CN104581036A - Multi-screen control method and device for performing video and audio multi-screen display - Google Patents
Multi-screen control method and device for performing video and audio multi-screen display Download PDFInfo
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Abstract
The invention discloses a multi-screen control method and a multi-screen control device for performing video and audio multi-screen display. The device comprises a master control daughter board, a switch and control module, a decoding daughter board, and a video and audio output display daughter board; the master control daughter board receives an external display command from a communication client, and transmits the external display command to the switch and control module; the switch and control module receives an external display command from the master control daughter board, transmits an external data source identifier in the command to the decoding daughter board, receives the video and audio data fed back by the decoding daughter board, and transits the video and audio data to the video and audio output display daughter board according to display parameters; the decoding daughter board receives video and audio encoding data from other multi-screen control devices through an IP network, receives the external data source identifier from the switch and control module, decodes the received video and audio encoding data corresponding to the external data source identifier, and transmits the decoded video and audio data to the switch and control module. According to the scheme, the video and audio data can be shared among more than two multi-screen control devices.
Description
Technical field
The present invention relates to video and audio multidisplay technology, particularly relate to the multi-screen control method and device of carrying out video and audio multihead display.
Background technology
See Fig. 1, be the existing multi-screen control device structural representation carrying out video and audio multihead display, this multi-screen control device comprises video and audio acquisition module and multi-screen controller central processing module, and multi-screen controller central processing module connects and is connected with display wall;
The video/audio of Lacal Head End obtains equipment and makes a video recording, and by the passage between multi-screen controller central processing module, the video/audio of acquisition is sent to video and audio acquisition module; The video/audio of collection is sent to multi-screen controller central processing module by video and audio acquisition module; Multi-screen controller central processing module is selected, and the video/audio choosing passage corresponding is sent to video wall and carries out multihead display, video wall is spliced by polylith display screen.
It is concrete as digital hard disc video recorder (DVR that the video/audio of front end obtains equipment, Digital VideoRecorder), web camera (IPC, IP camera) etc. multiple, correspondingly, the video/audio signal that video and audio acquisition module receives has multiple, comprise Video Graphics Array (VGA, Video Graphics Array) signal, digital visual interface (DVI, Digital Video Interface) signal, Composite Video Baseband Signal (CVBS, CompositeVideo Broadcast Signal) etc.
Video and audio multihead display scheme is applied in field of video monitoring more, and the application scenarios of video monitoring has multiple, as scenes such as traffic, public place, public security, meetings.
In existing video and audio multihead display scheme, multi-screen control device can only show the video/audio that this locality gathers, and limitation is larger.
Summary of the invention
The invention provides a kind of multi-screen control device of carrying out video and audio multihead display, the video/audio that this device can realize between two or more multi-screen control device is shared.
The invention provides a kind of multi-screen control method of carrying out video and audio multihead display, the video/audio that the method can realize between two or more multi-screen control device is shared.
Carry out a multi-screen control device for video and audio multihead display, this device comprises master control daughter board, exchange and control module, decoding daughter board and video and audio output display daughter board;
Described master control daughter board, receives the outside idsplay order from telecommunication customer end, sends to described exchange and control module, and described outside idsplay order comprises the external data source mark and display parameters chosen;
Described exchange and control module, receive the outside idsplay order from described master control daughter board, and the external data source mark in outside idsplay order is sent to described decoding daughter board; Receive the video/audio of described decoding daughter board feedback, send to described video and audio output display daughter board according to display parameters;
Described decoding daughter board, the video encoding data from other multi-screen control device are received by IP network, receive the external data source mark from described exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to described exchange and control module;
Described video and audio output display daughter board, receives the video/audio from described exchange and control module, is sent to display wall and carries out multihead display, and carry out audio frequency broadcasting.
Carry out a multi-screen control method for video and audio multihead display, the method comprises:
Master control daughter board receives the outside idsplay order from telecommunication customer end, sends to exchange and control module, and outside idsplay order comprises the external data source mark and display parameters chosen;
Exchange and control module receive the outside idsplay order from master control daughter board, and the external data source mark in outside idsplay order is sent to decoding daughter board;
Decoding daughter board receives the video encoding data from other multi-screen control device by IP network, receive the external data source mark of self-exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to exchange and control module;
The video/audio of exchange and control module receipt decoding daughter board feedback, sends to video and audio output display daughter board according to display parameters;
Video/audio is sent to display wall and carries out multihead display by video and audio output display daughter board, and carries out audio frequency broadcasting.
