JP4556353B2 - Data broadcast transmission method and data broadcast transmission device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data broadcast transmission method and a data broadcast transmission device. More particularly, the present invention relates to a data broadcast transmission method and a data broadcast transmission apparatus that update a module at a desired timing in a carousel transmission type data broadcast and preferentially transmit the update module, thereby speeding up screen update on the reception side. .
[0002]
[Prior art]
In the prior art, in data broadcasting by digital broadcasting, a program = content described in BML language (Broadcast Markup Language) that can be interpreted by a receiver is set as DSM-CC (Digital Storage Media Command) defined in the ISO / IEC13818-6 standard. and Control) is repeatedly sent to the receiver by the carousel transmission method.
[0003]
First, a data broadcasting mechanism based on the DSM-CC carousel method will be described with reference to FIG. Content described in BML language transmitted by data broadcasting = BML content 500 is generally composed of a plurality of files. Among the plurality of files constituting the BML content, the files 600 constituting the same screen on the receiving side are grouped as one, and a module 600 (A) which is synthesized into one file by multipartization of HTTP (Hyper Text Transfer Protocol). Module 610, B module 620...) Are created. The module 600 has a limited broadcasting band in digital broadcasting, so it is desired to reduce the transmission capacity as much as possible. For example, when only a part of the content being sent is updated, the part to be updated is sent in module units. The BML content can be updated, and other modules can reduce the transmission (sending) capacity by using the previous (existing) module.
[0004]
Next, each module (A module 610, B module 620,...) Of the created module 600 is divided into blocks of units called DDB (Download Data block) 700 having a fixed size (4066 bytes). The block numbers are assigned to the divided DDBs 710 (DDB711, 712,...), DDB720,..., And the module 600 is arranged by arranging the DDBs 700 (DDB711, 712. (A module 610, B module 620...) Can be reconfigured. Also, a block called DII (Download Info Indication) 750 describing the configuration information of each module constituting the BML content 500 is created.
[0005]
Further, the created DDB 700 and DII 750 are divided into TS packets 800 (TS packets 811a..., TS812a...) Having a predetermined size (188 bytes) for transmission by digital broadcasting. The divided TS packets 800 are sent out in a predetermined order to a predetermined position = slot 910 of the transport stream for each module unit and transmitted as a carousel 900. When transmission of all TS packets 800 is completed, transmission of the same TS packet 800 (TS packet 811a...) In the same order is repeated again from the beginning.
[0006]
FIG. 7 schematically shows the time when the BML content 500 is transmitted by the carousel transmission method. The BML content 500 is a single file formed by combining HTTP files into a single file including files constituting the same screen. The A module 610, the B module 620, the C module 630, and the D module 640 synthesized are created, and then the created A module 610 to D module 640 are each fixed to a DDB 700 (DDB 711, 722...). The DII 750 describing the configuration information of each module is created. Further, the created DDB 700 and DII 750 have TS packets of a predetermined size such that the A module 610 has TS packets 811a... 812a..., The B module 620 has TS packets 821a. It is divided into. Then, the divided TS packet 800 is transmitted in a predetermined order to a predetermined position = slot 910 of the transport stream for each module unit and transmitted as a carousel 900.
[0007]
In this case, the TS packet 850 constituting the DII 750 which is the base point of the carousel 900 is sent out first, and then the TS packet group divided in the order of A module 610 → B module 620 → C module 630 → D module 640 is sent out. When the transmission of the TS packet is completed, the transmission of the TS packet is repeated again in the order of the same order DII750 → A module 610 → B module 620 → C module 630 → D module 640 from the beginning.
[0008]
On the other hand, when receiving a TS packet including DII 750 among the TS packets 800 = carousel 900 repeatedly transmitted by the receiver, the data broadcast receiving side reconfigures TS packets 851 and 852 constituting the DII 750. The configuration information of each module (A module 610 to D module 640) is obtained. Next, referring to the configuration information of each module, each module is restored from the received TS packet, and the BML content configured by a predetermined file is reconfigured. Then, the reconstructed BML content is reproduced by the BML engine and displayed on the screen.
