CN101437140A - Multi-picture transmission method and multi-point control unit - Google Patents
Multi-picture transmission method and multi-point control unit Download PDFInfo
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- CN101437140A CN101437140A CNA2008102397867A CN200810239786A CN101437140A CN 101437140 A CN101437140 A CN 101437140A CN A2008102397867 A CNA2008102397867 A CN A2008102397867A CN 200810239786 A CN200810239786 A CN 200810239786A CN 101437140 A CN101437140 A CN 101437140A
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Abstract
The invention discloses a multi-screen transmission method, which comprises the following steps: a multi-point control unit (MCU) receives video streams sent by more than two source terminals by a mainstream channel; and the MCU combines the received more than two video streams into two paths of video streams and then sends the video streams to a target terminal through the main stream channel and an auxiliary channel respectively, so that the target terminal can display video from the main stream channel on main display equipment, and display video from the auxiliary channel on the auxiliary display equipment. The invention also discloses an MCU. The technical proposal of the invention greatly reduces processing burden of the MCU and the terminal.
Description
Technical field
The present invention relates to the video conferencing technology field, particularly a kind of many picture transmission methods and a kind of multipoint control unit.
Background technology
Video conferencing system is to support the multimedia communications system of sound, video and data communication.General video conferencing system comprises multipoint control unit (MCU, Multipoint Control Unit), terminal and some other is as telephone access gateway equipment such as (PSTN Gateway).Various terminal all is connected into MCU and concentrates exchange, forms a video conference network.
MCU is an end points in the video conference network, is three or more terminals and multipoint conference service of gateway participation.MCU also can directly connect two terminals and constitute point-to-point meeting, expands to multipoint conference subsequently again.Support that the video conference terminal of standard H.323 also is an end points in the video conference network for one, can with other H.323 terminal, gateway or MCU carry out real-time two-way communication, Content of Communication comprises control, indication, audio frequency, motion color video frequency image and/or data.Terminal can only provide speech, speech and data, speech and video or voice data and video.
At present, general video conferencing system is all supported double fluid, i.e. main flow and auxilliary stream.Wherein, main flow is the first via video flowing in the video conferencing system, is mainly used in the transmission broadcast picture; Auxilliary stream is the second road video flowing in the video conferencing system, is mainly used in auxiliary material such as film on transmission assistant images or the computer, document.For example, spokesman's audio-video signal is transferred to by mainstream channel on the basic display unit of each user terminal and shows in a video conference, and the picture signal of the PPT document that the spokesman makes a speech used is transferred to by auxilliary circulation road on the auxilliary display of each user terminal and shows.
In multipoint videoconference, many picture functions allow the user to watch the video of a plurality of call terminals simultaneously, help to improve communication effect, are very welcome.But, the surface function that changes in the existing video conference is more, send to receiving terminal after will being spliced into one road video flowing (being main flow) from the image of a plurality of terminals by MCU, receiving terminal can only be presented on the display device, the viewing area of distributing to each sprite like this is less, clear inadequately, influence user's satisfaction.
For this reason, there is a kind of method of multi-screen and multi-picture to solve this problem in the prior art, this method is specially: when receiving terminal comprises n platform display, set up a two-way voice-grade channel, two-way video channel and n-1 MCU one-way video passage to terminal between MCU and the terminal; MCU synthesizes a plurality of outputting video streams with the input video stream of a plurality of terminals and exports to terminal, and wherein each outputting video streams contains one or more sprites, and each sprite is the image of one road input video stream; A plurality of video flowings that terminal will be received are presented on the different displays.
But, in said method, except setting up a two way audio passage, a two-way video passage, needs also need to set up the one-way video passage of a plurality of MCU between MCU and the terminal to terminal, additionally increased the processing burden of MCU and terminal.
Summary of the invention
The invention provides a kind of many picture transmission methods, this method has alleviated the processing burden of MCU and terminal.
The present invention also provides a kind of MCU, and this MCU can alleviate the processing burden of self and terminal.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The invention discloses a kind of many picture transmission methods, this method comprises:
Multipoint control unit MCU receives the video flowing that plural source terminal sends by mainstream channel;
MCU is merged into two-path video stream with the plural video flowing of described reception; Wherein, the two-path video stream after the described merging is single-image or many image modes, and each picture is corresponding to the video of a source terminal;
The two-path video flow point of MCU after with described merging do not send to the purpose terminal by mainstream channel and auxilliary circulation road, makes the purpose terminal can show the video from mainstream channel on main display device, shows the video from auxilliary circulation road on auxilliary display device.