As can be seen from such scheme, in multi-screen control device of the present invention, be provided with master control daughter board, exchange and control module, decoding daughter board and video and audio output display daughter board; Described master control daughter board, receives the outside idsplay order from telecommunication customer end, sends to described exchange and control module; Described exchange and control module, receive the outside idsplay order from described master control daughter board, and the external data source mark in outside idsplay order is sent to described decoding daughter board; Receive the video/audio of described decoding daughter board feedback, send to described video and audio output display daughter board according to display parameters; Described decoding daughter board, the video encoding data from other multi-screen control device are received by IP network, receive the external data source mark from described exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to described exchange and control module; Described video and audio output display daughter board, is sent to display wall and carries out multihead display, and carry out audio frequency broadcasting by video/audio.The present invention expands multi-screen control device, and also can check by local multi-screen control device the video/audio that nonlocal multi-screen control device gathers, thus the video/audio realized between two or more multi-screen control device is shared.
Accompanying drawing explanation
Fig. 1 is the multi-screen control device structural representation that prior art carries out video and audio multihead display;
Fig. 2 is the multi-screen Control system architecture schematic diagram that the present invention carries out video and audio multihead display;
Fig. 3 is the multi-screen control device structural representation that the present invention carries out video and audio multihead display;
Fig. 4 is the multi-screen control device structural representation example that the present invention carries out video and audio multihead display;
Fig. 5 is the method indicative flowchart that the present invention carries out the multi-screen control of video and audio multihead display.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
Day by day universal along with video monitoring, the scale implementing video surveillance point constantly expands, and the video monitoring apparatus of setting gets more and more; Multi-screen controller central processing module is arranged in different regional extents, when different video monitoring center checked by needs, during the video/audio of i.e. zones of different scope, need staff to rush for from this locality video monitoring apparatus that respective regions is checked at other video monitoring centers on the spot, or carrying out telephonic communication to obtain monitor message, it implements inconvenience.In light of this situation, the present invention expands multi-screen control device, and also can check by local multi-screen control device the video/audio that nonlocal multi-screen control device gathers, the video/audio realized between two or more multi-screen control device is shared; Thus, save human resources, optimize video monitoring.
See Fig. 2, for the present invention carries out the multi-screen Control system architecture schematic diagram of video and audio multihead display, this system comprises multiple multi-screen control device, the exchange of video data is carried out by IP network: the video/audio that this locality gathers by multi-screen controller central processing module sends to other multi-screen controller central processing modules by IP network between each multi-screen control device, and obtain the video/audio from other multi-screen controller central processing modules from IP network, be dealt into display wall and show.
See Fig. 3, be the structural representation of multi-screen control device each in Fig. 2, it comprises master control daughter board, exchange and control module, decoding daughter board and video and audio output display daughter board;
Described master control daughter board, receives the outside idsplay order from telecommunication customer end, sends to described exchange and control module, and described outside idsplay order comprises the external data source mark and display parameters chosen;
Described exchange and control module, receive the outside idsplay order from described master control daughter board, and the external data source mark in outside idsplay order is sent to described decoding daughter board; Receive the video/audio of described decoding daughter board feedback, send to described video and audio output display daughter board according to display parameters;
Described decoding daughter board, the video encoding data from other multi-screen control device are received by IP network, receive the external data source mark from described exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to described exchange and control module;
Described video and audio output display daughter board, receives the video/audio from described exchange and control module, is sent to display wall and carries out multihead display, and carry out audio frequency broadcasting.
The backboard of multi-screen control device self is with exchange and control module, in the present invention, also on the slot of backboard, insert decoding daughter board, master control daughter board and video and audio output display daughter board, to realize the video/audio shown on display wall from nonlocal multi-screen control device.
Preferably, described master control daughter board comprises the first communication module and multi-screen controller central processing module, and described decoding daughter board comprises the second communication module and video and audio decoder module; As shown in Figure 4, for multi-screen control device structural representation example provided by the invention, video and audio output display daughter board in figure comprises multiple video and audio output display module, one piece of display screen in each module correspondence display wall, in this example, hypothesis display wall has 4 pieces of display screens, video data is wherein sent to corresponding display screen and shows, and played back by broadcaster by voice data after receiving the video/audio of self-exchange and control module by each video and audio output display module;
Described first communication module, receives the outside idsplay order from telecommunication customer end and local idsplay order, sends to described multi-screen controller central processing module;
Described multi-screen controller central processing module, receives the outside idsplay order from described first communication module and local idsplay order, sends to described exchange and control module;
Described second communication module, receives the video encoding data from other multi-screen control device by IP network, sends to described video and audio decoder module;
Described video and audio decoder module, receive the video encoding data from described second communication module, receive the external data source mark from described exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to described exchange and control module.
