JP4421493B2 - Data broadcast TS transmission apparatus and data broadcast TS transmission method - Google Patents

Description

  The present invention relates to a data broadcast TS transmission apparatus and a data broadcast TS transmission method for reconfiguring and transmitting a data broadcast TS (hereinafter referred to as a data broadcast TS) provided as an additional service of digital television broadcast, for example. .

  In recent years, terrestrial digital broadcasting has been started, and data broadcasting services are provided in this terrestrial digital broadcasting.

  In general, in data broadcasting, a plurality of components (ES: Elementary stream) constituting a program are divided into data called sections and repeatedly transmitted in units of carousels. A carousel is a collection of section data. The receiving apparatus receives this carousel and completes the display of the program contents when all the components constituting the program are received.

  A component is composed of a plurality of modules, and is divided into section data and sent out at the time of sending. Taking the weather forecast screen as an example, the BML (Broadcast Markup Language) document that composes the screen frame, the image file that shows the map of Japan, the image file that shows the weather mark, and the text file that shows the temperature, etc. are the modules that make up the component. At the time of transmission, it is further divided into section data.

  In terrestrial digital broadcasting, content is distributed from the main key station to the subkey station and from the subkey station to the local station so that the contents are shared with each other, and the data broadcast TS is generated and transmitted by each station. .

  By the way, in the terrestrial digital broadcasting, there is a strong demand for a method for displaying the updated content (module) as fast as possible on the receiver side when the content is updated in the subkey station or the local station.

Therefore, conventionally, a method has been proposed in which a data broadcast TS with an update module at the head is generated and transmitted to the receiver side (for example, Patent Document 1).
JP2003-18112A.

  However, in the above method, each time the module is updated, each station to which the data broadcast TS is distributed needs to generate the data broadcast TS including the update module from scratch, which is very expensive in terms of facility expansion. .

  Therefore, an object of the present invention is to send an update module to a receiver for immediate display every time a module of a data broadcasting TS is updated without requiring a large capital investment between stations or within a station. An object of the present invention is to provide a data broadcast TS transmission device and a data broadcast TS transmission method that can be used.

In order to achieve the above object, the present invention is configured as follows.
Receiving / restoring means for receiving a data broadcast TS (Transport Stream) including a carousel in which a plurality of modules each having a block structure are combined and restoring the module, and a plurality of blocks restored by the receiving / restoring means as a recording medium Recording means for recording, conversion sending means for reconstructing a plurality of blocks read from the recording medium into a carousel, converting them into TS, and sending out a module by managing a plurality of blocks on the recording medium by module In response to this, the corresponding block on the recording medium is replaced with the update block, and the plurality of blocks corresponding to the update module are transferred to the conversion / transmission means and transmitted together, and then the plurality of blocks are read from the recording medium and transmitted. Control means to be provided.

  According to this configuration, the received data broadcast TS is restored to a plurality of blocks and then recorded on the recording medium, and the plurality of blocks are managed by module on the recording medium. In this case, a plurality of blocks on the recording medium corresponding to the module to be updated can be specified, whereby the plurality of blocks on the recording medium can be replaced with a plurality of blocks corresponding to the updating module. For this reason, it is possible to reduce the equipment cost of the system without generating the data broadcast TS including the update module from scratch.

  Also, when a module is updated, a plurality of blocks corresponding to the update module are transmitted in a lump, and then a plurality of blocks on the updated recording medium are reconfigured into a carousel, converted into a TS, and transmitted. . Therefore, every time the module of the data broadcasting TS is updated, the updated module can be immediately received and displayed on the receiver side.

When the data broadcasting TS has a transmission structure in which a DII (Download Info Indication) for identifying a module included in the TS is arranged in the header area and a carousel is arranged in the subsequent data area, the control means A plurality of blocks on the recording medium are managed based on DII obtained at the time of receiving the broadcast TS, and the update module is sent after the DII for identifying the updated module is sent to the conversion sending means in response to the replacement request. A plurality of blocks corresponding to the above are transferred and transmitted collectively.
According to this configuration, using the DII added to the data broadcast TS, a plurality of received / restored blocks can be recorded on the recording medium and automatically managed for each module.

When the update file is input, the update file conversion means for converting the update file into a carousel module and sending the module to the control means is further provided.
According to this configuration, it is not necessary to input the update file in a predetermined data format, and any data format can be used within a convertible range. Therefore, even if an update file having any data format is input, the update file can be transmitted to the receiver as a data broadcasting TS update module.

  As described above in detail, according to the present invention, each time a module of the data broadcasting TS is updated, the update module is sent to the receiver without requiring a large capital investment between stations or within the station. A data broadcast TS transmission apparatus and a data broadcast TS transmission method that can be displayed immediately can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of a local station to which a data broadcast TS transmission device according to the present invention is applied.

