 304 to control each operation block will be described as the basic operation execution unit 3101 controlling each operation block. The same description will be made for other operation programs.

[0168] The broadcast content management / delivery execution unit 3102 manages the program content and other metadata of each broadcast program and each metadata accumulated in the broadcast content storage area 3200 and the metadata storage area 3300, and controls the provision of the program content and other metadata of each broadcast program to the service provider based on the contract. Further, when providing the program content and other metadata of each broadcast program to the service provider, the broadcast content management / delivery execution unit 3102 may perform authentication processing and the like on the service provider server 400 based on the contract as necessary.

[0169] The broadcast content transmission execution unit 3103 performs time schedule management and the like when sending out an MMT data sequence including the program content of the broadcast program stored in the broadcast content storage area 3200, the program title of the broadcast program stored in the metadata storage area 3300, the program ID, the copy control information of the program content, etc. from the radio tower 300t via the digital broadcast signal transmission unit 360.

[0170] The LAN communication unit 321 is connected to the Internet 200 and communicates with service provider servers 400 etc. on the Internet 200. Assume that the LAN communication unit 321 includes an encoding circuit, a decoding circuit, etc. The digital broadcast signal transmission unit 360 modulates an MMT data sequence composed of video data sequences, audio data sequences, program information data sequences, etc. of each broadcast program stored in the broadcast content storage area 3200, and transmits it as a digital broadcast wave via the radio tower 300t.

[0171] [Configuration of Service Provider Server] FIG. 10 is a block diagram showing an example of the internal configuration of the service provider server 400. The service provider server 400 is composed of a main control unit 401, a system bus 402, a RAM 404, and a storage unit 410, and a LAN communication unit 421.

[0172] The main control unit 401 is a microprocessor unit that controls the entire service provider server 400 according to a predetermined operation program. The system bus 402 is a data communication path for performing data transmission and reception between the main control unit 401 and each operation block in the service provider server 400. The RAM 404 serves as a work area when each operation program is executed.

[0173] The storage unit 410 stores the basic operation program 4001, the video content management / delivery program 4002, and the application management / distribution program 4004, and further includes a video content storage area 4200, a metadata storage area 4300, an application storage area 4400, and a user information storage area 4500. The video content storage area 4200 stores the program content of the broadcast program provided from the broadcast station server 300 as video content. In addition, it stores video content etc. produced by the service provider. The metadata storage area 4300 stores each metadata provided from the broadcast station server 300 and metadata etc. related to the video content produced by the service provider. The application storage area 4400 stores various applications etc. for realizing services linked to the broadcast program for distribution in response to requests from each television receiver. The user information storage area 4500 stores information (personal information, authentication information, etc.) related to users whose access to the service provider server 400 is permitted.

[0174] Also, the basic operation program 4001, the video content management / delivery program 4002, and the application management / distribution program 4004 stored in the storage unit 410 are each expanded in the RAM 404, and further, the main control unit 401 executes the expanded basic operation program, the video content management / delivery program, and the application management / distribution program, thereby constituting a basic operation execution unit 4101, a video content management / delivery execution unit 4102, and an application management / distribution execution unit 4104.

[0175] In the following, for the sake of simplicity of explanation, the process in which the main control unit 401 expands and executes the basic operation program 4001 stored in the storage unit 410 in the RAM 404 to control each operation block is described as being performed by the basic operation execution unit 4101 for controlling each operation block. The same description is made for other operation programs.

[0176] The video content management / delivery execution unit 4102 acquires program content and the like and metadata of a broadcast program from the broadcast station server 300, manages the video content and the like and each metadata stored in the video content storage area 4200 and the metadata storage area 4300, and controls the delivery of the video content and the like and each metadata to each television receiver. Further, when delivering the video content and the like and each metadata to each television receiver, the video content management / delivery execution unit 4102 may perform authentication processing and the like of each television receiver as necessary. Also, the application management / distribution execution unit 4104 manages each application stored in the application storage area 4400 and controls the distribution of each application in response to requests from each television receiver. Further, when distributing each application to each television receiver, the application management / distribution execution unit 4104 may perform authentication processing and the like of each television receiver as necessary.

[0177] The LAN communication unit 421 is connected to the Internet 200 and communicates with the broadcast station server 300 on the Internet 200 and the broadcast receiving device 100 via the router device 200r. The LAN communication unit 421 is assumed to include an encoding circuit, a decoding circuit, and the like.

[0178] [Hardware Configuration of Mobile Information Terminal] FIG. 11A is a block diagram showing an example of the internal configuration of the mobile information terminal 700. The mobile 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.

[0179] The main control unit 701 is a microprocessor unit that controls the entire mobile information terminal 700 according to a predetermined operation program. The system bus 702 is a data communication path for performing data transmission and reception between the main control unit 701 and each operation block in the mobile information terminal 700.

[0180] The ROM 703 is a memory that stores basic operation programs such as an operating system and other operation programs, and a rewritable ROM such as an EEPROM or a flash ROM is used, for example. The RAM 704 serves as a work area when executing basic operation programs and other operation programs. The ROM 703 and the RAM 704 may be integrally configured with the main control unit 701. Further, the ROM 703 may use a partial storage area within the storage unit 710 instead of having an independent configuration as shown in FIG. 11A.

[0181] The storage unit 710 stores operation programs and operation setting values of the portable information terminal 700, personal information of the user of the portable information terminal 700, and the like. Also, it can store operation programs downloaded via the Internet 200 and various data created by the operation programs. Further, it can store contents such as videos, still images, and voices downloaded via the Internet 200. A partial area of the storage unit 710 may replace all or part of the functions of the ROM 703. Also, the storage unit 710 needs to retain the stored information even when no external power is supplied to the portable information terminal 700. Therefore, devices such as non-volatile semiconductor element memories such as flash ROMs and SSDs, and magnetic disk drives such as HDDs are used.

[0182] Note that the respective operation programs stored in the ROM 703 and the storage unit 710 shall be capable of being added, updated, and functionally expanded by download processing from each server device on the Internet 200.

[0183] The communication processing unit 720 is composed of a LAN communication unit 721, a mobile phone network communication unit 722, and an NFC communication unit 723. The LAN communication unit 721 is connected to the Internet 200 via a router device 200r or an access point 200a, and transmits and receives data with each server device and other communication devices on the Internet 200. The connection with the router device 200r or the access point 200a is assumed to be made by wireless connection such as Wi-Fi (registered trademark). The mobile phone network communication unit 722 performs telephone communication (call) and data transmission and reception by wireless communication with a base station 600b of a mobile phone communication network. The NFC communication unit 723 performs wireless communication when in proximity to a corresponding reader / writer. The LAN communication unit 721, the mobile phone network communication unit 722, and the NFC communication unit 723 are each assumed to be provided with an encoding circuit, a decoding circuit, an antenna, and the like. Further, the communication processing unit 720 may further include other communication units such as a Bluetooth (registered trademark) communication unit and an infrared communication unit.

[0184] The extended interface unit 724 is a group of interfaces for expanding the functions of the mobile information terminal 700. In this embodiment, it is assumed to be composed of a video / audio interface, a USB interface, a memory interface, and the like. The video / audio interface performs input of video signals / audio signals from an external video / audio output device, output of video signals / audio signals to an external video / audio input device, and the like. The USB interface is connected to a PC or the like to transmit and receive data. Further, a keyboard or other USB devices may be connected. The memory interface connects a memory card or other memory media to transmit and receive data.

[0185] The operation unit 730 is an instruction input unit for inputting operation instructions to the portable information terminal 700. In this embodiment, it is assumed to be composed of a touch panel 730t arranged overlapping the display unit 741 and operation keys 730k arranged with button switches. Only one of them may be used. The operation of the portable information terminal 700 may also be performed using a keyboard or the like connected to the expansion interface unit 724. The operation of the portable information terminal 700 may also be performed using a separate terminal device connected by wired communication or wireless communication. That is, the operation of the portable information terminal 700 may be performed from the broadcast receiving device 100. Further, the touch panel function may be provided by the display unit 741 itself.

[0186] The image processing unit 740 is composed of 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, and provides the image data processed by the image signal processing unit 742 to the user of the portable information terminal 700. The image signal processing unit 742 includes a video RAM (not shown), and the display unit 741 is driven based on the image data input to the video RAM. Further, the image signal processing unit 742 is assumed to have a function of performing format conversion, superimposing a menu and other OSD (On Screen Display) signals as necessary. The first image input unit 743 and the second image input unit 744 are camera units that input image data of the surroundings or an object by converting the light input from a lens into an electrical signal using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor.

[0187] The audio processing unit 750 is composed of an audio output unit 751, an audio signal processing unit 752, and an audio input unit 753. The audio output unit 751 is a speaker, and provides the audio signal processed by the audio signal processing unit 752 to the user of the portable information terminal 700. The audio input unit 753 is a microphone, and converts the user's voice or the like into audio data and inputs it.

[0188] The sensor unit 760 is a group of sensors for detecting the state of the portable information terminal 700. In this embodiment, it is composed of a GPS receiver 761, a gyro sensor 762, a geomagnetic sensor 763, an acceleration sensor 764, an illuminance sensor 765, and a proximity sensor 766. With these sensor groups, it becomes possible to detect the position, inclination, direction, movement, ambient brightness, proximity status of surrounding objects, etc. of the portable information terminal 700. Also, the portable information terminal 700 may further include other sensors such as a barometric pressure sensor.

[0189] The portable information terminal 700 may be a mobile phone, a smartphone, a tablet terminal, etc. It may also be a PDA (Personal Digital Assistants) or a notebook PC. Further, it may be a digital still camera, a video camera capable of video shooting, a portable game machine, a navigation device, etc., or other portable digital devices.

[0190] Note that the configuration example of the portable information terminal 700 shown in FIG. 11A includes many configurations that are not essential to this embodiment, such as the sensor unit 760, etc., but even a configuration without these does not impair the effects of this embodiment. Also, configurations not shown, such as a digital broadcast reception function and an electronic money settlement function, may be further added.

[0191] [Software Configuration of Portable Information Terminal] FIG. 11B is a software configuration diagram of the portable information terminal 700 of this embodiment, showing the 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. Also, the storage unit 710 is assumed to include a content storage area 7200 for storing contents such as videos, still images, and voices, an authentication information storage area 7300 for storing authentication information and the like necessary when accessing a television receiver and each server device, and various information storage areas for storing other various information.

[0192] The basic operation program 7001 stored in the ROM 703 is expanded into the RAM 704, and further, the main control unit 701 executes the expanded basic operation program, thereby constituting the basic operation execution unit 7101. Also, the cooperation control program 7002 stored in the storage unit 710 is similarly expanded into the RAM 704, and further, the main control unit 701 executes the expanded cooperation control program, thereby constituting the cooperation control execution unit 7102. Also, the RAM 704 is provided with a temporary storage area for temporarily holding data created when each operation program is executed, as needed.

[0193] In the following, for the sake of simplicity, the process of the main control unit 701 expanding and executing the basic operation program 7001 stored in the ROM 703 in the RAM 704 to control each operation block will be described as if the basic operation execution unit 7101 controls each operation block. The same description will be made for other operation programs.

[0194] The cooperation control execution unit 7102 manages device authentication and connection, transmission and reception of each data, etc. when the mobile information terminal 700 performs a cooperation operation with the television receiver. Also, the cooperation control execution unit 7102 is provided with a browser engine function for executing an application that interlocks with the television receiver.

[0195] Each of the operation programs may be stored in the ROM 703 and / or the storage unit 710 in advance at the time of product shipment. After product shipment, it may be acquired from other application servers 500 on the Internet 200 etc. via the LAN communication unit 721 or the mobile phone network communication unit 722. Also, each of the operation programs stored in a memory card, an optical disk, etc. may be acquired via the expansion interface unit 724 etc.

[0196] [Time Management of Broadcast Receiver] The broadcast receiver 100 of this embodiment has two types of time management functions. The first time management function is a time management function based on NTP, and the second time management function is a time management function based on MH-TOT. Hereinafter, the two types of time management functions will be described.

[0197] <Time management function based on NTP> First, the time management function based on NTP will be described.

[0198] FIG. 12A is an example of a system configuration for clock synchronization / presentation synchronization in a broadcast system to which the broadcast receiver 100 of this embodiment corresponds. In the broadcast system of this embodiment, UTC is transmitted from a broadcast transmission system to a receiver (such as the broadcast receiver 100 of this embodiment) in the form of a 64-bit NTP timestamp. In the NTP timestamp format, the "seconds or more" of UTC is represented by 32 bits, and the "less than seconds" is represented by 32 bits. However, in reality, it is difficult to reproduce 1 second with 32-bit accuracy. Therefore, as a system clock for synchronizing the video system or for operating a system clock for an NTP-formatted clock, for example, a frequency of "2 to the 24th power" Hz (about 16.8 MHz) as shown in the figure may be used. Considering that the system clock in the conventional broadcast system was 27 MHz and that the hardware configuration of the receiver can be easily constructed, it is desirable to adopt a power-of-two frequency of about "2 to the 24th power" to "2 to the 28th power" as the system clock.

[0199] In addition, when the system clock is set to a frequency of a power of 2 between approximately "2 to the 24th power" and "2 to the 28th power" as described above on the broadcast transmission system side or the receiver side, the lower 8 to 4 bits that are not referenced by the PLL (Phase Locked Loop) system for reproducing the system clock and the NTP-formatted clock in the NTP timestamp format transmitted from the broadcast transmission system side to the receiver side may be fixed to '0' or '1'. That is, if the system clock is "2 to the nth power" Hz (n = 24 in the example of FIG. 12A, the same applies hereinafter), the lower '32 - n' bits of the NTP timestamp format may be fixed to '0' or '1'. Alternatively, on the receiver side, the lower '32 - n' bits of the NTP timestamp format may be processed to be ignored.

[0200] On the broadcast transmission system side, when obtaining NTP-formatted time information from the outside, a PLL system is configured with a 32 + n-bit counter using a VCO (Voltage Controlled Oscillator) of "2 to the nth power" Hz, and a transmission system clock synchronized with the time information given from the outside is realized. Also, the entire signal processing system is operated in synchronization with the system clock of "2 to the nth power" Hz. Further, the output of the transmission system clock is periodically transmitted to the receiver side via the broadcast transmission path as NTP long-formatted time information. Note that, for the NTP long-formatted time information transmitted to the receiver side, among the 32 bits representing "less than a second", the lower '32 - n' bits may be fixed to '0' or '1'. That is, because the system clock counter on the broadcast transmission system side is composed of 32 + n bits.

[0201] On the receiver side, NTP long-formatted time information is received via the broadcast transmission path, and similar to the broadcast transmission system side, the reception system clock is reproduced by a PLL system based on a VCO of "2 to the nth power" Hz. As a result, the reception system clock becomes a clock synchronized with the broadcast transmission system side. Also, by operating the signal processing system of the receiver in synchronization with the system clock of "2 to the nth power" Hz, clock synchronization between the broadcast transmission system side and the receiver side is realized, and stable signal reproduction becomes possible.

[0202] Also, the decoding time and 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. The decoding time is specified by an MPU extended timestamp descriptor (not shown) stored in the MPT. Also, the presentation time is specified by an MPU timestamp descriptor (see FIG. 7D) stored in the MPT. The parameter'mpu_sequence_number (MPU sequence number)' in the MPU timestamp descriptor indicates the sequence number of the MPU that describes the timestamp, and the parameter'mpu_presentation_time (MPU presentation time)' indicates the presentation time of the MPU in the 64-bit NTP timestamp format. That is, the receiver can control the presentation (display, output, etc.) timing for each MPU of the video / audio signal, subtitles, character super, etc. by referring to the MPU timestamp descriptor stored in the MPT.

[0203] Note that when focusing on the control of the decoding timing and presentation timing for each presentation unit of the above-mentioned video / audio signal, etc., synchronization of the video / audio signal can be ensured 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, etc. That is, when using a clock of '2 to the mth power' Hz generated by frequency division of the system clock or the like for the control of the decoding timing and presentation timing, it is not necessary to refer to the lower '32 - m' bits of the NTP timestamp format described in the MPU timestamp descriptor, etc. Therefore, the lower '32 - m' bits of the NTP timestamp format described in the MPU timestamp descriptor, etc. may be fixed to '0' or '1'.

[0204] <Time management function based on MH - TOT> An example of the configuration of time information transmitted in the NTP format in the NTP-based time management function described above is shown in FIG. 12B. The “reference_timestamp” parameter, “transmit_timestamp” parameter, etc. in the NTP format are time data in the 64-bit NTP long format, and the “mpu_presentation_time” parameter in the MPU timestamp descriptor shown in FIG. 7D is also time data in the 64-bit NTP timestamp format. The time data in the NTP long format and the time data in the NTP timestamp format are data representing “seconds or more” of UTC in 32 bits and “less than seconds” in 32 bits. That is, the time information in the NTP format can transmit time information up to “less than seconds”. Further, since the time information in the NTP format is in UTC notation, unlike the time management in conventional digital broadcasting, as shown in FIG. 3, both the data flow transmitted via the broadcast transmission path and the data flow distributed via the communication line are managed by the time information in the NTP format, so that the consistency of the two data can be easily achieved.

[0205] On the other hand, the time information transmitted by MH-TOT is as follows.

[0206] FIG. 12C shows an example of the data structure of MH-TOT. The broadcast receiving apparatus 100 of the present embodiment can acquire the current date and current time from the 'JST_time' parameter of the MH-TOT. As shown in FIG. 12D, the 'JST_time' parameter includes the lower 16 bits of the encoded data of the current date in Modified Julian Date (MJD) and 24-bit information representing Japan Standard Time (JST) in six 4-bit Binary-Coded Decimal (BCD). By performing a predetermined operation on the 16-bit encoded data of the MJD, the current date can be calculated. Also, the six 4-bit Binary-Coded Decimals represent 'hour' in two decimal digits by the first two 4-bit Binary-Coded Decimals,'minute' in two decimal digits by the next two 4-bit Binary-Coded Decimals, and'second' in two decimal digits by the last two 4-bit Binary-Coded Decimals.

[0207] That is, the difference between the time management based on the NTP format and the time management based on MH-TOT is that the former time management based on the NTP format can transmit time information up to 'less than seconds' as described above, while the latter time management based on MH-TOT can transmit only time information up to'seconds' in JST notation.

[0208] The broadcast receiving apparatus 100 of the present embodiment uses the time management function based on NTP, which is time information in UTC notation, for the synchronization processing of decoding and displaying video, audio, subtitles, text super, and other presentation data that are the content of the broadcast signal, thereby realizing more accurate synchronization processing. Further, by referring to the information in UTC notation instead of the clock notation of the broadcast station, it is also possible to perform synchronization processing of decoding and displaying video, audio, subtitles, text super, or other data received in the broadcast signal and video, audio, subtitles, text super, or other data acquired via the communication line path.