The invention also discloses a kind of multipoint control unit MCU, this MCU comprises: receiver module, merging module and sending module, wherein,
Receiver module is used to receive the video flowing that plural source terminal sends by mainstream channel, and is transmitted to the merging module;
Merge module, send to sending module after being used for described plural video flowing is merged into two-path video stream; Wherein, the two-path video stream after the described merging is single-image or many image modes, and each picture is corresponding to the video of a source terminal;
Sending module, be used for the two-path video flow point after the described merging is not sent to the purpose terminal by mainstream channel and auxilliary circulation road, make the purpose terminal can on main display device, show video, on auxilliary display device, show video from auxilliary circulation road from mainstream channel.
As seen from the above technical solution, this multipoint control unit MCU of the present invention receives the video flowing that plural source terminal sends by mainstream channel; MCU sends to the purpose terminal by mainstream channel and auxilliary circulation road respectively after the plural video flowing of described reception is merged into two-path video stream, make the purpose terminal can on main display device, show video from mainstream channel, on auxilliary display device, show technical scheme from the video of auxilliary circulation road, make when realizing multi-screen and multi-picture, having utilized existing auxilliary circulation road to carry out many pictures shares, and need not between MCU and terminal, to set up again extra passage, alleviated the processing burden of MCU and terminal greatly.
Description of drawings
Fig. 1 is the flow chart of a kind of many picture transmission methods of the embodiment of the invention;
Fig. 2 is the networking schematic diagram of video conferencing system in the embodiment of the invention;
Fig. 3 is the networking schematic diagram of the another video conferencing system in the embodiment of the invention;
Fig. 4 is the composition structured flowchart of a kind of multipoint control unit MCU of the embodiment of the invention.
Embodiment
Fig. 1 is the flow chart of a kind of many picture transmission methods of the embodiment of the invention.As shown in Figure 1, this method may further comprise the steps:
In the such scheme, when realizing multi-screen and multi-picture, utilize existing auxilliary circulation road to carry out many pictures and shared, and need not between MCU and terminal, to set up again extra passage, alleviated the processing burden of MCU and terminal greatly.
For making technical scheme of the present invention clearer, below exemplify embodiment the present invention is further described in detail.
Fig. 2 is the networking schematic diagram of video conferencing system in the embodiment of the invention.As shown in Figure 2, this video conferencing system comprises MCU and terminal 1～6.Certainly this system can also comprise other equipment, as gateway etc., and may be to communicate by IP network between terminal and the MCU, and these do not illustrate in Fig. 2, but influence explanation technical scheme of the present invention also.
In Fig. 2, establishing terminal 6 is purpose terminals, terminal 1～4th, and source terminal, terminal 5 is auxilliary stream source terminals.Certainly terminal 1～4th also can be the purpose terminal of receiver, video stream in the time of source terminal, but only establishing terminal 6 for simplicity in the present embodiment is purpose terminals, and terminal 6 has two displays, one is the basic display unit that is used to show the video flowing that receives from mainstream channel, and another is the auxilliary display that is used to show the video flowing that receives from auxilliary circulation road.Referring to Fig. 2, the process of the many pictures of realization multi-screen in the present embodiment may further comprise the steps:
Step 201, MCU sends flow-control information to terminal 1～4, requires terminal 1～4 to send video flowing to MCU;
Step 202 after terminal 1～4 is received flow-control information, sends video flowing by mainstream channel to MCU, represents with solid arrow in Fig. 2;
Step 203, MCU sends to all purpose terminals by mainstream channel and auxilliary circulation road respectively after the video flowing of terminal 1～4 is merged into two-path video stream, here be to send to purpose terminal 6, be specially: MCU sends to terminal 6 with the image of the terminal 1 at spokesman place by mainstream channel, represent with solid arrow among Fig. 2, with the picture decoding of terminal 2,3 and 4, and send to terminal 6 by auxilliary circulation road after being connected into 3 pictures, coding, the with dashed lines arrow is represented among Fig. 2;
Step 204, the video of the terminal 1 that terminal 6 will receive from mainstream channel is presented on the basic display unit, will be presented on the auxilliary display from 3 picture videos that auxilliary circulation road receives;
Step 205 is assisted stream as auxilliary stream sender's terminal 5 beginnings to the MCU transmission, represents with dash-dot arrows in Fig. 2; Here in advance terminal 5 is set to auxilliary stream sender on the MCU;
Step 206 after MCU receives the auxilliary stream of terminal 5 transmissions, sends flow-control informations to terminal 2,3 and 4, requires to stop to send the main flow video image;
Step 207, MCU sends to purpose terminal 6 with the auxilliary stream that terminal 5 sends by auxilliary circulation road, like this, can see the auxilliary stream picture of terminal 5 on the auxilliary display of purpose terminal 6;
Step 208, when terminal 5 stops to send auxilliary stream, MCU sends flow-control information to terminal 2,3 and 4, require to continue to send the main flow video image, and with the picture decoding of terminal 2,3 and 4 and be connected into 3 pictures, the coding back sends to terminal 6 by auxilliary circulation road, purpose terminal 6 can show 3 pictures that receive from auxilliary circulation road again on auxilliary display.