[0009]
[Problems to be solved by the invention]
However, when a certain module is updated, there is a problem that a new carousel including the update module must be transmitted after the next transmission timing as the base point of the carousel to update the module.
[0010]
For example, when a carousel is sent in the order of DII → A module → B module → C module → D module as shown in FIG. 7, immediately after sending DII (TS packet constituting the DII), When the B module update instruction is issued, it is necessary to wait for the carousel to go around in the order of DII → A module → B module → D module → C module, and to send a new carousel by the updated B module.
[0011]
On the other hand, on the receiving side, for example, when content that is important in immediacy such as stock price information or disaster information is updated, the updated content (module) is not immediately reflected.
[0012]
Therefore, in data broadcasting by the carousel transmission method, it is necessary to be able to update the content (module) to be updated at a desired timing and to display the updated content (module) on the receiving side as quickly as possible. Has a problem that must be done.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, a data broadcast transmission method and a data broadcast transmission apparatus according to the present invention are configured as follows.
[0014]
(1) When updating a data broadcasting module to be transmitted by the carousel transmission method, the updated module is preferentially transmitted from a plurality of modules transmitted according to the carousel. Data broadcasting transmission method.
(2) The data according to (1), wherein the updated module is transmitted by interrupting a carousel being transmitted and sequentially transmitting the updated module in accordance with the carousel including the updated module. Broadcast transmission method.
(3) The data broadcast transmission method according to (2), wherein the updated module is repeatedly transmitted a plurality of times when the module is transmitted for the first time.
[0015]
(4) In data broadcasting by digital broadcasting, a data broadcasting transmission apparatus for transmitting contents in module units by the carousel transmission method, detecting means for detecting update information of the module in real time, and detecting the update information of the module A receiving means for receiving the update module, a means for generating an update carousel based on the update module, and sending out the module by the carousel being sent, and prioritizing the update module according to the generated update carousel. A data broadcast transmission device comprising: a transmission means for transmitting to the network;
(5) The means for generating the update carousel replaces only the received update module and the module transmitted in the carousel before update, and generates an update carousel to be transmitted in order from the update module. The data broadcast transmission device according to (4).
(6) The data broadcast transmission device according to (4), wherein the transmission unit transmits the update module a predetermined number of times.
(7) The data broadcasting transmission apparatus according to (4), wherein the transmission unit repeatedly transmits the updated module a plurality of times when it is transmitted for the first time.
[0016]
(8) An apparatus for transmitting a module that constitutes a content of data broadcasting by digital broadcasting, a means for receiving the module for transmission, a means for detecting module update information in real time, and a transmission according to the update information And a means for preferentially sending the update module specified by the update information.
(9) The data broadcast transmission apparatus according to (8), wherein the transmission unit replaces the module before the update with the update module and transmits the modules in order from the update module.
(10) The data broadcasting transmission apparatus according to (9), wherein the sending means sends an update module after sending the update module a predetermined number of times, and then sends an unupdated module.
[0017]
When update of a module is detected by such a data broadcast transmission method and data broadcast transmission apparatus, an updated carousel is generated by replacing only the update module with the module of the carousel before update, and the module is transmitted by the carousel being transmitted. It is possible to stop and send out modules in order from the update module according to the generated update carousel, so that the updated module (= content) is preferentially sent out, and the screen update on the receiving side is accelerated.
[0018]
Also, by sending the update module repeatedly several times when the update carousel is sent for the first time, if the data broadcast is received immediately after the update carousel is updated on the receiver side, the reception timing of the update module is lost. Can be prevented.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of a data broadcast transmission method and a data broadcast transmission apparatus according to the present invention will be described with reference to the drawings.
