JP4509908B2 - Receiving station data broadcast sending system and receiving station data broadcast sending method - Google Patents

Description

  The present invention relates to a reception data broadcast transmission system and a reception data broadcast transmission method for receiving a transport stream from a transmission data broadcast transmission system and transmitting a transport stream packet constituting a module.

  One of the features of digital broadcasting services is data broadcasting. In data broadcasting, independent information such as information on a program, weather forecast, and news can be provided in conjunction with video and audio. In data broadcasting, interactive service is also possible.

  In general, in data broadcasting, for example, as described in Patent Document 1, a plurality of components (basic stream, 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 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., become the modules that make up the component. It is divided into.

Data broadcasting services have already been implemented in BS digital broadcasting and CS digital broadcasting. The BS digital broadcast and the CS digital broadcast are satellite broadcasts, and data is transmitted to the receiving stations all at once. Therefore, like current analog broadcasting, a local station receives data broadcast by a key station to which the local station belongs, and broadcasts data that is independently reorganized with respect to the received broadcast data. Broadcast data is not linked between stations. On the other hand, in terrestrial digital broadcasting, video and audio are linked between affiliated stations, and in data broadcasting, the affiliated stations must be linked.
JP 2001-359001 A

  However, when linking between affiliated stations in data broadcasting, the receiving station sends data after receiving data from the originating station, so a time lag occurs between the originating station and the receiving station. In order to minimize the influence of this time lag, the problem can be solved by transmitting TS (Transport Stream) packets received from the originating station as they are. However, even in this case, if the originating rate at which the originating station sends TS packets is different from the receiving rate at which the receiving station sends TS packets, the receiving station must send TS packets at the originating rate. Bad effects will occur. Further, since the transmission of the receiving station depends on the originating rate, there is a problem that the receiving rate of the receiving station cannot be observed if the receiving rate is higher than the originating rate.

  In consideration of these, in data broadcasting, a technique for minimizing the time lag between the originating station and the receiving station and performing transmission at the receiving rate without depending on the originating rate is required.

  Therefore, an object of the present invention is to provide a receiving data broadcast sending system and a receiving data broadcast sending method for minimizing the time lag between the sending station and the receiving station and performing sending at the receiving rate without depending on the starting rate. Is to provide.

  In order to solve the above-described problem, a first feature of the present invention relates to a receiving station data broadcast transmission system which receives a transport stream from an originating station data broadcast transmission system and transmits transport stream packets constituting a module. That is, the receiving data broadcast transmission system according to the first feature of the present invention receives the transport stream packet from the originating data broadcast transmission system, generates section data from the received transport stream, and generates a packet ID assigning unit. And a sectioning unit for inputting to the carouseling unit; a sectioning unit for storing the section data input from the sectioning unit; and a carouseling unit for inputting the carousel data to the packet ID assigning unit when the module is restored and the carousel data is generated; The packet ID adding unit that adds the packet ID to the section data input from the sectioning unit and the carousel data input from the carouseling unit and inputs the packet ID to the multiplexing unit, and the data input from the packet ID adding unit Multiplexer for multiplexing and sending out, When the carousel data is generated by the cell converting unit, the packet ID assigning unit stops the input of the section data input from the sectioning unit to the multiplexing unit, and multiplexes the carousel data input from the carousel converting unit. Input to the conversion section.

  According to the present invention, section data is generated from the originating transport stream packet and sent out one section at a time from when the carousel data is updated until it is reconstructed. Therefore, since the data is transmitted until the carousel data is generated, the time lag between the originating station and the receiving station can be minimized.

  Here, the multiplexing unit preferably transmits the data input from the packet ID assigning unit at the transmission rate of the receiving station. Here, when section data is being transmitted, the transmission rate of the receiving station depends on the transmission rate of the originating station, but after the carousel data is generated, the accumulated carousel data is transmitted, so any Data can be sent at a rate of

  Here, when a transport stream is received from the originating data broadcast transmission system, a transport stream separating unit that reads out the progress table data and extracts the transport stream that matches the basic stream packet ID of the program to be broadcast at the receiving station. Further, it is preferable that the sectioning unit generates section data from the transport stream separated by the transport stream separation unit and inputs it to the packet ID assigning unit and the carouseling unit. As a result, the content unique to the receiving station can be replaced with the transport stream received from the originating station.