By above-mentioned steps, can show that display effect is more clear with originally sharing on basic display unit and auxilliary display at 4 pictures that show on the basic display unit (picture of terminal 1～4), improved user's satisfaction.
From top flow process as can be seen, when utilizing auxilliary circulation road to share many pictures in the present embodiment, if MCU need receive and transmit when assisting stream, auxilliary circulation is sent out preferentially.
Those skilled in the art will appreciate that according to the foregoing description the video conferencing system needs in the embodiment of the invention are configured to support auxilliary stream, and the terminal that assurance participates in a conference is all opened auxilliary circulation road; Video conferencing system need be configured to support many pictures, and guarantees that the resources such as encoding and decoding on the MCU can satisfy the requirement of many pictures; On MCU, revise the setting of auxilliary stream input source, input source of the prior art has only the auxilliary stream input of certain auxilliary stream source terminal, is revised as in the present embodiment: many picture inputs that the main flow input of certain terminal, the auxilliary stream input of certain terminal or a plurality of terminal merge.
In existing video conferencing system, when the demanding terminal that receives by mainstream channel and watch broadcast picture is watched certain other terminal, require the picture of viewed terminal can replace broadcast picture, make this terminal no longer can watch broadcast picture.The present invention's technological thought as shown in Figure 1 also can address this problem, and below illustrates.
Fig. 3 is the networking schematic diagram of the another video conferencing system in the embodiment of the invention.As shown in Figure 3, this video conferencing system comprises: MCU and terminal 1～5, and the flow process of present embodiment may further comprise the steps:
Step 301, the video flowings that MCU receiving terminal 1 and 2 sends send to all purpose terminals after forming the broadcasting stream of 2 pictures, are that the purpose terminal describes with terminal 5 here;
Step 302, terminal 5 receives broadcasting stream by mainstream channel, and watches for the user being presented on the basic display unit.
Step 303, when the user of terminal 5 thought the picture of viewing terminal 3, terminal 5 sent the video flowing request message by auxilliary circulation road to MCU, requires to send the video flowing of terminal 3;
In this step, described video flowing request message can be " sendThisSource " signaling in the agreement H.245;
Step 304, after MCU received described video flowing request message, record sent the type of the passage of video flowing request message, promptly write down this video flowing request message and sent by auxilliary circulation road, sent flow-control information to terminal 3 simultaneously, required to send video flowing;
Step 305, after terminal 3 was received flow-control information, beginning sent the main flow video image to MCU to MCU;
Step 306, after MCU received the main flow video image of terminal 3, according to the channel type of record in the step 4, promptly auxilliary circulation road sent to terminal 5 with the video flowing of terminal 3 by auxilliary circulation road;
Step 307, terminal 5 will be presented on the auxilliary display from the picture that auxilliary circulation road receives;
Step 308 is assisted stream as auxilliary stream sender's terminal 4 beginnings to the MCU transmission, represents with dash-dot arrows in Fig. 2;
Step 309 after MCU receives the auxilliary stream of terminal 4 transmissions, sends flow-control informations to terminal 3, requires to stop to send the main flow video image;
Step 310, MCU sends to purpose terminal 5 with the auxilliary stream that terminal 4 sends by auxilliary circulation road, like this, can see the auxilliary stream picture of terminal 4 on the auxilliary display of purpose terminal 5;
Step 311, when terminal 4 stopped to send auxilliary stream, MCU sent flow-control information to terminal 3, required to continue to send the main flow video image, and the image of terminal 3 sent to terminal 5 by auxilliary circulation road, purpose terminal 5 can show the picture of the terminal 3 that receives from auxilliary circulation road again on auxilliary display.
