JP4510694B2 - Receiving apparatus and content distribution system - Google Patents

Description

The present invention relates to a receiving apparatus and a content distribution system to receive content.

  Conventionally, this type of receiving apparatus receives a plurality of area information included in a digital terrestrial broadcast wave, and based on the received position information including latitude and longitude information acquired by a GPS receiver, the area information corresponding to the received position is obtained. Extraction is made (see, for example, Patent Documents 1 and 2).

JP 2002-280983 A JP 2004-32298 A

  However, since the conventional receiving apparatus is configured to extract the area information corresponding to the reception position based on the reception position information, there is a problem that the load for the reception position information acquisition process increases.

  In addition, in order to transmit a large amount of area information using only terrestrial digital broadcast waves, there is a limit to the transmission capacity at present, so that a conventional receiving apparatus may not be able to receive sufficient area information. Even if the transmission capacity is sufficiently increased in the future, it is necessary to reduce the processing load because the processing for acquiring the area information based on the reception position information on the receiver side involves a large processing load. is there.

  The present invention has been made to solve such a problem, and can receive local content according to the reception position without acquiring reception position information or performing processing that increases the load. An apparatus, a content distribution system for distributing content, a content production method, and a content transmission method are provided.

The receiving device of the present invention is transmitted toward a second area included in the first area, first content receiving means for receiving the first content transmitted toward the first area. Second content receiving means for receiving the second content, and an interrupt event that occurs when the first or the second content is updated to detect the first content and the second content. A control unit that detects an update; a memory unit that stores the first and second contents; and a display unit that displays at least one of the first and second contents. Is the data of the BML document transmitted in the elementary stream that is the entry component of the data carousel transmission method, and the BML sentence across the components. In the elementary stream that can be referred to in a predetermined first content module, and the second content is assigned to the specific first content module by file information indicating the association of the content. A specific second content module associated therewith, and the memory unit uses the same namespace when storing the specific first content module or the specific second content module. , The module of the specific first content or the module of the specific second content that is detected by the control unit, and the display unit is stored in the memory unit It has a configuration for displaying the selected module .

With this configuration, the receiving device of the present invention causes the browser to display the content of the specific first content and the specific second content that has caused the interrupt event on the display unit . It is possible to receive content in a region according to the reception position without performing acquisition or processing that increases the load.

Further, in the receiving device of the present invention, at least one of the first and second contents has predetermined priority information, and the display unit is configured to perform the first and second contents based on the priority information. One of the second content modules is preferentially displayed.

  With this configuration, the receiving device of the present invention can preferentially display either the first content or the second content based on the priority.

Further, in the receiving apparatus of the present invention, the first content is data broadcasting content of digital terrestrial broadcasting, and the second content is narrow-area communication content by narrow-area communication directed to a local area. It has a configuration.

  With this configuration, the receiving apparatus of the present invention can easily execute update processing based on interrupt processing used in terrestrial digital broadcasting.

  The content distribution system according to the present invention includes a receiving device, a first content distribution facility that distributes the first content, and a second content distribution facility that distributes the second content. ing.

  With this configuration, the content distribution system of the present invention can cause the receiving device to automatically perform update processing by merging the first content and the second content. Without causing the receiving apparatus to perform the process of increasing the content, it is possible to cause the receiving apparatus to receive the content in the area corresponding to the reception position.

Further, in the content distribution system of the present invention, the second content distribution facility transmits the second content data unique to each region for each of the plurality of regions included in the second area. A plurality of antennas, and at least one data distribution facility that distributes the data of the second content via the plurality of antennas, the data distribution facility has position information for each of the plurality of regions, Based on the position information, the second content unique to the region is distributed for each of the plurality of regions .

  With this configuration, the content distribution system of the present invention can distribute content for each region based on the received position information such as the latitude and longitude information of the region, address information, and postal code information.