Preferably, this multi-screen control device also comprises local video and audio and gathers daughter board, and described local video and audio gathers daughter board and comprises local video and audio acquisition module;
Described master control daughter board, also receives the local idsplay order from telecommunication customer end, sends to described exchange and control module, and described local idsplay order comprises the local channel mark and display parameters chosen;
Described exchange and control module, receive the local idsplay order from described master control daughter board, and source, the local channel mark in local idsplay order is sent to described local video and audio acquisition module; Receive the video/audio of described local video and audio acquisition module feedback, send to described video and audio output display daughter board according to display parameters;
Described local video and audio acquisition module, video/audio from local channel is gathered, receive the local channel mark from described exchange and control module, identify corresponding video/audio with local channel send to described exchange and control module by what gather.
The video/audio of Lacal Head End obtains equipment and makes a video recording, and obtains video/audio, by the passage between local video and audio acquisition module, the video/audio of acquisition is sent to local video and audio acquisition module.
It is concrete as digital hard disc video recorder (DVR that the video/audio of front end obtains equipment, Digital VideoRecorder), web camera (IPC, IP camera) etc., correspondingly, the video/audio signal that video and audio acquisition module receives has multiple, comprise Video Graphics Array (VGA, Video Graphics Array) signal, digital visual interface (DVI, Digital Video Interface) signal, Composite Video Baseband Signal (CVBS, Composite VideoBroadcast Signal) etc.
The present invention not only inserts decoding daughter board, master control daughter board and video and audio output display daughter board on the slot of backboard, is also inserted with local video and audio and gathers daughter board.Decoding daughter board, master control daughter board, video and audio output display daughter board and local video and audio gather daughter board, are all connected with exchange and control module; Decoding daughter board, master control daughter board, video and audio output display daughter board and local video and audio gather being realized by exchange and control module alternately between daughter board.
Further, the video/audio that this locality gathers also can be sent to other places by the present invention, particularly:
Described local video and audio gathers daughter board and also comprises video encoding module and the 3rd communication module;
Described master control daughter board, receives the local data output order from telecommunication customer end, sends to described exchange and control module, and described local data output order comprises source, the local channel mark and destination address chosen;
Described exchange and control module, receive the local data output order from described master control daughter board, local data output order sent to described local video and audio acquisition module;
Described local video and audio acquisition module, receives the local data output order from described exchange and control module, sends to described video encoding module; And the video/audio of collection is sent to described video encoding module;
Described video encoding module, receives the video/audio from described local video and audio acquisition module and local data output order, encodes to video/audio; By identifying corresponding video/audio with the local channel that local data output order comprises and send to described 3rd communication module after coding, and the destination address that local data output order comprises is sent to described 3rd communication module simultaneously;
Described 3rd communication module, receives the video/audio from described video encoding module and destination address, according to destination address, is sent by video/audio.
Further, multi-screen control device of the present invention also can store the video/audio that this locality gathers, and extracts for during needs:
This multi-screen control device also comprises local video and audio save module;
Described video encoding module, also sends to described local video and audio save module by the video/audio after coding;
Described local video and audio save module, for storing the video/audio from described video encoding module.
Local video and audio save module specifically can adopt the realization such as USB2.0, full digital code card (SD, Secure Digital MemoryCard).
Extract the local video/audio stored, can specifically adopt following scheme:
Described master control daughter board, receives the local cache data idsplay order from telecommunication customer end, sends to described exchange and control module, and described local cache data idsplay order comprises source, the local channel mark and display parameters chosen;
Described exchange and control module, receive the local cache data idsplay order from described master control daughter board, extract from described local video and audio save module and identify corresponding video/audio with the source, local channel that local cache data idsplay order comprises, send to described decoding daughter board; Receive the video/audio of described decoding daughter board feedback, send to described video and audio output display daughter board according to display parameters;
Described decoding daughter board, receives the video/audio from described exchange and control module, to video encoding decoding data, decoded video/audio is sent to described exchange and control module.
