JP2018182762A - Receiving apparatus, television apparatus, storage medium, receiving method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide viewers with images making use of resolution height and the size of a screen originally provided by a digital television receiver.SOLUTION: The receiving apparatus includes: a demodulating unit that demodulates a received signal; and a processing unit for acquiring assets by layer by identifying presence or absence of hierarchical modulation by an asset group descriptor of an MMT package table. The processing unit determines the hierarchy to be transmitted on the basis of the asset group descriptor of the MMT package table, acquires a table storing application information at a time of hierarchical switching, and performs service on the basis of information contained in the table.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a receiving device, a television device, a storage medium, a receiving method, and a program.

Next-generation television broadcasting services, for example, 4K / 8K UHDTV (Ultra High Definition Television).
Hereinafter, it is called 4K / 8K. The broadcast of a television program by) is scheduled. Among the television broadcasting services, particularly in the case of broadcasting using a satellite broadcasting system, normal reception of television programs may be impeded due to attenuation of broadcast waves (rainfall attenuation) due to rainfall, etc. There is a drawback of that.
Therefore, as a countermeasure against rainfall attenuation, a television broadcasting station can simultaneously transmit a conventional video (a video with a lower resolution than 4K / 8K video and a high resistance to rainfall attenuation) together with a 4K / 8K video. It is possible to introduce. As a result, by switching to the conventional video even when the rainfall is attenuated, the viewer can continue watching the television program.
In Non-Patent Document 1 and Non-Patent Document 2, in satellite digital broadcasting, it is set as a standard to continue the service by switching the hierarchical transmission method against interruption at the time of rainfall. Non-Patent Document 3 describes a standard of a media transport method by MMT.

Radio wave industry association, "ARIB STD-B21 5.5 version receiver for digital broadcasting standard (desirable specification)", radio wave industry association The Radio Industries Association of Japan, "ARIB TR-B15 6.5 Edition (Third Volume) BS / Wideband CS Digital Broadcasting Operation Regulations", The Japan Radio Industries Association The Radio Industry Association of Japan, "ARIB STD-B60 1.0 version Media Transport Method Standard by MMT in Digital Broadcasting", The Japan Radio Industry Association

  In a digital broadcast television receiver in which two hierarchical services exist in the same channel, the display area is reduced when the modulation scheme of the video to be displayed is switched from the high hierarchy to the low hierarchy due to deterioration of the weather etc. If you try to make it look sharper than in the normal mode, there will be a waste of blank space on the screen. That is, in the prior art, there is a problem that it is impossible to fully utilize the height of resolution and the screen size which the digital television receiver originally has.

  The present invention has been made in view of the above-described points, and the receiving apparatus of the present invention, when switching broadcast video to be displayed from high resolution video to low resolution video, broadcast video with low resolution and various other than that. Generate a video that combines the video and the video. That is, the video other than the broadcast video is displayed in the space of the blank space on the screen generated by displaying the broadcast video with low resolution. As a result, the display area is effectively used so that the image can be displayed on the entire screen while maintaining the clearness of the image quality even at the time of rainfall attenuation, and the height and resolution of the resolution originally provided by the digital television receiver. Provided are a receiving device, a television device, a storage medium, a receiving method, and a program capable of providing a viewer with video utilizing size.

  (1) The present invention has been made to solve the above-described problems, and one aspect of the present invention is the presence or absence of hierarchical modulation by a demodulation unit that demodulates received signals, and an asset group descriptor of an MMT package table. And a processing unit for acquiring an asset for each hierarchy, the processing unit determining the hierarchy to be transmitted based on the asset group descriptor of the MMT package table, and when switching the hierarchy, It is a receiving device that acquires a table storing information of an application and performs a service based on the information included in the table.

  (2) Further, according to an aspect of the present invention, in the receiving device according to (1), the processing unit activates an application based on the table when the layer is switched.

  (3) Further, one aspect of the present invention is the receiving device according to (1) or (2), wherein the processing unit activates an application for which AUTOSTART is specified at the time of switching of the layer.

  (4) Further, one aspect of the present invention is the receiving apparatus according to any one of (1) to (3), wherein the processing unit is configured to calculate the hierarchy based on a high hierarchy error rate of the received signal. Decide.

  (5) Further, according to one aspect of the present invention, there is provided a demodulation unit that demodulates a received signal, and a processing unit that identifies the presence or absence of hierarchical modulation by the asset group descriptor of the MMT package table and acquires assets by hierarchy. And the processing unit determines the layer to be transmitted based on the asset group descriptor of the MMT package table, acquires a table storing information of the application when the layer is switched, and includes the table. Is a television device that provides services based on the

  (6) Further, according to one aspect of the present invention, a demodulation procedure for demodulating a received signal to the computer of the receiving device, and the presence or absence of hierarchical modulation is identified by the asset group descriptor of the MMT package table, A processing procedure to be acquired is executed, and in the processing procedure, a hierarchy to be transmitted is determined based on an asset group descriptor of the MMT package table, and a table storing information of an application is acquired when switching the hierarchy. And a program for providing a service based on the information contained in the table.

  (7) Moreover, one aspect of the present invention is a computer readable storage medium storing the program according to (6).

  (8) Further, one aspect of the present invention is a reception processing method in a receiving apparatus, comprising: a demodulation process for demodulating a received signal; identifying presence / absence of hierarchical modulation by an asset group descriptor of an MMT package table; A process of acquiring another asset is executed, and in the process, a layer to be transmitted is determined based on an asset group descriptor of the MMT package table, and application information is stored when the layer is switched This is a reception method of acquiring a table and performing a service based on the information included in the table.

  According to the present invention, it is possible to provide a viewer with video utilizing the height of the resolution and the size of the screen which the digital television receiver originally has.

It is a schematic diagram showing an example of a broadcast system concerning this embodiment. It is a block diagram which shows the structure of the transmitter which concerns on this embodiment. It is a figure which shows an example of the data structure of MPT contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the data structure of the asset group descriptor (Asset_Group_Descriptor ()) contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the data structure of the video component descriptor (Video_Component_Descriptor ()) contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the value of the video signal resolution (video_resolution) contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the value of the video signal aspect-ratio (video_aspect_ratio) contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the value of the video signal frame rate (video_frame_rate) contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the data structure of the location information (MMT_general_location_info ()) contained in the structure information which the receiver concerning this embodiment receives. It is a block diagram showing composition of a server apparatus concerning this embodiment. It is a block diagram which shows the structure of the receiver which concerns on this embodiment. It is a block diagram showing composition of a control part concerning this embodiment. It is the schematic which shows an example of the image | video which superimposed the image | video (GUI screen) based on communication content on the image | video of a broadcast program based on this embodiment. It is a flowchart which shows operation | movement of the receiver which concerns on the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the receiver which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the data structure of MH-AIT contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the value of the application format (application_type) contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the value of the application control code (application_control_code) contained in the structure information which the receiver concerning this embodiment receives. It is a flowchart which shows operation | movement of the receiver which concerns on the 3rd Embodiment of this invention.

First Embodiment
A first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing an example of a broadcast system according to the present embodiment.
The broadcast system 1 of the first embodiment is configured to include a transmitting device 11, a server device 21 and a receiving device 31. The transmission device 11 and the server device 21 configure a broadcast facility that a broadcaster has. The receiving device 31 receives the broadcast program broadcasted from the transmitting device 11, displays the video of the received broadcast program, and reproduces the sound of the broadcast program. Further, the receiving device 31 communicates with the server device 21 to transmit and receive data. The receiving device 31 is installed in each home or office.

The transmission device 11 sequentially transmits data of a broadcast program (program data) to the reception device 31 via the broadcast transmission path 12. The transmission device 11 is, for example, a radio wave transmission base station including a radio wave tower or the like for a broadcaster or the like to transmit a broadcast wave.
The broadcast transmission path 12 is a transmission path which transmits various data transmitted by the transmission device 11 to the unspecified number of reception devices 31 in one direction simultaneously. The broadcast transmission path 12 is, for example, a radio wave (broadcast wave) of a predetermined frequency band relayed by the broadcast satellite 13. The broadcast transmission line 12 can include a terrestrial broadcast transmission line. A part of the broadcast transmission line 12 may include a communication line, for example, a communication line from the transmission device 11 to a transmission facility for transmitting radio waves. Note that transmitting (or receiving) various data via the broadcast transmission path 12 may be referred to as “transmitting by broadcast (or receiving or downloading)”.

  The server device 21 is a server device that stores communication content created by a broadcaster, a content service provider, an Internet content creator, or the like. The server device 21 is, for example, a server device installed in a WWW (World Wide Web) server accommodation facility such as an iDC (Internet Data Center). The location of the server device 21 is notified to the receiving device 31 via the broadcast transmission path 12 by, for example, a URL (Uniform Resource Locator; uniform resource locator). When receiving the communication content request signal from the receiving device 31, the server device 21 transmits the requested communication content to the receiving device 31.

  The communication transmission path 22 is a transmission path which bidirectionally transmits various data between the server device 21 and the receiving device 31. The communication transmission path 22 includes, for example, a wide area communication network such as the Internet having a wired large capacity backbone network. The communication transmission path 22 may be a communication network including a wireless access network in part, for example, a public wireless communication network. Note that transmitting various data via the communication transmission path 22 may be referred to as “transmitting (receiving or downloading) by communication”.

The receiving device 31 starts a CAS program for decoding data received from the transmitting device 11 via the broadcast transmission path 12, and decodes the received data by executing the started CAS program.
The receiving device 31 receives broadcast content from the transmitting device 11 and communication content from the server device 21. The receiving device 31 is provided with a function for connecting to the communication transmission path 22 via a wired LAN cable or a wireless LAN connection with a Wi-Fi router (Wireless Fidelity Router; wireless LAN master device). The receiving device 31 is, for example, a television receiving device, a video recording device, or the like.