[0209] Furthermore, in the broadcast receiver 100 of this embodiment, the time management function based on "JST_time" including 24-bit information represented by six 4-bit binary-coded decimal numbers of MH-TOT may be used for the process of presenting the current time to the user or for each process dealing with MH-EIT shown in Fig. 7E. Generally, in the process of presenting the current time to the user in a broadcast receiver, there is almost no requirement for accuracy down to less than a second. Also, each time information described in MH-EIT is, like the EIT of conventional digital broadcasts transmitted in the MPEG2-TS format, 24-bit information represented by six 4-bit binary-coded decimal numbers, and is stored in "hours", "minutes", and "seconds" in two decimal digits each. For this reason, the time management function based on MH-TOT in the broadcast receiver 100 of this embodiment is easily compatible with each process dealing with MH-EIT. Specifically, each process dealing with MH-EIT is, for example, the process of generating an electronic program guide, the control of recording reservations and viewing reservations, copyright management processes such as temporary storage, etc. In any of these processes, it is rare that accuracy down to less than a second is required, because accuracy in units of one second is sufficient.

[0210] Also, the process of generating the electronic program guide, the control of recording reservations and viewing reservations, copyright management processes such as temporary storage, etc. are functions that are also installed in receivers of conventional digital broadcast systems using the MPEG2-TS format. Then, in the broadcast system of this embodiment as well, in the processes such as the process of generating the electronic program guide, the control of recording reservations and viewing reservations, copyright management processes such as temporary storage, etc., if it is configured to be able to handle with a time management process that is compatible with the conventional MPEG2-TS format digital broadcast system, when configuring a broadcast receiver having both the receiving function of the conventional MPEG2-TS format digital broadcast and the receiving function of the MMT format digital broadcast, in these processes (the process of generating the electronic program guide, the control of recording reservations and viewing reservations, copyright management processes such as temporary storage, etc.), there is no need to separately design the processing algorithms, and the cost can be reduced.

[0211] Moreover, even in the case of a receiver that does not have the receiving function of the conventional MPEG2-TS digital broadcast but only has the receiving function of the MMT digital broadcast, without completely newly creating the algorithms for processes such as the generation process of the electronic program guide, the control of recording reservation and viewing reservation, and the copyright management process such as temporary storage, the algorithms of the functions mounted on the receiver of the conventional MPEG2-TS digital broadcast system can be reused, so that it can be developed at a lower cost.

[0212] Therefore, by adopting a configuration in which the time management function based on the 'JST_time' parameter of MH-TOT is used for these processes (processes such as the generation process of the electronic program guide, the control of recording reservation and viewing reservation, and the copyright management process such as temporary storage), even in the broadcast receiving apparatus of the MMT digital broadcast, by enhancing the compatibility with the conventional broadcast system, it is possible to provide it at a lower cost.

[0213] As described above, the broadcast receiving apparatus 100 of the present embodiment has a time management function using two types of time information with different accuracies. That is, the first time information is time information with a notation that is compatible with the conventional digital broadcast system, and the second time information is time information with a higher resolution than the first time information. By using the second time information for the synchronization process of each content data of the broadcast signal, a more advanced information presentation process is realized, and by using the first time information for processes such as the generation process of the electronic program guide, the control of recording reservation and viewing reservation, and the copyright management process such as temporary storage, the broadcast receiving apparatus can be provided at a low cost.

[0214] Therefore, in the broadcast receiving apparatus 100 of the present embodiment, by having the two types of time management functions described above, it is possible to achieve both the realization of a more advanced information presentation process and cost reduction.

[0215] [First Modification Example of Time Management] Next, the first modification example of time management in the broadcast system of the present embodiment will be described below.

[0216] In the first modification example, in order to improve the accuracy of the management time of the NTP-based time management function already described with reference to FIG. 12A, information regarding the assumed delay time in the time information transmission from a time management server (not shown) or a broadcasting station server 300 to the broadcast receiving apparatus 100 is included in the broadcast signal and transmitted. The broadcast receiving apparatus 100 may be configured to use the information regarding the assumed delay time for correcting the system clock of the NTP-based time management function.

[0217] At this time, the information regarding the assumed delay time may be configured to be transmitted not within the TLV multiplexing stream of the protocol stack in the broadcast transmission path shown in FIG. 3(A), but within the TMCC (Transmission and Multiplexing Configuration Control) area outside the TLV multiplexing stream. If it is transmitted within the TMCC area, in the broadcast receiving apparatus 100, it becomes possible to extract the information regarding the assumed delay time without going through the separation process (demultiplexing process) of the TLV multiplexing stream. That is, it is possible to acquire information that is less affected by the delay due to the separation process in the broadcast receiving apparatus 100. Therefore, it is possible to perform a correction process for a highly accurate system clock. An example of the data structure of the time information transmitted by the TMCC signal will be described with reference to FIG. 12E. The time information may be stored and transmitted in, for example, the TMCC extended information area. In the time information of the TMCC extended information area shown in the figure, the 'delta' parameter represents the assumed value of the transmission delay from the time management server that distributes UTC or the server apparatus that creates the TMCC signal to a general broadcast receiving apparatus in a 32-bit signed fixed-point decimal. The upper 16 bits describe the integer part, and the lower 16 bits describe the decimal part. The 'transmit_timestamp' parameter is a transmission timestamp, and describes the time when this TMCC signal is sent from the server apparatus in the NTP timestamp length format. The upper 32 bits represent the integer part, and the lower 32 bits represent the decimal part.

[0218] In the first modification example, the broadcast receiving apparatus 100 of the present embodiment can correct the system clock of the time management function based on NTP used for synchronization processing of each content data of the broadcast signal with higher accuracy by using the information regarding the assumed delay time (for example, the aforementioned 'delta' parameter and / or 'transmit_timestamp' parameter) described in the time information stored and transmitted in the TMCC extended information area.

[0219] [Second Modification Example of Time Management] Next, a second modification example of time management in the broadcast system of the present embodiment will be described below.

[0220] As described above, the broadcast receiving apparatus 100 of the present embodiment has a time management function for acquiring the current date and the Japan Standard Time based on the information transmitted by MH-TOT and managing the time. The current date and the Japan Standard Time acquired based on the information transmitted by MH-TOT can be output to the monitor unit 162 and the video output unit 163 and provided to the user by being superimposed on video information, application information, etc. in the video composition unit 161 of the broadcast receiving apparatus 100. As described above, MH-TOT has the data structure shown in FIG. 12C, and the broadcast receiving apparatus 100 can acquire the current date and the current time from the 'JST_time' parameter of the MH-TOT.

[0221] However, in the aforementioned 'JST_time' parameter, only the lower 16 bits of the encoded data of MJD are used, so an overflow will occur after 'April 22, 2038', and the date after 'April 23, 2038' cannot be expressed by only the predetermined calculation. Therefore, in the second modification example of the present embodiment, it is assumed that the calculation method is switched depending on whether the value of MJD is equal to or greater than a predetermined value or less than the predetermined value, so that the date after 'April 23, 2038' can be expressed.

[0222] FIG. 12F shows an example of a first calculation method used when the value of MJD is greater than or equal to a predetermined value and a second calculation method used when the value of MJD is less than the predetermined value. For example, when the predetermined value is '32768 (0x8000)', if MJD is '32768' or more, the current date is calculated using the first calculation method, and if MJD is less than '32768', the current date is calculated using the second calculation method. Note that when MJD is less than '32768', it is equivalent to the case where the most significant bit of the 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 it may be set to '16384 (0x4000)', '49152 (0xC000)', etc. The switching condition of the calculation method may be that the upper 2 bits of the 16-bit data of MJD are '00', or the upper 2 bits of the 16-bit data of MJD are not '11'. Note that when the above-described means is used with the predetermined value of '32768', dates before 'September 4, 1948' cannot be represented, but this is not particularly problematic in terms of practical use as a television receiver.

[0223] Alternatively, 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 first calculation method and the second calculation method may be switched according to a flag obtained by replacing part or all of the'reserved' parameter in the MH-TOT data structure shown in FIG. 12C or a newly added flag. For example, if the flag is set to '1' when the most significant bit of the 16-bit encoded data of MJD is '0' and MJD indicates after 'April 23, 2038', and set to '0' when MJD does not indicate after 'April 23, 2038'. Then, when the flag is '1', the second calculation method shown in FIG. 12F may be used, and when the flag is '0', the first calculation method may be used. Or, a descriptor having the same meaning as the flag may be newly prepared and arranged in MH-TOT.

[0224] Also, in the broadcast system of this embodiment, as described above, the absolute time in NTP format is transmitted, and the broadcast receiving apparatus 100 of this embodiment has a time management function based on the NTP. Further, in the broadcast receiving apparatus 100 of this embodiment, by referring to the NTP timestamp etc. described in the MPU timestamp descriptor set for each MPU unit, the decoding timing and the presentation timing for each presentation unit of the video / audio signal are controlled. As described above, the time information in the NTP format has the configuration shown in FIG. 12B. Also, the MPU timestamp descriptor has the configuration shown in FIG. 7D.

[0225] Therefore, in the broadcast receiving apparatus 100 of this embodiment, it may be possible to refer to the'reference_timestamp' parameter, the 'transmit_timestamp' parameter, or the'mpu_presentation_time' parameter, etc., and select which of the first calculation method and the second calculation method to use according to the value of the referred time data etc. That is, for example, when the most significant bit of the 64-bit long NTP long format time data is '0', the second calculation method may be used, and when it is not '0', the first calculation method may be used, and so on.

[0226] By any of the above methods, in the broadcast receiving apparatus 100 of this embodiment, it is possible to represent a date after 'April 23, 2038'.

[0227] [Station Selection Processing (Initial Scan) of Broadcast Receiving Apparatus] The AMT of the broadcast system of this embodiment provides a list of IP multicast groups for receiving the IP packets transmitted by the communication line with the IP packets transmitted in the TLV multiplexing method with as little difference as possible. For one service identification, it is possible to list a plurality of IP multicast groups. Also, in order to efficiently describe consecutive IP addresses, it is possible to use an address mask.

[0228] In the broadcast receiving apparatus 100 of the present embodiment, when performing channel scanning at the time of initial setting or re-scanning for setting change, it is possible to store a list of services acquired from the TLV-NIT in a non-volatile memory such as the ROM 103 or the storage unit 110. Further, a list of IP multicast groups corresponding to each of the services can be stored in the non-volatile memory in association with each of the services as IP-related information. By storing the list of the services and the IP-related information in the non-volatile memory so that they can be always referred to, it becomes unnecessary to re-acquire the TLV-NIT or AMT at the time of channel switching or the like, and it becomes possible to efficiently acquire broadcast content.

[0229] FIG. 13A is a diagram showing an example of an operation sequence at the time of channel scanning (re-scanning) in the broadcast receiving apparatus 100 of the present embodiment.

[0230] When the channel scanning is started, the reception function execution unit 1102 sets an initial frequency value for the tuner / demodulation unit 131 and instructs it to perform tuning to the frequency value (S101). When the tuner / demodulation unit 131 successfully locks to the set frequency value (S102: Yes), next, the reception function execution unit 1102 acquires the TLV-NIT from the received signal (S103).

[0231] If the TLV-NIT obtained in the process of S103 is valid data (S104: Yes), the reception function execution unit 1102 acquires information such as the TLV stream ID and the original network ID from the obtained TLV-NIT (S105). FIG. 13B shows an example of the data structure of the TLV-NIT. It is assumed that the information of the TLV stream ID can be acquired from the 'tlv_stream_id' parameter, and the information of the original network ID can be acquired from the 'original_network_id' parameter, respectively. Further, 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).

[0232] FIG. 13C shows an example of the data structure of the satellite distribution system descriptor. FIG. 13D shows an example of the data structure of the service list descriptor. When the TLV-NIT has a plurality of different data such as the TLV stream ID, the original network ID, the distribution system information, and the list of service IDs, the processes of S105 to S107 are repeated. Next, the reception function execution unit 1102 creates a service list based on the data such as the TLV stream ID, the original network ID, the distribution system information, and the list of service IDs obtained in the processes of S105 to S107, and stores (updates during rescan) the created service list in the ROM 103 or the storage unit 110, etc. (S108).

[0233] 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. 13E shows an example of the data structure of the AMT. When 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 lists of IP multicast groups related to different service IDs, the processes of S109 to S110 are repeated. Next, the reception function execution unit 1102 stores (updates during rescan) the list of IP multicast groups acquired in the process of S110 in the ROM 103 or the storage unit 110 or the like, in association with the service ID, as IP-related information (S111).

[0234] Note that if in the process of S102, the tuner / demodulation unit 131 fails to lock to the set frequency value (S102: No), and if the TLV-NIT acquired in the process of S103 is not valid data (S104: No), the processes of S105 to S111 are not performed.

[0235] When the process of S111 ends, if the frequency value set in the tuner / demodulation unit 131 is the final frequency value of the channel scan range (S112: Yes), the reception function execution unit 1102 ends the process. On the other hand, if the set frequency value is not the final frequency value of the channel scan range (S112: No), the frequency value set in the tuner / demodulation unit 131 is incremented (S113), and the processes of S102 to S111 are repeated. Note that when all service IDs related to all services constituting the broadcast network can be acquired with one TLV-NIT, and further, an AMT having a list of IP multicast groups related to the service ID can be acquired, the processes of S112 to S113 are unnecessary.

[0236] By the above series of processes, when the broadcast receiver 100 of this embodiment performs channel scanning during initial setting or re-scanning for setting change, it creates / updates a list (service list) of services constituting the broadcast network and simultaneously creates / updates a list (IP-related information) of IP multicast groups corresponding to each service, and can further store them in a non-volatile memory such as the ROM 103 or the storage unit 110.

[0237] Note that the re-scanning for the setting change may be 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. When a change in the 'version_number' parameter of either TLV-NIT or 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 above automatic update is performed, it is desirable to notify the user that the re-scanning has been automatically performed. Also, the user may be notified that there is a change in the information in the table and be allowed to select whether to perform the re-scanning.

[0238] [Station Selection Process (Channel Switching) of Broadcast Receiver] FIG. 14A is a diagram showing an example of an operation sequence at the time of station selection (channel switching) in the broadcast receiver 100 of this embodiment.

[0239] When the user operates a remote controller (not shown) or the like 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, the reception function execution unit 1102 starts acquiring the AMT from the reception signal of the tuner / demodulation unit 131. If the acquisition of the AMT is successful within a predetermined time (S202: Yes), information regarding the list of IP multicast groups corresponding to the service ID is acquired from the acquired AMT (S204). On the other hand, if the acquisition of the AMT is not successful within a predetermined time (S202: No), information regarding the list of IP multicast groups corresponding to the service ID is acquired (S204) by referring to the IP-related information stored in the ROM 103 or the storage unit 110 or the like (S203). Note that the determination process of S202 may not be performed, and the IP-related information stored in the ROM 103 or the storage unit 110 or the like may always be referred to.

[0240] Next, the reception function execution unit 1102 starts acquiring the TLV-NIT from the reception signal of the tuner / demodulation unit 131. If the acquisition of the TLV-NIT is successful within a predetermined time (S205: Yes), distribution system information for acquiring the IP data flow corresponding to the service ID is acquired from the acquired TLV-NIT (S207). On the other hand, if the acquisition of the TLV-NIT is not successful within a predetermined time (S205: No), distribution system information for acquiring the IP data flow corresponding to the service ID is acquired (S207) by referring to the service list stored in the ROM 103 or the storage unit 110 or the like (S206). Note that the determination process of S205 may not be performed, and the service list stored in the ROM 103 or the storage unit 110 or the like may always be referred to.

[0241] When the distribution system information is acquired in the process of S207, next, the receiver function execution unit 1102 controls the tuner / demodulator unit 131 with the frequency value indicated by the acquired distribution system information, receives the IP data flow corresponding to the service ID (S208), extracts the MMT data sequence from the received IP data flow, and outputs it to the separation unit 132.

[0242] In the separation unit 132, the transport processing unit 1102a acquires an MMTP packet whose packet ID is '0' from the input MMT data sequence (S209), and further acquires the MPT included in the acquired MMTP packet (S210). Next, the transport processing unit 1102a refers to the 'MMT_package_id_byte' parameter included in the acquired MPT, and checks whether the lower 16 bits of the 'MMT_package_id_byte' parameter are the same value as the service ID. In an example of the data structure of the MPT shown in FIG. 7B, when the lower 16 bits of the 'MMT_package_id_byte' parameter are the same value as the service ID (S211: Yes), it is determined that the MMTP packet whose packet ID is '0' is an MMTP packet having the data of the program corresponding to the service ID, and the process proceeds to the acquisition process of the MFU based on the information included in the acquired MPT.

[0243] On the other hand, if the lower 16 bits of the `MMT_package_id_byte` parameter are not the same as the service ID (S211: No), it is determined that the MMTP packet with the packet ID of `0` does not have the data of the program corresponding to the service ID. In this case, the transport processing unit 1102a acquires the PLT again (S212), and by checking the acquired PLT, it checks the packet ID (assumed to be x) of the MMTP packet that transmits the MPT having the `MMT_package_id_byte` parameter corresponding to the service ID (S213). Further, the transport processing unit 1102a acquires the MMTP packet with the packet ID of `x` from the input MMT data sequence (S214), and acquires the MPT included in the acquired MMTP packet (S215). Further, based on the information included in the acquired MPT, the acquisition process of the MFU is started.

[0244] Note that the processes of S209 to S211 may not be performed, and the processes of S212 to S215 may always be performed. In this case, when the data of the program corresponding to the service ID is stored in an MMTP packet other than the packet ID `0`, the processing time can be shortened.

[0245] Here, regarding the process of identifying the packet ID of an MMTP packet having program data corresponding to the service ID by checking the PLT as described above and obtaining the MPT, an explanation will be given. It is assumed that an MMTP packet with a packet ID of '0' indicates the transmission of a PA message. When multiplexing a plurality of packets, as shown in FIG. 14B, this PA message includes a PLT (Packet List Table). The PLT has a list of the packet IDs of MMTP packets that transmit PA messages including the MPTs of other packets. By checking the PLT, it becomes possible to identify an MMTP packet that transmits a PA message including the MPT that is the entry point of each service from the packet ID. FIG. 14C shows an example of the data structure of the PLT. It is assumed that the location information for transmitting the PA message of the packet indicated by the 'MMT_package_id_byte' parameter is specified by 'MMT_general_location_info()'.