During the multi-screen control device of specific implementation Fig. 4, first communication module adopts cable interface to be connected with netting twine, information interaction is carried out by IP network and telecommunication customer end, this information interaction comprises the various instructions received from telecommunication customer end, as local idsplay order, outside idsplay order, local data output order, local cache data idsplay order etc.User opens the communication client software on PC, operates as required, to communicate with master control daughter board.Second communication module adopts cable interface to be connected with netting twine, obtains the video/audio from nonlocal multi-screen control device by IP network.3rd communication module adopts cable interface to be connected with netting twine, is sent by the video/audio that this locality gathers by IP network.
Numerous owing to needing to the input signal source of display wall, and the video wall number of screen of large-screen is less, therefore needs exchange and control module select certain input source whether to output to display wall and output to which display screen of display.Exchange and control module realize point-to-point exchange transmission, namely support that any road input source outputs to any one or more display screen.Exchange and control module can adopt expanding peripherals component interconnection standard (PCIE, PeripheralComponent Interconnect Express) 2.0 protocol realization such as grade.
The present invention expands multi-screen control device, and also can check by local multi-screen control device the video/audio that nonlocal multi-screen control device gathers, the video/audio realized between two or more multi-screen control device is shared; Thus, save human resources, optimize video monitoring, improve efficiency.
See Fig. 5, carry out the method indicative flowchart of the multi-screen control of video and audio multihead display for the present invention, it comprises the following steps:
Step 501, master control daughter board receives the outside idsplay order from telecommunication customer end, sends to exchange and control module, and outside idsplay order comprises the external data source mark and display parameters chosen.
Described external data source mark, can be specially the IP address sending video/audio; Display parameters specifically can comprise the parameter such as position, size that each nonlocal data source chosen shows on display wall.
Step 502, exchange and control module receive the outside idsplay order from master control daughter board, and the external data source mark in outside idsplay order is sent to decoding daughter board.
Step 503, decoding daughter board receives the video encoding data from other multi-screen control device by IP network, receive the external data source mark of self-exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to exchange and control module.
The second communication module in decoding daughter board, receives the video encoding data from other multi-screen control device according to ethernet communication agreement; Then by the video and audio decoder module in decoding daughter board, video encoding Data Data is decoded, convert incompressible high resolution video and audio data flow to.
Step 504, the video/audio of exchange and control module receipt decoding daughter board feedback, sends to video and audio output display daughter board according to display parameters.
Step 505, video/audio is sent to display wall and carries out multihead display by video and audio output display daughter board, and carries out audio frequency broadcasting.
Particularly, on the display screen of display wall, carry out image display by the video data in video/audio, meanwhile, carry out audio frequency broadcasting by the voice data in video/audio.
Further, the method also comprises:
Master control daughter board receives the local idsplay order from telecommunication customer end, sends to exchange and control module, and local idsplay order comprises the local channel mark and display parameters chosen;
Exchange and control module receive the local idsplay order from master control daughter board, and source, the local channel mark in local idsplay order is sent to the local video and audio acquisition module in local video and audio collection daughter board;
Local video and audio acquisition module gathers the video/audio from local channel, receives the local channel mark of self-exchange and control module, identifies corresponding video/audio and sends to by what gather and exchange and control module with local channel;
Exchange and control module receive the video/audio of local video and audio acquisition module feedback, send to video and audio output display daughter board according to display parameters;
Video/audio is sent to display wall and shows by video and audio output display daughter board.
Local video and audio acquisition module, realizes the on-the-spot high definition video collecting of local video recording, local audio collection, as required, the Voice & Video data after digitlization is sent to exchange and control module.
When carrying out output display, as required, can output display other places video/audio, also can the local video and audio of an output display, can also output display other places and local video/audio simultaneously.
Further, the video/audio that this locality gathers also can be sent to other places by the method:
Master control daughter board receives the local data output order from telecommunication customer end, sends to exchange and control module, and local data output order comprises source, the local channel mark and destination address chosen;
Exchange and control module receive the local data output order from master control daughter board, and local data output order is sent to local video and audio acquisition module;
Local video and audio acquisition module receives the local data output order of self-exchange and control module, sends to video encoding module; And the video/audio of collection is sent to the video encoding module in local video and audio collection daughter board;
Video encoding module receives from the video/audio of local video and audio acquisition module and local data output order, encodes to video/audio; By identifying corresponding video/audio with the local channel that local data output order comprises and send to the 3rd communication module after coding, and the destination address that local data output order comprises is sent to the 3rd communication module simultaneously;
3rd communication module receives from the video/audio of video encoding module and destination address, according to destination address, is sent by video/audio.