(Configuration of transmitter)
Next, the configuration of the transmission device 11 according to the present embodiment will be described.
FIG. 2 is a block diagram showing the configuration of the transmission apparatus according to the present embodiment. The transmission device 11 includes a program data generation unit 111, a configuration information generation unit 112, a multiplexing unit 113, an encryption unit 114, and a transmission unit 115.

The program data generation unit 111 acquires video data representing video constituting a broadcast program and audio data representing audio constituting a broadcast program.
The program data generation unit 111 acquires video data encoded by a predetermined video encoding method. The predetermined video coding method is, for example, a method standardized by ISO / IEC 23008 HEVC (International Organization for Standardization / International Electronic Commission 23008 Part 2 High Efficiency Video Coding, also simply referred to as HEVC).
Also, the program data generation unit 111 acquires audio data encoded by a predetermined audio encoding method. The predetermined audio encoding method is, for example, an audio encoding method defined in ISO / IEC 14496 Part 3 (also simply referred to as MPEG-4 audio, where MPEG is an abbreviation for Moving Picture Experts Group). is there.

The program data generation unit 111 generates program data of a predetermined format from the acquired video data and audio data, and outputs the generated program data to the multiplexing unit 113. Program data of a predetermined format is, for example, an MPU (Media (MPEG) specified by ISO / IEC 23008 Part 1 MMT (MPEG Media Transport, also simply referred to as MMT).
Processing Unit). Each MPU includes video data or audio data of a unit capable of decoding video and audio.

The configuration information generation unit 112 acquires component element information which is information for configuring a broadcast program or a service provided along with the broadcast. The component information includes an asset which is a component of a broadcast program or service, that is, a list of video, audio, etc., and information indicating the requirements of those.
In addition, for example, as a measure for attenuation of broadcast waves due to rainfall, there is a rainfall compatible broadcast by a hierarchical transmission method. This is to transmit a sub-broadcast (rainfall-compatible broadcast) in which the same program as the main broadcast is further reduced in resolution and sound quality by the hierarchical transmission method simultaneously with the main broadcast.
For example, in the case of transmitting a plurality of broadcast videos simultaneously as the above-mentioned component element information when broadcasting by a hierarchical transmission method, etc., information on the resolution of each video and the priority for displaying each video Information and the like are also included in the component information.

The configuration information generation unit 112 generates configuration information of a predetermined format from the acquired component element information, and outputs the generated configuration information to the multiplexing unit 113. The configuration information of the predetermined format is, for example, MPT (MMT) that configures MMT-SI (MMT-System Information)
Package Table). An example of the MPT will be described later.

  The multiplexing unit 113 multiplexes the program data input from the program data generation unit 111 and the configuration information input from the configuration information generation unit 112 to form a predetermined format (for example, TLV (Type Length Value) packet). Generate multiplexed data. The multiplexing unit 113 outputs the generated multiplexed data to the encryption unit 114.

  The encryption unit 114 encrypts the multiplexed data input from the multiplexing unit 113 using a predetermined encryption method (for example, AES (Advanced Encryption Standard) or MULTI 2). The encryption unit 114 outputs the encrypted multiplexed data to the transmission unit 115.

  The transmission unit 115 transmits the multiplexed data input from the encryption unit 114 to the reception device 31 via the broadcast transmission path 12. Here, the transmitting unit 115 modulates a carrier wave having a predetermined carrier frequency with multiplexed data which is a baseband signal, and a radio wave (broadcast wave) of a channel band corresponding to the carrier frequency is transmitted by an antenna (not shown). Radiate.

(MPT data structure)
Next, an example of the MPT included in the configuration information will be described. MPT is a standard defined in ARIB (Association of Radio Industries and Businesses: Radio Industry Association) in Non-Patent Document 3.
FIG. 3 is a view showing an example of the data structure of MPT received by the receiving apparatus of the present invention. In the example shown in FIG. 3, the MPT includes an asset type (asset_type) and an asset descriptor area (asset_descriptors_byte) for each asset.

The asset type (asset_type) describes a code indicating the type of asset. The configuration information generation unit 112 describes, for example, hcv1 indicating video data encoded by HEVC and mp4a indicating audio data encoded by MPEG-4 audio as an asset type (asset_type).
An asset descriptor area (asset_descriptors_byte) is an area where an asset descriptor is described.

  Note that uimsbf in the column of “data notation” in FIG. 3 is an abbreviation of unsigned integer most significant bit first, and means an unsigned integer whose most significant bit is the head. Also, bslbf is an abbreviation of bit string left bit first, and means a bit string whose left bit is the head. In addition, char is an abbreviation of character, and means a fixed-length data type mainly used for storing a character code.

  In the case where a broadcast by a hierarchical transmission scheme is provided, the configuration information generation unit 112 (FIG. 2) is an asset group descriptor (Asset_Group_Descriptor ()) and a video component descriptor (Video_Component_Descriptor ()) for each hierarchical transmission scheme. Generate

An asset group descriptor (Asset_Group_Descriptor ()) is a descriptor in which parameters relating to asset group relationships and priorities within groups are described. For example, in a broadcast using a hierarchical transmission scheme, the configuration information generation unit 112 generates an asset group descriptor (Asset_Group_Descriptor ()), and generates the generated asset group descriptor (Asset_Group_Descriptor ()) as an asset descriptor area (asset_descriptors_byte). Include in
In the case where the information about the group relationship of the asset and the priority in the group are not required, for example, when the broadcast using the hierarchical transmission scheme is not performed, the configuration information generation unit 112 generates an asset group descriptor (Asset_Group_Descriptor ()). Do not generate

Also, the video component descriptor (Video_Component_Descriptor ()) is a descriptor in which parameters relating to the video component are described.
For example, in a broadcast using a hierarchical transmission method, the configuration information generation unit 112 generates a video component descriptor (Video_Component_Descriptor ()), and generates the generated video component descriptor (Video_Component_Descriptor ()) as an asset descriptor area (asset_descriptors_byte). Include in

  As described above, an asset group descriptor (Asset_Group_Descriptor ()) and a video component descriptor (Video_Component_Descriptor ()) are generated for each asset of broadcast by the hierarchical transmission scheme.

(Data structure of asset group descriptor)
Next, an example of an asset group descriptor (Asset_Group_Descriptor ()) will be described. The asset group descriptor (Asset_Group_Descriptor ()) is a standard defined in ARIB (The Radio Industry Association of Japan) in Non-Patent Document 3.
FIG. 4 is a diagram showing an example of a data structure of an asset group descriptor (Asset_Group_Descriptor ()) received by the receiving device of the present invention. The asset group descriptor (Asset_Group_Descriptor ()) includes a group ID (group_identification) and a selection level (selection_level).

Group ID (group_identification) is identification information of a group to which an asset belongs. A group is a set of assets that can be regarded as having the same content and being equal, such as the same video and the same audio, among the assets constituting the content. Here, the coding method and the resolution do not have to be identical if the contents are identical and equal.
For the selection level, for example, “0” indicates a default asset, “1” indicates an alternative asset, and the like, indicating the selection priority of the assets in the group.

(Data structure of video component descriptor)
Next, an example of the video component descriptor (Video_Component_Descriptor ()) will be described. Note that the video component descriptor (Video_Component_Descriptor ()) is a standard defined in ARIB (The Radio Wave Industry Association of Japan) in Non-Patent Document 3.
FIG. 5 is a view showing an example of the data structure of a video component descriptor (Video_Component_Descriptor ()) received by the receiving apparatus of the present invention. The video component descriptor includes a video signal resolution (video_resolution), a video signal aspect ratio (video_aspect_ratio), and a video signal frame rate (video_frame_rate).

The video signal resolution (video_resolution) indicates the vertical resolution of the video signal. The video signal resolution (video_resolution) is encoded according to FIG.
FIG. 6 is a diagram showing an example of video signal resolution (video_resolution) values received by the receiving apparatus of the present invention. For example, in the case of 4K video, since the resolution in the vertical direction of 4K video is 2160, the video signal resolution (video_resolution) is “6”. Further, in the case of the 8K video, the resolution in the vertical direction of the 8K video is 4320, so the video signal resolution (video_resolution) is “7”. Further, in the case of an SD (standard image quality) video, since the resolution in the vertical direction of the SD video is 480, the video signal resolution (video_resolution) is “3”.

The video signal aspect ratio (video_aspect_ratio) indicates the aspect ratio of the video signal. The video signal aspect ratio (video_aspect_ratio) is encoded according to FIG.
FIG. 7 is a diagram showing an example of a video signal aspect ratio (video_aspect_ratio) value received by the receiving apparatus of the present invention. For example, in the case where the aspect ratio is 16: 9 (with pan vector), it is “2”. When the aspect ratio is 4: 3, it is "1".
The pan vector is angle of view information which is one of identification control information attached to a broadcast signal in digital television broadcast, and is an additional symbol for automatically identifying a change display to an aspect ratio of 4: 3. It is information.

Returning to FIG. 5, the video signal frame rate (video_frame_rate) indicates the frame rate of the video signal. The video signal frame rate (video_frame_rate) is encoded according to FIG.
FIG. 8 is a diagram showing an example of the value of the video signal frame rate (video_frame_rate) received by the receiving apparatus of the present invention. For example, when the frame rate is 60 / 1.001 fps (frames per second), it is "8". Also, when the frame rate is 30 fps, it is “6”.