The present invention can provide a receiving apparatus and a content distribution system that receives position without performing the increasing process of obtaining and load information, can receive the contents of the area corresponding to the reception position is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the structure of the receiving apparatus of this Embodiment is demonstrated using FIG. FIG. 1 is a block diagram of a receiving apparatus according to this embodiment. In addition, the receiving apparatus of this Embodiment is mounted in a vehicle, the terrestrial digital broadcast wave transmitted toward a wide area, and the DSRC (Dedicated Short Range Communication) transmitted toward a local area An example of receiving a communication signal will be described.

  As shown in FIG. 1, a receiving apparatus 10 according to the present embodiment includes a broadcast receiving demodulation unit 11 that receives and demodulates digital terrestrial broadcast waves, a DSRC reception decoding unit 12 that receives and decodes DSRC signals, and a data broadcasting use. Of the content (hereinafter referred to as “data broadcast content”), a broadcast receiving demodulation unit 11 and a decoding unit 14 for decoding data from the memory unit 13, and signals from the decoding unit 14 are monitored (illustrated). (Not shown), and a control unit 16 that controls the operation of the entire apparatus.

  The broadcast reception demodulation unit 11 includes an antenna that receives a terrestrial digital broadcast wave, a tuner that selects the received broadcast wave, a demodulation circuit that demodulates the selected broadcast wave, and a plurality of multiplexed transports A filter that extracts a predetermined stream from the stream, downloads the data broadcast content file included in the digital terrestrial broadcast wave, stores the file in the memory unit 13, and outputs the data of the video signal and the audio signal to the decoding unit 14. It is like that. The broadcast receiving / demodulating unit 11 constitutes a first content receiving means of the present invention.

  The DSRC reception decoding unit 12 includes an antenna that receives a DSRC signal, a decoding circuit that decodes the DSRC signal, and the like, and downloads data broadcast content files included in the DSRC signal and stores them in the memory unit 13. ing. The DSRC receiving / decoding unit 12 constitutes a second content receiving means of the present invention.

  The memory unit 13 is composed of, for example, a semiconductor memory, and accumulates data broadcast contents output from the broadcast reception demodulation unit 11 and the DSRC reception decoding unit 12, respectively. The memory unit 13 constitutes content storage means of the present invention.

  The decoding unit 14 includes, for example, a CPU (Central Processing Unit), a ROM (Read-Only Memory), a RAM (Random-Access Memory), and the like, and includes a video decoder, an audio decoder, and a data recorder. The video decoder and the audio decoder decode the data of the video signal and the audio signal output from the broadcast receiving / demodulating unit 11, respectively, and the data recorder decodes the data output from the memory unit 13.

  The display unit 15 includes, for example, a CPU, a ROM, a RAM, a frame memory, a video signal processing circuit, an audio amplification circuit, and the like, and outputs the video signal, audio signal, and data broadcast content output from the decoding unit 14 to a monitor. It has become.

  The control unit 16 includes, for example, a CPU, a ROM, a RAM, and the like, and comprehensively controls each component of the reception device 10. The ROM of the control unit 16 stores a BML browser program for reproducing a BML document, which will be described later, and the BML document is reproduced by the CPU. The control unit 16 constitutes content merging means and content updating means of the present invention.

  Although not shown, the receiving apparatus 10 according to the present embodiment constitutes a content distribution system including a terrestrial digital broadcast station facility that transmits terrestrial digital broadcast waves and a DSRC broadcast station facility that transmits DSRC signals. To do. In this case, the terrestrial digital broadcasting station facility and the DSRC broadcasting station facility constitute the first content distribution facility and the second content distribution facility of the present invention, respectively.

  Next, data broadcasting content in DSRC and terrestrial digital broadcasting will be described, the production method and transmission method of the data broadcasting content of the present invention will be specifically described, and the characteristics of the receiving apparatus 10 according to the present embodiment will be described.

