JP4435001B2 - 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, in order to share content, the content is distributed in TS from the main key station to the subkey station, and from the subkey station to the local station, and some modules are received as necessary on the receiving station side. A data broadcast TS may be sent after replacement (for example, Patent Document 1).
JP 2004-187319 A.

  However, since the timing and bit rate managed by the main key station, the sub key station, and the local station are different from each other, when the content is replaced in the sub key station or the local station, the main key station, the sub key station, and the local station are transmitted from the sub key station or the local station. Some data in the data broadcasting TS may be lost.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a data broadcast TS transmission apparatus and a data broadcast TS transmission method capable of always performing carousel replacement at an intended timing and bit rate on the data broadcast TS receiving side. .

In order to achieve the above object, the present invention is configured as follows.
Receive data broadcasting TS (Transport Stream) including a carousel that combines multiple modules, restore the module, replace some or all of the modules according to the organization information, reconfigure the carousel and convert it to TS A data broadcasting TS transmission device to be transmitted, comprising: a control means for controlling execution / stop of module replacement based on the identification result of the identification means for identifying the contents of the module obtained at the time of reception and the organization information Is.

  According to this configuration, prior to execution of module replacement of the received data broadcast TS, the content of the module of the received data broadcast TS is identified, and the content of the identified module and the content of the update module specified by the organization information are In comparison, it is determined whether or not they match, that is, whether or not they are replacement targets. For this reason, it is possible to perform an appropriate module replacement process for each receiving side, and thereby easily and flexibly cope with the bit rate change without losing a part of the data in the data broadcast TS to be transmitted.

  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 a carousel is arranged in the subsequent data area, the identification means The contents of each of the plurality of modules are identified based on DII obtained at the time of receiving the broadcast TS, and when the control means updates the contents of the module from the identification result of the identification means, the contents of the module and the organization information are updated. Are compared, and if they match, module replacement is executed.

  According to this configuration, it is possible to identify the contents of the module to be updated using the DII added to the data broadcast TS. Therefore, an appropriate module replacement process can be performed with a simple procedure.

  The control means, after matching the module content of the data broadcast TS at the time of reception with the module content specified by the organization information, detects the DII update, and the replacement start time specified by the organization information. The module replacement is executed based on the replacement start time when the time when the update of DII is detected from the comparison result is different from the replacement start time.

  According to this configuration, even when the time when the update of DII in the received data broadcast TS is detected is earlier than the intended replacement start time on the receiving side, the data broadcast TS can be retransmitted with correction to the intended timing. it can.

  As described above in detail, according to the present invention, a data broadcast TS transmission device and a data broadcast TS transmission method are provided that can perform carousel replacement at the intended timing and bit rate at the reception side of the data broadcast TS. can do.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of a data broadcast TS transmitting apparatus according to the present invention. Here, a configuration in a case where two systems of data broadcast TS are received and processed is shown.

  In FIG. 1, first and second TS receivers 101 and 201 are, for example, a data broadcast TS distributed from another station such as a key station (hereinafter referred to as another station distributed TS), and a data broadcast distributed through its own network. A TS (hereinafter referred to as “local delivery TS”) is received, and a section of a designated program is extracted based on control information (eg, designated PID (packet identifier), timing signal, etc.). The sections obtained by the TS receivers 101 and 201 are respectively sent to the first and second module restoration units 102 and 202 to restore the data of the individual modules, and then the first and second carousel reconstruction units. 103 and 203.

  On the other hand, the first and second module priority calculation units 104 and 204 fetch sections from the first and second TS reception units 101 and 201, respectively, calculate the appearance frequency of each module, and calculate the module priority from the calculation result. Is calculated. The module priorities obtained by the first and second module priority calculation units 104 and 204 are sent to the first and second carousel reconfiguration units 103 and 203, respectively.

  The first and second carousel reconfiguration units 103 and 203 respectively take in replacement modules and replace them with some or all of the modules restored by the first and second module restoration units 102 and 202 to reconfigure carousels. After that, it is converted to TS and sent out. At this time, the priority of the TS transmission source is reflected based on the module priority. The TS in which the carousel is reconfigured by the first and second carousel reconfiguration units 103 and 203 is sent to the TS multiplexer 105.

  Further, the DII monitoring unit 106 takes in the received TS from the first and second TS receiving units 101 and 201, and monitors changes in transaction id, module version, etc. in DII (Download Info Indication) information included in the received TS, When the change is detected, the DII information and the DII detection time are output to the composition confirmation unit 107.