Referring back to FIG. 3, the MPT has a URL (Uniform) indicating a location on the Internet.
Resource Locator (Unified Resource Locator) may be included. For example, the broadcaster stores data indicating program-related information (communication content) related to a broadcast program in the server device 21. Then, the transmitting device 11 transmits the program data and the configuration information by broadcasting, and includes data indicating the URL information of the program related information in the configuration information.
As a result, the receiving device 31 can receive the broadcast program and obtain the information of the URL from the configuration information. Then, the receiving device 31 transmits a communication content request signal to the server device 21 via the communication transmission path 22 based on the information of the URL. As described above, the receiving device 31 can acquire program related information related to the broadcast program being received from the server device 21.
In addition, the information which shows URL is stored in the location information (MMT_general_location_info ()) of MPT.

(Data structure of location information)
Next, an example of location information (MMT_general_location_info ()) included in the MPT will be described. The location information (MMT_general_location_info ()) is a standard defined in ARIB (The Radio Industry Association of Japan) in Non-Patent Document 3.
FIG. 9 is a diagram showing an example of a data structure of location information (MMT_general_location_info ()) received by the receiving apparatus of the present invention. Location information (MMT_general_location_info ()) includes location type (location_type), URL length (URL_length), and URL byte (URL_byte).

  The location type (location_type) indicates the type of location information. For example, when it is indicated that the type of location information is a URL, “0x05” is set as the location type (location_type). The URL length (URL_length) indicates the length of the URL byte field in bytes. The URL byte (URL_byte) indicates a URL.

(Configuration of server device)
Next, the configuration of the server device 21 will be described.
FIG. 10 is a block diagram showing the configuration of the server apparatus according to the present embodiment. The server device 21 includes a control unit 210, a communication unit 213, and a storage unit 214. The control unit 210 includes a communication content acquisition unit 211 and a communication content distribution unit 212.

  The control unit 210 controls various operations of the server device 21. The communication content acquisition unit 211 acquires communication content through the communication transmission path 22 by the communication unit 213. The control unit 210 stores the communication content acquired by the communication content acquisition unit 211 in the storage unit 214. The control unit 210 is, for example, a CPU.

  Further, the control unit 210 acquires the communication content request signal transmitted from the receiving device 31 by the communication unit 213 via the communication transmission path 22. When acquiring the communication content request signal, the control unit 210 acquires from the storage unit 214 the communication content indicated by the requested communication content request signal. The communication content distribution unit 212 causes the communication unit 213 to transmit the communication content acquired from the storage unit 214 to the reception apparatus 31 via the communication transmission path 22 by communication.

(Configuration of receiver)
Next, the configuration of the receiving device 31 will be described.
FIG. 11 is a block diagram showing the configuration of a receiving apparatus according to this embodiment. The receiving device 31 includes a tuner 311 (receiving unit), a decoding unit 312, a separation unit 313, an audio decoding unit 314, an audio reproduction unit 315, a video decoding unit 316, a GUI synthesis unit 317, a video display unit 318, a communication unit 321, control The configuration includes a unit 331, an operation input unit 332, and a storage unit 341.

  The tuner 311 receives the broadcast wave transmitted by the transmission device 11 via the broadcast transmission path 12. The tuner 311 specifies a broadcast channel band corresponding to the broadcast channel designated by the broadcast channel signal input from the control unit 331 based on the instruction from the operation input unit 332332. The tuner 311 downconverts and demodulates the reception signal of the broadcast channel band received as a broadcast wave into multiplexed data which is a baseband signal. The tuner 311 outputs the demodulated multiplexed data to the decoding unit 312.

  The decryption unit 312 decrypts the multiplexed data (which has been encrypted) input from the tuner 311 by a decryption method (for example, AES) corresponding to the method used by the encryption unit 114 of the transmission device 11, Generate decoded multiplexed data. The decoding unit 312 outputs the generated multiplexed data to the separation unit 313.

  The separation unit 313 separates the decoded multiplexed data input from the decoding unit 312 into program data and configuration information. The separation unit 313 outputs the configuration information to the control unit 331. Further, the separation unit 313 extracts audio data and video data from the program data. The separation unit 313 outputs the extracted audio data to the audio decoding unit 314, and outputs the video data to the video decoding unit 316.

The speech decoding unit 314 receives speech data from the separation unit 313. The input audio data is data encoded by a predetermined audio coding method (for example, MPEG-4 audio). The audio decoding unit 314 decodes audio data input by a decoding method corresponding to the encoding method used for encoding, and generates decoded audio data. The decoded audio data is data indicating the level of audio at each time.
The audio reproduction unit 315 reproduces the audio based on the audio data input from the audio decoding unit 314, and includes, for example, a speaker.

  When broadcast by the hierarchical transmission scheme is provided, audio data of a plurality of reproduction schemes may be input to the audio decoding unit 314, and a scheme selection signal may be input to the audio decoding unit 314 from the control unit 331. The scheme selection signal is a signal instructing any one of the sounds of the plurality of reproduction schemes. The audio decoding unit 314 decodes audio data relating to the reproduction scheme specified by the scheme selection signal, which is a reproduction scheme in which the own speech decoding unit 314 has processing capability, out of audio data of a plurality of predetermined reproduction schemes. Perform and generate the original voice data. The audio decoding unit 314 outputs the decoded original audio data to the audio reproduction unit 315.

  Therefore, when the broadcast by the hierarchical transmission scheme is provided, the audio of the reproduction scheme designated by the scheme selection signal is reproduced by the audio reproduction unit 315. In addition, when a system selection signal is not input, the audio | voice decoding part 314 outputs the original audio | voice data which concerns on the audio | voice of the main broadcast to the audio | voice reproduction part 315. FIG.

  The video decoding unit 316 receives video data from the separation unit 313. The input video data is data encoded by a predetermined video coding method (for example, HEVC, MPEG-2 video). The video decoding unit 316 decodes the video data input by a decoding method corresponding to the encoding method used for the encoding, and generates decoded video data. The decoded video data is data indicating a signal value forming a video (frame image) at each time. The video decoding unit 316 outputs the decoded video data to the GUI combining unit 317.

  When broadcast by the hierarchical transmission scheme is provided, video data of a plurality of resolutions may be input to the video decoding unit 316, and a scheme selection signal may be input to the video decoding unit 316 from the control unit 331. The scheme selection signal is a signal indicating any one of the images of a plurality of resolutions. The video decoding unit 316 decodes video data relating to the resolution specified by the system selection signal, which is a reproduction method in which the own video decoding unit 316 has a processing capability, among the video data of a plurality of predetermined resolutions. Generate video data of

  Therefore, when the broadcast by the hierarchical transmission scheme is provided, the image of the resolution designated by the scheme selection signal is displayed on the image display unit 318 after passing through the GUI combining unit 317. Note that, when the scheme selection signal is not input, the video decoding unit 316 outputs the original video data relating to the video of the main broadcast to the video display unit 318 via the GUI combining unit 317.

A GUI (Graphical User Interface) combining unit 317 combines the video data input from the video decoding unit 316 and the various GUI screen data input from the control unit 331, and displays the video data to be displayed on the video display unit 318. Generate The GUI screen data includes, for example, tuning screen data for selecting a broadcast channel, electronic program guide (EPG: Electric Program Guide) data, and the like. The video display unit 318 displays a video based on the GUI screen data input from the control unit 331 from the GUI combining unit 317 via the GUI combining unit 317.
Therefore, the video display unit 318 displays a video in which the video of the GUI screen related to the GUI screen data generated by the receiving device 31 is superimposed on the video related to the video data received by the receiving device 31.

  The video display unit 318 displays a video based on the video data input from the video decoding unit 316 via the GUI combining unit 317, and includes a display, for example, a liquid crystal display, an organic EL (electroluminescence) display, etc. It consists of

  The communication unit 321 transmits and receives various data to and from an external device, for example, the server device 21 via the communication transmission path 22. Transmission and reception by each component of the reception device 31 are performed via the communication unit 321. The communication unit 321 is, for example, an apparatus for connecting to a network, that is, a communication interface.

  The control unit 331 includes a computer (CPU) (not shown), and controls various operations of the receiving device 31 by executing software stored in the storage unit. The control unit 331 acquires, from the tuner 311, reception state information of the broadcast wave being received. The control unit 331 detects whether the acquired reception state information has a value higher than a predetermined reference value (the reception state is good) or a low value (the reception state is poor). . In addition, for example, when a high resolution video such as 4K / 8K video is displayed on the video display unit 318, does the predetermined reference value reach the intensity level of the received signal that can be viewed comfortably? It is a standard value which shows whether or not.

  Also, for example, the control unit 331 detects from the configuration information input from the separation unit 313 that the broadcast is based on the hierarchical transmission scheme. That is, it is detected that the video data includes the video of the main broadcast and the video of the sub broadcast.

  Also, for example, when the control unit 331 recognizes that the intensity level of the received signal is lower than the reference value, and detects that the rain-enabled broadcast is included in the video data, the control unit 331 selects the scheme selection signal. Is output to the video decoding unit 316. The scheme selection signal is a signal indicating that the same program as the main broadcast is to be switched to a sub broadcast (a rainfall compatible broadcast) to be broadcast with a lower resolution by the hierarchical transmission scheme. Further, the control unit 331 causes the communication unit 321 to transmit a communication content request signal to the server device 21 via communication in order to obtain communication content including program related information related to the received broadcast program.

  The control unit 331 acquires data indicating the communication content received by the communication unit 321 from the server device 21. The control unit 331 outputs data indicating the acquired communication content to the GUI combining unit 317. The communication content includes information on program related information related to the received broadcast program.

(Configuration of control unit)
Next, the configuration of the control unit 331 according to the present embodiment will be described.
FIG. 12 is a block diagram showing the configuration of the control unit 331 according to the present embodiment. The control unit 331 includes a reception level detection unit 3311, a configuration information decryption unit 3312, a screen configuration determination unit 3313, and a communication content acquisition unit 3314.