  DSRC is one of ITS (Intelligent Transport System) and is a communication method used for road-to-vehicle communication using radio waves or light. Specifically, it is a communication method for a narrow range in which bidirectional communication can be performed at a communication speed of 1 to 4 Mbps by wireless communication using an ASK (Amplitude Shift Keying) modulation method or a four-phase phase modulation method in the 5.8 GHz band. In general, the communicable range is several meters to several hundred meters. The receiving apparatus 10 according to the present embodiment is configured to receive data broadcasting content unique to a region related to a local region transmitted by DSRC. Examples of local data broadcasting contents include weather information and news for a specific area.

  A DSRC system that transmits a DSRC signal according to the present embodiment is configured as shown in FIG. 2, for example. In FIG. 2, the DSRC system 20 includes a broadcasting station equipment 21 that broadcasts data broadcasting contents unique to the area, a communication network 22 connected to the broadcasting station equipment 21, and data in the group A area via the communication network 22. A data distribution facility 23a that distributes data, a data distribution facility 23b that distributes data to the Group B region, a plurality of antennas 24a that transmit signals to the Group A region, and a plurality of signals that transmit signals to the Group B region An antenna 24b is provided, and data broadcasting content unique to the region is distributed to a traveling vehicle in groups.

  The DSRC system can also be configured as shown in FIG. In FIG. 3, the DSRC system 30 includes a broadcasting station facility 31 including a data distribution facility 31 a that distributes data to the areas of groups A and B, a communication network 32 connected to the broadcasting station facility 31, and a communication network 32. A plurality of antennas 33a for transmitting signals to the area of group A and a plurality of antennas 33b for transmitting signals to the area of group B, and responding to requests from the group while centrally managing the contents of the entire group In this way, data broadcasting content unique to the region is distributed to the traveling vehicle.

  Here, in order to associate the data broadcasting content unique to the region with the region of each group, it is preferable to include the position information based on the latitude and longitude information. In this case, the DSRC system needs to determine which data broadcast content is distributed to which group based on the position information. Therefore, for example, by providing the broadcast station equipment 21 or 31 with a table of latitude and longitude information of the area in charge in units of groups, and associating the position information with the group, the broadcast station equipment 21 or 31 It is possible to easily determine to which group the data broadcasting content unique to the region should be distributed.

  As a method for associating the position information with the group, not only the position information and the group may be directly associated, but also the association may be performed through a certain intermediate format, for example, address information or postal code information. It should be noted that a configuration may be adopted in which location-specific data broadcasting content is produced and transmitted separately for each group without using location information.

  On the other hand, terrestrial digital broadcasting waves use UHF (Ultra High Frequency) band, and OFDM (Orthogonal Frequency Division Multiplexing) -64QAM (Quadrature Amplitude Modulation) modulation is used as a transmission method. The terrestrial digital broadcast wave includes video signal and audio signal data transmitted over the entire broadcast area, data broadcast content transmitted over the entire broadcast area, and control information for displaying them on the display device. . The description language of data broadcasting contents of digital terrestrial broadcasting is XML (Broadband Language) based page description language based on XML (extensible Markup Language) formulated by ARIB (Association of Radio Industries and Businesses). Is used. A file described in BML is referred to as a BML document. It should be noted that a predetermined interrupt event occurs when the content is updated during playback of the BML document.

  In terrestrial digital broadcasting, a data carousel transmission system of MPEG (Moving Picture Experts Group) -2 is used for transmission of data broadcasting contents. Here, the data carousel transmission method means that a predetermined data broadcasting content is repeatedly transmitted in a certain band of data broadcasting for a certain period, so that the viewer can start watching at any given time with a predetermined waiting time. This is a transmission method capable of acquiring content. This system provides viewers with the latest weather forecast information by, for example, repeatedly transmitting and displaying the data broadcast contents of various locations nationwide, such as weather forecasts, predicted temperatures, and weekly weather forecasts, as a set. can do.

  In the data carousel transmission system, a set of a plurality of data repeatedly transmitted is called a carousel, and each data is called a module. The concept of namespace is used to uniquely identify these modules. One carousel corresponds to one component.