[0246] Returning to the description of the operation sequence shown in FIG. 14A. In the acquisition process of the MFU, first, the transport processing unit 1102a refers to the MPT acquired in the process of S210 or S215, and acquires the IP address and packet ID of the IP data flow for transmitting the desired MFU (S216). Also, the presentation time of the MPU is acquired from the MPU timestamp descriptor arranged in the MPT, and the layout number of the MPU is acquired from the MPU presentation area designation descriptor arranged in the MPT (S217, S218). Further, the MFU is acquired based on the acquired IP address and packet ID of the IP data flow (S219). Next, encoded video data, encoded audio data, etc. are extracted from the acquired MFU, video / audio decoding processing based on the control of the AV decoding processing unit 1102b is performed, and presentation processing based on the information regarding the acquired presentation time and the information regarding layout control is performed under the control of the presentation processing unit 1102h (S220).

[0247] In addition, when the PLT cannot be obtained in the process of S212, when the parameter "MMT_package_id_byte" that matches the service ID cannot be confirmed in the process of S213, when the MMTP packet with the packet ID "x" cannot be obtained in the process of S215, etc., the program output process based on the data of the MMTP packet with the packet ID "0" obtained in the process of S210 (that is, the processes of S216 to S220) may be performed. Also, in this case, it is advisable to display a message indicating that the program corresponding to the service ID selected by the user cannot be displayed.

[0248] Through the above series of processes, the broadcast receiving apparatus 100 of the present embodiment can execute a channel selection (channel switching) operation. In particular, as described with reference to FIGS. 13A and 14A, at the time of channel scanning during initial setting or at the time of re-scanning for setting change, a service list and IP-related information are created and stored in a non-volatile memory such as the ROM 103 or the storage unit 110 so that they can be always referred to. When performing 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 or the storage unit 110, it is possible to improve the efficiency of the operation at the time of channel selection (channel switching). That is, compared with the case of re-acquiring the AMT and TLV-NIT at the time of channel selection (channel switching), it is possible to shorten the time from the start to the end of channel selection (channel switching).

[0249] [Remote control key setting process of broadcast receiving apparatus] An example of the appearance of a remote controller 100R used for inputting operation instructions to the broadcast receiving apparatus 100 of the present embodiment is shown in FIG. 15A. The remote controller 100R is provided with at least a power key 100R1, a numeric keypad 100R2, channel up / down keys 100R3, a menu key 100R4, an EPG key 100R5, cursor keys 100R6, an enter key 100R7, and color keys 100R8. It may further be provided with volume up / down keys, a network switching key, an input switching key, a recording key, a playback key, etc.

[0250] For example, in the process of S201 of the operation sequence at the time of channel selection shown in FIG. 14A, when instructing the broadcast receiver 100 of this embodiment to switch channels using the remote controller 100R, the following three methods may be used. The first method is to directly input and specify the service ID of a desired channel (service) by pressing the numeric keys 100R2 multiple times. The second method is to perform forward (or reverse) channel search until the desired channel (service) is displayed by repeating the pressing of the channel up / down keys 100R3 as needed. The third method is a so-called one-touch channel selection method of calling a predetermined channel (service) associated with each key of the numeric keys 100R2 by pressing the numeric keys 100R2 only once. The one-touch channel selection, which is the third method, is a convenient channel selection method, but it is necessary to set in advance in the broadcast receiver 100 the association of a predetermined channel (service) with each key of the numeric keys 100R2.

[0251] It is assumed that the broadcast receiver 100 corresponding to the broadcast system of this embodiment can automatically perform the above-mentioned association setting based on the control information included in the digital broadcast wave received by the tuner / demodulator unit 131. That is, the broadcast system of this embodiment prepares a remote control key descriptor as a descriptor of TLV-SI. The above-mentioned association setting may be performed by referring to the remote control key descriptor.

[0252] FIG. 15B shows an example of the data structure of a remote control key descriptor. In the figure, the “service_id” parameter is the service ID that identifies a channel (service). The “remote_control_key_id” parameter is a recommended value of the remote control button number that assigns the channel (service) identified by the service ID. According to the values of the respective parameters, the channel (service) identified by the “service_id” parameter may be associated with the key specified by the value of the “remote_control_key_id” parameter of the numeric keypad 100R2.

[0253] Note that when there are a large number of channels (services) in the same network, the channels (services) may be assigned to keys other than the numeric keypad 100R2. For example, a predetermined channel (service) may be assigned to the color key 100R8, etc. In this case, numerical values corresponding to the “remote_control_key_id” parameter may be assigned to each key of the color key 100R8 in advance.

[0254] The remote control key descriptor may be described as a descriptor of TLV-NIT. Therefore, for example, when the TLV-NIT obtained in the process of S103 of the operation sequence at the time of channel scan shown in FIG. 13A is valid data, in combination with the processes of S105 to S107, the description content of the remote control key descriptor may be stored in a non-volatile memory such as the ROM 103 or the storage unit 110 of the broadcast receiving apparatus 100, thereby performing the above-described association setting.

[0255] In addition to the method of setting the association according to the description content of the remote control key descriptor as described above, the user may also appropriately assign services of any channel to each key of the numeric keypad 100R2 according to their preferences. Also, both the association setting according to the description content of the remote control key descriptor and the association setting assigned by the user according to their preferences may be stored simultaneously in the non-volatile memory of the broadcast receiving apparatus 100, and only one of the settings may be used by selection such as a menu operation. Further, in this case, the association setting assigned by the user according to their preferences may be preferentially used. Also, according to the value of the priority flag described in the remote control key descriptor, the association setting according to the description content of the remote control key descriptor may be preferentially used over the association setting assigned by the user according to their preferences. The priority flag may be set by using a part or all of the'reserved' parameter of the remote control key descriptor shown in FIG. 15B, or may be set by adding a new parameter. In this case, the value of the priority flag may be controllable for each service ID.

[0256] Also, when the association setting assigned by the user according to their preferences is stored in the non-volatile memory, the association setting according to the description content of the remote control key descriptor may not be stored in the non-volatile memory. Also, only the association setting assigned by the user according to their preferences may be stored in the non-volatile memory of the broadcast receiving apparatus 100, and when a remote control key descriptor is described in the received TLV-NIT, the association setting according to the description content of the remote control key descriptor may be used, and when a remote control key descriptor is not described in the received TLV-NIT, the association setting assigned by the user according to their preferences may be used.

[0257] Note that the process of changing the association of a predetermined channel (service) with each key of the numeric keypad 100R2 according to the description content of the remote control key descriptor may be performed simultaneously for all services described in the service list descriptor in the network specified by TLV-NIT, or may be performed only for some services. When the above process is performed only for some services, the old settings may be kept as they are for other services. Also, when the'service_id' parameter is a predetermined value (for example, 999, etc.), only the settings specified by the'remote_control_key_id' parameter among the set contents stored in the non-volatile memory of the broadcast receiving apparatus 100 may be erased.

[0258] That is, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to set the association of a predetermined channel (service) with each key of the numeric keypad 100R2.

[0259] [Channel selection process for multi-programmed channels] In the broadcast system of the present embodiment as well, it is assumed that multi-programming in which a plurality of programs are broadcast in parallel on one channel (service) is possible. When performing simultaneous broadcast of a plurality of programs by multi-programming, it is conceivable that the above-described one-touch channel selection is possible only for the main channel of the multi-programming, and not for the sub-channels of the multi-programming. That is, when selecting a sub-channel of the multi-programming, it is necessary to use a method of directly inputting and specifying the service ID, or a method of selecting a desired sub-channel by pressing the channel up / down key 100R3 after once selecting the main channel of the multi-programming by one-touch channel selection, and there is a problem that the operation becomes complicated.

[0260] In order to solve the above problem, in the broadcast receiving apparatus 100 of the present embodiment, the function of one-touch channel selection is extended, and by repeatedly pressing the numeric keypad 100R2 assigned with a predetermined service ID a plurality of times within a predetermined time, direct selection of a sub-channel of the multi-programming is made possible.

[0261] This will be described with reference to FIG. 16A. For example, assume that a service on channel 011 is pre-assigned to the '1' key of the numeric keypad 100R2 of the remote controller 100R. In this case, if it is a channel selection operation in a state where multi-programming is not being performed (see (A) in the figure), channel 011 will be selected regardless of the number of times the '1' key is pressed. On the other hand, in the case of a channel selection operation in a state where multi-programming is being performed (see (B) in the figure), when the '1' key is pressed only once, channel 011 is selected, and if the '1' key is pressed again within a predetermined time after the first press of the '1' key, channel 012 is selected. Similarly, when the '1' key is pressed three times within the predetermined time, channel 013 is selected. Note that if the '1' key is pressed again after exceeding the predetermined time from the first press of the '1' key, channel 011 may remain selected.

[0262] By enabling the above-described operations, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to directly select a sub-channel during multi-programming with a simpler operation.

[0263] Similarly, the angle selection of a multi-view program or the selection of a predetermined video asset from a plurality of video assets may be performed by repeatedly pressing the numeric keypad 100R2 multiple times. As shown in FIG. 16B, when the service ID of the multi-view program is assigned to the '1' key of the numeric keypad 100R2 of the remote controller 100R, it is assumed that when the '1' key is pressed only once, the multi-view program is tuned and the main view is displayed. Also, when the '1' key is pressed again within a predetermined time from the first press of the '1' key, it is assumed that the sub-view 1 of the multi-view program is displayed. Similarly, when the '1' key is pressed three times within the predetermined time, it is assumed that the sub-view 2 of the multi-view program is displayed. When the '1' key is pressed again after exceeding the predetermined time from the first press of the '1' key, the main view of the multi-view program may remain displayed. The selection of a predetermined video asset from a plurality of video assets may also be possible by the same operation as described above.

[0264] By enabling the operations as described above, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to select the angle of a multi-view program or a predetermined video asset from a plurality of video assets with a simpler operation.

[0265] When one or more programs during multi-channel programming are multi-view programs or programs having a plurality of assets, only one of the above-described operations may be made effective and the other may be made ineffective. For example, when one or more programs during multi-channel programming are multi-view programs or programs having a plurality of assets, the operation of pressing a key multiple times within a predetermined time of the same key may be assigned to the process of directly tuning a sub-channel during multi-channel programming. Which operation is to be made effective and which is to be made ineffective may be determined in advance or may be selected by the user.

[0266] [Screen Layout Control of Broadcast Receiving Apparatus] In the broadcast receiving apparatus 100 of this embodiment, it is assumed that screen layout control based on the description of the LCT is possible. An example of the data structure of the LCT is shown in FIG. 17A. An example of the data structure of the MPU presentation area designation descriptor is shown in FIG. 17B.

[0267] In the data structure of the LCT, in particular, the 'left_top_pos_x' parameter and the 'right_down_pos_x' parameter indicate the horizontal position of the upper left and the horizontal position of the lower right of the area, respectively, as a ratio to the total number of horizontal pixels when the left side of the full-screen display is '0' and the right side is '100'. The 'left_top_pos_y' parameter and the 'right_down_pos_y' parameter indicate the vertical position of the upper left and the vertical position of the lower right of the area, respectively, as a ratio to the total number of vertical pixels when the upper side of the full-screen display is '0' and the lower side is '100'. Also, the 'layer_order' parameter indicates the relative position in the depth direction of the area.

[0268] An example of the assignment of the layout to the layout number based on the setting of each parameter will be described below together with the set values of each parameter.

[0269] FIG. 17C shows the default layout setting of the broadcast receiving apparatus 100 of this embodiment, which is an example of setting only one area on the entire screen. FIG. 17D shows an example in the case where the entire screen is divided into three areas, and each area is set as 'area 0', 'area 1', and 'area 2'. For example, when the number of pixels of the entire screen is 7680 pixels horizontally and 4320 pixels vertically, 'area 0' is set in the range of (0,0)-(6143,3455) because the 'left_top_pos_x' parameter is '0', the 'left_top_pos_y' parameter is '0', the 'right_down_pos_x' parameter is '80', and the 'right_down_pos_y' parameter is '80'. 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).

[0270] FIG. 17E is an example of setting three regions as in FIG. 17D. However, “Region 0” is set in the range of (0,0)-(7679,4319), and “Region 1” and “Region 2” are in the same range as described above, and are arranged in front of “Region 0” according to the setting of the “layer_order” parameter. FIG. 17F is an example when “Region 0” is set for Device 0 (default device: the broadcast receiving apparatus 100 in this embodiment) and “Region 1” is set for Device 1 (in this embodiment, the portable information terminal 700).

[0271] As described above, in the broadcast system of this embodiment, by using the LCT, it becomes possible to perform screen layout control for displaying multimedia services on the receiver as intended by the service provider.

[0272] Note that in the region where the program video or data screen is not displayed due to the above-described screen layout control, a predetermined background color specified by the background color descriptor described in the LCT may be displayed. Also, when the LCT does not include the background color descriptor, when the broadcast receiving apparatus 100 fails to correctly acquire the background color descriptor, when the predetermined background color specified by the background color descriptor cannot be displayed due to hardware limitations, etc., the video display apparatus 100 may display a predetermined pattern previously determined in the region. Also, the region may be used as a notification display region for the user from the video display apparatus 100. Note that the notification may be arbitrary information.

[0273] In addition, when dividing the screen according to the set values of parameters such as the above-mentioned "left_top_pos_x", the fractional part generated can be processed by rounding up, rounding down, or the like. Rounding (or rounding to the nearest even number in binary) can also be used. For example, when the number of pixels in 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", and the "right_down_pos_y" parameter is "51", "Region 0" can be set in the range of (0,0)-(3916,2203) by rounding up, or "Region 0" can be set in the range of (0,0)-(3915,2202) by rounding down. Also, considering the macroblocks during video compression processing, rounding up / rounding down processing in units of 8 pixels, 16 pixels, etc. can be performed. By the above processing, it becomes possible to efficiently perform region setting based on LCT and resolution conversion processing of multimedia content in the region.

[0274] Alternatively, the set values of the parameters such as the above-mentioned "left_top_pos_x" may be restricted to only "multiples of 5" or "multiples of 10" in the range from "0" to "100". Also in this case, it becomes possible to suitably perform the above-mentioned region setting.

[0275] Note that the content displayed in each region is specified by the MPU presentation area designation descriptor shown in FIG. 17B. The content of the MPU whose sequence number is specified by the "mpu_sequence_number" parameter in the figure is associated with the description of the LCT by the "layout_number" parameter and the "region_number" parameter.

[0276] Also, within the first 'for' loop of the description of the MPU presentation area specification descriptor, multiple 'layout_number' parameters and'region_number' parameters may be described for one'mpu_sequence_number' parameter, and the user may be allowed to select according to which description to perform layout control. For example, within the first 'for' loop, if the 'layout_number1' parameter, the'region_number1' parameter, the 'layout_number2' parameter, and the'region_number2' parameter are described for a predetermined'mpu_sequence_number' parameter, the user may be allowed to select whether to perform the layout control of the MPU specified by the'mpu_sequence_number' parameter based on the 'layout_number1' parameter and the'region_number1' parameter, or based on the 'layout_number2' parameter and the'region_number2' parameter, etc. In this way, the user can perform layout control regarding the video program according to their preference.

[0277] [Exception Handling for Screen Layout Control of Broadcast Receiver] In the broadcast receiver 100 of this embodiment, even when the area control of the screen layout is performed by the aforementioned LCT, when the user instructs the display of the EPG screen, etc., as an exception process, it is assumed that it is possible to perform screen layout control ignoring the description content of the LCT. FIG. 18A shows an example of the operation of exception handling for screen layout control based on the LCT.

[0278] With the description of the LCT, the same screen layout control as in FIG. 17D is performed. When the broadcast program video is displayed in 'Area 0' and broadcast contents such as program linkage data linked to the broadcast program are displayed in 'Area 1' and 'Area 2', if the user instructs the display of the EPG screen using a remote control (not shown), in the broadcast receiving apparatus 100 of the present embodiment, as shown in FIG. 18A(A), regardless of the description content of the LCT, the screen layout setting is returned to the default setting (i.e., the state where the same screen layout control as in FIG. 17C is being performed), and the EPG screen is controlled to be displayed across the entire screen. Further, when the user instructs the end of the display of the EPG screen, the screen layout control according to the description content of the LCT is re-executed.

[0279] By performing the above control, as shown in FIG. 18A(B), compared with the case of displaying the EPG screen while maintaining the area control of the screen layout, the EPG screen can be displayed larger, and the visibility can be improved.

[0280] Note that the exception processing for the screen layout control is not only applied when the EPG screen is displayed, but may also be applied when a child screen is displayed or when a two-screen display is performed on various setting screens (in the example shown in the figure, the recording setting screen) of the broadcast receiving apparatus 100, as shown in FIG. 18B.

[0281] In the case of the recording setting screen shown in FIG. (A), the display area of the broadcast content is changed from the entire screen to only the sub-screen part in the lower right of the screen. Similarly, in the case of the two-screen display shown in FIG. (B), the display area of the broadcast content is changed from the entire screen to only the split-screen part on the left side in the middle of the screen. In either case, since the display area for displaying the broadcast content becomes narrower compared to the case of using the entire screen, it is not visually preferable to maintain the area control of the screen layout within the said display area (i.e., while performing area division and displaying a plurality of broadcast contents simultaneously). Therefore, in the broadcast receiving apparatus 100 of the present embodiment, in such a situation, only the broadcast content of 'area 0' is selected and displayed in the said display area. Note that, depending on the previous area selection situation, the broadcast content of 'area 1' or 'area 2' may be selected and displayed.

[0282] By performing the above control, it becomes possible to improve the visibility of the broadcast content compared to the case of displaying various broadcast contents while maintaining the area control of the screen layout. The same applies to the sub-screen display on the recording program list screen and the browser display of Internet content, etc.

[0283] [Aspect Ratio Conversion Processing of Video Signal] In the aspect ratio of the video signal in the television broadcast service, in addition to '4:3' used in conventional SDTV and '16:9' used in recent HDTV, there are '21:9' suitable for movie content, etc. In the broadcast system of the present embodiment, the information on the aspect ratio of the video signal may be described by a video component descriptor. FIG. 19A shows an example of the data structure of the video component descriptor. In the figure, the 'video_aspect_ratio' parameter is information regarding the aspect ratio of the video signal. FIG. 19B shows an example of the meaning of the 'video_aspect_ratio' parameter. Different aspect ratios may be further assigned other than those shown.

[0284] On the one hand, it is common for the aspect ratio of the display unit of a television receiver (such as the broadcast receiving device 100 in this embodiment) capable of receiving the television broadcast service to be '16:9'. That is, when displaying video content with an aspect ratio of '4:3' or '21:9' on a general television receiver, aspect ratio conversion processing may be performed.