  The reception level detection unit 3311 determines whether the reception state is good or bad based on the reception state information input from the tuner 311. The reception state information is, for example, any one or a combination of the electric field strength of the broadcast wave detected by the tuner 311, the error rate of multiplexed data transmitted by the broadcast wave, and the CN value (Carrier-to-Noise Ratio). The reception level detection unit 3311 generates reception state information indicating whether the reception state is good or bad, and outputs the generated reception state information to the screen configuration determination unit 3313. For example, the reception level detection unit 3311 determines that the reception state is inferior when any of the following applies, and determines that the reception state is good when none of the following applies. (A) the received electric field strength is lower than the predetermined electric field strength threshold (b) the error rate is higher than the predetermined error rate threshold (c) the CN value is lower than the predetermined CN value threshold.

  In addition, as a reception failure that causes the reception state to be in a poor state, for example, the reception failure generated when the electric field strength of the broadcast wave is reduced by rain, the broadcast wave is blocked by a structure or another object There are reception failures that occur, etc.

  When it is determined that the reception state is good, the reception level detection unit 3311 generates reception state information indicating that the reception state is good, and outputs the generated reception state information to the screen configuration determination unit 3313. When it is determined that the reception state is poor, the reception level detection unit 3311 generates reception state information indicating that the reception state is inferior, and outputs the generated reception state information to the screen configuration determination unit 3313.

  The configuration information decoding unit 3312 detects the MPT from the configuration information input from the separation unit 313, and determines whether broadcast by the hierarchical transmission scheme is provided based on the detected MPT. Here, the configuration information decoding unit 3312 determines whether an asset group descriptor (Asset_Group_Descriptor ()) described in an asset descriptor area (asset_descriptors_byte) of the MPT is described for each asset related to program data.

  If the configuration information decryption unit 3312 determines that the asset group descriptor (Asset_Group_Descriptor ()) is described in the MPT, the group ID in which the asset group descriptor (Asset_Group_Descriptor ()) is set as a parameter, (Group_identification) and the selection level (selection_level) are acquired.

  Also, the configuration information decoding unit 3312 refers to the video component descriptor (Video_Component_Descriptor ()) for the asset indicated by the asset group descriptor (Asset_Group_Descriptor ()). The configuration information decoding unit 3312 acquires the video signal resolution (video_resolution), the video signal aspect ratio (video_aspect_ratio), and the video signal frame rate (video_frame_rate) which are parameterized in the video component descriptor (Video_Component_Descriptor ()).

  Therefore, the configuration information decoding unit 3312 adds one set of group ID (group_identification), selection level (selection_level), video signal resolution (video_resolution), video signal aspect ratio (video_aspect_ratio), and video signal frame rate (video_frame_rate) to 1 Obtain as configuration information pertaining to one asset.

An example of the structure information which the structure information decoding part 3312 acquires, when the main broadcast and the sub broadcast (rainfall corresponding | compatible broadcast) are broadcasted by a hierarchy transmission system is shown.
The configuration information of the main broadcast is “0x00” for group ID (group_identification), “0” for selection level (selection_level), “7” for video signal resolution (video_resolution), and “2” for video signal aspect ratio (video_aspect_ratio) And the video signal frame rate (video_frame_rate) is “11”.
The sub broadcast configuration information is “0x00” for group ID (group_identification), “1” for selection level (selection_level), “3” for video signal resolution (video_resolution), and “1” for video signal aspect ratio (video_aspect_ratio) And the video signal frame rate (video_frame_rate) is “5”.

  In the above example, both group IDs (group_identification) being “0x00” indicate that each program data related to the two pieces of configuration information is the program data of the same broadcast program. The selection level (selection_level) of “0” and “1” indicates that “0” is the default video, that is, the main broadcast, and “1” is the sub broadcast. That is, when there is a plurality of program data having the same group ID (group_identification) and priority is given by the selection level (selection_level), the configuration information decoding unit 3312 determines that the main broadcast by hierarchical transmission scheme is used. It is possible to detect that a secondary broadcast (for example, a broadcast corresponding to rainfall) is being performed.

  In addition, not only two types of main broadcast and sub broadcast but also three or more types of broadcast may be included. In that case, as the selection level (selection_level), values such as “2”, “3”, and “4” are set as parameters in addition to “0” and “1”. “0” is a default broadcast, and for parameter values other than “0”, smaller numbers indicate higher priority assets.

  For example, by prescribing that the larger the numerical value of the parameter value of the selection level (selection_level) is, the lower the resolution is, the larger the numerical value is, the smaller the broadcast video image size becomes, and the video display unit It can be seen that the margin portion of the image display area 318 becomes large. That is, it is understood that the display area capable of displaying the communication content becomes larger in the video display area. Therefore, the data amount of the communication content to be acquired may be changed according to the numerical value of the parameter value of the selection level (selection_level). That is, as the display area of the broadcast video becomes smaller, the display area for displaying the communication content is made larger.

  The screen configuration determination unit 3313 acquires reception state information from the reception level detection unit 3311. Also, for example, the screen configuration determination unit 3313 can send a group ID (group_identification), a selection level (selection_level), a video signal resolution (video_resolution), a video signal aspect ratio (video_aspect_ratio), and a video signal frame rate from the configuration information decoding unit 3312 The configuration information of two sets (that is, the main broadcast and the sub broadcast) is acquired, where (video_frame_rate) is one set of configuration information.

  When the configuration information decoding unit 3312 acquires two sets of configuration information of the main broadcast and the sub broadcast as in the above example, for example, when the reception status information indicating that the reception status is poor is acquired. , And outputs the scheme selection signal to the video decoding unit 316. The scheme selection signal is a signal indicating that the same program as the main broadcast is to be switched to a sub broadcast (that is, a broadcast corresponding to rainfall) to be broadcast with a lower resolution by the hierarchical transmission scheme.

  Further, the screen configuration determination unit 3313 outputs a communication content request signal from the communication content acquisition unit 3314 to the communication unit 321 in order to acquire communication content including program related information related to the received broadcast program.

  The screen configuration determination unit 3313 acquires, from the communication unit 321, data indicating the communication content transmitted by communication by the server device 21. The screen configuration determining unit 3313 outputs data indicating the acquired communication content to the GUI combining unit 317. The communication content includes program-related information related to the broadcast program being viewed by the viewer.

The GUI combining unit 317 superimposes a video (GUI screen) based on the communication content indicated by the GUI screen data input from the screen configuration determination unit 3313 on the video of the broadcast program indicated by the video data input from the video decoding unit 316. The generated video is generated and displayed on the video display unit 318.
FIG. 13 is a schematic diagram showing an example of a video in which a video (GUI screen) based on communication content is superimposed on a video of a broadcast program according to the present embodiment. In (A) of FIG. 13, a video 521 a of a broadcast program is displayed in the video display area 511 a. In (B) of FIG. 13, a video 521 b of a broadcast program and a video (GUI screen) 522 of communication content are displayed in the video display area 511 b.

FIG. 13A is a display example in which the video display unit 318 displays the video 521 a of the main broadcast before the reception is switched to the sub broadcast. FIG. 13A shows that a broadcast video, which is a program of a professional baseball relay, is displayed in the entire video display area 511 a in the video display unit 318.
On the other hand, FIG. 13B shows a display example in which the video display unit 318 displays the video 521 b of the sub broadcast which is after the reception is switched to the sub broadcast and the resolution is lower than the resolution of the video display unit 318. It is. The sub broadcast video with a low resolution is displayed using a part of the video display area 511b, as shown in FIG. 13 (B). The video display unit 318 displays information of “progress in progress of other stadiums”, which is the communication content, in the area under the area where the video of the sub broadcast is displayed. That is, in the lower area of the broadcast video of "professional baseball relay", information of "progress of other baseball stadium" which is program related information is displayed.

(Operation of receiver)
Next, the operation of the receiving device 31 will be described.
FIG. 14 is a flowchart showing the operation of the receiving device 31 according to the present embodiment.
In the flowchart, the process is started when the separating unit 313 separates the decoded multiplexed data input from the decoding unit 312 into program data and configuration information.

(Step S101) The separation unit 313 detects an MPT from the multiplexed data decoded by the decoding unit 312, and separates the detected MPT. The configuration information decoding unit 3312 of the control unit 331 acquires the MPT from the separation unit 313, and refers to an asset group descriptor (Asset_Group_Descriptor ()) for each asset included in the MPT. The configuration information decoding unit 3312 detects the value set at the selection level (selection_level) of the asset group descriptor (Asset_Group_Descriptor ()).
Then, it progresses to S102.

(Step S102)
If the value set at the selection level (selection_level) is “0” (default), the process returns to step S101. The case where the value is “0” indicates that the video included in the asset is the video of the main broadcast.
If the value set at the selection level (selection_level) is not “0”, the process proceeds to step S103. When the value is not "0", that is, when the value is "1" or more, it indicates that the video included in the asset is a video of a sub broadcast (for example, a broadcast corresponding to rainfall) .

(Step S103)
The reception level detection unit 3311 acquires the reception state information input from the tuner 311, and confirms whether the reception state indicated by the reception state information is good or bad. Thereafter, the process proceeds to step S104.
(Step S104)
The reception level detection unit 3311 determines the reception state based on the confirmed reception state information.
If the reception state is poor, the process proceeds to step S105. If the reception state is good, the process returns to step S101.

(Step S105)
The control unit 331 generates data of a notification screen for notifying the viewer that the hierarchical transmission scheme should be switched to the rainfall compatible broadcasting. The notification screen is generated by acquiring the notification message stored in the storage unit 341 from the storage unit 341. The data of the notification screen in this case is, for example, GUI screen data that causes the video display unit 318 to display “Switch video to broadcast compatible with rainfall”. The GUI combining unit 317 notifies the viewer by superimposing a video of GUI screen data indicating the generated notification screen on a broadcast video and displaying the video on the video display unit 318. Thereafter, the process proceeds to step S106.