[0020]
FIG. 1 shows a transmission / reception system for data broadcasting by digital broadcasting, which is connected to a broadcasting program supply system 100 of a program provider that creates and provides contents as a broadcasting program via a network. A broadcaster's data broadcast transmission system 200 that transmits a broadcast program (content) sent from the broadcast program supply system 100 via a satellite or the like, and a reception system 300 that receives and reproduces the data broadcast. Is done.
[0021]
The broadcast program supply system 100 includes a real-time data transmission unit 110 and a module creation unit 120, and is always connected to the broadcaster's data broadcast transmission system 200 via a network such as a dedicated line.
[0022]
The real-time data transmission unit 110 has a function of making a module update request to the data broadcast transmission system 200 in real time and sending the update module created by the module creation unit 120.
[0023]
The module creation unit 120 collects BML (Broadcast Markup Language) content, which is composed of a plurality of files such as image files and character files, into one file on the receiving side. A module synthesized as one file by multipartization of HTTP (Hyper Text Transfer Protocol) is created and sent to the real-time data transmission unit 110 and the like.
[0024]
The data broadcast transmission system 200 includes a real-time data reception unit 210, a carousel generation unit 220, a data transmission unit 230, and a transmission antenna 240, and the broadcast program supply system 100 via a network such as a dedicated line. Always connected.
[0025]
The real-time data receiving unit 210 receives a broadcast program sent from the broadcast program supply system 100 in units of modules and sends it to the carousel generation unit 220. In addition, it has a function of constantly monitoring a module update request from the broadcast program supply system 100 (the real-time data transmission unit 110) and notifying the carousel generation unit 220 of the module update request.
[0026]
The carousel generation unit 220 divides the module sent from the real-time data reception unit 210 into a fixed size (4066 bytes) to create a DDB (Download Data block) and reconfigures each module. A DII (Download Info Indication) block describing the configuration information is created. Further, the created DII and DDB are divided into a predetermined size (188 bytes) for transmission by digital broadcasting to create a TS packet, and this TS packet is predetermined as a group of DII and each module = TS packet group. Are generated and sent to the data sending unit 230.
[0027]
When the carousel generating unit 220 detects a module update request from the real-time data receiving unit 210, the carousel generating unit 220 generates a DII for creating a new carousel = update carousel by the update module sent via the real-time data receiving unit 110. At the same time, the update module is divided into DDBs, and DII and DDB are further divided into TS packets to create TS packet groups of the update modules. Subsequently, a carousel update function for generating an updated carousel arranged in the order of the TS packet group of the update module at the head and the TS packet group constituting the module that has not been updated, starting from the new DII is provided. .
[0028]
The data transmission unit 230 uploads the TS packet group (= data broadcast program) transmitted according to the order of the carousel generated by the carousel generation unit 220 to the satellite 250 via the transmission antenna 240 as a transport stream. Also, when sending an updated carousel, the TS packet group constituting the update module is repeatedly sent out from the top a plurality of times at the first transmission, and then sent in the order of the TS packet group constituting the non-updated module. Generate and send out an ordered carousel. Note that the update module may be transmitted not only at the first transmission but also multiple times in the desired order to the update carousel.
[0029]
The satellite 250 relays the transport stream uploaded from the transmission antenna 240 and transmits it to the reception system 300. It should be noted that transmission / reception with the receiving system 300 is not limited to using a satellite, but can be performed using a terrestrial wave or a wired network.
[0030]
The reception system 300 includes a reception antenna 310 that receives a data broadcast from the satellite 250 and a receiver 320 that receives the data broadcast (= TS packet group) received by the reception antenna 310. When the receiver 320 detects the TS packet constituting the DII from the data broadcast = TS packet group received by the receiving antenna 310, the receiver 320 reconstructs the DII and obtains the configuration information of each module constituting the broadcast program. Next, referring to the configuration information of each module, the DDB → module is reconfigured from the received TS packet, the desired module is restored, and the restored module (multiple files) is played back by the BML engine and displayed. indicate.