[0285] Whether to perform the aspect ratio conversion processing may be determined by comparing the specification of the monitor unit 162 of the broadcast receiving device 100 with the 'video_aspect_ratio' parameter of the video component descriptor. For example, when the aspect ratio of the monitor unit 162 of the broadcast receiving device 100 is '16:9' (such as 3840 pixels horizontally × 2160 pixels vertically, etc.), if the value of the 'video_aspect_ratio' parameter is '0', '2', or '3', the aspect ratio conversion processing may not be performed, and if it is '1' or '5', the aspect ratio conversion processing may be performed. Also, for example, when the aspect ratio of the monitor unit 162 of the broadcast receiving device 100 is '21:9' (such as 5040 pixels horizontally × 2160 pixels vertically, etc.), if the value of the 'video_aspect_ratio' parameter is '0' or '5', the aspect ratio conversion processing may not be performed, and if it is '1', '2', or '3', the aspect ratio conversion processing may be performed.

[0286] An example of the aspect ratio conversion process when the aspect ratio of the monitor unit 162 of the broadcast receiving apparatus 100 is '16:9' and the value of the 'video_aspect_ratio' parameter is '5' is shown in FIGS. 19C and 19D. When displaying video content with an aspect ratio of '21:9' on the monitor unit 162 with an aspect ratio of '16:9', the aspect ratio may be converted to '16:9' by adding black bands above and below the video content with an aspect ratio of '21:9' (display A in the figure). In this way, it becomes possible to display the entire area of the original video content without distortion. Also, only the central portion of the video content with an aspect ratio of '21:9' may be cut out and displayed on the monitor unit 162 (display B in the figure). In this way, it becomes possible to display the main part of the original video content largely. Also, a little black band may be added above and below the video content with an aspect ratio of '21:9', and the central portion may be further cut out (display C in the figure). In this way, it becomes possible to display most of the original video content largely. Also, the left and right ends of the video content with an aspect ratio of '21:9' may be compressed to display the entire area (display D in the figure). In this way, it becomes possible to display the entire area of the original video content largely and the main part without distortion. Also, a little black band may be added above and below the video content with an aspect ratio of '21:9', and the left and right ends may be further compressed to display the entire area (display E in the figure). In this way, it becomes possible to display the entire area of the original video content largely and reduce the distortion at the left and right ends.

[0287] How to perform the aspect ratio conversion process may be made selectable by the user according to settings such as in a menu. Alternatively, it may be made switchable by pressing a predetermined key such as on a remote control. Note that the aforementioned aspect ratio '21:9' includes those with an aspect ratio approximately '21:9' such as the so-called CinemaScope's '2.35:1'. The same applies to numerical values of other aspect ratios.

[0288] [EPG Display of Broadcast Receiving Apparatus] In the broadcast system of this embodiment, assume that time series information regarding events (so-called programs) included in each service constituting the broadcast network is transmitted by MH-EIT. The MH-EIT shown in FIG. 7E is identified into two classes by a table ID (corresponding to the "talbe_id" parameter in the figure), and it is assumed that it can indicate information on the current / next event of its own TLV stream and schedule information of each event of its own TLV stream. The broadcast receiving apparatus 100 of this embodiment can acquire information such as the start time and broadcast time of each event by performing identification based on a service ID (corresponding to the "service_id" parameter in the figure) with reference to the MH-EIT or the like, and create an EPG screen, and it is assumed that the created EPG can be superimposed on video information or the like by the video composition unit 161 and displayed on the monitor unit 162.

[0289] FIG. 20A is a diagram showing an example of an EPG screen in the broadcast receiving apparatus 100 of this embodiment. The EPG screen 162a is in a matrix shape with the vertical axis representing time display and the horizontal axis representing service ID (channel) display, and is configured to display detailed information on broadcast programs broadcast on each channel in each time zone. Further, the detailed information 162a1 of each broadcast program mainly consists of a title area 162a2 and a detailed description area 162a3. In the detailed information 162a1 of each broadcast program, program information or the like described in the MH-short form event descriptor or the MH-extended form event descriptor may be displayed. When the capacity of the program information or the like described in each descriptor is large, it may be displayed in an abbreviated form during normal times, and all program information may be displayed in a pop-up or the like when selected by operating a remote controller (not shown). Alternatively, when selected, the program information or the like described in each descriptor may be transmitted to the portable information terminal 700 during the cooperative operation, and the portable information terminal 700 may be instructed to display it on the display unit 741.

[0290] In the title area 162a2 of the detailed information 162a1 of each broadcast program, the program title of the broadcast program and symbols or the like representing the attributes of the broadcast program are displayed. Symbols or the like representing the attributes of the broadcast program are, for example, symbols / characters indicating that it is a new program, symbols / characters indicating that it is a rebroadcast program, and the like. Alternatively, it may be a symbolized mark such as 'data' indicating that it supports data broadcasting by a broadcast service. It may also be a symbolized mark 162a4 or the like of 'NetWork' indicating that contents, applications, etc. related to the broadcast program can be acquired from the network. Also, by differentiating 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.

[0291] Note that even when each control information (message, table, descriptor, etc.) in the broadcast system of this embodiment indicates that contents, applications, etc. related to the broadcast program can be acquired from the network, if access to each server device on the network is not possible, such as when a LAN cable is not connected to the LAN communication unit 121 of the broadcast receiving apparatus 100, it may be controlled not to display a symbolized mark 162a4 or the like of the 'NetWork'.

[0292] Also, when the broadcast program is a distributed program distributed via the Internet 200 and cannot be acquired only from broadcast waves, and further, when the broadcast receiving apparatus 100 cannot access each server apparatus on the network as described above, etc., as shown in FIG. 20B, the portion of the detailed information 162b1 displayed on the EPG screen 162b may be controlled to be grayed out. That is, control is performed so as not to display the detailed information of the undistributable program that cannot be viewed. Further, it may be used as an alternative to the graying-out process by differentiating the background color of the detailed information 162b1 from others. Alternatively, a message such as 'This program cannot be viewed' may be displayed in the detailed explanation area 162a3 of the distributed program. When the detailed information 162b1 is selected by operating a remote controller (not shown), a message indicating that the broadcast receiving apparatus 100 cannot access each server apparatus on the network, or that the distributed program associated with the detailed information 162b1 cannot be viewed, may be notified to the user by a pop-up or the like.

[0293] By the above-described respective controls, the broadcast receiving apparatus 100 can provide the program information of each broadcast program to the user in a form that causes less discomfort according to the network connection status.

[0294] FIG. 20C is a diagram showing another example of the EPG screen in the broadcast receiving apparatus 100 of the present embodiment. In the figure, 'M1 TV', 'M2 Broadcasting', 'M3 Channel', 'M4 TV', 'TV M5', etc. are the names of the broadcasting stations of each channel. In particular, the 'M2 Broadcasting' station is assumed to simultaneously provide a broadcast program distributed by broadcast waves and a distributed program (information 162c1 in the frame indicated by 'Internet Broadcast' in the figure) distributed via the Internet 200.

[0295] As shown in the figure, when there is a channel that only has broadcast programs distributed via the Internet 200, during normal times, it is controlled to display information of all channels (including information 162c1) as shown in the EPG screen 162c of FIG. (A). On the other hand, when the broadcast receiving apparatus 100 is in a state where it cannot access each server apparatus on the network, etc., as shown in the EPG screen 162d of FIG. (B), the information of the channel of "M2 Broadcast (Internet Broadcast)" that only has broadcast programs distributed via the Internet 200 (information 162c1 in FIG. (A)) may not be displayed.

[0296] By the above-described respective controls, the user of the broadcast receiving apparatus 100 can be made unnecessary to confirm information of channels that he / she cannot view.

[0297] [Emergency Warning Broadcast Display of Broadcast Receiving Apparatus] It is assumed that the broadcast receiving apparatus 100 of the present embodiment can perform reception processing of an emergency warning broadcast when the emergency warning broadcast activation control signal bit of the TMCC signal included in the transmission data including the TLV stream changes from '0' to '1'.

[0298] The emergency warning broadcast may be provided as a broadcast program of a dedicated channel (service ID), may be provided as an application for full-screen display, or may be provided as character information with a character super. When the emergency warning broadcast is provided as character information with a character super, it is preferable to display the character information of the character super regardless of the state of the broadcast receiving apparatus 100 immediately before reception of the emergency warning broadcast. That is, as shown in FIG. 21, when the user is viewing a normal broadcast program and the emergency warning broadcast is received while the program screen 162e of the broadcast program is displayed on the monitor unit 162, the character information 162e1 by the emergency warning broadcast is superimposed and displayed on the program screen 162e. Similarly, when the user instructs to display the EPG screen and the emergency warning broadcast is received while the EPG screen 162f is displayed on the monitor unit 162, it is controlled to superimpose and display the character information 162f1 by the emergency warning broadcast on the EPG screen 162f.

[0299] With the above 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., when an emergency warning broadcast is received, it is possible to avoid overlooking important character information based on the emergency warning broadcast. Note that this control may be performed on character information of normal character superscripts that are not based on emergency warning broadcasts.

[0300] Also, when the emergency warning broadcast is provided as a broadcast program on a dedicated channel (service ID), regardless of the channel (service ID) of the program currently being viewed, the channel (service ID) of the emergency warning broadcast may be automatically tuned. Further, when the emergency warning broadcast is provided as a broadcast program on a dedicated channel (service ID) or provided as an application, under the control of the cooperation function execution unit 1103, the broadcast program or application of the emergency warning broadcast may be distributed to an external mobile terminal device to be cooperated (in this embodiment, a mobile information terminal 700, etc.).

[0301] Also, when the power of the broadcast receiving apparatus 100 is not on when the emergency warning broadcast is distributed, control may be performed to automatically turn on the power of the broadcast receiving apparatus 100. Alternatively, control may be performed to transmit a notification to the mobile information terminal 700 having a history of cooperation operations with the broadcast receiving apparatus 100 that the emergency warning broadcast has started.

[0302] With the above control, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to avoid overlooking the display of important broadcast programs and application videos based on the emergency warning broadcast.

[0303] [Exception Processing for Display Control] When the broadcast receiving apparatus 100 of the present embodiment cannot acquire data transmitted through a path other than the TLV stream among each data constituting the same package, for example, the following exception processing may be performed.

[0304] As described with reference to FIG. 7A, in the broadcast system to which the broadcast receiving apparatus 100 of the present embodiment corresponds, based on the location information stored in the MPT (see FIG. 7C), data acquired from the TLV stream and data acquired from a path other than the TLV stream can be included in the same package. However, data transmitted through a data transmission path other than the TLV stream indicated by the location information (for example, an IPv4 data flow or an IPv6 data flow of a communication line, an MPEG2-TS of a broadcast, etc.) is data acquired by a receiving function different from the receiving function of the TLV / MMT stream. Therefore, even during the operation of the broadcast receiving apparatus 100, there may be situations where the receiving functions of these transmission paths are not operating, situations where the relay devices on the transmission paths are not operating even though the receiving functions themselves are operating, situations where the wired or wireless connections of these transmission paths are not established, or situations where the broadcast receiving apparatus 100 is installed in an environment where these transmission paths cannot be connected at all, and thus data cannot be acquired from these transmission paths.

[0305] When the broadcast receiving apparatus 100 of the present embodiment receives an event indicating that the location information stored in the MPT is associated so as to include data acquired from the TLV stream and data acquired from a path other than the TLV stream in the same package under such circumstances, the broadcast receiving apparatus 100 may perform the following operations.

[0306] For example, as shown in FIGS. 17D and 17E, the LCT sets a plurality of regions within the screen, and associates the display of program video based on the data obtained from the TLV stream with "Region 0", and associates the display of content based on the data obtained from a transmission path other than the TLV stream with "Region 1" and "Region 2". If the data of the transmission path other than the TLV stream to be displayed in "Region 1" and "Region 2" cannot be obtained, the LCT may prohibit the layout display of the plurality of regions. Specifically, even if the LCT is received, the program video based on the data obtained from the TLV stream may be displayed in "Region 0" of the default layout display shown in FIG. 17C, and the layout display of the plurality of regions such as FIGS. 17D and 17E may not be shifted to. Further, 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 the broadcast receiving apparatus 100 in this state, the default layout display shown in FIG. 17C may be maintained, or the display may be switched to another data broadcast screen, etc., so as not to shift to the layout display of the plurality of regions such as FIGS. 17D and 17E.

[0307] In addition, as shown in FIGS. 17D and 17E, the LCT sets a plurality of regions within the screen, and associates the display of program video based on the data obtained from the TLV stream with "Region 0", and the display of content based on the data obtained through a transmission path other than the TLV stream with "Region 1" and "Region 2". As another operation example when the data of the transmission path other than the TLV stream to be displayed in "Region 1" and "Region 2" cannot be obtained, once the display frames of the multiple regions shown in FIGS. 17D and 17E indicated by the LCT are displayed, a background color or a predetermined still image is displayed for "Region 1" and "Region 2". If the data of the transmission path other than the TLV stream indicated by the location information of the MPT cannot be obtained even after a predetermined time has elapsed, a display switch may be performed to return to the state of the default layout display shown in FIG. 17C. In this case, when changing from the layout of FIG. 17C to the layout of FIGS. 17D and 17E and when changing from the layout of FIGS. 17D and 17E to the layout of FIG. 17C, if the operation is performed so that the program video based on the data obtained from the TLV stream is continuously displayed in "Region 0" of each layout, it is preferable because the user can continue to view the program video itself.

[0308] In addition, when data of a transmission path other than the TLV stream to be displayed in “Region 1” or “Region 2” cannot be acquired, and a program video based on the data acquired from the TLV stream is being displayed in “Region 0” of the default layout display shown in FIG. 17C, when the operations of various communication functions and various reception functions of the broadcast receiving apparatus 100 of the present embodiment start, or when the communication environment / communication status of various communication functions and the reception environment / reception status of various reception functions change, it may be possible to acquire data of a transmission path other than the TLV stream to be displayed in “Region 1” or “Region 2”. In this case, the broadcast receiving apparatus 100 of the present embodiment immediately switches from the default layout display shown in FIG. 17C to a layout of a plurality of regions as shown in FIGS. 17D and 17E indicated by the LCT, displays a program video based on the data acquired from the TLV stream in “Region 0”, and may switch to display content based on the data acquired from a transmission path other than the TLV stream in “Region 1” or “Region 2”. Alternatively, without immediately changing the layout, 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. In this case, it is preferable to notify the user by OSD display or the like that the layout change has become possible.

[0309] [Copyright protection function] In the digital broadcast system compatible with the broadcast receiving apparatus 100 of the present embodiment, by transmitting including copy control information to MPT or the like, for example, "Copy unrestricted" (it may be divided into two types: "Copy unrestricted and encryption processing required at the time of storage and output" and "Copy unrestricted and encryption processing not required at the time of storage and output"), "Copyable only for one generation", "Copyable a predetermined number of times" (for example, if it is copyable 9 times + movable 1 time, so-called "Dubbing 10"), "Copy prohibited", etc., may indicate the copy control state of the content referred to by MPT or the like. In this case, the broadcast receiving apparatus 100 of the present embodiment may be configured to control the storage (accumulation) of the content in the storage (accumulation) unit 110, the recording on the removable recording medium, the output to the external device, the copy to the external device, the move process to the external device, etc. according to the copy control information.

[0310] Note that the target of the accumulation process includes not only the storage (accumulation) unit 110 inside the broadcast receiving apparatus 100, but also a removable recording medium or an external device or the like 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, for example, among the external recording devices such as an HDD connected to the extended interface unit 124, those that are made recordable and reproducible only by the broadcast receiving apparatus 100 are included.

[0311] <Content Copy Control> A specific example of the content copy control process based on the copy control information will be described below.

[0312] First, when the copy control information included in MPT or the like indicates "Copyable without restriction", the broadcast receiving apparatus 100 of the present embodiment may perform storage in the storage (accumulation) unit 110, recording on a removable recording medium, output to an external device, copying to an external device, move processing to an external device, etc. without restriction. However, when the control based on the copy control information is divided into "Copyable without restriction and encryption processing required during storage and output" and "Copyable without restriction and encryption processing not required during storage and output", and when it indicates "Copyable without restriction and encryption processing required during storage and output", storage in the storage (accumulation) unit 110, recording on a removable recording medium, output to an external device, copying to an external device, move processing to an external device, etc. can be performed without restriction, but in any case, it is necessary to perform encryption processing.

[0313] Also, when the copy control information included in MPT or the like indicates "Copyable only for one generation", the broadcast receiving apparatus 100 of the present embodiment may enable storage in the storage (accumulation) unit 110 after encryption and recording on a removable recording medium that has been subjected to protection processing such as encryption processing that can be reproduced only by the broadcast receiving apparatus 100. Also, when outputting the accumulated content to an external device for viewing, it shall be output after encryption together with the copy control information of "Copy prohibited". Also, so-called move processing to an external device (copying the content to an external device and making the content in the storage (accumulation) unit 110 of the broadcast receiving apparatus 100, etc. unplayable by a deletion process or the like) is enabled.

[0314] Also, when the copy control information included in MPT or the like indicates "Copyable a Predetermined Number of Times", the broadcast receiving apparatus 100 of the present embodiment may be capable of performing processes such as encrypting and storing in the storage (accumulation) unit 110, or recording on a removable recording medium that has been subjected to protection processes such as an encryption process that enables playback only by the broadcast receiving apparatus 100. Also, when outputting the accumulated content to an external device for viewing, it shall be output after being encrypted together with the copy control information of "Copy Prohibited". Also, it may be possible to perform a predetermined number of copies and move processes to an external device. In the case of the so-called "Dubbing 10" regulation, it is possible to perform 9 copies and 1 move process to an external device.

[0315] Also, when the copy control information included in MPT or the like indicates "Copy Prohibited", the broadcast receiving apparatus 100 of the present embodiment prohibits storage (copy) to the storage (accumulation) unit 110 or the like. However, the broadcast receiving apparatus 100 may be configured to have a "Temporary Storage" mode that enables retention in the storage (accumulation) unit 110 or the like only for a predetermined time determined in advance or for a predetermined time specified by control information included in the broadcast signal (for example, by an MH-Expire descriptor or a content usage control descriptor). In this case, even when the copy control information included in MPT or the like indicates "Copy Prohibited", the broadcast receiving apparatus 100 can temporarily retain the content in the storage (accumulation) unit 110 or the like. When outputting the content for which the copy control information included in MPT or the like indicates "Copy Prohibited" to an external device for viewing, it shall be output after being encrypted together with the copy control information of "Copy Prohibited".