(Step S106)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a scheme selection signal indicating switching to the video of the sub broadcast (for example, rainfall compatible broadcast). The video decoding unit 316 switches the video data to be output to the GUI combining unit 317 from the main broadcast to the sub broadcast. Thereafter, the process proceeds to step S107.

(Step S107)
The communication content acquisition unit 3314 transmits a communication content request signal to the server device 21 via the communication unit 321. The communication content acquisition unit 3314 acquires data indicating communication content (for example, program related information) from the server device 21. The screen configuration determination unit 3313 outputs the data of the communication content acquired by the communication content acquisition unit 3314 to the GUI combining unit 317.
The GUI combining unit 317 displays a video (GUI screen based on the data of the communication content in the margin portion of the screen generated by switching to the video of the sub broadcast (for example, the rainfall corresponding to the rain) reduced from the video of the main broadcast. The video of the GUI screen data is superimposed on the broadcast video of the sub broadcast so as to be displayed on the video display unit 318. Thereafter, the process shown in FIG. 14 is ended.

As described above, in the receiving apparatus 31 according to the first embodiment of the present invention, among the received configuration information, the presence of a plurality of program data of the same broadcast program but different in video resolution from the MPT. A configuration information decoding unit 3312 that detects Further, the receiving device 31 includes a reception level detection unit 3311 that determines whether the reception state is good or bad based on the reception state information input from the tuner 311. Further, the receiving device 31 includes a screen configuration determining unit 3313 that determines whether to switch the video to be displayed based on program data included in the received broadcast wave and the reception state.
When the screen configuration determination unit 3313 determines to switch the video to be displayed, the screen configuration determination unit 3313 acquires the communication content from the server device 21 and generates a video of a GUI screen to be displayed on the video display unit 318 by superimposing on the broadcast video. To generate GUI screen data.

With this configuration, for example, broadcast waves are attenuated (rainfall attenuation) by rainfall if broadcast data by the hierarchical transmission method can selectively receive program data of the secondary broadcast (for example, rainfall-response broadcast) simultaneously with the main broadcast. When it is detected that the reception condition of the broadcast wave is poor, such as when switching to the sub broadcast (it is possible to view even if the reception condition is poor), the poor reception condition But you can continue watching.
Also, with this configuration, communication contents such as program related information related to the broadcast program being received in the space of the margin on the video display unit 318 resulting from switching to sub broadcast that has a smaller video size than the main broadcast. Can be displayed. As a result, it is possible to provide the viewer with an image utilizing the height of the resolution and the size of the screen that the digital television receiver originally has.

Second Embodiment
A second embodiment of the present invention will be described.
When the receiving device 31 according to the first embodiment determines that the reception state is poor, the display of the video of the main broadcast reduces the display of the video of the main broadcast to a video of the sub broadcast (for example, a broadcast corresponding to rainfall). It switched automatically to the display of the image | video on which the imaging | video (GUI screen) based on communication content (for example, program relevant information) was superimposed.

  However, depending on the viewer, depending on the genre of the program, it may be considered that the video does not necessarily have to be displayed with good image quality. For example, a viewer may watch on a portable small terminal while moving, or may watch a television while operating an Internet terminal, so-called "while watching". For example, the genre of the program may be an animation or a news program which is not required to be displayed in high quality, or a music program whose sound is more important to the viewer than the video. In such a case, it may be assumed that there is a viewer who wants to continue watching on the large screen without switching to the reduced screen and even if the image quality is deteriorated.

In the second embodiment, when the screen configuration determination unit 3313 receives the reception status information indicating that the reception status is poor, the video display method is determined by the selection by the viewer himself. In other words, the viewer himself should either switch to the reduced image which is the original size of the video for the rainfall compatible broadcast, or display the video for the rainfall compatible broadcast as enlarged according to the size of the video display unit 318 The embodiment determined by the selection according to will be described.
The description of parts in common with the first embodiment will be partially omitted.

(Configuration of receiver)
The configuration of the receiving device 31 will be described using FIG.
The control unit 331 controls various operations of the receiving device 31. For example, the control unit 331 acquires, from the tuner 311, reception state information of a broadcast wave being received. The control unit 331 recognizes whether the acquired reception state information has a value higher than a predetermined reference value (the reception state is good) or a low value (the reception state is inferior). . In addition, for example, when a high resolution video such as 4K / 8K video is displayed on the video display unit 318, does the predetermined reference value reach the intensity level of the received signal that can be viewed comfortably? It is a standard value which shows whether or not.

  Also, for example, from the configuration information input from the separation unit 313, the control unit 331 is a hierarchy in which video data of a plurality of resolutions in one program and audio data of a plurality of reproduction methods in one program are provided. Detect the presence of transmission type broadcasts. In addition, in the broadcast using the hierarchical transmission method, for example, there is a rainfall-compatible broadcast that simultaneously broadcasts the same program as the main broadcast and the sub-broadcast with lower resolution and lower sound quality, as a measure for attenuation of broadcast waves due to rainfall. .

Also, for example, when the control unit 331 recognizes that the received signal level is lower than the reference value (the reception state is poor), and detects the presence of the rainfall compatible broadcast, the viewer may receive rainfall. Data of a notification screen indicating that the hierarchical transmission scheme is to be switched to the corresponding broadcast is generated. The notification screen is generated by acquiring from the storage unit 341 data indicating a notification message stored in the storage unit 341 and a selection button image of the video display layout.
In the notification screen data in this case, for example, "Switch the image to the rain compatible broadcast. Please select the display mode. <Click to enlarge the rainfall compatible broadcast><View the rainfall compatible broadcast and program related content It is GUI screen data that displays ">". "Please switch the image to broadcast compatible with rainfall. Please select the display mode." Is a notification message, <View the enlarged broadcast compatible with rainfall> and <View the broadcast compatible with broadcast and program related content> respectively It represents the wording described in the selection button image of the image display layout.

  The storage unit 341 stores various data. The storage unit 341 is a storage medium, such as a hard disk drive (HDD), a flash memory, a read only memory (ROM), a random access read / write memory (RAM), or any memory thereof. It is composed including the combination of

The control unit 331 outputs GUI screen data indicating the notification screen to the GUI combining unit 317. The GUI combining unit 317 superimposes GUI screen data indicating a notification screen on the video data input from the video decoding unit 316 and causes the video display unit 318 to display the superimposed screen data. The viewer refers to the notification screen displayed on the video display unit 318, and either <views enlarged for the rainfall-compatible broadcast> or <views the rainfall-compatible broadcast and the program related content> through the operation input unit 332. It is possible to select a button image.
The operation input unit 332 acquires an operation signal generated by receiving an operation input from the viewer, and outputs the acquired operation signal to the control unit 331.

  The operation signal generated by the operation input unit 332 includes, for example, a signal indicating power on / off and a signal indicating a channel of a broadcast wave. The operation input unit 332 is, for example, an input interface that receives an operation signal from an electronic device such as an operation button, a remote controller, or a portable terminal device.

  The control unit 331 outputs a mode selection signal to the video decoding unit 316 when the operation signal input from the operation input unit 332 is an operation signal indicating <enlarged viewing of the rainfall compatible broadcast>. The scheme selection signal is a signal indicating that the same program as the main broadcast is switched to a secondary broadcast (that is, a broadcast corresponding to rainfall) by the hierarchical transmission scheme and with lower resolution and sound quality, and that it is compatible with the rainfall This is a signal indicating that the broadcast is enlarged and displayed to the size of the video display area of the video display unit 318 (for example, the video display area of FIG. 13A).

  When the operation signal input from the operation input unit 332 is an operation signal indicating <showing a rainfall compatible broadcast and a program related content>, the control unit 331 performs an audio decoding unit 314 on the method selection signal and an image decoding Output to the part 316. The scheme selection signal is a signal indicating that the same program as the main broadcast is to be switched to a sub broadcast (that is, a broadcast corresponding to rainfall) to be broadcast with a lower resolution and lower sound quality by a hierarchical transmission scheme. Further, the control unit 331 causes the communication unit 321 to transmit a communication content request signal to the server device 21 by communication in order to obtain data indicating communication content including program related information related to the received broadcast program. .

  The control unit 331 causes the communication unit 321 to acquire data indicating the communication content received from the server device 21. The control unit 331 outputs the acquired communication content (including program related information related to the received broadcast program) to the GUI combining unit 317.

(Configuration of control unit)
For example, when receiving reception state information indicating that the reception state is poor, the configuration information decoding unit 3312 acquires two sets of configuration information of the main broadcast and the sub broadcast, for example, as in the above example. When this is the case, as described above, data of a notification screen indicating that the hierarchical transmission scheme is to be switched to the rainfall compatible broadcast to the viewer is generated. The notification screen is generated by acquiring from the storage unit 341 data indicating the notification message and the video display layout selection button image stored in the storage unit 341.
In the notification screen data in this case, for example, "Switch the image to the rain compatible broadcast. Please select the display mode. <Click to enlarge the rainfall compatible broadcast><View the rainfall compatible broadcast and program related content It is GUI screen data for generating a video of a GUI screen that displays ">". Of these, "Switch video to rainfall compatible broadcast. Please select a display mode." Is a notification message, <view to enlarge the rainfall compatible broadcast> and <view the rainfall compatible broadcast and program related content> Each represents the wording described in the image display layout selection button image.

The screen configuration determination unit 3313 outputs GUI screen data indicating the notification screen to the GUI combining unit 317.
The screen configuration determination unit 3313 acquires an operation signal input by the viewer through the operation input unit 332. The operation signal to be input is an operation signal indicating that the image display layout selection button image of either <View to enlarge the rainfall compatible broadcast> or <View the rainfall compatible broadcast and the program related content> is selected. is there.