  The second feature of the present invention relates to a receiving station data broadcast sending method for receiving a transport stream from a sending station data broadcast sending system and sending out transport stream packets constituting a module. That is, in the receiving data broadcast transmission method according to the second aspect of the present invention, when the transport stream packet is received from the originating data broadcast transmission system by the sectioning unit, section data is generated from the received transport stream. The step of inputting to the packet ID assigning unit and the carousel converting unit, and the section data input from the sectioning unit are accumulated by the carousel generating unit, the packet ID is assigned when the module is restored and the carousel data is generated. The packet ID is added to the section data input from the sectioning unit and the carousel data input from the carouseling unit, and the packet ID is added to the multiplexing unit. And the multiplexing unit When the data input from the packet ID assigning unit is multiplexed and transmitted, and when the carousel data is generated by the carousel generating unit, the packet ID assigning unit outputs the section data input from the sectioning unit. The input to the multiplexing unit is stopped, and the carousel data input from the carousel converting unit is input to the multiplexing unit.

  Here, it is preferable that the data input from the packet ID assigning unit is transmitted by the multiplexing unit at the transmission rate of the receiving station.

  Further, when the transport stream is received from the originating data broadcast transmission system by the transport stream separating unit, the progress table data is read out and the transport stream matches the basic stream packet ID of the program broadcast at the receiving station. A step of extracting a stream; and a step of generating section data from the transport stream separated by the transport stream separating unit by the sectioning unit and inputting the section data to the packet ID adding unit and the carouseling unit. It is preferable.

  According to the present invention, there is provided a reception data broadcast transmission system and a reception data broadcast transmission method for minimizing a time lag between a transmission station and a reception station and performing transmission at a reception rate without depending on the transmission rate. can do.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

(Best Embodiment)
As shown in FIG. 1, the data broadcasting system according to the best embodiment of the present invention includes a receiving station system 100 and a starting station system 200. The originating system 200 is a system in which key stations located in, for example, Tokyo and Osaka send data broadcasts. The receiving system 100 is a local station that belongs to the key station and receives broadcast data from the key stations to each home. This is a distribution system. The receiving system 100 and the originating system 200 are connected by a transport stream (TS) dedicated line.

  The station system 200 includes a station data broadcast transmission system 210 and a multiplexer (MUX) 220. The originating data broadcast transmission system 210 transmits the data broadcasting data generated at the originating station to the receiving system 100 via the TS dedicated line and inputs it to the multiplexer 220. The multiplexer 220 multiplexes data broadcasting data output from the originating data broadcast transmission system 210 and distributes the data to each home.

  The receiving station system 100 includes a receiving station data broadcast transmission system 110 and a multiplexer 120. The receiving station data broadcast transmission system 110 receives a transport stream from the originating data broadcast transmission system 210 and transmits transport stream packets constituting the module. Specifically, the receiving station data broadcast transmission system 110 receives data transmitted from the originating system 200 through the TS dedicated line and inputs the data to the multiplexer 120. The multiplexer 120 multiplexes the video and audio transport stream and the data broadcast transport stream output from the receiving station data broadcast transmission system 110 and distributes them to each home.

  Next, the receiving data broadcast transmission system 110 according to the preferred embodiment of the present invention will be described with reference to FIG.

  The received data broadcast transmission system 110 includes a controller 111, a data broadcast transmission device 112, and a transport stream converter (TS converter) 113.

  The controller 111 is a device that manages the progress table data, replacement information data, control mode data, and replacement content data of the receiving station. The progress table data of the receiving station is acquired from the data server 140. Of the data transmitted from the originating station, the content data to be replaced at the receiving station is acquired from the content management server 130. The controller 111 inputs the progress table data and the content data to the data broadcast transmission device 112 and the transport stream converter 113.

  The data broadcasting transmission device 112 receives carousel data composed of DSM-CC sections, PES (Packetized Elementary Stream) and PCR (Proguram Clock Reference: transport) from the input progress table data and content data. Time information to be added to the stream) is generated and input to the multiplexer 120. Further, the data broadcast transmission device 112 inputs the local station transport stream generated at the receiving station to the transport stream converter 113.

  The transport stream converter 113 is a device that replaces the data broadcast transport stream received from the originating data broadcast transmission system 210 and the received station transport stream input from the data broadcast transmission device 112 of the received data broadcast transmission system 110. is there. Based on the progress table data input from the controller 111, the transport stream converter 113 selects a transport stream to be transmitted from the originating transport stream and the receiving transport stream, and the selected transport stream is The bit rate specified by the receiving station is set and input to the multiplexer 120.

  Next, the transport stream converter 113 according to the preferred embodiment of the present invention will be described in detail with reference to FIG.

  The transport stream converter 113 shown in FIG. 3 includes progress table data 151, a transport stream separation unit 152, a sectioning unit 153, a carouseling unit 154, a PID adding unit 155, and a multiplexing unit 156.

  The progress table data 151 is data input from the controller 111.

