CN101938626B - Video session terminal, system, and method - Google Patents
Video session terminal, system, and method Download PDFInfo
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Abstract
The invention provides a video session terminal, a video session system and a video session method. The video session terminal is characterized by comprising a central control module, and an audio/video input module, an audio/video output module, a multi-channel audio/video coding/decoding server, a parameter configuration module and a network interface module which are connected with the central control module respectively, wherein the central control module is used for controlling the operation of each module connected with the central control module. The multi-channel audio/video coding/decoding server of the video session terminal can code a multi-channel audio/video signal and decode a multi-channel audio/video code stream. The multi-channel audio/video coding/decoding server can process the multi-channel audio/video signal, so the video session terminal can realize a one-to-many video session. The video session terminal is provided with the central control module, so the video session terminal can directly interact with other video session terminals through a network and can directly acquire audio/video code stream of the conventional monitoring equipment through the network.
Description
Technical field
The present invention relates to the video conferencing technology field, particularly a kind of video conference terminal, system and method.
Background technology
Video conference is a kind of two-way, the multiple spot that is not subjected to regional limits on the basis, broadband, Video Applications system of real-time interactive of being based upon.Video conference claims again video conferencing, video conference etc., and it can be implemented in the information that and multi-point transmit the forms such as live image, voice and application data (electronic whiteboard, figure) in real time at 2.Application number a kind of video conferencing system that has been 200820025588.6 Patent Application Publication in the prior art is below in conjunction with the simple composition and working principle of introducing lower this video conferencing system of accompanying drawing.
Referring to Fig. 1, this figure is the terminal schematic diagram of video conferencing system in the prior art.
Can comprise a plurality of terminals in the video conferencing system, Fig. 1 only shows one of them terminal.
The terminal of this video conferencing system comprises digital audio/video encoding and decoding plate 6, center-control processing main plate 7, audio output apparatus 13 and picture output device 23.
Send into respectively audio-frequency module 12 and video module 22 in the audio/video encoding/decoding plate 6 from the audio signal 11 of audio frequency apparatus (such as microphone) with from the vision signal 21 of video equipment (such as video camera), audio-frequency module 12 and video module 22 carry out audio signal 11 and vision signal 22 respectively digital encoding and decoding process after, the digital encoding and decoding that will process by PCI slot 5 are sent to center-control processing main plate 7.Center-control processing main plate 7 is transferred to network so that arrive another remote equipment by network interface 3 with the digital editing code of processing.
The request of remote equipment is transported to center-control processing main plate 7 by control interface 4.The digital audio/video code stream of remote equipment enters center-control processing main plate 7 by network interface 3 and carries out the encoding and decoding processing.Center-control processing main plate 7 logarithm word tone video code flows carry out digital encoding and decoding is sent to stereo set (such as power amplifier) and display device (such as television set etc.) by audio frequency output 13 and video output 23 after processing.
In sum, this video conference terminal can be realized double-current digital audio/video meeting.
This video conference terminal comprises digital audio/video encoding and decoding plate and center-control processing main plate, but digital audio/video encoding and decoding plate can only be realized one tunnel point-to-point audio/video decoding and encoding function, can not realize audio/video decoding and encoding function between the multiple spot.And the audio-video code stream of can not the preview existing watch-dog of existing video conference terminal (for example DVS, DVR, web camera etc.).
Summary of the invention
The technical problem to be solved in the present invention provides a kind of video conference terminal, system and method, can realize the multichannel audio-video frequency coding and decoding function, and the direct audio-video code stream of the existing watch-dog of preview.
The invention provides a kind of video conference terminal, comprise: central control module also comprises the audio frequency and video input module, audio frequency and video output module, multichannel audio-video frequency encoding and decoding server, parameter configuration module and the Network Interface Module that are connected respectively with described central control module;
Described parameter configuration module is used for each described module is carried out parameter configuration, also is used for obtaining the parameter of other video conference terminals, sends the audio-video code stream request to other video conference terminals;
Described multichannel audio-video frequency encoding and decoding server be used for the multichannel audio-video frequency signal that the audio frequency and video input module transmits is carried out the digital audio/video coding, and the multichannel audio-video frequency code stream that is used for Network Interface Module is transmitted carries out audio/video decoding;
Described audio frequency and video output module is used for decoded multichannel audio-video frequency code stream is carried out preview;
Described central control module is used for controlling audio frequency and video input module, audio frequency and video output module, multichannel audio-video frequency encoding and decoding server, parameter configuration module and the Network Interface Module work that is connected respectively with described central control module.