  The screen configuration determination unit 3313 outputs a mode selection signal to the video decoding unit 316 when the operation signal input from the operation input unit 332 is an operation signal indicating <enlarged viewing of the rainfall-compatible broadcast>. Do. The scheme selection signal is a signal indicating that the same program as the main broadcast is switched to a secondary broadcast (that is, a broadcast corresponding to rainfall) by the hierarchical transmission scheme and with lower resolution and sound quality, and that it is compatible with the rainfall It is a signal indicating that the broadcast is enlarged and displayed to the size of the video display area included in the video display unit 318.

  When the operation signal input from the operation input unit 332 is an operation signal indicating <watch for rainfall compatible broadcast and program related content>, the screen configuration determination unit 3313 sends a mode selection signal to the video decoding unit 316. Output. The scheme selection signal is a signal indicating that the same program as the main broadcast is to be switched to a sub broadcast (that is, a broadcast corresponding to rainfall) to be broadcast with a lower resolution and lower sound quality by a hierarchical transmission scheme. Further, the screen configuration determination unit 3313 outputs a communication content request signal from the communication content acquisition unit 3314 to the communication unit 321 in order to acquire data indicating communication content including program related information related to the received broadcast program. Do.

  The screen configuration determination unit 3313 causes the communication unit 321 to acquire data indicating the communication content transmitted by the server device 21 through communication. The screen configuration determining unit 3313 outputs data indicating the acquired communication content (including program related information related to the received broadcast program) to the GUI combining unit 317.

(Operation of receiver)
Next, the operation of the receiving device 31 will be described.
FIG. 15 is a flowchart showing the operation of the receiving apparatus according to the second embodiment of the present invention.
In the flowchart, the process is started when the separating unit 313 separates the decoded multiplexed data input from the decoding unit 312 into program data and configuration information.

(Step S201) The separation unit 313 detects an MPT from the multiplexed data decoded by the decoding unit 312, and separates the detected MPT. The configuration information decoding unit 3312 of the control unit 331 acquires the MPT from the separation unit 313, and refers to an asset group descriptor (Asset_Group_Descriptor ()) included in the MPT. The configuration information decoding unit 3312 detects the value set at the selection level (selection_level) of the asset group descriptor (Asset_Group_Descriptor ()). Then, it progresses to S102.

(Step S202)
If the value set for the selection level (selection_level) is “0” (default), the process returns to step S201. The case where the value is “0” indicates that the video included in the asset is the video of the main broadcast.
If the value set at the selection level (selection_level) is not “0”, the process proceeds to step S203. When the value is not "0", that is, when the value is "1" or more, it indicates that the video included in the asset is a video of a sub broadcast (for example, a broadcast corresponding to rainfall) .

(Step S203)
The reception level detection unit 3311 acquires the reception state information input from the tuner 311, and confirms whether the reception state indicated by the reception state information is good or bad. Thereafter, the process proceeds to step S204.
(Step S204)
The reception level detection unit 3311 determines the reception state based on the confirmed reception state information.
If the reception state is poor, the process proceeds to step S105. If the reception state is good, the process returns to step S201.

(Step S205)
The control unit 331 generates data of a notification screen for notifying the viewer that the hierarchical transmission scheme should be switched to the rainfall compatible broadcasting. The notification screen is generated by acquiring the notification message stored in the storage unit 341 from the storage unit 341.
In the notification screen data in this case, for example, “switch the video to the rain compatible broadcast to the video display unit 318. Please select the display mode. <Expanding the rain compatible broadcast>< It is GUI screen data for displaying “view program related content>”. The GUI combining unit 317 notifies the viewer by superimposing a video of GUI screen data indicating the generated notification screen on a broadcast video and displaying the video on the video display unit 318. Thereafter, the process proceeds to step S206.

(Step S206)
The screen configuration determination unit 3313 acquires an operation signal input by the viewer through the operation input unit 332. The operation signal to be input is an operation signal indicating that the image display layout selection button image of either <View to enlarge the rainfall compatible broadcast> or <View the rainfall compatible broadcast and the program related content> is selected. is there.
If the operation signal input from the operation input unit 332 is an operation signal indicating <enlarged viewing of the rainfall-compatible broadcast>, the process proceeds to step S209.
If the operation signal input from the operation input unit 332 is an operation signal indicating <view rainfall compatible broadcast and program related content>, the process proceeds to step S207.

(Step S207)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a scheme selection signal indicating switching to the video of the sub broadcast (for example, rainfall compatible broadcast). The video decoding unit 316 switches the video data to be output to the GUI combining unit 317 from the main broadcast to the sub broadcast. Thereafter, the process proceeds to step S208.

(Step S208)
The communication content acquisition unit 3314 transmits a communication content request signal to the server device 21 via the communication unit 321. The communication content acquisition unit 3314 acquires data indicating communication content (for example, program related information) from the server device 21. The screen configuration determination unit 3313 outputs data indicating the communication content acquired by the communication content acquisition unit 3314 to the GUI combining unit 317.
The GUI combining unit 317 displays a video (GUI screen based on the data of the communication content in the margin portion of the screen generated by switching to the video of the sub broadcast (for example, the rainfall corresponding to the rain) reduced from the video of the main broadcast. The video of the GUI screen data is superimposed on the broadcast video of the sub broadcast so as to be displayed on the video display unit 318. Thereafter, the process shown in FIG. 15 is ended.

(Step S209)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a scheme selection signal indicating switching to the video of the sub broadcast (for example, rainfall compatible broadcasting), and the video data output to the GUI combining unit 317 , From the main broadcast to the sub broadcast.
Further, the GUI combining unit 317 enlarges the video of the sub broadcast (having a resolution lower than that of the main broadcast) to the size of the video display area included in the video display unit 318 and causes the video display unit 318 to display it. Thereafter, the process shown in FIG. 15 is ended.

  As described above, in the receiving apparatus 31 according to the second embodiment of the present invention, among the received configuration information, the presence of a plurality of program data of the same broadcast program but different in video resolution from the MPT. A configuration information decoding unit 3312 that detects Further, the receiving device 31 includes a reception level detection unit 3311 that determines whether the reception state is good or bad based on the reception state information input from the tuner 311. Further, the receiving device 31 includes a screen configuration determining unit 3313 that determines whether to switch the video to be displayed based on program data included in the received broadcast wave and the reception state.

  When determining that the video to be displayed is to be switched, the screen configuration determining unit 3313 generates a notification screen for causing the viewer to select the video display mode. The screen configuration determination unit 3313 controls the GUI combining unit 317 based on the signal by the viewer's operation input.

When the signal by the viewer's operation input is a signal indicating that the sub broadcast is enlarged and displayed, the screen configuration determination unit 3313 causes the GUI combining unit 317 to set the size of the video display area included in the video display unit 318 Control is performed so that the video of the sub broadcast is enlarged and displayed on the video display unit 318.
When the signal by the viewer's operation input is a signal indicating that the sub broadcast and the communication content such as the program related information are to be displayed, the screen configuration determination unit 3313 acquires data indicating the communication content from the server device 21. Then, GUI screen data for generating a video of a GUI screen to be displayed on the video display unit 318 by being superimposed on the video of the sub broadcast is generated.

With this configuration, for example, broadcast waves are attenuated (rainfall attenuation) by rainfall if broadcast data by the hierarchical transmission method can selectively receive program data of the secondary broadcast (for example, rainfall-response broadcast) simultaneously with the main broadcast. When it is detected that the reception condition of the broadcast wave is poor such as when the video is displayed, the display method of the video is determined by the selection by the viewer himself.
In other words, the communication content is displayed by switching to the reduced image which is the original size of the image of the rainfall compatible broadcast, or the video of the rainfall compatible broadcast is enlarged according to the size of the video display unit 318 The decision is made by the viewer's own choice as to whether to display it. As a result, it is possible to provide the viewer with an image utilizing the height of the resolution and the size of the screen that the digital television receiver originally has.

  In the second embodiment, not only two types of main broadcast and sub broadcast but also three or more types of broadcast may be included. For example, if the parameter value of the selection level (selection_level) included in the asset group descriptor (Asset_Group_Descriptor ()) is larger, the parameter value is more correlated by indicating that the resolution is lower. It can be seen that the size of the broadcast image area decreases as the size increases. That is, it can be seen that, conversely, the display area where the communication content can be displayed becomes larger.

  Therefore, the data amount of the communication content to be acquired may be changed according to the numerical value of the parameter value of the selection level (selection_level). As the parameter value of the selection level (selection_level) is larger, more communication content data is acquired from the server device 21 and information based on more communication content is displayed in the communication content display area. .

Third Embodiment
A third embodiment of the present invention will be described.
In the first and second embodiments, generation of a video by superimposing a video of communication content on broadcast video has been described. The generation of the video combining the broadcast video and the video of the communication content may be realized by activating an application of the broadcast communication cooperation service.

Recently, as a new broadcast communication cooperation service, for example, there is a service using Hybridcast (registered trademark). Hybridcast is a basic technology for superimposing video of communication content on video of broadcast content to make one video and displaying the video on the display of a Hybridcast-compatible digital television receiver.
In the third embodiment, when the screen configuration determination unit 3313 receives reception state information indicating that the reception state is poor, is the application of the broadcast communication cooperation service (for example, Hybridcast (registered trademark)) activated? An embodiment in which the viewer is made to select whether or not to pass will be described.
Note that descriptions of parts in common with the first embodiment and the second embodiment will be partially omitted.

  In the broadcast communication cooperation service (for example, Hybridcast (registered trademark)) realized by the broadcast system according to the third embodiment, the application information is stored based on an application information table (AIT) storing information of the application. Control activation. In a broadcast system using MMT as a multiplexing method, MH-AIT (Mpeg-H-Application Information Table; MH-application information table) which is control information having the same function as AIT can be used. That is, the receiver of the broadcast system using MMT as the multiplexing system controls the activation of the application based on the MH-AIT.