  The transport stream separating unit 152 filters the originating transport stream based on the ES_PID (basic stream packet ID) of the receiving station included in the progress table data 151. The transport stream input here is composed of transport stream packets including items of PID, header, and data as shown in FIG. The data filtered by the transport stream separation unit 152 is input to the sectioning unit 153.

  The sectioning unit 153 generates section data from the received transport stream and inputs it to the packet ID assigning unit and the carouseling unit. The section data generated here includes items of table ID, header, data, and CRC, as shown in FIG. The section data is generated from a plurality of transport stream packets shown in FIG.

  The carousel converting unit 154 accumulates the section data input from the sectioning unit 153, and inputs the carousel data to the packet ID assigning unit 155 when the module is restored and the carousel data is generated.

  The PID assigning unit 155 adds the packet ID to the section data input from the sectioning unit 153 and the carousel data input from the carouseling unit, and inputs the packet ID to the multiplexing unit 156.

  The multiplexing unit 156 multiplexes the data input from the packet ID assigning unit 155 and outputs the multiplexed data at the transmission rate included in the progress table data 151 to the multiplexer 120.

  As described above, in the preferred embodiment of the present invention, when the originating transport stream is input, the sectioning unit inputs the section data to the PID adding unit 155 and the section data to the carouseling unit 154. Enter. The transport stream converter 113 sends out the section data generated by the sectioning unit 153 one section at a time until all section data is received and the carousel is restored.

  Here, when all the section data is received by the carousel converting unit 154 and the carousel data is restored, as shown in FIG. 6, the packet ID assigning unit 155 includes a multiplexing unit for the section data input from the sectioning unit. The carousel data input from the carousel converting unit is input to the multiplexing unit 156. As described above, in the preferred embodiment of the present invention, the section data is transmitted until the carousel data is generated, and the carousel data is transmitted after the carousel data is generated.

  Next, transition of data transmitted in the receiving data broadcast transmission system 110 after a new carousel is transmitted from the originating system 200 will be described with reference to FIG.

  When new carousel data is transmitted from the originating station system 200, the transport stream converter 113 filters the data required at the receiving station by the transport stream separating unit 152, and the transport unit received by the sectioning unit 153 Section data is generated from the stream packet. The time A in FIG. 7 indicates the time from the time “carousel update” at which the transport stream packet constituting the new carousel is received to the time “section transmission start” at which section data can be generated and transmitted. During this time A, section data is generated from the packet received from the originating station and transmitted, so that it is transmitted at the originating rate.

  Thereafter, the transport stream converter 113 receives the transport stream packet and reconfigures the carousel while sectioning. At time “carousel transmission switching”, when all the transport stream packets necessary for carousel reconfiguration are received and carousel data is generated, the generated carousel data is transmitted. At this time, since the generated carousel data is stored in the storage area of the transport stream converter 113, the data can be transmitted at an arbitrary receiving rate designated by the receiving station regardless of the originating rate.

  Next, with reference to FIG. 8, a receiving data broadcast transmission method according to the preferred embodiment of the present invention will be described.

  First, when a originating transport stream packet is received from the originating data broadcast transmission system 210 in step S101, it is determined in step S102 whether or not carousel data has been updated. If there is no carousel update, the process ends.

  If carousel data is updated, transmission of carousel data is stopped in step S103. For example, the input of section data from the sectioning unit 153 to the carouseling unit 154 is stopped, or the sending of the carousel data by the multiplexing unit 156 is stopped. Further, in step S104, the received originating transport stream packet is accumulated, section data is generated by the sectioning unit 153, and in step S105, the section data generated in step S104 is transmitted. On the other hand, in step S104, the carousel unit 154 restores the carousel data module from the section data generated by the sectioning unit 153.

  If it is determined in step S107 that the restoration of all the modules of the carousel data has not been completed, the processing is terminated and a new originating transport stream packet is received. On the other hand, when all the modules have been restored, in step S108, the carousel data module generated by the carousel converting unit 154 is transmitted via the PID adding unit 155 and the multiplexing unit 156. At this time, transmission of one section of the section data transmitted in step S105 is stopped.

  As described above, according to the preferred embodiment of the present invention, when section data is transmitted, the transmission rate of the receiving station can be arbitrarily set. Since the received section data is restored and sent out, the data restoration depends on the sending rate of the originating station, but can be controlled so as not to exceed the sending rate set in the receiving station progress table. Even after the carousel data is generated, the data can be transmitted at an arbitrary rate. Also, from the time the carousel data is updated until it is reconstructed, section data is generated from the originating transport stream packet and sent out one section at a time. Therefore, since the data is transmitted until the carousel data is generated, the time lag between the originating station and the receiving station can be minimized.