[0316] Note that the above-described output for viewing to an external device may be performed via the video output unit 163 and the audio output unit 166 of the broadcast receiving apparatus 100 of the present embodiment, or via the digital I / F unit 125, the LAN communication unit 121, or the like. The above-described copy or move process to an external device may be performed via the digital I / F unit 125, the LAN communication unit 121, or the like.

[0317] Fig. 22A shows an example of the data structure of the content copy control descriptor in the broadcast system of this embodiment. Assume that the 'digital_recording_control_data' parameter in the figure is digital copy control information, indicating information for controlling the copy generation of content. Fig. 22B shows an example of the parameter values of the digital copy control information and their meanings. For example, when the parameter is '00', it indicates 'copyable without restriction'; when the parameter is '01', it can be defined by the broadcaster; when the parameter is '10', it indicates 'copyable only once'; when the parameter is '11', it indicates 'copy prohibited'. Fig. 23 shows an example of the data structure of the content usage control descriptor in the broadcast system of this embodiment. The 'copy_restriction_mode' parameter in the figure is the copy restriction mode, indicating whether copy with a quantity limit is possible.

[0318] In the broadcast receiving apparatus 100 of this embodiment, when the digital copy control information is '01', it is assumed that an accumulation process allowing a predetermined number of copies defined in advance by the broadcaster can be executed. Alternatively, when the digital copy control information is not '11' and the copy restriction mode indicates that copy with a quantity limit is possible, an accumulation process allowing a predetermined number of copies defined in advance by the broadcaster may also be executable. Or, in this case, the number of copies possible for each content may be specified by using part or all of the'reserved_future_use' parameter of the digital content usage descriptor.

[0319] Through the above processing, the broadcast receiving apparatus 100 of this embodiment can realize the content copy control of 'copyable a predetermined multiple times' described above.

[0320] In addition, when the “retention_mode” parameter in the content usage control descriptor shown in FIG. 23 is the temporary storage control bit and the digital copy control information indicates “copy prohibited”, it indicates whether to allow temporary storage of the target content. Further, the “retention_state” parameter is the temporary storage allowable time, and indicates the temporary storage allowable time when the temporary storage allowable bit allows temporary storage of the target content.

[0321] In the broadcast receiving apparatus 100 of this embodiment, by referring to each piece of information on the temporary storage control bit and the temporary storage allowable time, it is possible to control whether temporary storage is possible and the storage time when the digital copy control information of each content indicates “copy prohibited”.

[0322] According to the process described above, appropriate content protection can be realized according to the copy control information associated with the content.

[0323] <Content Output Control> Next, a specific example of the process for controlling the output of content to an external device will be described below.

[0324] In the content usage control descriptor shown in FIG. 23, the 'image_constraint_token' parameter is a resolution limit bit, which indicates whether image quality limitation is required when outputting content to an external device. When the resolution limit bit indicates that image quality limitation is required, the broadcast receiving apparatus 100 of the present embodiment shall perform image quality limitation on the target content when outputting the target content to an external device. Note that when storing (accumulating) in the storage (accumulation) unit 110 or the like, the image quality limitation may not be necessary. The image quality limitation is, for example, converting the received (or stored) UHD (7680 pixels × 4320 pixels) video content into SHD (3840 pixels × 2160 pixels) video and outputting it, or converting HD (1920 pixels × 1080 pixels) video into SD (640 pixels × 480 pixels) video and outputting it, and so on. Note that how much the image quality of the target content is limited, that is, to what resolution the image quality after the image quality limitation is set, may be specified by using part or all of the'reserved_future_use' parameter of the digital content usage descriptor.

[0325] Similarly to the above, for example, a frame rate limit bit and a pixel resolution limit bit are prepared by using part or all of the'reserved_future_use' parameter, and the frame rate and pixel resolution are controlled when outputting the content to an external device. When the frame rate limit bit indicates that frame rate limitation is required, the broadcast receiving apparatus 100 of the present embodiment shall perform frame rate limitation on the target content when outputting the target content to an external device. For example, converting video content with a frame rate of 120 Hz into video with a frame rate of 60 Hz and outputting it, and so on. Also, when the pixel resolution limit bit indicates that pixel resolution limitation is required, the broadcast receiving apparatus 100 of the present embodiment shall perform pixel resolution limitation on each pixel of the target content when outputting the target content to an external device. For example, converting each pixel of video content in which each pixel is composed of 12 bits into 8 bits and outputting it, and so on.

[0326] Furthermore, resolution control flags, frame rate control flags, and pixel resolution control flags may be prepared by using some or all of the 'reserved_future_use' parameter, etc., and whether to perform the image quality limitation, frame rate limitation, or pixel resolution limitation may be controlled according to the resolution control flag, frame rate control flag, and pixel resolution control flag. For example, when the resolution control flag indicates that resolution control is performed according to the interface specification, if the interface for outputting the target content has a predetermined content protection technology, the image quality limitation is not performed, and if it does not have a predetermined content protection technology, control may be performed so that the image quality limitation is performed.

[0327] Specifically, for example, when the digital interface unit 125 is an HDMI interface and the target content is output to an external device connected to the HDMI interface, if the HDMI interface of the external device supports HDCP (High-bandwidth Digital Content Protection) version 2.2 or later, the target content is output without performing the image quality limitation, and if the HDCP version of the HDMI interface of the external device is less than 2.2, the image quality limitation is performed and the target content is output. That is, whether to perform the image quality limitation of the target content may be controlled according to whether the interface for outputting the target content has a predetermined content protection technology, or, when having the content protection technology, according to the version of the content protection technology. Note that when the resolution control flag does not indicate that resolution control is performed according to the interface specification, the presence or absence of the image quality limitation may be controlled only according to the resolution limit bit. The same processing may be performed for the frame rate control flag and the pixel resolution control flag.

[0328] Also, regarding the copy process to an external device via the LAN communication unit 121 of content indicating copy restrictions such as "copyable only once", "copyable a predetermined number of times", and "copy prohibited" in the aforementioned copy control information, it is only possible when the IP address of the external device, which is the destination of the transmission packet from the broadcast receiving device 100, is within the same subnet as the IP address of 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 device 100, it may be prohibited. Content with copy control information of "unrestrictedly copyable and requires encryption processing during storage and output" may be treated similarly.

[0329] Similarly, regarding the move process, copy process, etc. to an external device via the LAN communication unit 121 after once storing (accumulating) content indicating copy restrictions such as "copyable only once", "copyable a predetermined number of times", and "unrestrictedly copyable and requires encryption processing during storage and output" in the aforementioned copy control information in the storage (accumulation) unit 110, it is only possible when the IP address of the external device, which is the destination of the transmission packet from the broadcast receiving device 100, is within the same subnet as the IP address of 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 device 100, it may be prohibited.

[0330] Also, for the video output for viewing and audio output of the content stored in the storage (accumulation) unit 110 of the broadcast receiving apparatus 100, in principle, it is only possible when the IP address of the external device which is the destination of the transmission packet from the broadcast receiving apparatus 100 is within the same subnet as the IP address of the broadcast receiving apparatus 100, and it 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, when the external device has been connected within the same subnet as the IP address of the broadcast receiving apparatus 100 within a predetermined period, and a registration process (pairing) has been performed as a device that can be viewed even outside the same subnet as the IP address of the broadcast receiving apparatus 100, even 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 configured to enable the video output for viewing and audio output of the content stored in the storage (accumulation) unit 110 of the broadcast receiving apparatus 100 to the external device. In this case, the video output for viewing and audio output are performed after encrypting the content.

[0331] However, the encryption process may be controlled according to the value of the 'encryption_mode' parameter of the content usage control descriptor shown in FIG. 23. That is, when the value of the 'encryption_mode' parameter indicates that output protection of the IP interface output is required, the encryption process is performed, and when the value of the 'encryption_mode' parameter indicates that output protection of the IP interface output is not required, the video output for viewing and audio output may be performed without performing the encryption process. Also, when the value of the 'encryption_mode' parameter indicates that output protection of the IP interface output is required, the range of the IP addresses of external devices that can perform the video output for viewing and audio output without performing the encryption process may be specified by using part or all of the'reserved_future_use' parameter of the content usage control descriptor. That is, for a predetermined IP address, even if the IP address is not within the same subnet as the IP address of the broadcast receiving apparatus 100, it is possible to perform the video output for viewing and audio output.

[0332] Also, the period for enabling the registration process (pairing) may be specified by using part or all of the'reserved_future_use' parameter of the content usage control descriptor. In this case, if the date and time when the registration process (pairing) of the external device is executed is within the specified period, even if the external device is outside the same subnet as the IP address of the broadcast receiving device 100, video output and audio output for viewing the external device may be permitted, and control may be performed so as not to permit it outside the specified period.

[0333] Also, the above-described move process, copy process, output process, etc. of the content to the external device via the LAN communication unit 121 of the content may be controlled according to the value of the'remote_view_mode' parameter of the content usage control descriptor. That is, when the value of the'remote_view_mode' parameter does not permit remote viewing of the target content, control may be performed to prohibit all of the move process, copy process, output process, etc. of the content to the external device via the LAN communication unit 121 of the content.

[0334] According to the processes described above, appropriate content protection can also be realized when outputting the content to an external device.

[0335] <Exception Processing 1 for Content Copy Control> In the data structure of the content copy control descriptor shown in FIG. 22A, the first digital copy control information (the 'digital_recording_control_data' parameter located immediately after 'descriptor_length') is copy generation control information regarding the entire content, and the second digital copy control information (the 'digital_recording_control_data' parameter located immediately after 'component_tag') is copy generation control information regarding each of the components constituting the content. Note that the designation of each component is made by the 'component_tag' parameter.

[0336] In the broadcast system of this embodiment, when performing copy generation control for the entire content (program), only the first digital copy control information is described in the content copy control descriptor, and copy generation control is performed based on the first digital copy control information. On the other hand, when performing copy generation control for each component constituting the content, both the first digital copy control information and the second digital copy control information are described in the content copy control descriptor, and copy generation control is performed. Further, when performing copy generation control for each component constituting the content, a situation where the descriptions of the first digital copy control information and the second digital copy control information described in the content copy control descriptor do not match may be considered. In the above situation, the broadcast receiving apparatus 100 of this embodiment may perform the following operations.

[0337] First, the first operation example is a method of performing control so as to operate based on the copy generation control indicated by the first digital copy control information when the descriptions of the first digital copy control information and the second digital copy control information do not match. In this case, simple copy generation control common to each component constituting the same content becomes possible.

[0338] Next, in the second operation example, when the descriptions of the first digital copy control information and the second digital copy control information do not match, control is performed to operate based on the copy generation control indicated in the second digital copy control information. In this case, even for components that make up the same content, different copy generation controls can be applied for each component, that is, more refined copy generation control becomes possible.

[0339] Furthermore, in the third operation example, when the descriptions of the first digital copy control information and the second digital copy control information do not match, control is performed to operate based on the digital copy control information with the stricter conditions among the two different digital copy control information. For example, when one is 'Copyable without limit' and the other is 'Copyable only once', the information 'Copyable only once' is followed. Or, when one is 'Copyable a predetermined number of times' and the other is 'Copy prohibited', the information 'Copy prohibited' is followed. Or, when both are 'Copyable a predetermined number of times', the information with the smaller specified number of copyable times is followed. In this case, more precise copy generation control becomes possible.

[0340] By performing the above processing, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to operate suitably even when two different digital copy control information are described in the content copy control descriptor.

[0341] <Exception Processing 2 for Content Copy Control> As described with reference to FIG. 7A, in the digital broadcast system corresponding to the broadcast receiving apparatus 100 of the present embodiment, due to the location information in the MPT (see FIG. 7C), data obtained through a different path (IPv4, IPv6, MPEG2-TS, URL, etc.) from the data obtained in the TLV stream of the broadcast path may be included in the same package and the same event as the data obtained in the TLV stream. Here, content protection when copy control information is included in the MPT or the like will be described.

[0342] First, when copy control information is included in MPT or the like, data that is in the same package and the same event according to the location information, even if it is data obtained through a different path (IPv4, IPv6, MPEG2-TS, URL, etc.) from the data obtained in the TLV stream of the broadcast path, may be controlled according to the copy control information included in the TLV stream. As the copy control state of the specified content by these copy control information, as described above, 'Copyable without restriction' (which may be divided into two types: 'Copyable without restriction and encryption processing required at the time of accumulation and output' and 'Copyable without restriction and encryption processing not required at the time of accumulation and output'), 'Copyable only once', 'Copyable a predetermined number of times' (for example, if it is copyable 9 times + movable 1 time, so-called 'Dubbing 10'), 'Copy prohibited', etc. may be specified.

[0343] Here, when the position of the data indicated by the location information includes MPEG2-TS data transmitted by another digital broadcast signal, the MPEG2-TS data is also broadcast in association with copy control information by another digital broadcast signal. Then, the problem becomes how to perform copy control of the MPEG2-TS data according to which information and how (according to the copy control information included in the TLV / MMT stream or the copy control information included in the MPEG2-TS).

[0344] In the digital broadcast system of this embodiment, as a solution to this problem, in the broadcast receiving apparatus 100, any of the following plurality of solutions may be operated.

[0345] <Operation Example 1> In the first operation example, when copy control information is included in MPT or the like, and the data in the same package and the same event according to the location information includes MPEG2-TS data transmitted by another digital broadcast signal, the copy control state indicated by the copy control information included in the TLV stream is preferentially controlled over the copy control state indicated by the copy control information included in the MPEG2-TS.

[0346] For example, if the copy control state indicated by the copy control information included in the TLV stream is "copyable for one generation" and the copy control state indicated by the copy control information included in the MPEG2-TS is "copyable a predetermined number of times", even if the data is obtained through a path different from that of the data obtained from the TLV stream (digital broadcast in the MPEG2-TS transmission format), copy control may be performed as content that is "copyable for one generation". For example, if the copy control state indicated by the copy control information included in the TLV stream is "unrestrictedly copyable" and the copy control state indicated by the copy control information included in the MPEG2-TS is "copyable a predetermined number of times", even if the data is obtained through a path different from that of the data obtained from the TLV stream (digital broadcast in the MPEG2-TS transmission format), copy control may be performed as content that is "unrestrictedly copyable".

[0347] In this operation case, for the data obtained through a path other than the TLV stream, it is possible to set the copy state to be managed in the broadcast receiving apparatus 100 of the present embodiment in the corresponding broadcast system.

[0348] <Operation Example 2> In the second operation example, when the copy control information is included in MPT or the like and the data of MPEG2-TS transmitted by another digital broadcast signal is included in the data in the same package and the same event in terms of location information, the copy control state indicated by the copy control information included in the TLV stream is compared with the copy control state indicated by the copy control information included in the MPEG2-TS. When the copy control state indicated by the copy control information included in the MPEG2-TS is stricter than the copy control state indicated by the copy control information included in the TLV stream, when performing the storage process to the storage (accumulation) unit 110, the recording process to the removable recording medium, or the output process from the digital interface, the data of the MPEG2-TS is excluded from the content to be processed and operates accordingly.

[0349] In this operation, for data obtained through a path other than the TLV stream, it is possible to eliminate the duplication of the copy control state on the broadcast receiver 100 of this embodiment while respecting the original copy control information set in the broadcast system that transmits the data.

[0350] Also, as a result of the comparison, when the copy control state indicated by the copy control information included in the MPEG2-TS is the same state as or a looser copy control state than the copy control state indicated by the copy control information included in the TLV stream, for the data of the MPEG2-TS included in the same package and the same event with the location information, copy control may be performed as the content with the copy control state indicated by the copy control information included in the TLV stream.

[0351] In this operation, for data obtained through a path other than the TLV stream, it is possible to eliminate the duplication of the copy control state on the broadcast receiver 100 of this embodiment while respecting the original copy control information set in the broadcast system that transmits the data.

[0352] In the above description, the copyright protection function of the broadcast receiver 100 of this embodiment has been described as being performed based on the copy control information included in the MPT. However, the table for arranging the copy control information is not limited to the MPT. In addition to the MPT, it may be arranged and transmitted in the MH-Service Description Table (MH-SDT) or MH-Event Information Table (MH-EIT) described in FIG. 6B, or other tables, and the broadcast receiver 100 may perform copyright protection processing according to these.

[0353] According to the embodiment described above, it is possible to provide a broadcast receiver corresponding to MMT digital broadcasting.

[0354] (Embodiment 2) Hereinafter, Example 2 of the present invention will be described. Note that the configurations, processes, effects, etc. in this example are the same as those in Example 1 unless otherwise specified. For this reason, hereinafter, the differences between this example and Example 1 will be mainly described, and the common points will be omitted as much as possible to avoid duplication. Also, the broadcast receiving apparatus of this example is a television receiver that supports both the MMT method and the MPEG2-TS method as a media transport method, and the description will be given below.

[0355] [Hardware Configuration of Broadcast Receiving Apparatus] FIG. 24 is a block diagram showing an example of the 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 / demodulation unit 832, an MMT decoding processing unit 841, an MPEG2-TS decoding processing unit 842, a video synthesis unit 861, a monitor unit 862, a video output unit 863, an audio synthesis unit 864, a speaker unit 865, an audio output unit 866, and an operation input unit 870.

[0356] The main control unit 801, the system bus 802, the ROM 803, the RAM 804, the storage unit 810, the expansion interface unit 824, the digital interface unit 825, the monitor unit 862, the video output unit 863, the speaker unit 865, the audio output unit 866, the operation input unit 870, etc. have the same functions as the main control unit 101, the system bus 102, the ROM 103, the RAM 104, the storage (accumulation) unit 110, the expansion interface unit 124, the digital interface unit 125, the monitor unit 162, the video output unit 163, the speaker unit 165, the audio output unit 166, the operation input unit 170, etc. in the broadcast receiving apparatus 100 of Example 1, respectively, and detailed descriptions thereof are omitted.

[0357] The first tuner / demodulator unit 831 receives the broadcast wave of the broadcast service that adopts MMT as the media transport method via an antenna (not shown), and tunes (selects a channel) to the channel of the service desired by the user based on the control of the main control unit 801. Further, the first tuner / demodulator unit 831 demodulates the received broadcast signal to obtain an MMT data sequence, and outputs it to the MMT decoding processing unit 841. The second tuner / demodulator unit 832 receives the broadcast wave of the broadcast service that adopts MPEG2-TS as the media transport method via an antenna (not shown), and tunes (selects a channel) to the channel of the service desired by the user based on the control of the main control unit 801. Further, the second tuner / demodulator unit 832 demodulates the received broadcast signal to obtain an MPEG2-TS data sequence, and outputs it to the MPEG2-TS decoding processing unit 842.