  MH-AIT is one of the data contained in the configuration information received by the receiving device 31 as in the MPT. In the receiver 31 of the broadcast system 1 according to the third embodiment, the activation of the application is controlled based on the information included in the MH-AIT.

(Data structure of MH-AIT)
Next, an example of MH-AIT data included in the configuration information will be described. MH-AIT is ARIB (Association of Radio Industries)
and Businesses: A standard set forth in Non-Patent Document 3).
FIG. 16 is a view showing an example of the data structure of the MH-AIT included in the configuration information received by the receiving apparatus according to this embodiment. In the example illustrated in FIG. 16, the MH-AIT includes an application type (application_type), an application identifier (application_identifier ()), and an application control code (application_control_code). Note that rpchof (remainder polynomial coefficients highest order first) described in FIG. 16 means that the coefficients of the multiplicative polynomial are arranged in descending order of the degree.

The application type (application_type) indicates the type of application to be controlled by the AIT.
FIG. 17 is a diagram illustrating an example of the value of the application format (application_type) included in the configuration information received by the receiving device according to the present embodiment. For example, when the value of the application format (application_type) is “0x0010”, it indicates that the format of the application to be controlled by the AIT is “broadcast communication cooperation HTML 5 application”.

  The application identifier (application_identifier ()) is a value that uniquely identifies an application. This value is defined for each application type.

The application control code (application_control_code) is an 8-bit field that defines a control code that controls the state of the application. The application control code (application_control_code) is encoded according to FIG.
FIG. 18 is a diagram showing an example of the value of the application control code (application_control_code) included in the configuration information received by the receiving device according to the present embodiment. For example, the state control of the application performed when the value of the application control code (application_control_code) is “0x01” indicates “AUTOSTART”, that is, starting the application.

(Operation of receiver)
The operation of the receiving device 31 will be described.
FIG. 19 is a flowchart showing the operation of the receiving apparatus according to the third embodiment of the present invention.
In the flowchart, the process is started when the separating unit 313 separates the decoded multiplexed data input from the decoding unit 312 into program data and configuration information.

(Step S301) The separation unit 313 detects an MPT from the multiplexed data decoded by the decoding unit 312, and separates the detected MPT. The configuration information decoding unit 3312 of the control unit 331 acquires the MPT from the separation unit 313, and refers to the asset group descriptor (Asset_Group_Descriptor ()) included in the MTP. The configuration information decoding unit 3312 detects the value set at the selection level (selection_level) of the asset group descriptor (Asset_Group_Descriptor ()). Then, it progresses to S302.

(Step S302)
If the value set at the selection level (selection_level) is “0” (default), the process returns to step S101. The case where the value is “0” indicates that the video included in the asset is the video of the main broadcast.
If the value set at the selection level (selection_level) is not “0”, the process proceeds to step S303. When the value is not "0", that is, when the value is "1" or more, it indicates that the video included in the asset is a video of a sub broadcast (for example, a broadcast corresponding to rainfall) .

(Step S303)
The reception level detection unit 3311 acquires the reception state information input from the tuner 311, and confirms whether the reception state indicated by the reception state information is good or bad. Thereafter, the process proceeds to step S304.
(Step S304)
The reception level detection unit 3311 determines the reception state based on the confirmed reception state information.
If the reception status is poor, the process proceeds to step S305. If the reception state is good, the process returns to step S301.

(Step S305)
The control unit 331 generates data of a notification screen for notifying the viewer that the hierarchical transmission scheme should be switched to the rainfall compatible broadcasting. The notification screen is generated by acquiring the notification message stored in the storage unit 341 from the storage unit 341.
In the notification screen data in this case, for example, it is displayed on the video display unit 318 as "Switch video to rain compatible broadcast. Do you want to start the broadcast communication cooperation service? <Yes><No>" It is GUI screen data. The GUI combining unit 317 notifies the viewer by superimposing a video of GUI screen data indicating the generated notification screen on a broadcast video and displaying the video on the video display unit 318. Thereafter, the process proceeds to step S306.

(Step S306)
The screen configuration determination unit 3313 acquires an operation signal input by the viewer through the operation input unit 332. With the operation signal to be input, the service activation selection button image of either <Yes> (that is, start the broadcast communication cooperation service) or <No> (that is, not start the broadcast communication cooperation service) is selected It is an operation signal which shows that.
If the operation signal input from the operation input unit 332 is an operation signal indicating <Yes>, the process proceeds to step S307.
If the operation signal input from the operation input unit 332 is an operation signal indicating <No>, the process proceeds to step S309.

(Step S307)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a scheme selection signal indicating switching to the video of the sub broadcast (for example, rainfall compatible broadcast). The video decoding unit 316 switches the video data to be output to the GUI combining unit 317 from the main broadcast to the sub broadcast. Thereafter, the process proceeds to step S308.

(Step S308)
The screen configuration determination unit 3313 executes the broadcast communication cooperation service stored in the storage unit 341 based on the application control information indicated by the MH-AIT, which is one of the configuration information decrypted by the configuration information decryption unit 3312. Read the application you want to launch and start the application. The application operates in the screen configuration determination unit 3313. The application transmits a communication content request signal to the server device 21 via the communication unit 321.

  The application acquires, from the server device 21, data indicating communication content used in the broadcast communication cooperation service. The application outputs data indicating communication content used in the broadcast communication cooperation service to the GUI synthesis unit 317. The GUI combining unit 317 superimposes a video (GUI screen) based on data of communication content of the broadcast communication cooperation service on a sub broadcast (for example, rainfall compatible broadcast) reduced from the video of the main broadcast, and displays the video display unit Display on 318. Thereafter, the process shown in FIG. 16 is ended.

(Step S309)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a scheme selection signal indicating switching to the video of the sub broadcast (for example, rainfall compatible broadcasting), and the video data output to the GUI combining unit 317 , From the main broadcast to the sub broadcast.
Further, the GUI combining unit 317 enlarges the video of the sub broadcast (having a resolution lower than that of the main broadcast) to the size of the video display area included in the video display unit 318 and causes the video display unit 318 to display it. Thereafter, the process shown in FIG. 16 is ended.

  As described above, data of communication content to be acquired according to the numerical value of the parameter value of the selection level (selection_level) set in the asset group descriptor (Asset_Group_Descriptor ()) of the MPT included in the configuration information It may be configured to change the amount. That is, as the display area of the broadcast video becomes smaller, the display area for displaying the communication content of the broadcast communication cooperation service is made larger.

  As described above, the receiving device 31 according to the third embodiment of the present invention determines whether to switch the video to be displayed based on the program data included in the received broadcast wave and the reception state. A screen configuration determination unit 3313 is provided. When determining that the video to be displayed is to be switched, the screen configuration determining unit 3313 generates a notification screen for causing the viewer to select the video display mode. The screen configuration determination unit 3313 controls the GUI combining unit 317 based on the signal by the viewer's operation input.

When the signal by the viewer's operation input is a signal indicating that the sub broadcast is enlarged and displayed, the screen configuration determination unit 3313 causes the GUI combining unit 317 to set the size of the video display area included in the video display unit 318 Control is performed so that the video of the sub broadcast is enlarged and displayed on the video display unit 318.
When the signal by the viewer's operation input is a signal indicating that the broadcast communication cooperation service is activated, the screen configuration determination unit 3313 executes an application for executing the broadcast communication cooperation service. Then, the reception device 31 causes the video display unit 318 to display the sub broadcast and the communication content in combination according to the broadcast communication cooperation service. The broadcast communication cooperation service is, for example, Hybridcast (registered trademark).

With this configuration, for example, broadcast waves are attenuated (rainfall attenuation) by rainfall if broadcast data by the hierarchical transmission method can selectively receive program data of the secondary broadcast (for example, rainfall-response broadcast) simultaneously with the main broadcast. When it is detected that the reception condition of the broadcast wave is poor such as when the video is displayed, the display method of the video is determined by the selection by the viewer himself.
That is, the broadcast cooperation service is activated by switching to the reduced image which is the original size of the video for the rainfall compatible broadcast, or the video for the rainfall compatible broadcast is enlarged and displayed in accordance with the size of the video display unit 318 The decision is made by the viewer's own choice as to whether to make it happen.
As a result, it is possible to provide the viewer with an image utilizing the height of the resolution and the size of the screen that the digital television receiver originally has.

  In the third embodiment, not only the main broadcast and the sub broadcast but also three or more broadcasts may be included in the third embodiment as in the above-described embodiment. For example, if the parameter value of the selection level (selection_level) included in the asset group descriptor (Asset_Group_Descriptor ()) is larger, the parameter value is more correlated by indicating that the resolution is lower. It can be seen that the size of the broadcast image area decreases as the size increases. That is, it can be seen that, conversely, the display area where the communication content can be displayed becomes larger.

  Therefore, the data amount of the communication content to be acquired may be changed according to the numerical value of the parameter value of the selection level (selection_level). The configuration is such that, as the parameter value of the selection level (selection_level) is larger, more communication content data is acquired from the server device 21 and the broadcast communication cooperation service application displays information based on more communication content. It is.

Fourth Embodiment
A fourth embodiment of the present invention will be described.
In the third embodiment, the application of the broadcast communication cooperation service operating in the receiving device 31 determines the communication content to be displayed based on the configuration information including the information indicating the resolution of the broadcast video and the like.
In the fourth embodiment, for example, when a broadcaster transmits a broadcast wave, the amount of information suitable for the selection level (selection_level) set in the asset group descriptor (Asset_Group_Descriptor ()) of MPT included in the configuration information The communication content of the above is stored in advance in the server device 21.

Pre-storing communication content of an amount of information suitable for the set selection level (selection_level) is as follows.
As the parameter value of the selection level (selection_level) is larger, the resolution of the broadcast video is shown to be lower as the parameter value is larger. As the parameter value is larger, the display area of the communication content becomes larger. Therefore, as the display area is larger, the information content of the communication content to be displayed is also increased, or the communication content of the information amount suitable for the display area is prepared and stored in the server device 21 in advance. Make it

  According to this configuration, it is possible to provide the viewer with an image utilizing the height of the resolution and the size of the screen that the digital television receiver originally has.