  As described above, the transmission method of data broadcast content by terrestrial digital broadcasting (hereinafter referred to as “broadcast content”) is different from the transmission method of data broadcast content by DSRC (hereinafter referred to as “DSRC content”). The version management method and update process of the modules constituting the data broadcast content are also different. Therefore, in order to process both data broadcast contents without increasing the load on the receiver side, it is preferable to make the version management method and update process of both modules the same.

  Therefore, a method for making the module version management method and update processing identical between the broadcast content and the DSRC content will be described.

  The receiving apparatus 10 according to the present embodiment, when expanding the DSRC content received by the DSRC reception decoding unit 12 in the memory unit 13, has the same name as the broadcast content by the data carousel transmission method received by the broadcast reception demodulation unit 11. The DSRC content is converted to be mapped in space, and an interrupt event equivalent to the case where the broadcast content is updated is generated, so that the update processing of the module of the broadcast content and the DSRC content is performed at the application level in the same way. It has a configuration that can.

  Specifically, in digital terrestrial broadcasting, data of a BML document is transmitted by an ES (Elementary Stream) that is an entry component, and data related to the entire broadcast area is transmitted by another ES that can be referenced across components. In addition, the region-specific DSRC content transmitted by the DSRC system is converted and expanded in the memory unit 13 as being transmitted by another ES that can be referenced across components. For example, by assigning a special value to the transmission format value of the data encoding method descriptor of PMT (Program Map Table), it is possible to recognize which ES is to be converted as a transmitted component. It is preferable to do this. The description regarding the transmission format value of the data encoding scheme descriptor of PMT is described in the document “ARIB STD-B24 (4.0 version) Volume 2 9.3.2 Additional identification information area of data encoding scheme descriptor” Information to be described in “.

  In the BML document, the function lockModuleOnMemoryEx () is used to lock and reference a module in the ES that can be referenced across components. At that time, the control unit 16 always monitors the update of the module version of the data broadcast content locked by the above-described function. If there is an update, a Module Updated interrupt event occurs, and the module Is unlocked and locked again. Here, in each component of the data carousel, control information called DII (Download Info Indication) is sent. By monitoring the transaction_id included in this control information, the control unit 16 updates the content in the component. The situation can be acquired. Note that the explanation about the function lockModuleOnMemoryEx () is described in the document “ARIB TR-B14 (2.2 version), third volume 5.12.6.9 Operation of operation control function (6) operation of lockModuleOnMemoryEx (), unlockModuleOnMemoryEx ()”. It is described in.

  Therefore, when the module transmitted by DSRC is expanded in the memory unit 13 by the DSRC reception decoding unit 12, the reception device 10 according to the present embodiment generates control equivalent to the above-described Module Updated interrupt event. The same processing as when the module in the broadcast content is updated can be performed on the DSRC content. The module version information is generally managed separately for each production system of broadcast content and DSRC content, so the receiving device 10 also holds version information of each module and updates it based on this version information. It is preferable that the determination is made. As a result, in the receiving device 10, the broadcast content and the DSRC content automatically update the display of the content every time the content of the module in the ES that can be referenced across components changes. Is possible.

  Here, a specific example is given about the equalization of the update process of a module, and it demonstrates still more concretely using FIG. FIG. 4 shows an example of the structure of broadcast content.

  The broadcast content shown in FIG. 4 includes three carousels having component tag values “40”, “50”, and “60” (hereinafter referred to as “carousels 40, 50, and 60”). In other words, the carousels 40, 50 and 60 are components each having a unique tag value.

  The carousel 40 has modules with module IDs (Identification) “0000”, “0001”, “1000”, and “ff00”. The module whose module ID is “0000” has files whose resource names are “startup.bml”, “2ndPage.bml”, “back.jpg”, and “button.png”. Here, “startup.bml” is a file of a BML document that is first reproduced by the BML browser. The configuration of modules other than the module ID “0000” is not shown.

  The carousel 50 has modules with module IDs “0000” and “0001”. A module with a module ID “0000” has a file with a resource name “weather.bml”, and a module with a module ID “0001” has a file with a resource name “data.btb”. Here, “weather.bml” is a BML document file for displaying national weather forecasts, and “data.btb” is a binary table file for displaying national news articles.

