JP2012060404A - Digital community system and content server of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital community system capable of providing a video and information related to the video from a community facility to a receiver side by a data broadcast content.SOLUTION: In a content server, a comparison list where a management number and a name of a video taken by a camera are mapped with a data broadcast content to be supplied by interlocking to the video is previously stored in a database. When video switch information including the management number of the video to be switched is received from a CCTV server, control means refers to the comparison list in the database based on the management number of the video included in the video switch information, dynamically generates the data broadcast content based on the reference result, and transmits it to a data broadcast transmission device to distribute the data broadcast content to respective television receivers in advance. Event transmitting means transmits a switch instruction of the video to the CCTV server after the transmission, and transmits an event message for switching to the data broadcast content to the respective television receivers.

Description

  Embodiments described herein relate generally to a digital hearing system that distributes a digital broadcast signal to each broadcast receiving terminal device, and a content server used in this system.

  In public offices or the like having a hearing facility that modulates analog video from a surveillance camera or the like into a broadcast wave and distributes it to the facility by wire, the digital broadcasting system is being adapted. In this case, in addition to digitizing analog video from a surveillance camera or the like, it is also conceivable to distribute information in the facility as a data broadcast. In data broadcasting, local information corresponding to the zip code set in the receiver is provided.

  In general, in data broadcasting, for example, components including BML (Broadcasting Markup Language) content constituting a program are divided into data called sections, and repeated in units of carousel based on BCML (Broadcast Contents Markup Language) information as management information. Send it out. A carousel is a collection of section data. The receiver 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.

JP 2009-147476 A

  By the way, there are many analog videos input to the hearing equipment, and the videos are switched asynchronously at an arbitrary timing from another system (hereinafter referred to as a CCTV system). For this reason, when the video is distributed as one program of digital broadcasting, the data broadcasting technology currently used cannot provide information related to the video.

  In addition, when data broadcasting content related to video is dynamically created and distributed from a digital broadcasting facility to a receiver, the delay time for displaying the data broadcasting content on the receiver side is about several tens of seconds. And data broadcasting content cannot be synchronized.

  It is an object of the present invention to provide information related to a video together with video from a hearing facility to the receiver side by data broadcasting content, and to display video and data broadcasting without delay in displaying the data broadcasting content on the receiver side. An object of the present invention is to provide a digital hearing system that can switch contents in synchronization and a content server used in the system.

  According to the embodiment, a digital broadcast signal is distributed via a communication network, and a digital broadcast transmission unit that switches a video being distributed to an arbitrary video in response to a video switching control start request, and the communication network. A content server that generates association information to be provided in conjunction with an image of a digital broadcast signal based on an instruction that is connected and notified from a digital broadcast transmission unit, association information generated by the content server, and digital broadcast transmission And an organization unit that multiplexes the digital broadcast signal transmitted by the unit and transmits the multiplexed signal to a broadcast receiving terminal device that selectively reproduces the multiplexed signal, and the content server identifies the video of the digital broadcast signal Storage means for storing a list in which video IDs and association information to be provided in association with the video are associated; When the video switching information including the video ID to be switched is received from the tall broadcast transmission unit, the list stored in the storage unit is referred to based on the video ID included in the video switching information, and based on the reference result A control unit that generates association information corresponding to the video ID, sends the association information corresponding to the video ID to the organization unit, and then transmits a video switching control start request to the digital broadcast transmission unit, and the control unit It is possible to provide a digital common hearing system including event transmission means for transmitting an event message for switching to association information to the broadcast receiving terminal device after transmission of the association information.

It is a block diagram which shows the structure of the digital common hearing system which concerns on 1st Embodiment. It is a figure which shows an example of the memory content of the database of the content server shown in the said FIG. It is a figure which shows the structure of data broadcasting content. It is a figure which shows an example by which data broadcasting content is converted into a carousel. It is a block which shows the structure of the digital common hearing system which concerns on 2nd Embodiment. It is a block which shows the structure of the CCTV system which concerns on 3rd Embodiment. It is a figure which shows an example of the memory content of the group table which the CCTV server shown in the said FIG. 6 has.

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

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a digital hearing aid system according to the first embodiment. This system is roughly divided into a CCTV system 1A and a hearing facility 2A.