[0031]
In such a data broadcasting transmission / reception system transmitted by the carousel transmission system, the operation when updating the content of data broadcasting = module will be described with reference to the drawings.
[0032]
First, the currently transmitted data broadcast carousel includes TS packet groups 10 to 40 (hereinafter referred to as an A module 10, a B module 20, a C module 30, and a D module 40) constituting the A to D modules as shown in FIG. And DII5 TS packet group 50 (hereinafter referred to as DII50) having the configuration information of each module, and DII50 → A module 10 → B module 20 → C module 30 → D module 40 It is repeatedly sent in order (ST10).
[0033]
In the data broadcast transmission system 200, first, it is determined whether or not the data broadcast (carousel) currently being broadcast has ended (ST11). If the broadcast is not finished, the module update request from the broadcast program supply system 100 (its real-time data transmission unit 110) is monitored (ST13). If there is no module update request (interrupt), the carousel is continued to be transmitted, and it is determined again whether or not the carousel currently being transmitted has ended, and the monitoring of the module update request is repeated (ST13 → ST10 → ST11). When the data broadcast is finished, the carousel transmission is stopped (ST12).
[0034]
On the other hand, the real-time data receiving unit 210 of the data broadcast transmission system 200 checks the module update request sent from the broadcast program supply system 100 via the network in real time, and repeats the check if there is no update request (ST20). . When the module update request is detected, the real-time data receiver 210 receives the update module sent from the real-time data transmitter 110 of the broadcast program supply system 100 and sends it to the carousel generator 220 (ST21).
[0035]
Here, a case where the B module 20 is updated will be described as an example (see FIG. 2). When the carousel generation unit 220 acquires the update module of the B module 20 sent via the real-time data reception unit 210, the carousel generation unit 220 creates the update carousel DII and divides the update module into DDBs (ST22). Further, the created DII and DDB are divided into update module DDBs in the TS packet part to create TS packets (ST23).
[0036]
Subsequently, in the carousel generation unit 220, as shown in FIG. 4, the TS packet group of the new DII = DII50 ′ is used as a base point, the TS packet group of the update module = B module 20 ′ is placed at the head, The update carousel in the order (DII 50 ′ → B module 20 ′ → C module 30 → D module 40 → A module 10) in which the non-updated A module 10, C module 30, and D module 40 are sequentially arranged. Generate (ST24). Then, the data transmission unit 230 is interrupted to replace the currently transmitted carousel (see FIG. 2) (ST25).
[0037]
When the data transmission unit 230 detects an interrupt from the module generation unit 220, the data transmission unit 230 uses the carousel (see FIG. 2) that repeatedly transmits data in the order of DII 50 → A module 10 → B module 20 → C module 30 → D module 30. Module sending is stopped (ST14).
[0038]
Subsequently, the data transmission unit 230 transmits each module according to the updated carousel from the carousel generation unit 220. Here, when each module is sent out by the update carousel, the B module 20 ′, which is the update module, is repeatedly sent out from the carousel generation unit 220 a plurality of times at the first transmission, and the DII 50 ′ → B module as shown in FIG. Each module is transmitted according to the carousel in the order of 20 ′ → B module 20 ′ → C module 30 → D module 40 → A module 10 (ST15). When the first carousel is completed, transmission of each module is repeated according to the updated carousel created in the order of DII 50 ′ → B module 20 ′ → C module 30 → D module 40 → A module 10 from the carousel generating unit 220 (ST16). → ST10).
[0039]
The carousel = TS packet group transmitted by the data transmission unit 230 is uploaded to the satellite 250 by the transmission antenna 240 and transmitted to the reception system 300 via the satellite 250.
[0040]
In the receiving system 300, when the data broadcast (= update carousel) received by the receiving antenna 310 is received by the receiver 320 and DII 50 'is detected, the configuration information of each module constituting the broadcast program by reconfiguring DII. Get. Next, referring to the configuration information of each module, the DDB → module is reconfigured from the received TS packet, the desired module is restored, and the restored module (multiple files) is played back by the BML engine and displayed. indicate.