Preferably, described multichannel audio-video frequency encoding and decoding server, audio, video data after also being used for encoding is packaged as the form of media real-time Transmission, and the audio, video data after central control module will be packed sends to the equipment of request audio-video code stream by Network Interface Module.
Preferably, described audio frequency and video output module comprises:
Cut apart display sub-module, be used for whole display frame is divided into a plurality of zones, the audio-video code stream in each output a-road-through road, zone is carried out preview;
Timesharing repeating query display sub-module is used for setting at least one zone in display frame, carries out preview in described zone according to passage timesharing repeating query output audio-video code stream.
Preferably, also comprise picture recording module and the memory module that is connected with central control module respectively;
Described picture recording module comprises: send submodule, search for submodule and obtain submodule;
Described transmission submodule is used for the audio-video code stream that will record and is sent to memory module with the form of file and stores;
Described search submodule is used for the audio-video code stream of described memory module storage is searched for;
The described submodule that obtains is used for obtaining audio-video code stream from described memory module and is sent to described multichannel audio-video frequency encoding and decoding server and decodes.
Preferably, also comprise the control inputs module that is connected with described central control module, be used for realization to the control of audio frequency and video output module.
The present invention also provides a kind of video conferencing system, comprises described video conference terminal, and described video conference terminal is at least two, also comprises: at least a in pc client, web camera, the analog video camera;
Carry out the mutual of audio, video data between the described video conference terminal; Or,
Carry out the mutual of audio, video data between described video conference terminal and the pc client; Or,
Described video conference terminal obtains audio-video code stream from described web camera; Or,
Described video conference terminal obtains audio-video code stream by DVR or DVS from described analog video camera.
The present invention also provides a kind of method of utilizing described video conferencing system to carry out video conference, may further comprise the steps:
Receive the audio-video signal of self audio frequency and video input module input;
The audio-video signal that receives is encoded to predetermined digital audio/video coded format;
Digital audio/video code stream behind the coding is sent to the equipment of request audio-video code stream by Network Interface Module.
Preferably, further comprising the steps of:
Receive the multichannel audio-video frequency code stream that Network Interface Module transmits; Described multichannel audio-video frequency code stream sends to Network Interface Module by requested equipment;
Described multichannel audio-video frequency code stream is decoded;
Decoded multichannel audio-video frequency code stream is sent to the audio frequency and video output module export preview.
The present invention also provides a kind of method of utilizing described video conferencing system to carry out video conference, may further comprise the steps:
Receive the multichannel audio-video frequency code stream that Network Interface Module transmits; Described multichannel audio-video frequency code stream sends to Network Interface Module by requested equipment;
Described multichannel audio-video frequency code stream is decoded;
Decoded multichannel audio-video frequency code stream is sent to the audio frequency and video output module export preview.
Preferably, further comprising the steps of:
Receive the audio-video signal of self audio frequency and video input module input;
The audio-video signal that receives is encoded to predetermined digital audio/video coded format;
Digital audio/video code stream behind the coding is sent to the equipment of request audio-video code stream by Network Interface Module.
Compared with prior art, the present invention has the following advantages:
Video conference terminal provided by the invention comprises: central control module also comprises the audio frequency and video input module, audio frequency and video output module, multichannel audio-video frequency encoding and decoding server, parameter configuration module and the Network Interface Module that are connected with described central control module; Wherein, parameter configuration module is used for each described module is carried out parameter configuration, also is used for obtaining the parameter of other video conference terminals, sends the audio-video code stream request to other video conference terminals; Multichannel audio-video frequency encoding and decoding server is used for the multichannel audio-video frequency signal that the audio frequency and video input module transmits is carried out the digital audio/video coding, and the multichannel audio-video frequency code stream that is used for Network Interface Module is transmitted carries out audio/video decoding; The audio frequency and video output module is used for decoded multichannel audio-video frequency code stream is carried out preview; Described central control module is used for each described module work of control.The multichannel audio-video frequency encoding and decoding server of this video conference terminal both can have been realized the multichannel audio-video frequency signal is encoded, and can decode to the multichannel audio-video frequency code stream again.Because multichannel audio-video frequency encoding and decoding server can be realized the processing to the multichannel audio-video frequency data, so this video conference terminal can be realized the video conference of a pair of multiple spot.And this video conference terminal self has central control module, can realize and the direct interaction of other video conference terminals by network, also can obtain the audio-video code stream that enchashment has watch-dog by direct network.