  In the CCTV system 1A, cameras 111 to 11n (n is an integer) are installed for monitoring around roads and rivers. Analog video signals captured by the cameras 111 to 11n are sent to the encoders 121 to 12n, respectively.

  Each of the encoders 121 to 12n encodes the input video signal by, for example, MPEG2 (Moving Picture Experts Group 2) system, and each encoded output is supplied to the decoder 130 via the IP network NW. The decoder 130 receives an arbitrary digital video signal on the IP network NW by video switching control from the CCTV server 140, converts it into an analog video signal, and sends it as one wave.

  The analog video signal sent from the CCTV system 1A having the above configuration is sent to the broadcast format encoder 210 of the digital broadcasting device installed in the hearing aid facility 2A via a wired or wireless network.

  The broadcast format encoder 210 converts the analog video signal supplied from the CCTV system 1A into a broadcast format, for example, an MPEG2-TS (Transport Stream) signal. The output of the broadcast format encoder 210 is multiplexed with the data broadcast content TS signal by the multiplexer 220 and supplied to the OFDM modulator 230.

  The OFDM modulator 230 converts the multiplexed TS signal into a digital broadcast standard OFDM (Orthogonal Frequency Division Multiplex) signal, converts the frequency into a predetermined RF (Radio Frequency) band, and outputs one wave of the digital broadcast signal. Is output to the mixing / distributing device 240 as an RF signal.

  The mixing / distributing device 240 mixes the RF signal output from the OFDM modulator 230 and the terrestrial digital broadcast wave received by the antenna AT, and distributes them to the television receivers 301 to 30i (i is an integer). Each of the television receivers 301 to 30i receives the RF signal from the mixing / distributing device 240, and selects and operates a channel by a remote controller, for example, so that the TS packet of the selected channel can be separated and demodulated and reproduced and displayed. .

  By the way, in the first embodiment, the CCTV system 1A is provided with the CCTV server 140 and the console 150, and the common hearing equipment 2A is provided with the content server 250. The CCTV server 140, the console 150, and the content server 250 are connected to each other via the IP network NW.

  After receiving the control request from the console 150, the CCTV server 140 notifies the content server 250 of video information (management number, name, etc.) as a video ID, and in response to a video switching start request from the content server 250. Video switching control is performed on the decoder 130.

  The console 150 is for selecting the video of the camera 111 to be output from the decoder 130, and the selection result is transmitted to the CCTV server 140 as a control request.

  The content server 250 has a database 251 for storing a comparison list in which information (river information near the video, road information, etc.) to be provided in association with each video information input to the hearing facility 2A is associated. As shown in FIG. 2, the database 251 includes video information such as a video management number and name, a BML (Broadcasting Markup Language) document constituting a screen frame including a surrounding map, an image file indicating a weather mark, an air temperature, and a water level. A comparison list representing a correspondence relationship with a text file indicating road information such as river information such as accidents and traffic jams is stored.

  That is, the content server 250 acquires telemeter information and regulation information from a river information / road information system or the like that is an information provider for data broadcasting content, and stores it in the database 251.

  Further, the content server 250 includes a content transmission control unit 252 and an event transmission control unit 253. The content transmission control unit 252 receives the notification of the video switching information from the CCTV server 140, and generates and transmits the data broadcast content according to the comparison list stored in the database 251. Also, in order to synchronize the video and information on the data broadcast screen, a video switching control start request is sent to the CCTV server 140 after the content is sent.

  The event transmission control unit 253 performs event message notification control start request control to the data broadcast transmission device 260 after the content transmission control unit 252 transmits the content.

  The data broadcast transmission device 260 converts the data broadcast content received from the content server 250 into a broadcast format TS signal. In addition, after receiving the event message notification control start request, the event message is transmitted to the television receivers 301 to 30i.

  The operation of the above configuration will be described below.

  First, in this system, the multiplexing device 220 multiplexes the video signal + data broadcasting content by assigning it to channel # 1. At this time, the data broadcast content is screen-synthesized with the video signal. The output of the multiplexer 220 is converted into an RF signal by the OFDM modulator 230 and sent to the television receivers 301 to 30i compatible with digital broadcasting. Only the video signal may be assigned to channel # 2, and only the data broadcast content may be assigned to channel # 3.