Video encoding module realizes the local digitlization HD video data of collection and the compressed encoding of voice data, greatly reduces the data volume of video and audio, is convenient to Internet Transmission.Concrete compression and coding standard as H.264, MPEG4 etc.
Further, the method also can store the video/audio that this locality gathers, and extracts for during needs:
After described video encoding module is encoded to video/audio, the video/audio after coding also sends to described local video and audio save module to store by video encoding module.
Extract the local video/audio stored, can specifically adopt with the following method:
Master control daughter board receives the local cache data idsplay order from telecommunication customer end, sends to exchange and control module, and described local cache data idsplay order comprises source, the local channel mark and display parameters chosen;
Exchange and control module receive the local cache data idsplay order from described master control daughter board, extract from described local video and audio save module and identify corresponding video/audio with the source, local channel that local cache data idsplay order comprises, send to described decoding daughter board;
Decoding daughter board receives the video/audio from described exchange and control module, to video encoding decoding data, decoded video/audio is sent to exchange and control module;
The video/audio of exchange and control module receipt decoding daughter board feedback, sends to video and audio output display daughter board according to display parameters;
Video/audio is sent to display wall and carries out multihead display by video and audio output display daughter board, and carries out audio frequency broadcasting.
Video and audio multihead display scheme provided by the invention, for any one video monitoring center, video conference place personnel can by the multi-screen control device at this video monitoring center, obtain high definition compressing video frequency flow and the audio stream in the meeting meeting-place at other video monitoring centers be in networking, and export video/audio by decoding daughter board, be shown on local video wall.Like this, the staff of local video Surveillance center, by local multi-screen control device, can know the video/audio that at least two other video control centres gather.Further, adopt the present invention program, gather daughter board by local video and audio, the real time record to local video/audio can be realized, then carry out storing or being sent the nonlocal video monitoring center needed by IP network.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. carry out a multi-screen control device for video and audio multihead display, it is characterized in that, this multi-screen control device comprises master control daughter board, exchange and control module, decoding daughter board and video and audio output display daughter board;
Described master control daughter board, receives the outside idsplay order from telecommunication customer end, sends to described exchange and control module, and described outside idsplay order comprises the external data source mark and display parameters chosen;
Described exchange and control module, receive the outside idsplay order from described master control daughter board, and the external data source mark in outside idsplay order is sent to described decoding daughter board; Receive the video/audio of described decoding daughter board feedback, send to described video and audio output display daughter board according to display parameters;
Described decoding daughter board, the video encoding data from other multi-screen control device are received by IP network, receive the external data source mark from described exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to described exchange and control module;
Described video and audio output display daughter board, receives the video/audio from described exchange and control module, is sent to display wall and carries out multihead display, and carry out audio frequency broadcasting.
2. multi-screen control device as claimed in claim 1, is characterized in that, this multi-screen control device also comprises local video and audio and gathers daughter board, and described local video and audio gathers daughter board and comprises local video and audio acquisition module;
Described master control daughter board, also receives the local idsplay order from telecommunication customer end, sends to described exchange and control module, and described local idsplay order comprises the local channel mark and display parameters chosen;
Described exchange and control module, receive the local idsplay order from described master control daughter board, sends to described local video and audio to gather daughter board source, the local channel mark in local idsplay order; Receive the video/audio of described local video and audio acquisition module feedback, send to described video and audio output display module according to display parameters;
Described local video and audio acquisition module, video/audio from local channel is gathered, receive the local channel mark from described exchange and control module, identify corresponding video/audio with local channel send to described exchange and control module by what gather.
3. multi-screen control device as claimed in claim 1 or 2, it is characterized in that, described master control daughter board comprises the first communication module and multi-screen controller central processing module, and described decoding daughter board comprises the second communication module and video and audio decoder module;
Described first communication module, receives the outside idsplay order from telecommunication customer end and local idsplay order, sends to described multi-screen controller central processing module;
Described multi-screen controller central processing module, receives the outside idsplay order from described first communication module and local idsplay order, sends to described exchange and control module;
Described second communication module, receives the video encoding data from other multi-screen control device by IP network, sends to described video and audio decoder module;
Described video and audio decoder module, receive the video encoding data from described second communication module, receive the external data source mark from described exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to described exchange and control module.