In the above-described embodiments, except that broadcast picture, it can be a plurality of requiring viewed terminal, at this moment, the video of a plurality of terminals is merged into more than one tunnel picture videos stream back in step 306 and sends to the purpose terminal by auxilliary circulation road and get final product no longer repetition here.
Above-mentioned flow process makes the user freely watch the picture of other terminal when watching broadcast picture.
Fig. 4 is the composition structured flowchart of a kind of multipoint control unit MCU of the embodiment of the invention.As shown in Figure 4, this MCU comprises: receiver module 401, merging module 402 and sending module 403, wherein,
Sending module 403, be used for the two-path video flow point after the described merging is not sent to the purpose terminal by mainstream channel and auxilliary circulation road, make the purpose terminal can on main display device, show video, on auxilliary display device, show video from auxilliary circulation road from mainstream channel.
MCU as shown in Figure 4 further comprises: flow-control information module 404 is used for sending the flow-control information that stops to send video flowing to the assigned source terminal when receiver module 401 receives the video flowing that auxilliary stream source terminal sends by auxilliary circulation road; Wherein, described assigned source terminal is that its video flowing sends to MCU and merges the processing back sends to the purpose terminal by auxilliary circulation road source terminal via MCU by mainstream channel;
Sending module 403, the video flowing that is further used for described auxilliary stream source terminal is sent sends to the purpose terminal by auxilliary circulation road.
In Fig. 4, flow-control information module 404 is used for sending the flow-control information that request sends video flowing to described assigned source terminal when receiver module 401 stops to receive the video flowing that auxilliary stream source terminal sends by auxilliary circulation road;
Sending module 403 is used for road video flowing after the described merging is sent to the purpose terminal by auxilliary circulation road.
MCU as shown in Figure 4 further comprises: request message receiver module 405, be used to receive the video flowing request message that the purpose terminal sends by auxilliary circulation road, and notice Flow Control information module 404; Wherein, this video flowing request message requests sends the video flowing of assigned source terminal;
Flow-control information module 404 is used for after receiving described notice, sends the flow-control information that request sends video flowing to described assigned source terminal;
Sending module 403, the road video flowing that is used for described video flowing by the assigned source terminal is merged into sends to the purpose terminal by auxilliary circulation road, and one road video flowing that will be merged into by the video flowing of other source terminal except that the assigned source terminal sends to the purpose terminal by mainstream channel.
In Fig. 4, request message receiver module 405 is used for further writing down this video flowing request message and sending by auxilliary circulation road when receiving the video flowing request message that the purpose terminal sends by auxilliary circulation road;
Sending module 403 is used for the record result according to the request message receiver module, and the road video flowing that described video flowing by the assigned source terminal is merged into sends to the purpose terminal by auxilliary circulation road.
In sum, this MCU of the present invention receives the video flowing that plural source terminal sends by mainstream channel, and the plural video flowing of described reception sends to the purpose terminal by mainstream channel and auxilliary circulation road respectively after being merged into two-path video stream, make the purpose terminal can on main display device, show video from mainstream channel, on auxilliary display device, show technical scheme from the video of auxilliary circulation road, make when realizing multi-screen and multi-picture, having utilized existing auxilliary circulation road to carry out many pictures shares, and need not between MCU and terminal, to set up again extra passage, alleviated the processing burden of MCU and terminal greatly.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of many picture transmission methods is characterized in that, this method comprises:
Multipoint control unit MCU receives the video flowing that plural source terminal sends by mainstream channel;
MCU is merged into two-path video stream with the plural video flowing of described reception; Wherein, the two-path video stream after the described merging is single-image or many image modes, and each picture is corresponding to the video of a source terminal;
The two-path video flow point of MCU after with described merging do not send to the purpose terminal by mainstream channel and auxilliary circulation road, makes the purpose terminal can show the video from mainstream channel on main display device, shows the video from auxilliary circulation road on auxilliary display device.