  In this way, in this system, if broadcasting is performed by dividing the viewing mode for each channel, each television receiver 301 to 30i can view the data broadcast content in any viewing mode simply by switching the channel. .

  Now, in the CCTV system 1A, it is assumed that the operator selects the video of the camera 111 by operating the console 150 in order to broadcast a video of a river that requires caution. Here, a video selection request including information on the management number of the selected camera 111 is transmitted to the CCTV server 140 via the IP network NW (FIG. 1 (1)).

  Upon receiving the video selection request, the CCTV server 140 transmits a video switching notification including the management number of the camera 111 to the content server 250 via the IP network NW (FIG. 1 (2)).

  The content server 250 refers to the comparison list stored in the database 251 based on the management number “A-01” of the camera 111 sent from the CCTV server 140 and included in the video switching information, and this management number “A-01”. A data broadcast content including a video name “XX river” corresponding to, a BML content indicating a map around the camera, an image file indicating weather, a text file indicating temperature, water level, etc. is generated (FIG. 1 (3)). The data is transmitted to the data broadcast transmission device 260.

  Then, the data broadcast transmission device 260 converts the data broadcast content into a carousel and transmits it as a TS (FIG. 1 (4)). Here, in one carousel, as shown in FIG. 3, the number of sections (number of blocks) of the contents composed of the three modules A to C (module IDs 1 to 3) is 6, 2, and 3, respectively. For example, module A is BML content, module B is an image file, and module C is a text file.

  One carousel is assumed to be arranged in the order shown in FIG. The DII (Download Information Indication) of TS describes the IDs of all modules A to C.

  After transmitting the data broadcast content, the content server 250 transmits a video switching control start request to the CCTV server 140 and transmits an event message notification control start request to the data broadcast transmission device 260 (FIG. 1 (5)).

  When the CCTV server 140 receives the video switching control start request from the content server 250, the CCTV server 140 performs video switching control on the decoder 130 so that the encoded output of the encoder 121 is decoded by the decoder 130 (FIG. 1 (6)). In addition, when receiving the event message notification control start request from the content server 250, the data broadcast transmission device 260 transmits an event message (event notification) for switching to the data broadcast content to each television receiver 301 to 30i.

  By this event notification, the viewers of the respective television receivers 301 to 30i can know in real time the surrounding conditions such as XX rivers to be alerted by selecting and operating channel # 1 to which data broadcast content is distributed.

  As described above, in the first embodiment, in the content server 250, the comparison list in which the management number of the video captured by the cameras 111 to 11n and the data broadcast content to be provided in association with the video are associated with each other. When video switching information that is stored in advance in the database 251 and includes the video management number of the video to be switched from the CCTV server 140 is received, the video in the database 251 is stored based on the video management number included in the video switching information. By referring to the comparison list, data broadcast content is dynamically generated based on the reference result, sent to the data broadcast sending device 260, and the data broadcast content is distributed in advance to each of the television receivers 301 to 30i. After the data broadcast content is transmitted to the broadcast transmission device 260, the video switching instruction is given to the CCTV server 140. Transmits the, so that for each television receiver 301~30i transmits an event message for switching to the data broadcast contents.

  Therefore, it is possible to simultaneously switch the digital broadcast video and the data broadcast content displayed on the television receivers 301 to 30i in synchronization with each other without delaying the display of the data broadcast content on the television receivers 301 to 30i side.

(Second Embodiment)
FIG. 5 is a block diagram showing a configuration of a digital hearing aid system according to the second embodiment. In FIG. 5, the same parts as those in FIG.

  In the CCTV system 1B, the CCTV server 160 transmits a video switch notification to the content server 250 to switch from the camera 111 to the camera 115, for example, every preset time.

  In the hearing facility 2 </ b> B, information associated with the video generated by the content server 250 is supplied to the composition device 270. This organizing device 270 takes in the association information composed of text data from the content server 250, demodulates the TS signal sent from the broadcast format encoder 210 into a video signal, and synthesizes the association information at a predetermined location of the demodulated video signal. To the OFDM modulator 230.

  The operation of the above configuration will be described below.

  For example, in the CCTV server 160 provided in the CCTV system 1B, for example, by measuring a preset time, the CCTV server 160 sends a video switching notification including the management number of the camera 111 to the content server 250 via the IP network NW. Transmit (FIG. 5 (1)).