  In FIG. 1, the TS converter 10 receives, for example, a data broadcast TS transmitted from the data broadcast transmission device 20 of the key station, restores a plurality of modules, replaces the update module transmitted from the module update device 31, and again. Convert to data broadcasting TS. This data broadcast TS is sent to a predetermined local station or service area.

  The module update device 31 performs format conversion to the data format of the data broadcast TS when the update file sent from the automatic update system 32 is not in the data format of the data broadcast TS during the module update process. In this format conversion, an update file is divided into sections and converted into update modules.

FIG. 2 is a block diagram showing a configuration of the TS converter 10.
In FIG. 2, a TS input unit 11 takes in a data broadcast TS, performs a carousel analysis process and a DII content analysis process included in the TS, and transfers each section data of the carousel to an appropriate area of the memory 12, After the transfer is completed, the switching control unit 13 is notified of the existence area and DII of each section data on the memory 12.

  The switching control unit 13 manages the section data on the memory 12 for each module based on the DII notified from the TS input unit 11 and the existence area information of each section data, and the module updating device 31 via the replacement module receiving unit 14. Is received, and the corresponding section data on the memory 12 is replaced with the section data of the update module. Further, the updated DII and the section data of the update module are transferred to the multiplexing unit 15, and then the transfer start address and the number of transfer bytes of the memory 12 are designated to the multiplexing unit 15. The updated DII includes the module ID of each section data, update information, and information indicating the outline of the program.

  The multiplexing unit 15 generates a plurality of section data corresponding to the update module transferred from the switching control unit 13 in the advance carousel, and stores the memory 12 by the number of bytes specified from the address specified by the switching control unit 13. Each section data is read and the carousel is reconfigured. Then, the advance carousel is converted to TS together with the notified DII and transmitted at once, and the subsequent carousel is converted to TS and transmitted.

Next, the operation in the above configuration will be described.
The data broadcast TS transmitted from the data broadcast transmission device 20 of the key station is received by the TS input unit 11, and section data constituting the carousel of the data broadcast is extracted. These section data are transferred to an appropriate area of the memory 12. When the transfer of the section data is completed, the TS input unit 11 notifies the switching control unit 13 of the section data existing area on the memory 12 and also notifies the DII included in the data broadcast TS.

  Then, the switching control unit 13 manages the section data on the memory 12 for each module based on DII. Here, in one carousel, as shown in FIG. 3, the number of sections (number of blocks) of the content composed of three modules A to C (module IDs 1 to 3) is 6, 2, and 3, respectively. Then, it is assumed that one carousel output from the multiplexing unit 15 is arranged in the order shown in FIG. Note that the IDs of all modules A to C are described in the DII of the TS.

  Previously, even if the module C on the memory 12 was updated, for example, as shown in FIG. 4, since the module that has not been updated is preferentially transferred, the transfer of the updated module C was slow.

  Therefore, in the present embodiment, for example, when the module C on the memory 12 is updated, the updated carousel is transmitted after the updated module C is collectively transmitted as shown in FIG. . Then, since all the sections of the module C are first received by the receiver, the updated module C is immediately reproduced and displayed.

  Further, when the replacement module reception unit 14 receives the update module, the switching control unit 13 executes the control process illustrated in FIG.

  First, the switching control unit 13 updates the section data of the corresponding module on the memory 12, updates the module version in the DII, transfers the updated DII and the section data of the update module to the multiplexing unit 15, and The transfer start address of the memory 12 and the number of transfer bytes are designated to the multiplexing unit 15 (step ST6a).

  The multiplexing unit 15 generates section data of the update module in the advance carousel (step ST6b). Then, each section data in the memory 12 is read from the address designated by the switching control unit 13 for the designated number of bytes, and the carousel following the advance carousel is reconfigured (step ST6c).

  Subsequently, the multiplexing unit 15 first sends an update DII (step ST6d), then converts the advance carousel to TS and sends it (step ST6e), and determines whether or not the advance carousel has been sent. Is performed (step ST6f). Here, if not completed (No), the multiplexing unit 15 proceeds to the process of step ST6e. If completed (Yes), the updated carousel following the advance carousel is converted to TS and repeated. Transmit (step ST6g).

  As described above, in the above embodiment, a plurality of section data constituting the module is extracted from the data broadcast TS received by the TS input unit 11 and recorded in the memory 12. The section data is managed by module.

  Therefore, when the replacement module receiving unit 14 receives the update module, the plurality of section data on the memory 12 corresponding to the module to be updated can be specified, and thereby the plurality of section data on the memory 12 can be specified as the update module. It can be replaced with a plurality of corresponding section data. For this reason, it is possible to reduce the equipment cost of the system without generating the data broadcast TS including the update module from scratch.