[0358] The MMT decoding processing unit 841 inputs the MMT data sequence output from the first tuner / demodulator unit 831, and performs separation processing and decoding processing, etc. on the video data sequence, audio data sequence, character super data sequence, subtitle data sequence, etc., which are real-time presentation elements, based on the control signal included in the MMT data sequence. The MMT decoding processing unit 841 is assumed to have functions corresponding to those of the separation unit 132, video decoder 141, video color gamut conversion unit 142, audio decoder 143, character super decoder 144, subtitle decoder 145, subtitle synthesizing unit 146, subtitle color gamut conversion unit 147, data decoder 151, cache unit 152, application control unit 153, browser unit 154, application color gamut conversion unit 155, sound source unit 156, etc. in the broadcast receiving apparatus 100 of the first embodiment. The MMT decoding processing unit 841 can perform various processes described in the first embodiment. Since the details of the various processes are as described in the first embodiment, the description is omitted.

[0359] The MPEG2-TS decoding processing unit 842 inputs the MPEG2-TS data stream output from the second tuner / demodulation unit 832, and performs separation processing such as a video data stream, an audio data stream, a character super data stream, a subtitle data stream, etc., which are real-time presentation elements, and decoding processing based on the control signal included in the MPEG2-TS data stream. The MPEG2-TS decoding processing unit 842 is assumed to have the same function as the IRD (Integrated Receiver Decoder) unit of a conventional television receiver that receives a broadcast wave of a broadcast service adopting MPEG2-TS as a media transport method, and detailed description thereof is omitted.

[0360] The video composition unit 861 inputs the video information, subtitle information, and application information output from the MMT decoding processing unit 841 and the video information, subtitle information, and application information output from the MPEG2-TS decoding processing unit 842, and performs processing such as appropriate selection and / or superimposition. The video composition unit 861 includes a video RAM (not shown), and the monitor unit 862 etc. are driven based on the video information etc. input to the video RAM. Also, the video composition unit 861 performs scaling processing, superimposition processing of EPG screen information, etc. as necessary based on the control of the main control unit 801. The audio composition unit 164 inputs the audio information output from the MMT decoding processing unit 841 and the audio information output from the MPEG2-TS decoding processing unit 842, and performs processing such as appropriate selection and / or mixing.

[0361] The LAN communication unit 821 is connected to the Internet 200 via the router device 200r, and transmits and receives data with each server device and other communication devices on the Internet 200. Also, it acquires the MMT data stream (or a part thereof) or the MPEG2-TS data stream (or a part thereof) of a program transmitted via a communication line, and outputs it to the MMT decoding processing unit 841 or the MPEG2-TS decoding processing unit 842 as appropriate.

[0362] [Time display of the broadcast receiving device] In the broadcast receiving apparatus 800 of this embodiment, it is assumed that the current date and the current time can be displayed on an EPG screen, various setting screens, and the like. Information regarding the current date and the current time is transmitted by MH-TOT or the like in a broadcast service that employs MMT as a media transport method, and is transmitted by a TOT (Time Offset Table) included in SI (Service Information) defined in the MPEG-2 system in a broadcast service that employs MPEG2-TS as a media transport method. The broadcast receiving apparatus 800 can acquire information regarding the current date and the current time by referring to the MH-TOT and the TOT.

[0363] Also, generally, when the video composition unit 861 mainly selects video information and the like output from the MMT decoding processing unit 841, information regarding the current date and the current time acquired from the MH-TOT is superimposed on the video information and the like, and when the video composition unit 861 mainly selects video information and the like output from the MPEG2-TS decoding processing unit 842, control may be performed so that information regarding the current date and the current time acquired from the TOT is superimposed on the video information and the like.

[0364] However, there are differences in encoding / decoding processes and transmission paths between a broadcast service that adopts MMT as a media transport method and a broadcast service that adopts MPEG2-TS as a media transport method. Therefore, especially in the display of the current time, there may be inconsistencies when selecting a broadcast service that adopts MMT as a media transport method and when selecting a broadcast service that adopts MPEG2-TS as a media transport method. For example, as shown in FIG. 25, when switching the screen display from the EPG screen 162g that displays the channel information of a broadcast service that adopts MMT as a media transport method to the EPG screen 162h that displays the channel information of a broadcast service that adopts MPEG2-TS as a media transport method, the display of the current time switches from the current time display 162g1 to the current time display 162h1, which may give the user a visual discomfort due to the inconsistency.

[0365] In the broadcast receiving apparatus 800 of the present embodiment, in order to prevent the user from experiencing visual discomfort, even when the video composition unit 861 mainly selects the video information and the like output from the MMT decoding unit 841, control is performed so that the information regarding 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 that the current time information provided by a broadcast service that adopts MPEG2-TS as a media transport method is superimposed on the content of a broadcast service that adopts MMT as a media transport method.

[0366] By performing the above 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 adopts MMT as a media transport method and a broadcast service that adopts MPEG2-TS as a media transport method, it is possible to prevent the user from experiencing visual discomfort due to the inconsistency in the display of the current time.

[0367] Note that FIG. 26A shows an example of the selection control of the current time information reference source according to the reception status of each broadcast service in the broadcast receiving apparatus 800 of the present embodiment. In the broadcast receiving apparatus 800 of the present embodiment, when the reception of a broadcast service that employs MPEG2-TS as the media transport method is possible, the TOT is always referred to obtain the current time information. When the reception of a broadcast service that employs MPEG2-TS as the media transport method is not possible and the reception of a broadcast service that employs MMT as the media transport method is possible, the control is performed such that the MH-TOT is referred to obtain the current time information.

[0368] Conversely, even if the control is performed such that the current time information provided by a broadcast service that employs MMT as the media transport method is superimposed on the content of a broadcast service that employs MPEG2-TS as the media transport method, the same effect as described above can be obtained.

[0369] Note that, as described above, in either the case where the control is performed such that the current time information provided by a broadcast service that employs MPEG2-TS as the media transport method is superimposed on the content of a broadcast service that employs MMT as the media transport method, or the case where the control is performed such that the current time information provided by a broadcast service that employs MMT as the media transport method is superimposed on the content of a broadcast service that employs MPEG2-TS as the media transport method, similar to the description in [Time Management of Broadcast Receiving Apparatus] of Embodiment 1, it is possible to correct the current time information by referring to the 'delta' parameter of the time information in the TMCC extension information area.

[0370] Also, in either the case of a broadcast service that adopts MMT as a media transport method or a broadcast service that adopts MPEG2-TS as a media transport method, MH-TOT or TOT transmitted by each broadcast service that constitutes the network may have errors due to malfunctions of the transmission-side system, transmission errors, or the like. In the broadcast receiver 800 of this embodiment, as a countermeasure against the errors of the MH-TOT or TOT, when it is determined that the MH-TOT or TOT acquired from the service being received has an error, the MH-TOT or TOT is acquired from another broadcast service on the same network or from an arbitrary broadcast service on another network, and the time information of the built-in clock is updated by referring to the current time information.

[0371] FIG. 26B shows an example of the update process of the current time information when receiving a broadcast service that adopts MPEG2-TS as a media transport method in the broadcast receiver 800 of this embodiment. Note that even when receiving a broadcast service that adopts MMT as a media transport method, the same process as the process shown in this figure is possible.

[0372] When updating the time information of the built-in clock in the broadcast receiver 800 of this embodiment, first, the reception function execution unit 1102 acquires TOT from the MPEG2-TS data stream of the currently received broadcast service (a broadcast service that adopts MPEG2-TS as a media transport method) (S301), and further acquires the current time information by referring to the acquired TOT (S302). Next, the reception function execution unit 1102 performs a process of comparing the current time information acquired in the process of S302 with the time information of the built-in clock.

[0373] As a result of the comparison process, if the difference between the current time information obtained in the process of S302 and the time information of the built-in clock is within a predetermined value (for example, within 3 minutes) (S303: Yes), the reception function execution unit 1102 updates the time information of the built-in clock using the current time information obtained in the process of S302 (S306). On the other hand, as a result of the comparison process, if the difference between the current time information obtained in the process of S302 and the time information of the built-in clock is not within the predetermined value (S303: No), or if the TOT obtained in S301 has a flag or the like indicating an error in the data, the reception function execution unit 1102 obtains the TOT from the MPEG2-TS data stream of another broadcast service in the same network, or obtains the MH-TOT from the MMT data stream of an arbitrary broadcast service (a broadcast service adopting MMT as the media transport method) of another network (S304), and further obtains the current time information from the obtained TOT or MH-TOT (S305). The reception function execution unit 1102 may perform the comparison process of S303 again using the current time information obtained in the process of S305.

[0374] Through the above processing, when the broadcast receiving apparatus 800 of the present embodiment determines that the MH-TOT or TOT obtained from the service being received has an error, it can update the time information of the built-in clock by obtaining the MH-TOT or TOT from another broadcast service in the same network or from an arbitrary broadcast service in another network and referring to the current time information.

[0375] Note that when the current time information whose difference from the time information of the built-in clock is within a predetermined range cannot be obtained by repeating the processes of S304 to S305, for example, at the initial setting after factory shipment, the time information of the built-in clock may be newly set using the current time information obtained in the process of S302. By doing so, it is possible to cope with the case where there is an error in the time information side of the built-in clock of the broadcast receiving apparatus 800 of the present embodiment.

[0376] [EPG Display of Broadcast Receiver] Event schedule information of a broadcast service that employs MMT as a media transport method is transmitted by MH-EIT or the like. On the other hand, event schedule information of a broadcast service that employs MPEG2-TS as a media transport method is transmitted by EIT (Event Information Table) included in SI defined in the MPEG-2 system. Therefore, generally, 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 can be acquired, and when displaying video information or the like provided by a broadcast service that employs MPEG2-TS as a media transport method, event schedule information (EIT) of the broadcast service that employs MPEG2-TS can be acquired.

[0377] However, the broadcast receiver 800 according to this embodiment can acquire both the MH-EIT and the EIT, whether when displaying video information or the like provided by a broadcast service that employs MMT as a media transport method, or when displaying video information or the like provided by a broadcast service that employs MPEG2-TS as a media transport method, thus improving the usability for the user.

[0378] FIG. 27A shows an example of an EPG screen in the broadcast receiving apparatus 800 of the present embodiment. In the figure, the EPG screen 162i is an EPG screen created based on the MH-EIT of a broadcast service that employs MMT as a media transport method. Assume that “M1 TV,” “M2 Broadcast,” “M3 Channel,” “M4 TV,” “TV M5,” etc. are the names of broadcast stations of broadcast services that employ MMT as a media transport method, respectively. Also, 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 method. Assume that “T6 TV,” “T7 Broadcast,” “T8 Channel,” “T9 TV,” “TV TA,” etc. are the names of broadcast stations of broadcast services that employ MPEG2-TS as a media transport method, respectively.

[0379] For example, while the user is viewing a broadcast program provided by a broadcast service that employs MMT as a media transport method, if the user operates a remote control (not shown) to instruct the display of the EPG screen, an initial screen of the EPG screen (not shown) is displayed. The initial screen of the EPG screen is an EPG screen created based on the MH-EIT of a broadcast service that employs MMT as a media transport method, and detailed information on the broadcast programs of each channel from “17:00 (current time neighborhood)” on “October 7, 2014 (today)” is displayed. Next, if the user desires to check the detailed information on the broadcast programs of each channel from “20:00” on “October 9, 2014” and operates a remote control (not shown) to instruct the update of the EPG screen, the EPG screen 162i is displayed.

[0380] Furthermore, when the user desires to check the detailed information of a broadcast program provided in a broadcast service that adopts MPEG2-TS as the media transport method and operates a remote control (not shown) to instruct network switching, the EPG screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of the present embodiment, instead of the initial screen of the EPG screen created based on the EIT of the broadcast service that adopts MPEG2-TS as the media transport method (that is, the detailed information of the broadcast programs of each channel from '17:00' on 'October 7, 2014'), the detailed information of the broadcast programs of each channel in the same date and time zone as the immediately preceding EPG screen 162i (that is, from '20:00' on 'October 9, 2014') is displayed under control.

[0381] By the above-described control, the user can continuously check, with a simple operation, the detailed information regarding the broadcast programs in the same date and time zone of a plurality of networks with different media transport methods. That is, the usability of the broadcast receiving apparatus 800 is improved.

[0382] FIG. 27B is a diagram showing an example different from the above of the EPG screen in the broadcast receiving apparatus 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 (horizontal direction) by operating a remote control (not shown). That is, in the example shown in FIG. 27B, by scrolling the EPG screen in the channel direction (horizontal direction), the channel information created based on the MH-EIT of the broadcast service that adopts MMT as the media transport method and the channel information created based on the EIT of the broadcast service that adopts MPEG2-TS as the media transport method are seamlessly displayed on the same time axis.

[0383] Therefore, even when a user desires to check channel information created based on the EIT of a broadcast service adopting MPEG2-TS as a media transport method during the check of channel information created based on the MH-EIT of a broadcast service adopting MMT as a media transport method, it is possible to eliminate the need for instructions to switch the network by operating a remote controller (not shown). Furthermore, the user can simultaneously check detailed information regarding broadcast programs in the same time zone on the same day for a plurality of networks with different media transport methods. That is, the usability of the broadcast receiving apparatus 800 is improved.

[0384] (Example 3) Hereinafter, Example 3 of the present invention will be described. Note that the configuration, processing, effects, etc. in this example are the same as those in Example 1 unless otherwise specified. For this reason, hereinafter, the differences between this example and Example 1 will be mainly described, and the description of the common points will be omitted as much as possible to avoid duplication.

[0385] FIG. 28A shows an overview of the transmission of a time-directional hierarchical coded HEVC bitstream in the broadcast system of this example. When configuring a package, it is assumed that the HEVC time-directional sub-bitstream for 60 Hz decoding and display and the subset for 120 Hz decoding and display can be separate assets. In the figure, as an example, the former is referred to as 'Asset 1' and the latter as 'Asset 2'. Since they are separate assets, the access units of Asset 1 and Asset 2 may be transmitted in MMTP packets with different packet IDs.

[0386] Also, the MPU including the access units of the 120Hz decoding display subset shall be assigned the same MPU sequence number as the MPU including the access units of the 60Hz decoding sub-bitstream of the GOP to which those access units belong. By assigning the same MPU sequence number to the temporally related MPUs, it is assumed that the receiving terminal (such as the broadcast receiving apparatus 100 in this embodiment) can identify that these assets include access units belonging to the same GOP. Also, in the example shown in the figure, Asset 2 depends on Asset 1 for decoding. Therefore, a dependency descriptor is inserted into the descriptor area describing the information of Asset 2 in the MP table (MPT), and the asset ID of Asset 1 is described as the dependency destination. FIG. 28B shows an example of the data structure of the dependency descriptor. Also, an MPU time stamp descriptor and an MPU extended time stamp descriptor shall be added to both Asset 1 and Asset 2.

[0387] Note that in the above example, Asset 2 is the hierarchical data for improving the frame frequency of the content from 60Hz to 120Hz. However, Asset 2 may be prepared as hierarchical data for improving the resolution (for example, improving from 3840 pixels × 2160 pixels to 7680 pixels × 4320 pixels, etc.) or hierarchical data for improving the bit depth (for example, improving from 8 bits per pixel to 12 bits per pixel, etc.). Also, in this case, different encoding methods may be used for the content.

[0388] The network through which Asset 1 and Asset 2 are transmitted and the packet ID can be shown for each asset according to the location information in the MP table. That is, as described with reference to FIG. 7A, Asset 1 may be transmitted via a broadcast transmission path and Asset 2 may be distributed via a communication line. Both Asset 1 and Asset 2 may be transmitted via a broadcast transmission path or distributed via a communication line. Further, in this embodiment, Asset 1 transmitted via the broadcast transmission path is provided free of charge, and Asset 2 distributed via the communication line is provided for a fee. That is, the 60 Hz video information reproduced using only the 60 Hz decoding sub-bitstream of Asset 1 can be viewed free of charge, while the 120 Hz video information reproduced using also the 120 Hz decoding display subset of Asset 2 requires a charge for viewing.

[0389] Hereinafter, an example of the operation of the broadcast receiving apparatus 100 when receiving the broadcast service as described above will be described.

[0390] [Billing Information Registration Process] The broadcast receiving apparatus 100 of this embodiment is capable of storing, in a personal information storage area (not shown) of the storage unit 110 or the like, a credit card number or the like necessary for billing processing or the like when receiving paid content.

[0391] FIG. 29A is a diagram showing an example of a personal information registration screen of the broadcast receiving apparatus 100 of this embodiment. The personal information registration screen 162m is composed of a credit card information registration area 162m1, a prepaid card information registration area 162m2, and a mobile terminal authentication process setting area 162m3. Either one of the credit card information registration area 162m1 and the prepaid card information registration area 162m2 may be used.

[0392] Credit card information and the like can be input into the credit card information registration area 162m1 by using a remote control or the like (not shown), and can be stored in the personal information storage area of the storage unit 110 by selecting the "Register" icon. Prepaid card information and the like can be input into the prepaid card information registration area 162m2 by using a remote control or the like (not shown), and can be stored in the personal information storage area of the storage unit 110 by selecting the "Input" icon. It is desirable to encrypt the credit card information and the like and the prepaid card information and the like and store them in the personal information storage area of the storage unit 110. Alternatively, the personal information storage area of the storage unit 110 may be set as an encrypted area. The encryption may be performed using a known technique.

[0393] In the mobile terminal authentication process setting area 162m3, when it is selected not to perform authentication by the mobile terminal, it is assumed that the credit card information and the like and the prepaid card information and the like may be automatically used when viewing paid content on the broadcast receiving device 100 that stores these information. However, in the settings such as the menu, the setting of whether to permit charging for paid content may be preferentially followed. On the other hand, when it is selected to perform authentication by the mobile terminal, even if charging for paid content is permitted in the settings such as the menu, it is not permitted to use the credit card information and the like and the prepaid card information and the like without being based on the authentication process by the pre-registered mobile information terminal.

[0394]

[0395] ​When it is selected to "perform" the authentication by the portable terminal, the "Terminal Registration" icon is enabled. Further, if the portable information terminal used for the authentication process has been registered, terminal identification information capable of identifying the registered portable information terminal is displayed. The terminal identification information may be an IP address, a MAC (Media Access Control) address, etc., or may be the model and serial number of the portable information terminal, a nickname arbitrarily specified by the user, etc. In addition, as long as it is information capable of uniquely identifying the portable information terminal, it may be different from the above.

[0396] Note that it is desirable that the display of the personal information registration screen 162m be protected by a password or the like. That is, it is preferable not to be able to execute the input, registration, and change, etc. of each information on the personal information registration screen 162m without inputting a password or the like. Only the display may be possible without inputting a password or the like, but it is desirable to display credit card information, etc. in masked form.