  The content server 250 refers to the comparison list stored in the database 251 based on the management number “E-05” of the camera 115 included in the video switching information sent from the CCTV server 160, and this management number “E-05”. Is generated (for example, telop information for displaying “accident occurrence” in the video) (FIG. 5 (2)) and sent to the knitting apparatus 270 (FIG. 5 (3)).

  The composition device 270 then demodulates the TS signal sent from the broadcast format encoder 210 into a video signal, synthesizes the association information at a predetermined location of the demodulated video signal, and sends it to the OFDM modulator 230. Note that the screen composition performed by the knitting device 270 at this time may be performed only for video signals sent to some channels or may be performed for video signals sent to all channels.

  Further, after sending the association information, the content server 250 transmits a video switching control start request to the CCTV server 160 and transmits an event message notification control start request to the composition device 270 (FIG. 5 (4)).

  When the CCTV server 160 receives the video switching control start request from the content server 250, the CCTV server 160 performs video switching control on the decoder 130 so that the encoded output of the encoder 125 is decoded by the decoder 130 (FIG. 5 (5)). In addition, when receiving the event message notification control start request from the content server 250, the composition device 270 demodulates the TS signal sent from the broadcast format encoder 210 into a video signal, and associates association information with a predetermined location of the demodulated video signal. The screen is synthesized and sent to the OFDM modulator 230. Thus, the viewers of the television receivers 301 to 30i can select, for example, channel # 1 and check in real time the telop where the accident occurred on the road.

  As described above, in the second embodiment, the CCTV server 160 notifies the content server 250 of the video switching information every preset time, so that the operator's manual operation is performed on the CCTV system 1B side. Without any need, the video of any camera 115 can be automatically switched to provide association information.

  Further, according to the second embodiment, since the knitting device 270 superimposes the characters of the association information on the video screen of the digital broadcast signal, synchronization processing or the like is not required, and the configuration of the hearing equipment 2B is simplified. It becomes.

(Third embodiment)
FIG. 6 is a block diagram showing a configuration of a CCTV system according to the third embodiment. In FIG. 6, the same parts as those in FIGS. 1 and 5 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the third embodiment, the cameras 111 to 11n and the CCTV servers 140 and 160 are divided into groups G1 and G2. CCTV servers 140 and 160 store a group table. As shown in FIG. 7, the group table shows the correspondence between the groups G1 and G2 and the plurality of cameras 111 to 11n belonging to the groups G1 and G2, information specifying the switching method for each group, and the cameras for the groups. This information is stored together with information specifying the registration method.

  For the registration method of cameras to the group, for example, a method of automatically registering when the camera starts up, a method of individually registering each camera by a user registration operation, and a batch operation by an operator registration operation at a specific terminal And then register.

  Each time the CCTV server 160 measures a preset time, the CCTV server 160 refers to the group table and sequentially selects the cameras 111, 112, and 113 belonging to its own group G1, and transmits the camera video from the decoder 130.

  On the other hand, when a selection request arrives from the console 150, the CCTV server 140 refers to the group table and sends out the designated camera video in the cameras 114 to 11n belonging to its own group G2 from the decoder 130. . Note that as many decoders 130 as the number of groups are prepared. That is, in this embodiment, the decoder 130 is configured in a double manner.

  As described above, in the third embodiment, by associating a group with the cameras 111 to 11n and the CCTV servers 140 and 160, an arbitrary camera image can be obtained by a video switching request from the operator of the console 150 in a certain group. On the other hand, an appropriate digital broadcast signal, that is, a camera video switching process can be performed for each group so that another group automatically switches to an arbitrary camera video.

(Other embodiments)
In the first embodiment, the example in which the content server 250 creates BML content has been described. In addition to this, for example, the data broadcast transmission device 260 may be provided with a function of creating BML content. In this way, the processing load on the content server 250 can be reduced, and a general-purpose server can be used.

  In addition, it is not limited to the above-described embodiment as it is, and in the implementation stage, the constituent elements can be modified and embodied without departing from the scope of the invention. Moreover, an appropriate combination of a plurality of constituent elements disclosed in the above embodiment may be used. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  According to these embodiments, the digital broadcast video and the data broadcast association information displayed on the receiver side can be synchronized and switched simultaneously without display delay of the data broadcast association information on the receiver side.