2, the method for claim 1 is characterized in that, when MCU received that auxilliary stream source terminal passes through the video flowing of auxilliary circulation road transmission, this method further comprised:
MCU sends the flow-control information that stops to send video flowing to the assigned source terminal; Wherein, described assigned source terminal is that its video flowing sends to MCU and merges the processing back sends to the purpose terminal by auxilliary circulation road source terminal via MCU by mainstream channel;
MCU sends to the purpose terminal with the video flowing that described auxilliary stream source terminal sends by auxilliary circulation road.
3, method as claimed in claim 2 is characterized in that, when described auxilliary stream source terminal stopped to send video flowing by auxilliary circulation road, this method further comprised:
MCU sends the flow-control information that request sends video flowing to described assigned source terminal;
The video flowing that MCU sends described assigned source terminal sends to the purpose terminal by auxilliary circulation road after being merged into one road video flowing.
4, the method for claim 1 is characterized in that,
This method further comprised before described MCU receives the video flowing of plural source terminal by the mainstream channel transmission: MCU receives the video flowing request message that the purpose terminal sends by auxilliary circulation road, the video flowing of this video flowing request message requests transmission assigned source terminal; MCU sends the flow-control information that request sends video flowing to described assigned source terminal;
Described MCU receives plural source terminal and comprises by the video flowing that mainstream channel sends: the MCU reception comprises the video flowing that the plural source terminal of described assigned source terminal sends by mainstream channel;
The plural video flowing that described MCU will receive is merged into two-path video stream, and send to the purpose terminal by mainstream channel and auxilliary circulation road respectively and comprise: MCU sends to the purpose terminal by auxilliary circulation road after the video flowing of described assigned source terminal is merged into one road video flowing, sends to the purpose terminal by mainstream channel after will being merged into one road video flowing except that the video flowing of other source terminal the assigned source terminal.
5, method as claimed in claim 4 is characterized in that,
When MCU reception purpose terminal is passed through the video flowing request message of auxilliary circulation road transmission, further write down this video flowing request message by auxilliary circulation road transmission; And send to the purpose terminal by auxilliary circulation road after according to the record result video flowing of described assigned source terminal being merged into one road video flowing.
6, a kind of multipoint control unit MCU is characterized in that, this MCU comprises: receiver module, merging module and sending module, wherein,
Receiver module is used to receive the video flowing that plural source terminal sends by mainstream channel, and is transmitted to the merging module;
Merge module, send to sending module after being used for described plural video flowing is merged into two-path video stream; Wherein, the two-path video stream after the described merging is single-image or many image modes, and each picture is corresponding to the video of a source terminal;
Sending module, be used for the two-path video flow point after the described merging is not sent to the purpose terminal by mainstream channel and auxilliary circulation road, make the purpose terminal can on main display device, show video, on auxilliary display device, show video from auxilliary circulation road from mainstream channel.
7, MCU as claimed in claim 6 is characterized in that, this MCU further comprises: the flow-control information module,
The flow-control information module is used for sending the flow-control information that stops to send video flowing to the assigned source terminal when receiver module receives the video flowing that auxilliary stream source terminal sends by auxilliary circulation road; Wherein, described assigned source terminal is that its video flowing sends to MCU and merges the processing back sends to the purpose terminal by auxilliary circulation road source terminal via MCU by mainstream channel;
Receiver module is further used for receiving the video flowing that auxilliary stream source terminal sends by auxilliary circulation road, and sends to sending module;
Sending module, the video flowing that is further used for described auxilliary stream source terminal is sent sends to the purpose terminal by auxilliary circulation road.
8, MCU as claimed in claim 7 is characterized in that,
The flow-control information module is used for sending the flow-control information that request sends video flowing to described assigned source terminal when receiver module stops to receive the video flowing that auxilliary stream source terminal sends by auxilliary circulation road;
Receiver module is used to receive the video flowing of described assigned source terminal transmission and be transmitted to the merging module;
Merge module, after being used for the video flowing that described assigned source terminal sends is merged into one road video flowing, send to sending module;
Sending module is used for road video flowing after the described merging is sent to the purpose terminal by auxilliary circulation road.