  The configuration of the carousel 60 is not shown. In the broadcast content shown in FIG. 4, “ES that is an entry component” refers to the carousel 40 whose component tag value is “40”. The above-mentioned “another ES that can be referred across components” refers to the carousel 50 or 60 when the carousel 40 is used as a reference. Further, in the following description, for example, when a file “startup.bml” is indicated, it is expressed using a name space “40/0000 / startup.bml”.

  In terrestrial digital broadcasting, broadcast content is usually composed of only files in one carousel. However, broadcast content using files included in a plurality of carousels can also be configured. For example, in the configuration of the broadcast content shown in FIG. 4, “40/0000 / startup.bml” may refer to “50/0001 / data.btb” across components.

  Therefore, similarly to the broadcast content, the predetermined DSRC content received by the DSRC reception / decoding unit 12 is expanded in the memory unit 13 so as to have a name space of, for example, “50/0001 / data.btb”, thereby enabling digital terrestrial broadcasting It is possible to handle the update process of a predetermined DSRC content exactly the same as the update process of the data broadcast content used in the above, and the same update process of both modules can be realized.

  Note that “merging the first content and the second content” described in the claims means that the broadcast content and the DSRC content are merged across the components as described above. Here, the word “merge” corresponds to a merge of software terms, and may be rephrased as fusion, merger, integration, or the like. Also, merging broadcast content and DSRC content across components is expressed as replacing or exchanging a predetermined module of the broadcast content and a predetermined module of the DSRC content when viewed on the basis of the broadcast content. You can also

  Next, the operation of receiving apparatus 10 according to the present embodiment will be described using FIG. FIG. 5 is a flowchart illustrating an example of display update of data broadcast content. Note that the receiving apparatus 10 has setting means for setting priority, and will be described by taking an example of displaying data broadcast content on the monitor based on the priority. This priority is set in, for example, broadcasting station equipment, and “priority for broadcast content” and “priority for DSRC content” are described in the description area corresponding to the value of the transmission format in the data encoding scheme descriptor of the PMT. , “Conforms to priority setting of receiver” and the like. In FIG. 5, “terrestrial digital broadcasting” is abbreviated as “terrestrial digital” or “terrestrial”, and “DSRC signal” is abbreviated as “DSRC”.

  First, the broadcast reception demodulation unit 11 and the DSRC reception decoding unit 12 receive a terrestrial digital broadcast wave and a DSRC signal (steps S11 and S12).

  Specifically, the terrestrial digital broadcast wave received by the broadcast receiving / demodulating unit 11 is separated into audio signal and video signal data and broadcast content data. Then, the broadcast reception demodulation unit 11 outputs the video signal and audio signal data to the decoding unit 14, and the broadcast content data is stored in the memory unit 13. The DSRC content received and decoded by the DSRC reception decoding unit 12 is stored in the memory unit 13 by the DSRC reception decoding unit 12.

  Here, the DSRC reception decoding unit 12 updates the DSRC content stored in the memory unit 13 every time the reception state changes. The change in the reception state is, for example, when a vehicle enters an area where a DSRC signal can be acquired, when a vehicle enters an area where a different DSRC signal can be acquired, or when a vehicle leaves the area where a DSRC signal can be acquired. To occur.

  The DSRC content received by the DSRC receiving / decoding unit 12 is temporarily stored in the memory unit 13. If the DSRC content already exists in the memory unit 13, the DSRC content is updated to the latest version. Furthermore, when the DSRC content cannot be received, the DSRC content stored in the memory unit 13 is deleted after a predetermined time has elapsed.

  When the broadcast content or DSRC content module is updated, the control unit 16 detects the module update (step S13). Next, the broadcast content or the module of the DSRC content is expanded in the memory unit 13 by the DSRC reception decoding unit 12 (step S14).