  The composition confirmation unit 107 confirms the consistency between the DII information and the composition information received from the host system (not shown), and the received DII information in the TS is the replacement target module or carousel designated by the composition information. If it matches the DII information, the DII detection time is output to the replacement time confirmation unit 108.

  The replacement time confirmation unit 108 compares the DII detection time with the replacement start time in the composition information. If the DII detection time is not in the invalid time zone, as shown in FIG. An instruction to start replacement processing is transmitted to the configuration units 103 and 203. On the contrary, when the DII detection time is in the invalid time zone, the DII detection time is ignored, and the first and second carousel reconstruction units 103 and 203 start the replacement process at the replacement start time in the composition information. Send instructions.

  When the carousel replacement process is not necessary for the received TS, the timing is adjusted by the through processing unit 109 and the TS is sent to the TS multiplexing unit 105 as it is. In addition, the carousel generation unit 110 converts the carousel newly created by the own station into a TS and sends it to the TS multiplexing unit 105.

  The TS multiplexing unit 105 multiplexes the TSs transmitted from the first and second carousel reconfiguration units 103 and 203, the through processing unit 109, and the carousel generation unit 110 to generate a data broadcast transmission TS. The generated TS is sent to a predetermined local station or service area.

The operation of the above configuration will be described below.
The first and second TS receivers 101 and 201 receive the input distribution TS of the local station / other stations, and perform management for each PID to extract sections constituting a data broadcast carousel. The extracted sections are sent to the first and second module restoration units 102 and 202, and the data of the modules are sequentially restored and sent to the first and second carousel reconstruction units 103 and 203.

  On the other hand, the first and second module priority calculation units 104 and 204 calculate the appearance frequency of each module from the section of the received TS, and calculate the module priority from the calculation result. Specifically, the number of consecutive appearances of the section to be sent is counted in module units until all modules described in DII of TS are ready.

  The module priority calculation method will be described with reference to FIG. Now, as shown in FIG. 3A, the number of sections of content composed of three modules (module IDs 1 to 3) is 7, 1 and 2, respectively, and one carousel is in the order shown in FIG. Assume that they are arranged. The ID of all modules is described in the DII of the TS.

  Therefore, the module priority calculation units 104 and 204 count the number of sections for each module ID obtained from DII, obtain the number of consecutive times when all the modules are prepared, and calculate the module priority from the ratio. To do. In the example of FIG. 3, since module ID 0 appears twice, module ID 1 appears once, and module ID 2 appears once, module priority in this case is 2: 1: 1. The calculated module priority of each reception system is sent to the corresponding first and second carousel reconfiguration units 103 and 203.

In the first and second carousel reconfiguration units 103 and 203, the restored modules are replaced as necessary, and the arrangement order is changed based on the calculated module priorities to reconfigure carousels.
On the other hand, the DII monitoring unit 106, the composition confirmation unit 107, and the replacement time confirmation unit 108 execute the processing procedure shown in FIG. Here, an example at the time of receiving a data broadcast TS distributed from another station will be described as a representative.

  The DII monitoring unit 106 takes in the data broadcast TS, and monitors the change of the DII information, that is, the version upgrade of the module contents (step ST4a). Consistency with the composition information received from step S4 is confirmed (step ST4b), and it is determined whether or not the content of the module matches the content of the module specified by the composition information to be replaced (step ST4c).

  Here, when they match (Yes), the replacement time confirmation unit 108 compares the DII detection time with the replacement start time in the composition information (step ST4d), and from this comparison result, the DII detection time is determined from the replacement start time. It is determined whether or not it is within the invalid time zone (step ST4e).

Here, if the invalid time zone is entered (Yes), the replacement time confirmation unit 108 starts replacement processing for the first carousel reconfiguration unit 103 so as to perform module replacement at the replacement start time specified by the composition information. Is transmitted (step ST4f), and if it is not an invalid time zone (No), an instruction to start replacement processing is immediately transmitted to the first carousel reconfiguration unit 103 (step ST4g).
In step ST4c, if it does not match (No), the process is terminated as it is. In addition, the processing from step ST4a to step ST4g is also performed for the data broadcast TS of the own station.

  As described above, in the above embodiment, prior to execution of module replacement of the received data broadcast TS, the contents of the module of the data broadcast TS received by the DII monitoring unit 106 are identified, and this identification is performed by the composition confirmation unit 107. The contents of the module and the contents of the update module specified by the organization information are compared to determine whether or not they match, that is, whether or not they are to be replaced. If they match, the time when the replacement time confirmation unit 108 detects the update of the DII is compared with the replacement start time specified by the composition information, and the time when the update of the DII is detected and the replacement start time If there is a deviation, the first and second carousel reconstruction units 103 and 203 are caused to perform module replacement based on the replacement start time.