(Other embodiments)
As described above, the present invention has been described according to the best mode for carrying out the invention. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the receiving data broadcast transmission system described in the best mode of the present invention may be configured on a single piece of hardware as shown in FIG. It may be configured on hardware. Further, it may be realized in an existing content management server, data server, or the like.

  It goes without saying that the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

1 is a system configuration diagram of a data broadcasting system according to a best embodiment of the present invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a block diagram of the receiving station data broadcast transmission system based on the best embodiment of this invention. FIG. 3 is a functional block diagram of a transport stream converter according to the best embodiment of the present invention. It is a figure explaining the transport packet in the best embodiment of this invention. It is a figure explaining the section data in the best embodiment of this invention. It is a transport stream converter which concerns on the best embodiment of this invention, Comprising: It is a functional block diagram in the case of carousel transmission. In the best embodiment of the present invention, it is a diagram for explaining the transition of data transmitted in the receiving station data broadcast transmission system after a new carousel is transmitted from the originating system. It is a flowchart explaining the receiving station data broadcast transmission method in the best embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Receiving system 110 ... Receiving data broadcast transmission system 111 ... Controller 112 ... Data broadcast transmission apparatus 113 ... Transport stream converter 120, 220 ... Multiplexer 130 ... Content management server 140 ... Data server 151 ... Progress table data 152 ... Trans Port stream separation unit 153 ... Sectioning unit 154 ... Carouseling unit 155 ... Giving unit 155 ... PID giving unit 156 ... Multiplexing unit 200 ... Originating system 210 ... Originating data broadcast transmission system

Claims (6)

A receiving data broadcast sending system for receiving a transport stream from a sending data broadcasting sending system and sending transport stream packets constituting a module,
When receiving a transport stream packet from the originating data broadcast transmission system, a sectioning unit that generates section data from the received transport stream and inputs it to a packet ID adding unit and a carouseling unit;
Storing the section data input from the sectioning unit, and when the module is restored and carousel data is generated, the carouseling unit inputs the carousel data to the packet ID assigning unit;
A packet ID adding unit that adds a packet ID to the section data input from the sectioning unit and the carousel data input from the carouseling unit and inputs the packet ID to the multiplexing unit;
A multiplexing unit that multiplexes and transmits the data input from the packet ID assigning unit;
When the carousel generating unit generates the carousel data, the packet ID assigning unit stops input of the section data input from the sectioning unit to the multiplexing unit and inputs from the carousel converting unit. The received carousel data is input to the multiplexing unit. The received data broadcasting transmission system according to claim 1, wherein the multiplexing unit transmits data input from the packet ID assigning unit at a transmission rate of the receiving station. When the transport stream is received from the originating data broadcast transmission system, a transport stream separating unit that reads out the progress table data and extracts a transport stream that matches the basic stream packet ID of the program broadcast at the receiving station is further provided. Prepared,
The sectioning unit generates the section data from the transport stream separated by the transport stream separation unit, and inputs the section data to the packet ID assigning unit and the carouseling unit. 2. The receiving station data broadcast transmission system according to 2. A receiving data broadcast sending method for receiving a transport stream from a sending data broadcasting sending system and sending transport stream packets constituting a module,
When a transport stream packet is received from the originating data broadcast transmission system by the sectioning unit, section data is generated from the received transport stream and input to the packet ID assigning unit and the carouseling unit; ,
The section data input from the sectioning unit is accumulated by the carousel unit, and when the module is restored and carousel data is generated, the carousel data is input to the packet ID assigning unit;
A step of adding a packet ID to the multiplexing unit by adding a packet ID to the section data input from the sectioning unit and the carousel data input from the carouseling unit by the packet ID assigning unit;
A step of multiplexing and transmitting the data input from the packet ID assigning unit by the multiplexing unit;
When the carousel generating unit generates the carousel data, the packet ID assigning unit stops the input of the section data input from the sectioning unit to the multiplexing unit and inputs from the carousel converting unit. And receiving the transmitted carousel data to the multiplexing unit. 5. The receiving station data broadcast transmission method according to claim 4, wherein the multiplexing unit transmits data input from the packet ID assigning unit at a receiving station transmission rate. When the transport stream is received from the originating data broadcast transmission system by the transport stream separating unit, the progress table data is read and the transport stream coincides with the basic stream packet ID of the program broadcast at the receiving station. A step where the stream is extracted;
The sectioning unit further includes the step of generating the section data from the transport stream separated by the transport stream separating unit and inputting the data to the packet ID assigning unit and the carouseling unit. The receiving data broadcasting transmission method according to claim 4 or 5.

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