Fifth Embodiment
A fifth embodiment of the present invention will be described.
In the first to fourth embodiments, the embodiments have been described in which the video of the main broadcast and the video of the sub broadcast (for example, the rainfall-responsive broadcast) are switched by switching the hierarchical transmission method. However, the broadcast is not limited to the hierarchical transmission scheme. That is, multiple broadcasts of the same broadcast program may be simultaneously performed at different resolutions or the like. For example, when the same broadcast program is broadcasted at a plurality of resolutions, etc. by simulcast (also called simultaneous broadcast) provided by broadcast waves, the broadcast to be received is switched based on the reception state An embodiment is also possible.
According to this configuration, it is possible to provide the viewer with an image utilizing the height of the resolution and the size of the screen that the digital television receiver originally has.

Sixth Embodiment
A sixth embodiment of the present invention will be described.
In the fifth embodiment, the reception is switched to the simulcast provided by the broadcast wave. However, it is not limited to the broadcast provided by the broadcast wave. For example, the embodiment may be such that the receiving device 31 receives the same broadcast program by communication from the server device 21 via the communication transmission path 22. In addition, when delivering the thing of the same content as the broadcast by an electromagnetic wave on IP networks, such as the internet, it is also called IP simulcast. The receiving apparatus 31 can receive the same broadcast program from the server apparatus 21 by communication even when reception is difficult even in low resolution broadcasting by the hierarchical transmission method due to heavy rainfall or the like.
According to this configuration, it is possible to provide the viewer with an image utilizing the height of the resolution and the size of the screen that the digital television receiver originally has.

The embodiment of the present invention has been described in detail, but the specific configuration is not limited to the above-described one, and various design changes can be made without departing from the scope of the present invention. is there.
For example, the broadcast system 1 according to the above-described embodiment is a broadcast system related to a broadcast with 4K / 8K video, that is, a video system using MMT as a multiplexing method, but is not limited thereto. For example, the broadcast system 1 according to another embodiment may be a broadcast system using TS (Transport Stream) as a multiplexing method.

In addition, although program relevant information was illustrated as an example of communication contents in the above-mentioned embodiment, it is not restricted to this.
The communication content may be, for example, content such as weather information or traffic information that provides information related to the weather when the reception is switched to the rainfall compatible broadcasting.
The communication content may be content including information related to the genre of the program to which the broadcast program belongs regardless of program related information directly related to the broadcast program being viewed. For example, if the broadcast program being viewed is a movie, contents such as information related to the genre of the movie, for example, information on a service provided by a rental DVD provider, and information on a service provided by an on-demand broadcaster It may be

  Moreover, the content to be superimposed and displayed on the video of the broadcast program may not be the content received through communication. The content may be information based on information included in other configuration information of a broadcast wave, for example, data included in data broadcast or data of an EPG (Electronic Program Guide; electronic program guide). In addition, it may be acquisition of content (offline content) not accompanied by reception by broadcast or communication, for example, content stored in advance in the storage unit 341.

  In addition, for example, when a movie program is being broadcast, a scene (timing) that has been switched to the rainfall-compliant broadcast may be recorded, and the content may be displayed. As a result, the viewer can grasp to which scene the normal (high resolution) broadcast video can be viewed, and therefore, once the broadcast has been switched to the rainfall compatible broadcast, the program viewing is temporarily ended. Later, viewing can be resumed from the subsequent scene by a rental DVD, on-demand broadcasting, rebroadcasting, or the like.

  Also, the communication content may be an application, content, or the like that can facilitate communication between viewers, such as a social networking service (SNS), a social game, a bulletin board, or the like.

(A1) One aspect of the present invention determines a hierarchy based on a demodulation unit that demodulates a received signal, and an error rate of a high hierarchy of the received signal, and the presence or absence of hierarchical modulation by an asset group descriptor of an MMT package table And a processing unit that acquires an asset classified by hierarchy, and the processing unit is a receiving device that determines a hierarchy to be transmitted based on an asset group descriptor of the MMT package table.

(A2) One aspect of the present invention determines a hierarchy based on a demodulation unit that demodulates a received signal, and an error rate of a higher hierarchy of the received signal, and the presence or absence of hierarchical modulation by an asset group descriptor of an MMT package table And a processing unit that acquires an asset classified by hierarchy, and the processing unit is a television apparatus that determines a hierarchy to be transmitted based on an asset group descriptor of the MMT package table.

(A3) One aspect of the present invention, in a computer of a receiving apparatus, a demodulation procedure for demodulating a received signal, determining a layer based on a higher layer error rate of the received signal, an asset group descriptor of an MMT package table A program for identifying the presence or absence of hierarchical modulation by the processing procedure to acquire assets by layer, and determining the layer to be transmitted based on the asset group descriptor of the MMT package table in the processing procedure. is there.

(A4) One embodiment of the present invention is a computer readable storage medium storing the program described in (A3).

(A5) One aspect of the present invention is a reception processing method in a reception apparatus, which comprises a demodulation process of demodulating a received signal, determining a layer based on an error rate of a high layer of the received signal, A process of identifying the presence or absence of hierarchical modulation by an asset group descriptor and acquiring an asset by hierarchy is executed, and in the process, a hierarchy to be transmitted based on the asset group descriptor of the MMT package table is It is a reception method to judge.

  Note that a part or all of the transmission device 11, the server device 21, and the reception device 31 in the above-described embodiment may be realized by a computer. In that case, a program for realizing the control function may be recorded in a computer readable recording medium, and the program recorded in the recording medium may be read and executed by a computer system.

  Here, the “computer system” is a computer system built in the transmission device 11, the server device 21, and the reception device 31, and includes an OS and hardware such as peripheral devices. The term "computer-readable recording medium" refers to a storage medium such as a flexible disk, a magneto-optical disk, a ROM, a portable medium such as a ROM or a CD-ROM, or a hard disk built in a computer system.

  Furthermore, the “computer-readable recording medium” is one that holds a program dynamically for a short time, like a communication line in the case of transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case may also include one that holds a program for a certain period of time. The program may be for realizing a part of the functions described above, or may be realized in combination with the program already recorded in the computer system.

  In addition, the transmission device 11, the server device 21, and the reception device 31 in the above-described embodiment may be realized as an integrated circuit such as a large scale integration (LSI). Each functional block of the broadcast system 1 and the base station apparatus 2 may be individually processorized, or part or all may be integrated and processorized. Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible. In the case where an integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology, integrated circuits based on such technology may also be used.

  DESCRIPTION OF SYMBOLS 1 ... broadcast system, 11 ... transmission apparatus, 12 ... broadcast transmission line, 13 ... broadcast satellite, 21 ... server apparatus, 22 ... communication transmission line, 31 ... reception apparatus 111: program data generation unit 112: configuration information generation unit 113: multiplexing unit 114: encryption unit 115: transmission unit 210: control unit 211 Communication content acquisition unit 212 Communication content distribution unit 213 Communication unit 214 Storage unit 311 Tuner 312 Decoding unit 313 Separation unit 314: voice decoding unit 315: voice reproduction unit 316: video decoding unit 317: GUI combining unit 318: video display unit 321: communication unit 331. · · Control unit, 332 · · · Operation input unit, 341 · · · · Storage 3311: reception level detection unit 3312: configuration information decoding unit 3313: screen configuration determination unit 3314: communication content acquisition unit 511a: video display area 511b: video Display area, 521a: main broadcast video, 521b: sub broadcast video, 522: communication content video (GUI screen)

Claims (8)

A demodulation unit that demodulates the received signal;
A processing unit for identifying the presence or absence of hierarchical modulation by the asset group descriptor of the MMT package table, and acquiring an asset for each hierarchy;
Equipped with
The processing unit is
Determine the hierarchy to be transmitted based on the asset group descriptor of the MMT package table,
A receiver for acquiring a table storing information of an application when switching the hierarchy, and performing a service based on the information included in the table. The receiving device according to claim 1, wherein the processing unit starts an application based on the table when switching the hierarchy. The receiving device according to claim 1, wherein the processing unit starts an application for which AUTOSTART is specified when the layer is switched. The receiving apparatus according to any one of claims 1 to 3, wherein the processing unit determines the layer based on an error rate of a high layer of the received signal. A demodulation unit that demodulates the received signal;
A processing unit for identifying the presence or absence of hierarchical modulation by the asset group descriptor of the MMT package table, and acquiring an asset for each hierarchy;
Equipped with
The processing unit is
Determine the hierarchy to be transmitted based on the asset group descriptor of the MMT package table,
The television apparatus which acquires the table which stores the information of an application at the time of the switching of the said hierarchy, and performs a service based on the information contained in the said table. To the computer of the receiving device
Demodulation procedure to demodulate the received signal,
A processing procedure for identifying the presence or absence of hierarchical modulation by the asset group descriptor of the MMT package table, and acquiring an asset for each hierarchy,
To run
In the processing procedure,
Determine the hierarchy to be transmitted based on the asset group descriptor of the MMT package table,
The program which acquires the table which stores the information on application at the time of the change of the hierarchy, and performs service based on the information contained in the table concerned.   A computer readable storage medium storing the program according to claim 6. A reception processing method in the reception apparatus,
A demodulation process for demodulating the received signal,
A process of identifying the presence or absence of hierarchical modulation by the asset group descriptor of the MMT package table, and acquiring an asset for each hierarchy,
To run
In the process,
Determine the hierarchy to be transmitted based on the asset group descriptor of the MMT package table,
At the time of switching of the hierarchy, a table storing information of an application is acquired, and a service is performed based on the information included in the table.

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