  Therefore, appropriate module replacement processing can be performed for each subkey station or local station as a receiving station, thereby easily and flexibly changing the bit rate without losing some data in the data broadcast TS to be transmitted. It becomes possible to respond.

  Further, even when the time at which the update of DII in the received data broadcast TS is detected is earlier than the replacement start time intended on the receiving station side, the data broadcast TS can be retransmitted after being corrected to the intended timing.

  In the above embodiment, the devices can be divided or integrated according to function. When implemented with one unit, it is also possible to perform TS reception / carousel replacement / multiplexing. In this case, with the introduction of one device, it is possible to respond to a net program by TS reception at the time of TS transmission, replace part or all of the net program, and send out the local data broadcast, thereby reducing the number of devices. This can save space and reduce costs. Further, since the other station distribution TS and the local station distribution TS are multiplexed and transmitted as one TS, rate management and restriction at the total bit rate can be easily performed. As a result, it is possible to prevent the bit rate from failing and to effectively use a given band.

  In addition, this invention is not limited to the said embodiment, A various change is possible. For example, in the above embodiment, two TS reception systems are used, but the present invention can be similarly implemented even if the number of systems is further increased. Further, it is not always necessary to mix the own station / other stations, and the reception input is not limited.

1 is a block diagram showing an embodiment of a data broadcasting TS transmission device according to the present invention. The timing diagram shown in order to demonstrate the example which provided the invalid time slot which disregards DII change in the embodiment. The figure which shows the example for demonstrating the module priority calculation method implemented in the said embodiment. The flowchart which shows the control processing procedure of the data broadcasting TS transmission apparatus in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 ... 1st TS receiving part, 201 ... 2nd TS receiving part, 102 ... 1st module restoration part, 202 ... 2nd module restoration part, 103 ... 1st carousel reconstruction part, 203 ... 2nd carousel reconstruction part, 104 ... First module priority calculation unit, 204 ... second module priority calculation unit, 105 ... TS multiplexing unit, 106 ... DII monitoring unit, 107 ... composition confirmation unit, 108 ... replacement time confirmation unit, 109 ... through processing unit, 110: Carousel generator.

Claims (2)

Receiving data broadcast TS (Transport Stream) including a carousel timing the local station that is the bit rate and management by combining a plurality of modules are transmitted different main key station or subkeys station or we restore the module, Data broadcasting TS transmission of the own station that designates a module to be changed and replaces some or all of the modules according to the organization information including the module replacement start time, reconfigures the carousel, converts it into a TS, and transmits it 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 a header area, and the carousel is arranged in a subsequent data area. When taking
Identification means for identifying each of the plurality of modules based on DII obtained when receiving the data broadcast TS;
The module identified by the identification means is compared with the module specified by the composition information, and if they match, the DII detection time is compared with the replacement start time specified by the composition information, and the replacement start It is determined whether or not the DII detection time is within the invalid time zone by setting the invalid time zone to a predetermined time before the time, and if it is within the invalid time zone, it is designated by the organization information Control means for executing the module replacement when it is determined that the module replacement is executed based on the replacement start time, and the module replacement is not within the invalid time zone when the module replacement is not performed. A data broadcasting TS transmission device characterized by that. Receiving data broadcast TS (Transport Stream) including a carousel timing the local station that is the bit rate and management by combining a plurality of modules are transmitted different main key station or subkeys station or we restore the module, Data broadcasting TS transmission of the own station that designates a module to be changed and replaces some or all of the modules according to the organization information including the module replacement start time, reconfigures the carousel, converts it into a TS, and transmits it 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 a header area, and the carousel is arranged in a subsequent data area. When taking
Identifying each of the plurality of modules based on DII obtained upon reception of the data broadcast TS;
The identified module is compared with the module specified by the composition information, and if they match, the DII detection time is compared with the replacement start time specified by the composition information, and a predetermined time from the replacement start time is compared. It is determined whether or not the DII detection time is within the invalid time zone with the previous time as the invalid time zone, and if it is within the invalid time zone, the replacement start time specified by the organization information The module replacement is executed based on the data, and when it is not within the invalid time zone, the module replacement is executed when it is determined that it is not within the invalid time zone. Broadcast TS transmission method.

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