[0397] FIG. 29B shows an example of an operation sequence of a process of registering a portable information terminal used for an authentication process in the broadcast receiving apparatus 100 of the present embodiment. The registration process is started by selecting the "Terminal Registration" icon on the personal information registration screen 162m. Note that if a portable information terminal already used for the authentication process has been registered, the information may be updated.

[0398] When the "Terminal Registration" icon is selected, the cooperation function execution unit 1103 of the broadcast receiving apparatus 100 first searches for a portable information terminal capable of communicating with the broadcast receiving apparatus 100 on the network (S401), and displays a list of the search results (S402). Note that the network may be a local area network such as inside a house, rather than a wide area network such as the Internet 200. When the user selects the portable information terminal 700 used for the authentication process from the list display using a remote control or the like (not shown) (S403), the cooperation function execution unit 1103 transmits a request for permission to use for authentication to the selected portable information terminal 700 (S404).

[0399] The mobile information terminal 700 displays a notification (such as an icon or a message) indicating that the authentication use permission request has been received on the display unit 741 (S405). The user (who may be the same person as the user who selected the mobile information terminal in the process of S403) may reject the notification displayed in the process of S405 (S407) or ignore the notification if the user does not want to register the mobile information terminal 700 as the mobile information terminal to be used for the authentication process (S406: No). On the other hand, if it is possible to register the mobile information terminal 700 as the mobile information terminal to be used for the authentication process (S406: Yes), a permission response is made to the notification (S408).

[0400] FIG. 29C shows an example of the display screen of the notification displayed in the process of S405. FIG. (A) of the same figure is an example in the case where the notification indicating that the authentication use permission request has been received is made by an icon. If it is possible to register the mobile information terminal 700 as the mobile information terminal to be used for the authentication process, the user may tap the icon. If the user does not want to register the mobile information terminal 700 as the mobile information terminal to be used for the authentication process, the user may flick the icon to pop it out of the screen or ignore the icon. FIG. (B) of the same figure is an example in the case where the notification indicating that the authentication use permission request has been received is made by a message. If it is possible to register the mobile information terminal 700 as the mobile information terminal to be used for the authentication process, the user may tap 'Permit' in the message. If the user does not want to register the mobile information terminal 700 as the mobile information terminal to be used for the authentication process, the user may tap 'Reject' in the message or ignore the message.

[0401] Return to the description of the operation sequence of FIG. 29B. When the broadcast receiving apparatus 100 receives a rejection response from the portable information terminal 700 or does not receive any response within a predetermined time (S409: Yes), it determines that it is not possible to use the portable information terminal 700 for the authentication process, and sends a cancellation notice of the authentication use permission request to the portable information terminal 700 (S410). Note that it is not always necessary to send the cancellation notice of the authentication use permission request. Further, the broadcast receiving apparatus 100 displays, on the monitor unit 162, a display for allowing the user to determine whether to cancel the registration process of the portable information terminal used for the authentication process. When the user selects to cancel the process (S411: Yes), the registration process of the portable information terminal used for the authentication process is cancelled. On the other hand, when the user does not select to cancel the process (S411: No), the process returns to S402 to redisplay the search results of the portable information terminal in a list again.

[0402] Further, when the broadcast receiving apparatus 100 receives a permission response from the portable information terminal 700 (S409: No), it determines that it is possible to use the portable information terminal 700 for the authentication process. Next, it sends an authentication information transmission request to the portable information terminal 700 (S412).

[0403] The portable information terminal 700 that has received the authentication information transmission request displays an authentication information input screen on the display unit 741 (S413) to prompt the user to input authentication information. FIG. 29D shows an example of the authentication information input screen 741c. When the user inputs authentication information such as a password used for the authentication process into the authentication information input screen (S414), the portable information terminal 700 stores the input authentication information in the authentication information storage area 7300 of the storage unit 710 in association with device identification information that can identify the broadcast receiving apparatus 100. The device identification information may be the one transmitted from the broadcast receiving apparatus 100 in the process of S404 or S412. Further, the portable information terminal 700 transmits the input authentication information to the broadcast receiving apparatus 100 together with terminal identification information that can identify the portable information terminal 700 (S416).

[0404] When receiving the authentication information and terminal identification information transmitted from the mobile information terminal 700 in the process of S416, the broadcast receiving apparatus 100 stores the received authentication information and terminal identification information in the authentication information storage area 1300 of the storage unit 110 or the personal information storage area in association with the credit card information input in the credit card information registration area 162m1 of the personal information registration screen 162m, the prepaid card information input in the prepaid card information storage area 162m2, etc. (S417). Further, the credit card information and prepaid card information stored in the personal information storage area may be encrypted using the authentication information and terminal identification information received in the process of S416. Note that the terminal identification information capable of identifying the mobile information terminal 700 is appropriately displayed in the mobile terminal authentication process setting area 162m3.

[0405] Through the above processing, in the broadcast receiving apparatus 100 of the present embodiment, it becomes possible to register a mobile information terminal used for the authentication process of charging for paid content.

[0406] [Receiving Process 1 of Paid Content] FIG. 30A shows an example of an operation sequence of a charging process when receiving video content including paid data.

[0407] When the user operates a remote control or the like (not shown) to instruct channel switching, first, the same processing as S201 to S216 in FIG. 14A is executed (S501). Next, the reception function execution unit 1102 of the broadcast receiving apparatus 100 refers to various control information such as MMT-SI to confirm whether the content of the channel desired by the user to view is paid content (S502). Note that the paid content may be either a case where a part of the assets constituting the content is provided for a fee or a case where all the assets are provided for a fee as described with reference to FIG. 28A.

[0408] When the content includes assets for which the content of the channel desired by the user to view is provided on a paid basis (S502: Yes), the associated function execution unit 1103 of the broadcast receiving apparatus 100 transmits a charging permission request to the portable information terminal 700 together with device identification information that can identify the broadcast receiving apparatus 100 (S511). Program identification information such as the program name of the content may be further transmitted. Note that the portable information terminal 700 that is the transmission destination of the charging permission request may be the portable information terminal registered in the portable terminal authentication process setting area 162m3 of the personal information registration screen 162m. Further, the charging permission request may be transmitted only when the portable information terminal 700 is in a state where it can communicate with the broadcast receiving apparatus 100. When the portable information terminal 700 is not in a state where it can communicate with the broadcast receiving apparatus 100, the same processing as when charging for the paid content is not permitted, which will be described later, may be performed.

[0409] The portable information terminal 700 that has received the charging permission request displays a charging permission screen on the display unit 741 (S512), and prompts the user to determine whether to permit charging for the paid content. FIG. 30B shows an example of the charging permission screen 741d. The device identification information transmitted in S511 and program identification information such as the program name of the content (however, not shown in the figure) and a confirmation message 741d1 may be displayed on the charging permission screen 741d.

[0410] When permitting charging for the paid content, the user may input authentication information such as the password stored in the processes of S414 to S415 in FIG. 29B on the charging permission screen 741d and then tap "Permit". When not permitting charging for the paid content, the user may tap "Deny" without inputting the authentication information such as the password. When the user taps "Deny" (S513: No), the portable information terminal 700 transmits a charging rejection response to the broadcast receiving apparatus 100 (S514). On the other hand, when the user taps "Permit" (S513: Yes), the portable information terminal 700 transmits the authentication information such as the password input on the charging permission screen 741d and terminal identification information that can identify the portable information terminal 700 to the broadcast receiving apparatus 100 as a charging permission response (S515).

[0411] When receiving the charging permission response from the portable information terminal 700, next, the broadcast receiving apparatus 100 compares the authentication information and the terminal identification information included in the received charging permission response with the authentication information and the terminal identification information stored in the authentication information storage area 1300 of the storage unit 110 or the personal information storage area (S516). In the process of S516, when the authentication information and the terminal identification information included in the charging permission response received in the process of S515 match the authentication information and the terminal identification information stored in the authentication information storage area 1300 of the storage unit 110 or the personal information storage area, it is determined that the charging for the paid content has been permitted by the user of the portable information terminal 700. On the other hand, when they do not match, it is determined that the charging for the paid content has not been permitted.

[0412] In the process of S516, when it is determined that the charging for the paid content has been permitted by the user of the portable information terminal 700 (S517: Yes), next, charging processing is performed based on the credit card information registered in the credit card information registration area 162m1 of FIG. 29A or the prepaid card information registered in the prepaid card information registration area 162m2. Further, the reception function execution unit 1102 of the broadcast receiving apparatus 100 acquires the paid assets of the content that the user desires to view, the presentation time information, the layout control information, etc. related to the paid assets (S518). Further, the free assets of the content that the user desires to view and the presentation time information, the layout control information, etc. related to the free assets are acquired (S591), and together with the paid assets and the like acquired in the process of S518, the decoding process (S592) and the presentation process (S593) of the MFU are performed. Note that the processes of S518 and S591 to S593 may be the same as the processes of S217 to S220 in FIG. 14A, and detailed description thereof is omitted. Note that when the content is composed only of assets provided for a fee, the process of S591 is unnecessary.

[0413] When the broadcast receiving apparatus 100 receives a charge rejection response from the portable information terminal 700 in the process of S514, or when it is determined in the process of S516 that the charge for the paid content has not been permitted by the user of the portable information terminal 700 (S517: No), the processes of S591 to S593 are performed without performing the process of S518. Note that, as described above, when the content of the channel that the user desires to view consists only of paid assets, the processes of S591 to S593 do not need to be performed either.

[0414] Also, when charging for paid content is not permitted in the settings such as the menu, or when the content of the channel that the user desires to view is content that does not include assets provided for a fee (S502: No), the process of S510 (that is, the series of processes of S511 to S518) surrounded by a dashed line in the figure may not be performed, and only the processes of S591 to S593 may be performed.

[0415] Note that the timing of performing the charging process based on the credit card information or prepaid card information may be after the process of S518 (acquisition of paid assets) or after the process of S593 (presentation of content including paid assets), in addition to the above. Further, the charging process may be performed not only based on the above-mentioned credit card information or prepaid card information, but also together with the collection of the basic viewing fee for digital broadcasting based on the contract number associated with the CAS of digital broadcasting.

[0416] Through the above processes, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to receive video content including paid data with an authentication process for charging.

[0417] In particular, in the above-described operation example, the user who gives a channel selection instruction in the process of S501 (the user of the broadcast receiving apparatus 100) and the user who determines whether or not to charge for the paid content in S513 (the user of the portable information terminal 700) may be different. That is, for example, when the user of the broadcast receiving apparatus 100 attempts to view paid content using the broadcast receiving apparatus 100, the user of the portable information terminal 700 can control whether or not to permit charging for the viewing of the paid content by the user of the broadcast receiving apparatus 100 while away from home. When making a viewing reservation for the paid content, the processes of S511 to S517 may be performed in advance. Further, similar effects can be obtained by replacing the viewing process in the above description with a recording process.

[0418] [Receiving Process 2 for Paid Content] FIG. 30C shows an example different from the above of the operation sequence of the charging process when receiving video content including paid data. The differences from the operation sequence described with reference to FIG. 30A will be mainly described, and the common points will be omitted as much as possible to avoid duplication.

[0419] When the user operates a remote control (not shown) or the like to instruct channel switching, first, the same processes as S201 to S216 in FIG. 14A are executed (S501). Next, the reception function execution unit 1102 of the broadcast receiving apparatus 100 refers to various control information such as MMT-SI to confirm whether or not the content of the channel desired by the user to view is paid content (S502).

[0420] When the content of the channel desired by the user to view is content including an asset provided for a fee (S502: Yes), the cooperation function execution unit 1103 of the broadcast receiving apparatus 100 transmits a charging permission request to the portable information terminal 700 together with device identification information capable of identifying the broadcast receiving apparatus 100 (S521).

[0421] Upon receiving the charging permission request, the mobile information terminal 700 compares the device identification information received in the process of S521 with the device identification information stored in the processes of S414 to S415 in FIG. 29B. If they do not match (S522: No), a charging rejection response is sent to the broadcast receiving device 100 (S523). On the other hand, if the device identification information received in the process of S521 matches the device identification information stored in the processes of S414 to S415 in FIG. 29B (S522: Yes), the mobile information terminal 700 further reads out authentication information such as a password stored in association with the device identification information in the processes of S414 to S415 in FIG. 29B from the authentication information storage area 7300 of the storage unit 710 (S524). Further, the mobile information terminal 700 transmits the authentication information read out in the process of S524 and the terminal identification information capable of identifying the mobile information terminal 700 to the broadcast receiving device 100 as a charging permission response (S525).

[0422] When receiving the charging permission response from the mobile information terminal 700, next, the broadcast receiving device 100 compares the authentication information and the terminal identification information included in the received charging permission response with the authentication information and the terminal identification information stored in the authentication information storage area 1300 or the personal information storage area of the storage unit 110 (S526) to determine whether the charging for the paid content is permitted by the user of the mobile information terminal 700. Thereafter, the processes of S527 to S528 and the processes of S591 to S593 are the same as the operation sequence described with reference to FIG. 30A, and thus the description is omitted.

[0423] Through the above processing, in the broadcast receiving device 100 of this embodiment, it is possible to receive video content including paid data with an authentication process for charging.

[0424] In the above-described operation sequence, when a user of the broadcast receiving apparatus 100 attempts to view paid content using the broadcast receiving apparatus 100, it is possible to automatically control whether or not to permit charging using the portable information terminal 700 without bothering the user of the portable information terminal 700. However, it is not preferable that the control of whether or not to permit the charging is automatically performed in all situations.

[0425] Therefore, when performing control according to the above-described operation sequence, it is desirable to enable the portable information terminal 700 to set whether or not to perform control of whether or not to permit the charging. For example, it may be possible to set to always return a charging rejection response when receiving a charging permission request by setting a menu or the like. The user of the portable information terminal 700 may enable the setting to always return a charging rejection response when receiving the charging permission request when going out, and disable the setting when at home. In this way, when a user of the broadcast receiving apparatus 100 attempts to view paid content using the broadcast receiving apparatus 100, if the user of the portable information terminal 700 is at home, viewing of the content can be permitted, and if the user is out, viewing can be prohibited. That is, charging for paid content can be permitted to be controlled only when it is possible for the user of the portable information terminal 700 to confirm what kind of program the user of the broadcast receiving apparatus 100 attempts to view while at home.

[0426] Also, for example, in the process of S521, the broadcast receiving apparatus 100 may transmit a charging permission request to the portable information terminal 700 only when the portable information terminal 700 is in a communicable state with the broadcast receiving apparatus 100 and the portable information terminal 700 and the broadcast receiving apparatus 100 are simultaneously present on the same local network. Note that the same local network may be determined by, for example, whether the IP address of the portable information terminal 700 and the IP address of the broadcast receiving apparatus 100 are within the same subnet. In this way, similar to the above, only when the user of the portable information terminal 700 is at home, when the user of the broadcast receiving apparatus 100 attempts to view paid content using the broadcast receiving apparatus 100, it is possible to control so that charging for the paid content can be permitted.

[0427] Also, for example, only when the portable information terminal 700 is within a predetermined position range, it may be possible to transmit a charging permission response to the charging permission request transmitted from the broadcast receiving apparatus 100, and when it is outside the position range, a charging rejection response may always be transmitted to the charging permission request transmitted from the broadcast receiving apparatus 100. The predetermined position range may be set around, for example, the home of the user of the portable information terminal 700, and a known technique using a GPS receiving unit 761 or the like may be used to confirm the position.

[0428] Also, for example, assume that the portable information terminal 700 can acquire the EPG of the broadcast service of this embodiment from the broadcast station server 300, the service provider server 400, etc. via the Internet 200, and using the acquired EPG, it is possible to set whether to send a charging permission response or a charging rejection response for the charging permission request sent from the broadcast receiving apparatus 100 on a per-program basis. That is, referring to the program identification information such as the program name of the content transmitted together with the charging permission request in the process of S521, if the content is a program set to send a charging rejection response according to the program identification information such as the program name, always send a charging rejection response, and if the content is a program set to be able to send a charging permission response, either a charging rejection response or a charging permission response may be sent based on the processes of S522 to S525 of the above operation sequence.

[0429] Also, as described above, when the portable information terminal 700 is in a communicable state with the broadcast receiving apparatus 100 and the portable information terminal 700 and the broadcast receiving apparatus 100 exist simultaneously on the same local area network, or when the portable information terminal 700 is within a predetermined position range, control based on the operation sequence shown in FIG. 30C may be performed, and in other cases, control based on the operation sequence shown in FIG. 30A may be performed.

[0430] According to the present embodiment described above, it is possible to provide a broadcast receiving apparatus with higher added value corresponding to MMT digital broadcasts.

[0431] (Embodiment 4) Hereinafter, Embodiment 4 of the present invention will be described. Note that the configuration, processing, effects, etc. in this embodiment are the same as those in Embodiment 1 unless otherwise specified. Therefore, hereinafter, the differences between this embodiment and Embodiment 1 will be mainly described, and the description of the common points will be omitted as much as possible to avoid duplication.

[0432] [Viewing Restriction Processing According to Viewer Age] FIG. 31A shows an example of the data structure of the MH - parental rate descriptor in the broadcast service of this embodiment.

[0433] In the figure, the 'country_code' parameter represents the country name using a three-letter alphabet code. The 'rating' parameter is the age restriction value, indicating the recommended minimum age of viewers for the content with this descriptor added. Figure 31B shows an example of the meaning of the value of the 'rating' parameter. The 'accompanying_flag' parameter is the accompanying flag, indicating that viewing may be permitted on the condition of accompaniment by a guardian even when the viewer's age is below the value specified by the 'rating' parameter. Figure 31C shows an example of the meaning of the value of the 'accompanying_flag' parameter. In the broadcast service of this embodiment, by using the MH-Parental Rating descriptor, it is possible to control the viewing restriction based on age for each content.

[0434] Note that, without using the 'accompanying_flag' parameter, the setting of whether viewing may be permitted on the condition of accompaniment by a guardian may be made only with the 'rating' parameter. In this case, for example, when the value of the 'rating' parameter is from '0x01' to '0x0F', it may be set to indicate the recommended minimum age of the viewer and not to perform control according to the accompaniment by a guardian. Also, when the value of the 'rating' parameter is from '0x11' to '0x1F', it may be set to indicate the recommended minimum age of the viewer and to perform control according to the accompaniment by a guardian. That is, the 4SB (The 4th Significant Bit) of the 'rating' parameter is used as an alternative to the 'accompanying_flag' parameter (accompanying flag). An example of the meaning of the value of the 'rating' parameter in the above case is shown in Figure 31D.