  Subsequently, the priority is determined by the control unit 16 (step S15). In step S15, when the priority is set to conform to the priority setting of the receiver, the control unit 16 performs receiver setting determination (step S16).

  If it is determined in step S15 that the priority of the broadcast content is higher than the priority of the DSRC content, the broadcast content and the DSRC content are merged with priority given to the terrestrial digital module (broadcast content) (step S15). S17). In step S16, the process of step S17 is also executed when the setting of the receiver is terrestrial digital priority (broadcast content priority).

  On the other hand, when it is determined in step S15 that the priority of the DSRC content is higher than the priority of the broadcast content, the control unit 16 determines whether the module of the DSRC content has been deleted in the memory unit 13. (Step S18). In step S16, step S18 is also executed when the setting of the receiver has DSRC content priority.

  If it is determined in step S18 that the DSRC content module has been deleted, for example, if a predetermined time has elapsed since the DSRC content could not be received, the process proceeds to step S17 described above. On the other hand, if it is not determined in step S18 that the DSRC content module has been deleted, for example, if the vehicle is traveling in a DSRC signal acquisition area, the DSRC module (DSRC content) is given priority for broadcast content. And DSRC content are merged (step S19).

  Then, the merged data broadcast content is decoded by the decoding unit 14, and the updated data broadcast content is displayed on the monitor by the display unit 15 (step S20).

  As described above, if the priority is set, for example, if the priority of the DSRC content is set higher than the broadcast content, if the DSRC signal is not obtainable, the broadcast transmitted to the entire broadcast area by the terrestrial digital broadcast Although the content is displayed, in the area where the DSRC signal can be acquired, the receiving apparatus 10 can automatically update the display content such as displaying the region-specific DSRC content.

  Also, in an emergency, the broadcast content can be forcibly displayed regardless of whether the DSRC signal can be acquired by increasing the priority of the broadcast content.

  Next, a display example of content by the receiving device 10 according to the present embodiment will be described with reference to FIG. FIG. 6 is an image diagram when the content received by the receiving apparatus 10 of the present embodiment is displayed on the monitor. Note that “TV” in the drawing indicates an area in which video of a television broadcast is displayed.

  As shown in FIG. 6, in terrestrial digital broadcasting, contents including video signals and audio signals of television broadcasting, and broadcast news content of nationwide news articles and Japan maps, for example, are transmitted. In addition, in the DSRC signal, a news article unique to the region, a map of the region, an advertisement, and the like are transmitted.

  The receiving device 10 normally receives a terrestrial digital broadcast wave, and displays a television broadcast and broadcast content such as news articles and a map of Japan nationwide on a monitor. When a vehicle equipped with the receiving device 10 moves and enters the DSRC signal acquisition area of Setagaya, for example, Setagaya News, local advertisements, maps of Setagaya Ward, etc., instead of the broadcast content displayed so far Automatically displayed on the monitor. When a vehicle has left the DSRC signal acquisition area in Setagaya and a certain amount of time has passed, news articles from all over Japan and broadcast contents of the Japanese map are displayed on the monitor again.

  Similarly, when the vehicle enters the Hachioji DSRC signal acquisition area, for example, Hachioji news, local notices, etc. are automatically displayed on the monitor in place of the broadcast content that has been displayed. When a vehicle leaves the Hachioji DSRC signal acquisition area and a certain time has passed, news articles from all over Japan and broadcast contents of the Japanese map are displayed on the monitor again.

  As described above, according to the receiving device 10 of the present embodiment, the DSRC content update process can be automatically performed by merging the broadcast content and the DSRC content. The content in the area corresponding to the reception position can be received without performing acquisition or processing that increases the load.

  In addition, the content distribution system of the present invention can automatically update the receiving apparatus 10 by merging the broadcast content and the DSRC content, and can perform the process of acquiring the reception position information and increasing the load. The content in the area corresponding to the reception position can be received by the reception device 10 without being performed by the reception device 10.

  In addition, the content production method of the present invention combines the broadcast content and the DSRC content, so that the receiving device 10 does not perform processing for acquiring reception position information or increasing the load, so that the local content corresponding to the reception position can be obtained. The content can be received by the receiving device 10.