  Also, when a module is updated, a plurality of section data corresponding to the update module is generated by the multiplexing unit 15 into advance carousel data, converted to TS, and transmitted in a batch, and thereafter a plurality of sections on the memory 12 Data is reconstructed into a carousel, converted to TS, and transmitted. Therefore, every time the module of the data broadcasting TS is updated, the receiver can immediately receive the updated module and display it.

  In the above embodiment, the data format of the update file input by the module update device 31 is converted to the data format of the TS update module that can be replaced by the TS converter 10 and sent to the TS converter 10. Therefore, even if an update file of any data format is input, it can be unified to the TS data format.

  Further, in the above embodiment, since TS reception / module replacement / multiplexing can be performed by one TS converter 10, the number of apparatuses can be reduced in the local station, and space saving and cost reduction can be realized. .

  The present invention is not limited to the above embodiment, and the system configuration, TS converter configuration, data broadcasting TS transmission method, types of data broadcasting TS to be handled, and the like are within the scope of the present invention. Various modifications can be made.

The schematic block diagram which shows one Embodiment of the local station to which the data broadcasting TS transmission device which concerns on this invention is applied. FIG. 2 is a block diagram showing a specific configuration of the TS converter shown in FIG. 1. The figure which shows the module structure of the data broadcasting TS handled by the embodiment. The figure shown in order to demonstrate the transmission method of the conventional data broadcast TS. The figure shown in order to demonstrate the transmission method of data broadcasting TS in the embodiment. The flowchart shown in order to demonstrate the control processing procedure of TS converter in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... TS converter, 11 ... TS input part, 12 ... Memory, 13 ... Switching control part, 14 ... Replacement module receiving part, 15 ... Multiplexing part, 20 ... Data broadcasting transmission apparatus, 31 ... Module update apparatus, 32 ... Automatic update system.

Claims (4)

Receiving / restoring means for receiving a data broadcast TS (Transport Stream) including a carousel in which a plurality of modules each having a block structure are combined, restoring the module, and recording the plurality of blocks of the restored module on a recording medium;
A plurality of blocks on the recording medium are managed for each module, the corresponding block on the recording medium is replaced with an update block according to the module requested to be replaced, and a plurality of blocks corresponding to the update module are output. A switching control unit for outputting information specifying a transfer start address and the number of transfer bytes of the recording medium;
A plurality of blocks corresponding to the update module output from the switching control unit are generated in the advance carousel, and a plurality of blocks having the specified number of bytes are read from the recording medium from the address specified by the switching control unit. A data broadcast TS transmission device comprising: a multiplexing unit configured to reconfigure the carousel, convert the advance carousel into a TS and transmit it in a batch, and convert the subsequent carousel into a TS for transmission . When the data broadcasting TS has a transmission structure in which DII (Download Info Indication) for identifying a module included in the TS is arranged in the header area and the carousel is arranged in the subsequent data area,
The switching control unit manages the plurality of blocks on the recording medium based on DII obtained when the data broadcasting TS is received, and identifies an updated module for the multiplexing unit in response to a replacement request 2. The data broadcast TS transmission device according to claim 1, wherein a plurality of blocks corresponding to the update module are transferred to the multiplexing unit after the DII is transmitted. 2. The data broadcast TS transmission device according to claim 1, further comprising update file conversion means for converting the update file into the carousel module when the update file is inputted and transmitting the module to the switching control unit. Receiving / restoring means for receiving a data broadcast TS (Transport Stream) including a carousel in which a plurality of modules each having a block structure are combined, restoring the module, and recording the plurality of blocks of the restored module on a recording medium ; A switching control unit that manages a plurality of blocks on the recording medium for each module; and a multiplexing unit that reconfigures the plurality of blocks recorded on the recording medium into the carousel, converts the carousel into a TS, and transmits the TS. In the data broadcast TS transmission method used in the data broadcast TS transmission device provided,
In the switching control unit, the corresponding block on the recording medium is replaced with an update block according to the module requested to be replaced, and a plurality of blocks corresponding to the update module are output to the multiplexing unit, and then the recording Information specifying the transfer start address of the medium and the number of transfer bytes is output to the multiplexing unit,
In the multiplexing unit, a plurality of blocks corresponding to the update module output from the switching control unit are generated in the advance carousel, and a plurality of blocks having the number of bytes specified from the address specified by the switching control unit are generated. A data broadcasting TS transmission method , comprising: reading from the recording medium, reconfiguring the carousel, converting the advance carousel into a TS and transmitting the batch, and then converting the subsequent carousel into a TS for transmission.

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