9, MCU as claimed in claim 6 is characterized in that, this MCU further comprises: the request message receiver module,
The request message receiver module is used to receive the video flowing request message that the purpose terminal sends by auxilliary circulation road, and notice Flow Control information module; Wherein, this video flowing request message requests sends the video flowing of assigned source terminal;
The flow-control information module is used for after receiving described notice, sends the flow-control information that request sends video flowing to described assigned source terminal;
Receiver module is used to receive the video flowing that the plural source terminal that comprises described assigned source terminal sends by mainstream channel, and is transmitted to the merging module;
Merge module, be used for the video flowing of described assigned source terminal is merged into one road video flowing, send to sending module after will being merged into one road video flowing except that the video flowing of other source terminal the assigned source terminal;
Sending module, the road video flowing that is used for described video flowing by the assigned source terminal is merged into sends to the purpose terminal by auxilliary circulation road, and one road video flowing that will be merged into by the video flowing of other source terminal except that the assigned source terminal sends to the purpose terminal by mainstream channel.
10, MCU as claimed in claim 9 is characterized in that,
The request message receiver module is used for further writing down this video flowing request message and sending by auxilliary circulation road when receiving the video flowing request message that the purpose terminal sends by auxilliary circulation road;
Sending module is used for the record result according to the request message receiver module, and the road video flowing that described video flowing by the assigned source terminal is merged into sends to the purpose terminal by auxilliary circulation road.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895717A (en) * | 2010-06-29 | 2010-11-24 | 上海紫南信息技术有限公司 | Method for displaying pure voice terminal image in video session |
| CN104156187A (en) * | 2014-07-24 | 2014-11-19 | 惠州Tcl移动通信有限公司 | Multi-screen display equipment |
| CN104471949A (en) * | 2013-06-28 | 2015-03-25 | 株式会社东芝 | Video output device and video output method |
| CN104954729A (en) * | 2014-03-31 | 2015-09-30 | 鸿富锦精密工业（深圳）有限公司 | Video conference data processing method and system |
| CN108055497A (en) * | 2013-05-23 | 2018-05-18 | 华为技术有限公司 | A kind of conference signal playing method and device, video conference terminal, mobile equipment |
| CN110113307A (en) * | 2019-04-01 | 2019-08-09 | 视联动力信息技术股份有限公司 | A kind of method and apparatus of live streaming |
| CN110740286A (en) * | 2018-07-18 | 2020-01-31 | 中兴通讯股份有限公司 | video conference control method, multipoint control unit and video conference terminal |
| CN110830750A (en) * | 2018-08-07 | 2020-02-21 | 视联动力信息技术股份有限公司 | Data transmission method and device based on video network |
| CN112055165A (en) * | 2019-06-06 | 2020-12-08 | 杭州海康威视数字技术股份有限公司 | Video communication method, device, system, server, client and storage medium |
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2008
- 2008-12-17 CN CN2008102397867A patent/CN101437140B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895717A (en) * | 2010-06-29 | 2010-11-24 | 上海紫南信息技术有限公司 | Method for displaying pure voice terminal image in video session |
| CN108055497A (en) * | 2013-05-23 | 2018-05-18 | 华为技术有限公司 | A kind of conference signal playing method and device, video conference terminal, mobile equipment |
| CN104471949A (en) * | 2013-06-28 | 2015-03-25 | 株式会社东芝 | Video output device and video output method |
| CN104954729A (en) * | 2014-03-31 | 2015-09-30 | 鸿富锦精密工业（深圳）有限公司 | Video conference data processing method and system |
| CN104156187A (en) * | 2014-07-24 | 2014-11-19 | 惠州Tcl移动通信有限公司 | Multi-screen display equipment |
| CN110740286A (en) * | 2018-07-18 | 2020-01-31 | 中兴通讯股份有限公司 | video conference control method, multipoint control unit and video conference terminal |
| CN110830750A (en) * | 2018-08-07 | 2020-02-21 | 视联动力信息技术股份有限公司 | Data transmission method and device based on video network |
| CN110113307A (en) * | 2019-04-01 | 2019-08-09 | 视联动力信息技术股份有限公司 | A kind of method and apparatus of live streaming |
| CN112055165A (en) * | 2019-06-06 | 2020-12-08 | 杭州海康威视数字技术股份有限公司 | Video communication method, device, system, server, client and storage medium |
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| CN101437140B (en) | 2011-11-16 |
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