[0041]
【The invention's effect】
When updating the content (broadcast program) = module being transmitted by the data broadcast transmission method and the data broadcast transmission apparatus as described above, even if the carousel is being transmitted, the carousel currently being transmitted is interrupted. The module can be transmitted by an update carousel that preferentially transmits an update module. Therefore, even if the content is updated at an arbitrary timing, it is possible to quickly reflect the updated content (update module) to the receiving side. For example, content with immediacy such as earthquake information and stock price information is also important. It can be displayed faster.
[0042]
In addition, when the data transmission is received immediately after the updated carousel is transmitted on the receiver side by repeatedly transmitting the updated module at the first transmission of the module by the updated carousel, the analysis of DII ends. Since the update module arrives before, it can be prevented that the update module cannot be received until the update carousel makes a round as a result.
[Brief description of the drawings]
FIG. 1 is a schematic diagram schematically showing a configuration of a digital broadcast data broadcast transmission / reception system using a data broadcast transmission method according to the present invention.
FIG. 2 is a schematic diagram schematically showing a configuration of a carousel transmitted by a data broadcast transmission method and a data broadcast transmission apparatus according to the present invention.
FIG. 3 is a flowchart showing a procedure when a carousel is updated by a data broadcast transmission method and a data broadcast transmission apparatus according to the present invention.
FIG. 4 is a schematic diagram illustrating the configuration of a carousel when the carousel is updated according to the present invention.
FIG. 5 is a schematic diagram illustrating a configuration of a carousel that is transmitted at the first transmission when the carousel is updated by the data broadcast transmission method and the data broadcast transmission apparatus according to the present invention.
FIG. 6 is a schematic diagram illustrating a process of generating a carousel for data broadcasting by a carousel transmission method.
FIG. 7 is a schematic diagram illustrating a configuration of a carousel transmitted by data broadcasting using a carousel transmission method.
[Explanation of symbols]
100; broadcast program supply system 110; real-time data transmission unit 120; module creation unit 200; data broadcast transmission system 210; real-time data reception unit 2220; carousel generation unit 230; data transmission unit 240; 250; Satellite 300; Reception system 310; Reception antenna 320; Receiver 5; DII 10; A module TS packet group 20; B module TS packet group 30; C module TS packet group , 40; TS packet group of D module, 20 '; TS packet group of update B module, 50'; Update DII, 500; BML content, 510; File, 520; File, 600; Module, 610; ), 620; Module (B module) ), 700; DDB, 710, 711, 712; DDB (A module), 720, 721; DDB (B module), 750; DII, 800; TS packet, 810, 811, 811a, 812, 812a; TS packet ( A module), 820, 821, 821a, 822, 822a; TS packet (B module), 850; TS packet (DII), 900; carousel, 910; slot, 5A; DII, 10A; 20A; TS packet group of B module, 30A; TS packet group of C module, 40A; TS packet group of D module

Claims (2)

When updating a data broadcasting module to be transmitted by the carousel transmission method, the updated update module is detected in real time from a plurality of modules transmitted according to the carousel , and the update module is preferentially transmitted. ,
In the preferential transmission of the update module, the carousel being transmitted is interrupted, an update carousel including the update module is generated, and the update module is repeatedly transmitted from the top when the update carousel is transmitted for the first time. A data broadcast transmission method characterized by the above. In data broadcasting by digital broadcasting, a data broadcasting transmission device that transmits contents transmitted from a broadcast program supply system in units of modules by a carousel transmission method,
Means for detecting update information of the module transmitted from the broadcast program supply system in real time; reception means for receiving an update module from the broadcast program supply system when update information of the module is detected; and the update module And an update carousel for generating the update carousel based on the transmission carousel, and sending the update carousel repeatedly from the beginning when sending the update carousel for the first time. A data broadcasting transmission device characterized by that.

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