Description of drawings
Fig. 1 is the terminal schematic diagram of video conferencing system in the prior art;
Fig. 2 is embodiment one structure chart of video conference terminal provided by the invention;
Fig. 3 is another example structure figure of video conference terminal provided by the invention;
Fig. 4 is video conferencing system example structure figure provided by the invention;
Fig. 5 is multichannel audio-video frequency encoding and decoding server code flow chart provided by the invention;
Fig. 6 is multichannel audio-video frequency encoding and decoding server decoding process figure provided by the invention;
Fig. 7 is the workflow diagram of video conferencing system provided by the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Referring to Fig. 2, this figure is video conference terminal embodiment one structure chart provided by the invention.
Video conference terminal provided by the invention, comprise: central control module 201 also comprises the audio frequency and video input module 202, audio frequency and video output module 203, multichannel audio-video frequency encoding and decoding server 204, parameter configuration module 205 and the Network Interface Module 206 that are connected with described central control module 201;
Described parameter configuration module 205 is used for each described module is carried out parameter configuration, also is used for obtaining the parameter of other video conference terminals, sends the audio-video code stream request to other video conference terminals;
The parameter that parameter configuration module 205 is obtained other video conference terminals is mainly: IP address, port numbers, username and password etc.For example, comprise two video conference terminals in the video conferencing system, first video conference terminal and the second video conference terminal are known the other side's parameter mutually, and the first video conference terminal can send the request of obtaining audio-video code stream by the IP address of second video conference terminal to second video conference terminal.
Described multichannel audio-video frequency encoding and decoding server 204 is used for the multichannel audio-video frequency signal that audio frequency and video input module 202 transmits is carried out the digital audio/video coding;
Described audio frequency and video input module 202 is at least a in camera and the microphone.
Wherein the form of coding is mainly the form of present main flow, such as video can be encoded to H.264, MPEG2, MPEG4 etc.; Audio frequency can be encoded to MPEG1 Layer-1, MPEG1 Layer-2, MPEG1 Layer-3, G711, Ogg Vorbis etc.
Wherein audio/video coding form, code stream type, frame type, I frame period, resolution, video frame rate, the bit rate upper limit, picture quality, bit rate type, audio coding form and audio sample rate can arrange by described parameter configuration module 205 according to different practical application and network environment.
The multichannel audio-video frequency code stream that described multichannel audio-video frequency encoding and decoding server 204 also is used for Network Interface Module 206 is transmitted carries out audio/video decoding;
Described audio frequency and video output module 203 is used for decoded multichannel audio-video frequency code stream is carried out preview;
Described audio frequency and video output module 203 can be in display, display screen, earphone and the sound equipment at least a.
Described central control module 201 is used for each described module work of control.
The multichannel audio-video frequency encoding and decoding server 204 of this video conference terminal both can have been realized the multichannel audio-video frequency signal is encoded, and can decode to the multichannel audio-video frequency code stream again.Because multichannel audio-video frequency encoding and decoding server 204 can be realized simultaneously the processing to the multichannel audio-video frequency data, so this video conference terminal can be realized the video conference of a pair of multiple spot.And this video conference terminal self has central control module, can realize and the direct interaction of other video conference terminals by network, also can obtain the audio-video code stream that enchashment has watch-dog by direct network.
Referring to Fig. 3, this figure is another example structure of video conference terminal provided by the invention figure.
The difference that the video conference terminal that present embodiment provides and Fig. 2 provide is to have increased picture recording module 301, memory module 302 and control inputs module 303.
Also comprise the picture recording module 301 and the memory module 302 that are connected with central control module 201;
Described picture recording module 301 comprises: send submodule, search for submodule and obtain submodule;
Described transmission submodule is used for the audio-video code stream that will record and is sent to memory module 302 with the form of file and stores;
Described search submodule is used for the audio-video code stream of described memory module 302 storages is searched for;
The described submodule that obtains is used for obtaining audio-video code stream from described memory module 302 and is sent to described multichannel audio-video frequency encoding and decoding server 204 and decodes.
Described memory module 302 is at least a in hard disk, CD, USB flash disk, memory stick, SD card and the network storage.
The video conference terminal that present embodiment provides also comprises the control inputs module 303 that is connected with described central control module 201, is used for realization to the control of audio frequency and video output module 203.
Described control inputs module 303 is at least a in mouse, keyboard, control panel and the remote controller.