[0435] In the broadcast receiving apparatus 100 of the present embodiment, in order to implement the control of the viewing restriction, a viewing restriction setting menu is provided. Fig. 32 shows an example of the screen display diagram of the viewing restriction setting menu display screen 162n. In the viewing restriction setting menu 162n1, it is possible to control whether to perform the control of the viewing restriction by referring to the MH-Parental Rating Descriptor, and to set the viewing restriction age when performing the control of the viewing restriction. For the setting of the viewing restriction age, it is sufficient to set the age of the youngest user who mainly uses the broadcast receiving apparatus 100. For example, as shown in the figure, when "Viewing restriction" is set to "Yes" and "Viewing restriction age" is set to "15 years old", the broadcast receiving apparatus 100 of the present embodiment controls to restrict the viewing (display) of content whose "rating" parameter of the MH-Parental Rating Descriptor is in the range of "0x0D" to "0x0F".

[0436] Note that each piece of information in the viewing restriction setting menu 162n1 is preferably protected by a password or the like. That is, it is advisable not to allow the input, registration, and change, etc. of each piece of information in the viewing restriction setting menu 162n1 to be executed without performing authentication by inputting a password or the like.

[0437] Furthermore, in the broadcast receiving apparatus 100 of the present embodiment, by referring to the "accompanying_flag" parameter (accompanying flag) of the MH-Parental Rating Descriptor, it is possible to control the restriction of the viewing (display) of content according to the presence or absence of the accompaniment of a guardian. The details of the control of the restriction of the viewing (display) of content according to the presence or absence of the accompaniment of a guardian will be described below.

[0438] [Guardian information registration process] When controlling the restriction of content viewing (display) according to the presence or absence of the accompaniment of a guardian, in the broadcast receiving apparatus 100 of the present embodiment, it is assumed that the registration process of guardian information is performed in advance. FIG. 33A is a diagram showing an example of a guardian information registration screen of the broadcast receiving apparatus 100 of the present embodiment. The guardian information registration screen 162p is composed of guardian information registration areas 162p1 to 4. In the example shown in the figure, it is assumed that guardian information for four persons can be registered. It is also possible to register more guardian information, or the number of registrable guardian information may be less than that in the example of the figure.

[0439] In each of the guardian information registration areas 162p1 to 4, it is possible to register a portable information terminal owned by a person to be registered as a guardian, and if the portable information terminal has been registered, terminal identification information capable of identifying the registered portable information terminal is displayed. The terminal identification information may be an IP address, a MAC address, etc., or may be the model and serial number of the portable information terminal, a nickname arbitrarily specified by the user, etc. In addition, as long as it is information capable of uniquely identifying the portable information terminal, it may be different from the above.

[0440] When the user of the broadcast receiving apparatus 100 attempts to view content subject to age-based viewing restrictions using the broadcast receiving apparatus 100, it is assumed that authentication based on the accompaniment of a guardian for the viewing can be performed by any of the portable information terminals registered in the guardian information registration areas 162p1 to 4. When authentication based on the accompaniment of a guardian is performed, the user of the broadcast receiving apparatus 100 may be able to view the content even if the content to be viewed is subject to age-based viewing restrictions.

[0441] By selecting the 'Terminal Registration' icon in each of the guardian information registration areas 162p1 to 4, the registration process of guardian information (the registration process of terminal identification information capable of identifying the portable information terminal owned by the person to be registered as a guardian) is started. Note that the registration process may be the same as the operation sequence shown in FIG. 29B, and a detailed description thereof is omitted.

[0442] [Receiving Process of Content with Viewing Restriction] FIG. 33B shows an example of an operation sequence of controlling the restriction of viewing (display) of content according to whether or not a guardian is accompanying when receiving video content subject to viewing restriction.

[0443] When the user operates a remote controller (not shown) or the like to instruct channel switching, first, the same processing as S201 to S216 in FIG. 14A is executed (S601). Next, the receiver function execution unit 1102 of the broadcast receiving apparatus 100 refers to control information such as an MH-Parental Rate Descriptor and the setting value of the viewing restriction setting menu 162n1 to confirm whether the content of the channel that the user desires to view is content subject to viewing restriction (S602).

[0444] Note that, as described above, the content subject to viewing restriction is content having an MH-Parental Rate Descriptor in which the "rating" parameter is set to a value in the range of "0x0D" to "0x0F" when "Viewing Restriction" is set to "Yes" and "Viewing Restriction Age" is set to "15 years" in the viewing restriction setting menu 162n1. When the value of the "rating" parameter is in the range of "0x01" to "0x0C", etc., it is not content subject to viewing restriction. However, the combination of the set value of the "Viewing Restriction Age" and the value of the "rating" parameter may be changed as appropriate and is not limited to the above combination. Also, in the viewing restriction setting menu 162n1, when "Viewing Restriction" is set to "No", it is not content subject to viewing restriction regardless of the value of the "rating" parameter or the presence or absence of an MH-Parental Rate Descriptor. Also, in the case of content without an MH-Parental Rate Descriptor, it is not content subject to viewing restriction regardless of the setting of the viewing restriction setting menu 162n1. When the value of the "rating" parameter is "undefined" or the like, it is not necessary to regard it as content subject to viewing restriction.

[0445] In the process of S602, if it is confirmed that the content of the channel that the user desires to view is content subject to viewing restrictions (S602: Yes), the broadcast receiving apparatus 100 then checks the value of the accompanying flag (the 'accompanying_flag' parameter) of the MH-Parental Rate Descriptor related to the content of the channel that the user desires to view (S603). As shown in FIG. 31C, when the accompanying flag is set to '1', it indicates that the content associated with the MH-Parental Rate Descriptor having the accompanying flag is content for which control according to the accompaniment of a guardian is possible. When it is set to '0', it indicates that the content associated with the MH-Parental Rate Descriptor having the accompanying flag is content for which control according to the accompaniment of a guardian is not performed. If the MH-Parental Rate Descriptor associated with the content does not have an accompanying flag, the same processing as in the case of 'accompanying flag = 0' described later may be performed.

[0446] As a result of the accompanying flag check process of S603, when the value of the accompanying flag is set to '1' (S603: Yes), since the content of the channel that the user desires to view is content for which control according to the accompaniment of a guardian is possible, next, an authentication process for content viewing by the guardian is performed.

[0447] In the authentication process for content viewing by the guardian, first, the cooperation function execution unit 1103 of the broadcast receiving apparatus 100 transmits a viewing permission request to the portable information terminal 700 together with device identification information that can identify the broadcast receiving apparatus 100 (S604). Note that the portable information terminal 700 that is the transmission destination of the viewing permission request may be each portable information terminal registered in the guardian information registration areas 162p1 to 162p4 of the guardian information registration screen 162p. The viewing permission request may be transmitted to all the portable information terminals registered in the guardian information registration areas 162p1 to 162p4 of the guardian information registration screen 162p, or may be transmitted only to one selected portable information terminal.

[0448] Also, the viewing permission request may be transmitted only when the mobile information terminal 700 is in a communicable state with the broadcast receiving apparatus 100 and both the mobile information terminal 700 and the broadcast receiving apparatus 100 are simultaneously present on the same local network. Note that the same local network may be determined by whether the IP address of the mobile information terminal 700 and the IP address of the broadcast receiving apparatus 100 are within the same subnet, or the like. Alternatively, the request may be transmitted only when the mobile information terminal 700 is within a predetermined position range. The predetermined position range may be set around the home of the user of the mobile information terminal 700 or the installation location of the broadcast receiving apparatus 100, etc. as a rough center, and a known technique using a GPS receiving unit 761 or the like may be used to confirm the position. That is, the viewing permission request may be transmitted only when it can be confirmed that the user of the mobile information terminal 700 is in a position where he / she can accompany the user who attempts to view the content subject to the viewing restriction using the broadcast receiving apparatus 100.

[0449] Note that when the mobile information terminal 700 is not in a communicable state with the broadcast receiving apparatus 100 or when the mobile information terminal 700 is not within the predetermined position range, the same processing as when the display of the content subject to the viewing restriction described later is not permitted may be performed. Also, in this embodiment, the mobile information terminal 700 may periodically transmit position information to the broadcast receiving apparatus 100.

[0450] Upon receiving the viewing permission request, the mobile information terminal 700 compares the device identification information received in the process of S604 with the device identification information stored during the registration process of the guardian information. If they do not match (S605: No), it sends a display rejection response to the broadcast receiving device 100 (S606). On the other hand, if the device identification information received in the process of S604 matches the device identification information stored during the registration process of the guardian information (S605: Yes), the mobile information terminal 700 further reads out authentication information such as a password stored in association with the device identification information during the registration process of the guardian information from the authentication information storage area 7300 of the storage unit 710 (S607). Furthermore, the mobile information terminal 700 transmits the authentication information read out in the process of S607 and the terminal identification information capable of identifying the mobile information terminal 700 to the broadcast receiving device 100 as a display permission response (S608).

[0451] Note that only when the mobile information terminal 700 is within a predetermined position range, it can send a display permission response to the viewing permission request transmitted from the broadcast receiving device 100, and when it is outside the position range, it may always send a display rejection response to the viewing permission request transmitted from the broadcast receiving device 100, which is the same as the case of the operation sequence shown in FIG. 30C.

[0452] Upon receiving the display permission response from the mobile information terminal 700, next, the broadcast receiving device 100 compares the authentication information and the terminal identification information included in the received display permission response with the authentication information and the terminal identification information stored in the authentication information storage area 1300 of the storage unit 110 or the personal information storage area (S609). In the process of S609, if the authentication information and the terminal identification information included in the display permission response received in the process of S608 match the authentication information and the terminal identification information stored in the authentication information storage area 1300 of the storage unit 110 or the personal information storage area, it is determined that the display of the content subject to the viewing restriction is permitted by the user of the mobile information terminal 700. On the other hand, if they do not match, it is determined that the display of the content subject to the viewing restriction is not permitted.

[0453] In the process of S609, when it is determined that the display of the content for which the viewing restriction should be imposed by the user of the mobile information terminal 700 is permitted (S610: Yes), next, the receiver function execution unit 1102 of the broadcast receiving apparatus 100 acquires the asset of the content that the user desires to view, the presentation time information regarding the asset, the layout control information, etc. (S611), and performs the decryption process (S612) and the presentation process (S613) of the MFU. Note that the processes of S611 to S613 may be the same as the processes of S217 to S220 in FIG. 14A, and the detailed description thereof is omitted.

[0454] In the process of S609, when it is determined that the display of the content for which the viewing restriction should be imposed by the user of the mobile information terminal 700 is not permitted (S610: No), it is assumed that the processes of S611 to S613 are not performed. Alternatively, the process of S611 may be performed and the processes of S612 to S613 may not be performed. Alternatively, the processes of S611 to S612 may be performed and the process of S613 may not be performed. In this case, the monitor unit 162 may display a black screen or a gray screen, a message indicating that the content is not displayed due to the viewing restriction, etc.

[0455] Also, as a result of the companion flag confirmation process of S603, when the value of the companion flag is set to '0' (S603: No), since the content of the channel that the user desires to view is content for which control according to the accompaniment of the guardian is not performed, viewing restriction control is performed only based on the reference result between the control information such as the MH-parental rating descriptor related to the content in the process of S602 and the set value of the viewing restriction setting menu 162n1 shown in FIG. 32. That is, the content of the channel that the user desires to view is restricted from being viewed (displayed), and the monitor unit 162 may display a black screen or a gray screen, a message indicating that the content is not displayed due to the viewing restriction, etc.

[0456] Also, in the process of S602, when it is confirmed that the content of the channel that the user desires to view is the content subject to viewing restriction processing, the accompanying flag confirmation process of S603 may not be performed. That is, regardless of the value of the accompanying flag or the presence or absence of the accompanying flag, the processes of S604 to S610 may always be performed.

[0457] Also, in the process of S602, when it is confirmed that the content of the channel that the user desires to view is not the content subject to viewing restriction (S602: No), the processes of S603 to S610 are not performed, and the processes of S611 to S613 may be performed.

[0458] Through the above processes, in the broadcast receiving apparatus 100 of this embodiment, it is possible to perform display control of the content subject to viewing restriction according to the presence or absence of the accompanying of a guardian. In particular, it is possible to control the viewing authentication for the content subject to viewing restriction on any of the mobile information terminals of the guardian information registered in plurality on the guardian information registration screen 162p, which is useful. That is, it is possible to provide a broadcast receiving apparatus capable of executing a function with higher added value.

[0459] As described above, the examples of the embodiments of the present invention have been described using Examples 1 to 4. However, the configurations for realizing the technology of the present invention are not limited to the above embodiments, and 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 also be added to the configuration of one embodiment. All of these belong to the scope of the present invention. Also, the numerical values, messages, etc. appearing in the text and drawings are merely examples, and using different ones will not impair the effects of the present invention.

[0460] The functions, etc. of the present invention described above may be realized in hardware by designing part or all of them, for example, by an integrated circuit. Also, they may be realized in software by a microprocessor unit or the like interpreting and executing an operation program for realizing each function, etc. Hardware and software may be used in combination.

[0461] Note that the software for controlling the broadcast receiving apparatus 100 may be stored in advance in the ROM 103 and / or the storage (accumulation) unit 110 etc. of the broadcast receiving apparatus 100 at the time of product shipment. It may also be acquired from other application servers 500 etc. on the Internet 200 via the LAN communication unit 121 after product shipment. Further, the software stored in a memory card, an optical disk, etc. may be acquired via the expansion interface unit 124 etc.

[0462] Also, the control lines and information lines shown in the figure indicate those considered necessary for explanation, and do not necessarily show all the control lines and information lines on the product. In reality, it may be considered that almost all components are interconnected.

Explanation of Reference Numerals

[0463] 100,800... Broadcast receiving device, 100a... Antenna, 101,801... Main control unit, 102,802... System bus, 103,803... ROM, 104,804... RAM, 110,810... Storage unit, 121,821... LAN communication unit, 124,824... Expansion 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, 161,861... 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... Broadcast satellite (or communication satellite), 300... Broadcast station server, 400... Service provider server, 500... Other application server, 600... Mobile phone communication server, 600b... Base station, 700... Portable information terminal.

Claims

1. An image display device, a receiving unit that receives encoded video data of a content, and first and second information related to viewing restrictions of the content; a video decoding unit that decodes the encoded video data received by the receiving unit to reproduce video information of a content; a display unit that displays video information of the content reproduced by the video decoding unit; a communication unit that transmits viewing permission request data to a predetermined portable information terminal for content that is subject to viewing restriction, and receives response data to the viewing permission request data from the predetermined portable information terminal; A control unit; Equipped with The control unit is When the response data received by the communication unit is a display permission response, the video decoding unit or the display unit is controlled so as to reproduce and display the content that the user of the video display device desires to view; If the response data received by the communication unit is a display refusal response, the content that the user of the video display device desires to view is not reproduced or displayed, Furthermore, the method determines whether the desired content is subject to the viewing restriction based on the first information, and if it is determined that the desired content is subject to the viewing restriction, a mode of controlling the communication unit to transmit the viewing permission request data to the predetermined portable information terminal in response to the second information; a mode in which the communication unit is controlled so as not to transmit the viewing permission request data to the predetermined portable information terminal, Image display device.

2. 2. The image display device according to claim 1, wherein the communication unit The predetermined portable information terminal is in a state in which it can communicate with the image display device, and The IP address of the portable information terminal and the IP address of the image display device are in the same subnetwork. if the viewing permission request data is within the predetermined range, the viewing permission request data is transmitted to the predetermined portable information terminal; The control unit is The communication unit did not transmit the viewing permission request data to the predetermined portable information terminal. when the content is displayed, the content that the user of the video display device desires to view is not reproduced or displayed. Image display device.

3. 2. The image display device according to claim 1, A storage unit is further provided for storing terminal identification information and authentication information capable of identifying the predetermined portable information terminal, The control unit is when the response data received by the communication unit is a display permission response and both the terminal identification information and the authentication information received by the receiving unit from the predetermined portable information terminal match the terminal identification information and the authentication information stored in the storage unit, respectively, the video decoding unit or the display unit is controlled to play and display the content that the user of the video display device wishes to view; Even if the response data received by the communication unit is a display permission response, if any of the terminal identification information and authentication information received by the receiving unit from the predetermined portable information terminal does not match the terminal identification information and authentication information stored in the storage unit, the content that the user of the video display device desires to view is not reproduced and displayed. Image display device.

4. An image display device, a receiving unit that receives encoded video data of a content, and first and second information related to viewing restrictions of the content; a video decoding unit that decodes the encoded video data received by the receiving unit to reproduce video information of a content; a display unit that displays video information of the content reproduced by the video decoding unit; a communication unit that transmits billing permission request data to a predetermined portable information terminal for paid content that is the subject of billing, and receives response data to the billing permission request data from the predetermined portable information terminal; A control unit; Equipped with The control unit is If the response data received by the communication unit is a charging permission response, the video decoding unit or the display unit is controlled to reproduce and display a pay content that a user of the video display device desires to view; If the response data received by the communication unit is a charge refusal response, the pay content that the user of the video display device desires to view is not reproduced or displayed, Furthermore, the method determines whether the desired content is a paid content that is subject to the charge based on the first information, and if it is determined that the desired content is a paid content that is subject to the charge, a mode of controlling the communication unit to transmit the billing permission request data to the predetermined portable information terminal in response to the second information; a mode in which the communication unit is controlled so as not to transmit the billing permission request data to the predetermined portable information terminal. Image display device.

5. 5. The image display device according to claim 4, wherein the communication unit comprises: The predetermined portable information terminal is in a state in which it can communicate with the image display device, and The IP address of the portable information terminal and the IP address of the image display device are in the same subnetwork. if the billing permission request data is within the range of the predetermined range, the billing permission request data is transmitted to the predetermined portable information terminal; The control unit is The communication unit did not transmit the accounting permission request data to the predetermined portable information terminal. when the user of the video display device requests to view the pay content, the pay content is not reproduced or displayed. Image display device.

6. 5. The image display device according to claim 4, A storage unit is further provided for storing terminal identification information and authentication information capable of identifying the predetermined portable information terminal, The control unit is when the response data received by the communication unit is a billing permission response and both the terminal identification information and the authentication information received by the receiving unit from the predetermined portable information terminal match the terminal identification information and the authentication information stored in the storage unit, respectively, control the video decoding unit or the display unit to play and display the content that the user of the video display device wishes to view; Even if the response data received by the communication unit is a billing permission response, if any of the terminal identification information and authentication information received by the receiving unit from the predetermined portable information terminal does not match the terminal identification information and authentication information stored in the storage unit, the content that the user of the video display device desires to view is not reproduced and displayed. Image display device.

Images