  1A, 1B ... CCTV system, 2A, 2B ... Hearing equipment, 111-11n ... Camera, 121-12n ... Encoder, 130 ... Decoder, 140 ... CCTV server, 150 ... Console console, 210 ... Broadcast format encoder, 220 ... Multiplex 230 ... OFDM modulator, 240 ... mixing / distributing device, 250 ... content server, 251 ... database, 252 ... content transmission control unit, 253 ... event transmission control unit, 260 ... data broadcast transmission device, 270 ... organization device, 301 to 30i: Television receivers.

Claims (11)

A digital broadcast transmission unit that distributes a video of a digital broadcast signal via a communication network, and switches a video being distributed to an arbitrary video in response to a video switching control start request;
A content server connected to the communication network and generating association information to be provided in conjunction with the video of the digital broadcast signal based on an instruction notified from the digital broadcast transmission unit;
An organization unit that multiplexes the association information generated by the content server and the digital broadcast signal transmitted by the digital broadcast transmission unit, and transmits the multiplexed signal to a broadcast receiving terminal device that selectively reproduces the multiplexed signal. Equipped,
The content server
Storage means for storing a list in which a video ID for specifying a video of the digital broadcast signal is associated with association information to be provided in association with the video;
When video switching information including a video ID to be switched is received from the digital broadcast transmission unit, a list stored in the storage unit is referred to based on the video ID included in the video switching information. Control for generating association information corresponding to the video ID based on the result, sending the association information corresponding to the video ID to the composition unit, and then transmitting a video switching control start request to the digital broadcast transmission unit Means,
An event transmitting means for transmitting an event message for switching to the association information to the broadcast receiving terminal device after sending the association information by the control means. The digital broadcasting system according to claim 1, wherein the digital broadcast transmission unit notifies the content server of the video switching information every preset time. The digital broadcasting system according to claim 1, wherein the digital broadcast transmission unit notifies the content server of the video switching information by an instruction input. A plurality of digital broadcast transmission units are provided, and the plurality of digital broadcast transmission units are set in advance for the content server and a first group for notifying the content server of the video switching information by inputting a video switching instruction. 2. The digital hearing system according to claim 1, wherein the system is divided into a second group for notifying the video switching information every time. The digital organization system according to claim 1, wherein the organization unit includes screen composition means for superimposing characters of the association information on a video screen of the digital broadcast signal. The organizing unit converts the association information sent from the content server into data broadcast content having the signal format of the digital broadcast signal, and multiplexes the output of the signal converter and the digital broadcast signal. The digital hearing aid system according to claim 1, further comprising: 7. The digital hearing system according to claim 6, wherein the multiplexing unit synthesizes the data broadcast content with a digital broadcast signal sent to all or some of the channels. 2. The digital hearing system according to claim 1, wherein the content server includes BML generation means for generating the association information in a BML (Broadcasting Markup Language) format. 7. The digital listening system according to claim 6, wherein the signal conversion unit includes BML conversion means for converting the association information sent from the content server into a BML format and then converting the information into data broadcast content. . In a content server connected via a communication network to a digital broadcast transmitter that distributes a digital broadcast signal and switches the digital broadcast signal being distributed to an arbitrary digital broadcast signal in response to a video switching control start request.
Storage means for storing a list in which a video ID for specifying a video of the digital broadcast signal is associated with association information to be provided in association with the video;
When video switching information including a video ID to be switched is received from the digital broadcast transmission unit, a list stored in the storage unit is referred to based on the video ID included in the video switching information. Based on the result, association information corresponding to the video ID is generated, and the association information corresponding to the video ID is sent to a composition unit that multiplexes the digital broadcast signal with other signals and transmits the signal to the broadcast receiving terminal device. Then, a control means for transmitting a video switching control start request to the digital broadcast transmission unit thereafter,
A content server comprising: an event transmission unit configured to transmit an event message for switching to the association information to the broadcast receiving terminal device after the association information is transmitted by the control unit. 11. The content server according to claim 10, further comprising BML generation means for generating the association information in a BML (Broadcasting Markup Language) format.

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