For example: control inputs module 303 control audio frequency and video output modules 203 output picture numbers, comprise single-image output, picture-in-picture output, the output of many pictures, open or close a picture audio frequency or video, open or close the audio frequency and video output of a picture etc.
When picture-in-picture is exported, small one and large one picture.When many picture output, select a picture full screen display, or the reduction initial condition etc.
Need to prove, audio, video data after the audio/video encoding/decoding server 204 that present embodiment provides also is used for encoding is packaged as the form of media real-time Transmission, and the audio, video data after central control module 201 will be packed sends to the equipment of request audio-video code stream by Network Interface Module 206.This equipment can be other video conference terminal, also can be pc client.Audio, video data form after the packing mainly is the media real-time Transmission form of present main flow, such as rtp streaming or PS stream etc.
Described audio frequency and video output module 203 is used for decoded multichannel audio-video frequency code stream is carried out preview, specifically comprises:
Cut apart display sub-module, be used for whole display frame is divided into a plurality of zones, the audio-video code stream in each output a-road-through road, zone is carried out preview;
Timesharing repeating query display sub-module is used for setting at least one zone in display frame, carries out preview in described zone according to passage timesharing repeating query output audio-video code stream.
Cut apart display sub-module whole display frame is divided into a plurality of zones, the audio-video code stream of a passage of each zone output, for example, this video conference terminal carries out information interaction with four other video conference terminals simultaneously, then the audio frequency and video output module 203 of this video conference terminal is divided into up and down four zones with whole display frame, therefore a passage in corresponding four video conference terminals in each zone can see respectively the audio-video code stream from four video conference terminals so simultaneously.Be understandable that present embodiment does not specifically limit display frame specifically is divided into several zones, specifically can determine according to the video conference terminal number that reality is participated in video conference.
Another kind of display mode is that timesharing repeating query display sub-module is set at least one zone and exported audio-video code stream according to passage timesharing repeating query and carry out preview in display frame.For example set a zone or two zones all can, suppose the zone, the upper left corner of set and display picture as the audio frequency and video output area, can show audio-video code stream from different passages in this regional timesharing repeating query.
The time interval that the timesharing repeating query for example can be set is 5 seconds, have four passages and transmit audio-video code stream, at this moment, can be set in first 5 second time period, the zone, the upper left corner of audio frequency and video output module shows the audio-video code stream that first passage transmits, in second 5 second time period, the zone, the upper left corner of audio frequency and video output module shows the audio-video code stream that second channel transmits, in the 3rd 5 second time period, the zone, the upper left corner of audio frequency and video output module shows the audio-video code stream that third channel transmits, in the 4th 5 second time period, zone, the upper left corner of audio frequency and video output module shows the audio-video code stream that four-way transmits.First repeating query show complete after, according to this rule with this reciprocation cycle.Be understandable that, the embodiment of the invention does not specifically limit the number in the zone of setting, when for example passage is too many, can be divided into a plurality of zones comes repeating query to show, first regional repeating query shows the audio-video code stream of first to the 4th passage, second regional repeating query shows the audio-video code stream of the 5th to the 8th passage, by that analogy.Certainly specifically do not limit the time interval that repeating query shows yet.
Need to prove, the audio frequency and video output module only is used for showing audio-video code stream, but the content of the audio-video code stream that shows is sent by multichannel audio-video frequency encoding and decoding server, therefore, multichannel audio-video frequency encoding and decoding server is corresponding to send the current content that shows of needing of audio frequency and video output module, i.e. multichannel audio-video frequency encoding and decoding server is corresponding to have the function that timesharing is decoded according to passage.
Referring to Fig. 4, this figure is the video conferencing system that the embodiment of the invention provides.
The present invention also provides a kind of video conferencing system, comprise at least two described video conference terminals, present embodiment is introduced take two as example, be respectively the first video conference terminal 401 and the second video conference terminal 402, also comprise: at least a in pc client 403, web camera 404 and the analog video camera 406;
Carry out the mutual of audio, video data between the described video conference terminal; For example, carry out the mutual of audio, video data by network between the first video conference terminal 401 and the second video conference terminal 402.
Or,
Carry out the mutual of audio, video data between described video conference terminal and the pc client; For example, the first video conference terminal 401 carries out the mutual of audio, video data by network and pc client 403.
Or,
Described video conference terminal obtains audio-video code stream from described web camera; For example, the first video conference terminal 401 obtains the video of monitoring from web camera 404.
Or,
Described video conference terminal obtains audio-video code stream by described DVR or DVS405 from described analog video camera 406.