4. multi-screen control device as claimed in claim 2, is characterized in that, described local video and audio gathers daughter board and also comprises video encoding module and the 3rd communication module;
Described master control daughter board, receives the local data output order from telecommunication customer end, sends to described exchange and control module, and described local data output order comprises source, the local channel mark and destination address chosen;
Described exchange and control module, receive the local data output order from described master control daughter board, local data output order sent to described local video and audio acquisition module;
Described local video and audio acquisition module, receives the local data output order from described exchange and control module, sends to described video encoding module; And the video/audio of collection is sent to described video encoding module;
Described video encoding module, receives the video/audio from described local video and audio acquisition module and local data output order, encodes to video/audio; By identifying corresponding video/audio with the local channel that local data output order comprises and send to described 3rd communication module after coding, and the destination address that local data output order comprises is sent to described 3rd communication module simultaneously;
Described 3rd communication module, receives the video/audio from described video encoding module and destination address, according to destination address, is sent by video/audio.
5. multi-screen control device as claimed in claim 4, it is characterized in that, this multi-screen control device also comprises local video and audio save module;
Described video encoding module, also sends to described local video and audio save module by the video/audio after coding;
Described local video and audio save module, for storing the video/audio from described video encoding module.
6. multi-screen control device as claimed in claim 5, is characterized in that,
Described master control daughter board, receives the local cache data idsplay order from telecommunication customer end, sends to described exchange and control module, and described local cache data idsplay order comprises source, the local channel mark and display parameters chosen;
Described exchange and control module, receive the local cache data idsplay order from described master control daughter board, extract from described local video and audio save module and identify corresponding video/audio with the source, local channel that local cache data idsplay order comprises, send to described decoding daughter board; Receive the video/audio of described decoding daughter board feedback, send to described video and audio output display daughter board according to display parameters;
Described decoding daughter board, receives the video/audio from described exchange and control module, to video encoding decoding data, decoded video/audio is sent to described exchange and control module.
7. carry out a multi-screen control method for video and audio multihead display based on device according to claim 1, it is characterized in that, the method comprises:
Master control daughter board receives the outside idsplay order from telecommunication customer end, sends to exchange and control module, and outside idsplay order comprises the external data source mark and display parameters chosen;
Exchange and control module receive the outside idsplay order from master control daughter board, and the external data source mark in outside idsplay order is sent to decoding daughter board;
Decoding daughter board receives the video encoding data from other multi-screen control device by IP network, receive the external data source mark of self-exchange and control module, identify corresponding video encoding decoding data to what receive with external data source, decoded video/audio is sent to exchange and control module;
The video/audio of exchange and control module receipt decoding daughter board feedback, sends to video and audio output display daughter board according to display parameters;
Video/audio is sent to display wall and carries out multihead display by video and audio output display daughter board, and carries out audio frequency broadcasting.
8. method as claimed in claim 7, it is characterized in that, the method also comprises:
Master control daughter board receives the local idsplay order from telecommunication customer end, sends to exchange and control module, and local idsplay order comprises the local channel mark and display parameters chosen;
Exchange and control module receive the local idsplay order from master control daughter board, send to local video and audio to gather the local video and audio acquisition module of daughter board source, the local channel mark in local idsplay order;
Local video and audio acquisition module gathers the video/audio from local channel, receives the local channel mark of self-exchange and control module, identifies corresponding video/audio and sends to by what gather and exchange and control module with local channel;
Exchange and control module receive the video/audio of local video and audio acquisition module feedback, send to video and audio output display daughter board according to display parameters;
Video/audio is sent to display wall and shows by video and audio output display daughter board.
9. method as claimed in claim 8, it is characterized in that, the method comprises:
Master control daughter board receives the local data output order from telecommunication customer end, sends to exchange and control module, and local data output order comprises source, the local channel mark and destination address chosen;
Exchange and control module receive the local data output order from master control daughter board, and local data output order is sent to local video and audio acquisition module;
Local video and audio acquisition module receives the local data output order of self-exchange and control module, sends to video encoding module; And the video/audio of collection is sent to the video encoding module in local video and audio collection daughter board;
Video encoding module receives from the video/audio of local video and audio acquisition module and local data output order, encodes to video/audio; By identifying corresponding video/audio with the local channel that local data output order comprises and send to the 3rd communication module after coding, and the destination address that local data output order comprises is sent to the 3rd communication module simultaneously;
3rd communication module receives from the video/audio of video encoding module and destination address, according to destination address, is sent by video/audio.
10. method as claimed in claim 9, it is characterized in that, after described video encoding module is encoded to video/audio, the method also comprises:
Video/audio after coding also sends to described local video and audio save module to store by video encoding module.
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