  In addition, the content transmission method of the present invention combines the broadcast content and the DSRC content, so that the receiving device 10 does not perform processing for acquiring reception position information or increasing the load, so that the local area corresponding to the reception position can be obtained. The content can be received by the receiving device 10.

  In the above-described embodiment, the receiving device 10 has been described by taking as an example the configuration in which the broadcast content as the first content and the DSRC content as the second content are received. However, the present invention is not limited to this, and the same effect can be obtained as long as the content is transmitted to a wide area and a local area.

  Further, in the above-described embodiment, the example in which the DSRC content is converted to be mapped to the same name space as the broadcast content by the data carousel transmission method has been described, but the present invention is not limited to this, The same effect can be obtained if the other format is converted into one of the formats and the both are merged.

  In the above-described embodiment, the example in which the receiving device 10 is mounted on a vehicle has been described. However, the present invention is not limited to this, and the same effect can be obtained if the configuration is mounted on a moving body. Can be obtained.

  In the above-described embodiment, the example has been described in which the priority is set in the description area corresponding to the value of the transmission format of the PMT data encoding scheme descriptor. However, the present invention is limited to this. For example, information indicating a component shared when broadcasting content and DSRC content are merged may be set in the description area.

Block diagram of receiving apparatus of this embodiment The figure which shows the structural example of the DSRC system which transmits the DSRC signal which the receiver of this Embodiment receives The figure which shows the structural example of the DSRC system which transmits the DSRC signal which the receiver of this Embodiment receives The figure which shows an example of a structure of the broadcast content which the receiver of this Embodiment receives. Flowchart of each step of receiving apparatus of this embodiment Image diagram when content received by receiving apparatus of this embodiment is displayed on monitor

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Receiving apparatus 11 Broadcast receiving demodulation part (1st content receiving means)
12 DSRC reception decoding unit (second content receiving means)
13 Memory unit (content storage means)
14 Decoding unit 15 Display unit 16 Control unit (content merging means, content updating means)
20, 30 DSRC system 21, 31 Broadcasting station equipment 22, 32 Communication network 23a, 23b, 31a Data distribution equipment 24a, 24b, 33a, 33b Antenna

Claims (5)

First content receiving means for receiving first content transmitted toward the first area, and second content transmitted toward the second area included in the first area A second content receiving means for detecting the update of the first and the second content by detecting an interrupt event that occurs when the first or the second content is updated; A memory unit that stores the first and second contents, and a display unit that displays at least one of the first and second contents,
The first content includes data of a BML document transmitted by an elementary stream that is an entry component of a data carousel transmission method, and a predetermined specification in the elementary stream that can be referred to by the BML document across the components. A first content module of
The second content includes a specific second content module associated with the specific first content module by file information indicating content association,
The memory unit uses the same name space when storing the specific first content module or the specific second content module, and the specific first content module or the specific content module. Of the modules of the second content, the module that the controller has detected the update is stored,
The receiving device , wherein the display unit displays a module stored in the memory unit . At least one of the first content and the second content has predetermined priority information, and the display unit is one of the first and second content modules based on the priority information. The receiving apparatus according to claim 1, wherein the information is preferentially displayed. The first content is data broadcasting content of terrestrial digital broadcasting, and the second content is narrow-area communication content by narrow-area communication toward a local area. The receiving device according to claim 2. The receiving device according to any one of claims 1 to 3, a first content distribution facility for distributing the first content, and a second content distribution facility for distributing the second content A content distribution system characterized by comprising: The second content distribution facility includes a plurality of antennas for each of the plurality of regions that transmit data of the second content unique to each of the plurality of regions included in the second area, and the plurality of antennas. And at least one data distribution facility for distributing data of the second content via
The data distribution facility has position information for each of the plurality of regions, and distributes the second content unique to the region for each of the plurality of regions based on the position information. Item 5. The content distribution system according to Item 4.