Video conference terminal in the video conferencing system that the embodiment of the invention provides can carry out information interaction with a plurality of video conference terminals simultaneously, also can carry out alternately with a plurality of pc clients, can also obtain the video of monitoring from watch-dog (for example web camera).
The embodiment of the invention also provides a kind of method of utilizing above-described video conferencing system to carry out video conference, describes the flow process of the video conference that the embodiment of the invention provides in detail below in conjunction with flow chart.
Referring to Fig. 5, this figure is the multichannel audio-video frequency encoding and decoding server code flow chart that the embodiment of the invention provides.
Video conference terminal with the main step of equipment that the audio-video signal of this locality sends the request audio-video code stream to is:
Receive the audio-video signal of self audio frequency and video input module input;
The audio-video signal that receives is encoded to predetermined digital audio/video coded format;
Digital audio/video code stream behind the coding is sent to the equipment of request audio-video code stream by Network Interface Module.
Can realize by following steps particularly:
S501: receive the audio-video signal that the audio frequency and video input module sends;
S502: the audio-video signal that receives is encoded to predetermined digital audio/video coded format; Need to prove that predetermined digital audio/video coded format is the digital audio/video coded format of present main flow, concrete form present embodiment is not done restriction.
S503: the digital audio/video code stream after will encoding is packaged into the form of media real-time Transmission; The form of media real-time Transmission can be packed according to present popular technology, and present embodiment is not specifically limited.
S504: the digital audio/video code stream after will packing sends to the equipment of request audio-video code stream by Network Interface Module.The equipment of request audio-video code stream can for another one or other several video conference terminal, also can be pc client.
Referring to Fig. 6, this figure is the multichannel audio-video frequency encoding and decoding server decoding process figure that the embodiment of the invention provides.
Video conference terminal to the key step of other device request audio-video code stream is:
Receive the multichannel audio-video frequency code stream that Network Interface Module transmits; Described multichannel audio-video frequency code stream sends to Network Interface Module by requested equipment;
Described multichannel audio-video frequency code stream is decoded;
Decoded multichannel audio-video frequency code stream is sent to the audio frequency and video output module export preview.
Specifically can realize by following steps:
S601: the audio-video code stream that the multichannel that the reception Network Interface Module sends has been packed; Audio-video code stream that Network Interface Module sends can send for other video conference terminals, also can send for pc client, also can send for watch-dog (web camera).
S602: the audio-video code stream that the multichannel that receives has been packed is unpacked, obtain the audio-video code stream of present main flow audio/video coding form;
S603: the audio-video code stream of the present main flow audio/video coding form that will obtain is decoded;
S604: decoded multichannel audio-video frequency code stream is sent to the audio frequency and video output module export preview; Comprise the subregion demonstration that is fit to the demonstration of audio frequency and video output module or the form that shows according to passage timesharing repeating query of sending in this step.
The multichannel audio-video frequency encoding and decoding server of each video conference terminal need to prove that the step of Fig. 5 and Fig. 6 can be carried out simultaneously on each video conference terminal, because can be processed the multichannel audio-video frequency signal simultaneously.
Introduce the workflow of video conferencing system provided by the invention below in conjunction with Fig. 7.
Referring to Fig. 7, this figure is the workflow diagram of video conferencing system provided by the invention.
S701: the video conference terminal start in the conference member of all video conferences;
S702: the video conference terminal of all conference members obtains the interface parameters of other video conference terminals by the parameter configuration module of self, comprises IP address, port numbers, username and password, also disposes the parameter of the modules of self;
S703: the video conference terminal of all conference members passes through the parameter configuration module of self to other video conference terminal request audio-video code stream;
S704: requested video conference terminal sends to requested audio-video code stream by Network Interface Module the video conference terminal of request.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (9)
1. video conference terminal, it is characterized in that, described video conference terminal is used for realizing the video conference of a pair of multiple spot, comprise: central control module also comprises audio frequency and video input module, audio frequency and video output module, multichannel audio-video frequency encoding and decoding server, parameter configuration module and the Network Interface Module, the control inputs module that are connected respectively with described central control module;
Described parameter configuration module is used for each described module is carried out parameter configuration, also is used for obtaining the parameter of other video conference terminals, the audio-video code stream request that sends audio-video code stream requests and receive other video conference terminals to other video conference terminals; Wherein, know mutually the other side's parameter between described video conference terminal and other video conference terminals;
Described multichannel audio-video frequency encoding and decoding server be used for the multichannel audio-video frequency signal that the audio frequency and video input module transmits is carried out the digital audio/video coding, and the multichannel audio-video frequency code stream that is used for Network Interface Module is transmitted carries out audio/video decoding;
Described audio frequency and video output module is used for decoded multichannel audio-video frequency code stream is carried out preview;
Described control inputs module is used for realization to the control of described audio frequency and video output module, with control audio frequency and video output module output picture number, comprise that specifically the described audio frequency and video output module of control carries out single-image output, picture-in-picture output, the output of many pictures, opens or cut out audio or video and the unlatching of a picture or cuts out the audio frequency and video output of a picture;
Described central control module is used for controlling audio frequency and video input module, audio frequency and video output module, multichannel audio-video frequency encoding and decoding server, parameter configuration module and the Network Interface Module work that is connected respectively with described central control module; Described central control module also be used for by carry out between described Network Interface Module and a plurality of video conference terminal or a plurality of pc client audio, video data alternately, and the audio-video code stream of directly obtaining a plurality of watch-dogs by described Network Interface Module.
2. video conference terminal according to claim 1, it is characterized in that, described multichannel audio-video frequency encoding and decoding server, audio, video data after also being used for encoding is packaged as the form of media real-time Transmission, and the audio, video data after central control module will be packed sends to the equipment of request audio-video code stream by Network Interface Module.
3. video conference terminal according to claim 1 is characterized in that, described audio frequency and video output module comprises:
Cut apart display sub-module, be used for whole display frame is divided into a plurality of zones, the audio-video code stream in each output a-road-through road, zone is carried out preview;
Timesharing repeating query display sub-module is used for setting at least one zone in display frame, carries out preview in described zone according to passage timesharing repeating query output audio-video code stream.
4. video conference terminal according to claim 1 is characterized in that, also comprises the picture recording module and the memory module that are connected with central control module respectively;
Described picture recording module comprises: send submodule, search for submodule and obtain submodule;
Described transmission submodule is used for the audio-video code stream that will record and is sent to memory module with the form of file and stores;
Described search submodule is used for the audio-video code stream of described memory module storage is searched for;
The described submodule that obtains is used for obtaining audio-video code stream from described memory module and is sent to described multichannel audio-video frequency encoding and decoding server and decodes.
5. video conference terminal according to claim 1 is characterized in that, also comprises the control inputs module that is connected with described central control module, is used for realization to the control of audio frequency and video output module.
6. video conferencing system, it is characterized in that, comprise each described video conference terminal of claim 1-5, described video conference terminal is used for realizing the video conference of a pair of multiple spot, described video conference terminal is at least two, wherein, know mutually the other side's parameter between described video conference terminal and other video conference terminals; Also comprise: at least a in pc client, web camera, the analog video camera, described video conference terminal is by at least a connection the in network and described pc client, web camera, the analog video camera;
Carry out the mutual of audio, video data between the described video conference terminal; Or,
Carry out the mutual of audio, video data between described video conference terminal and the pc client; Or,
Described video conference terminal directly obtains audio-video code stream from described web camera; Or,
Described video conference terminal obtains audio-video code stream by DVR or DVS from described analog video camera.
7. the method that the video conferencing system of utilizing claim 6 is carried out video conference is characterized in that, may further comprise the steps:
Receive the audio-video signal of self audio frequency and video input module input;
The audio-video signal that receives is encoded to predetermined digital audio/video coded format;
Digital audio/video code stream behind the coding is sent to the equipment of request audio-video code stream by Network Interface Module.
8. method according to claim 7 is characterized in that, and is further comprising the steps of:
Receive the multichannel audio-video frequency code stream that Network Interface Module transmits; Described multichannel audio-video frequency code stream sends to Network Interface Module by requested equipment;
Described multichannel audio-video frequency code stream is decoded;
Decoded multichannel audio-video frequency code stream is sent to the audio frequency and video output module export preview.
9. the method that the video conferencing system of utilizing claim 6 is carried out video conference is characterized in that, may further comprise the steps:
Receive the multichannel audio-video frequency code stream that Network Interface Module transmits; Described multichannel audio-video frequency code stream sends to Network Interface Module by requested equipment;
Described multichannel audio-video frequency code stream is decoded;
Decoded multichannel audio-video frequency code stream is sent to the audio frequency and video output module export preview.
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| CN102123139A (en) * | 2011-01-11 | 2011-07-13 | 上海交通大学 | Portable multifunctional multimedia terminal system |
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