CN101198008A - Method and system for implementing multi-screen and multi-picture - Google Patents
Method and system for implementing multi-screen and multi-picture Download PDFInfo
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- CN101198008A CN101198008A CNA2008100018048A CN200810001804A CN101198008A CN 101198008 A CN101198008 A CN 101198008A CN A2008100018048 A CNA2008100018048 A CN A2008100018048A CN 200810001804 A CN200810001804 A CN 200810001804A CN 101198008 A CN101198008 A CN 101198008A
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Abstract
The invention provides a multi-screen multi-picture realization method and a system in a video conferencing system. The video conferencing system comprises a multipoint control unit and a plurality of terminals; the method includes the following steps that: (a) the terminals establish connection with the multipoint control unit and send local video streams to the multipoint control unit; (b) the multipoint control unit composes the input video streams of the terminals into a plurality of output video streams; (c) the multipoint control unit sends the output video streams to the terminals, wherein the content of each output video stream is a multi-picture video composed by one or a plurality of input video streams; (d) the terminals display the output video streams on a plurality of displays after reception. According to the method of the invention, the terminals taking part in communication can use a plurality of displays to display video images of a plurality of far end conference rooms, and users can see more and larger video images of the far end conference rooms, thereby improving the video experience of the users, strengthening the communication effects of users and promoting the use value of the system.
Description
Technical field
The present invention relates to the video conference field, particularly a kind of method and system of in video conferencing system, realizing multi-screen and multi-picture.
Background technology
Video conferencing system is to support the multimedia communications system of sound, video and data communication, and it comprises video conference terminal, MCU (Multipoint Control Unit, multipoint control unit) and some other equipment.
Video conferencing system in the market generally meets H.320 (international telecommunication union telecommunication's standard H.320) or ITU-T standard H.323 of ITU-T, and the system that meets IETF SIP (the Internet engineering duty group session initializtion protocol) standard is also arranged.
Terminal is the equipment that the user uses, comprise codec in the terminal, codec is responsible for finishing the compressed encoding and the decoding of medium such as sound, video, terminal also connects microphone, camera, display, the sound playing subsystem, be used for finishing the input and output of sound, video, terminal also comprises user's input interface, the user by input interface to terminal input instruction and information.Terminal is responsible for and the other side's terminal connects, and consults both sides' codec capabilities, and the code decode algorithm that adopts both sides to support communicates.
MCU is used for finishing multi-party communication.The terminal and the MCU that participate in multi-party communication set up calling, and carry out the transmitting-receiving of medium, and MCU is responsible for finishing the exchange and the mixing of medium.MCU can synthesize a multiple image to the video that obtains from a plurality of terminals, sends to different terminals then.
The part terminal is also supported the multi-party communication ability, promptly can be simultaneously and a plurality of terminal connect.The terminal that this Terminal Type is called the built-in MCU function herein.
In multipoint conference, many picture functions allow the user can see the video of a plurality of call terminals simultaneously, help to improve communication effect, are very welcome functions.
Present many pictures are synthesized by the terminal of MCU or built-in MCU usually, finally give receiving terminal as one road dynamic image distribution.
Under many situations, user's terminal equipment configuration plural display, video conferencing system is supported two-path video stream at present, but existing many pictures show only permission synthetic and transmission in a video flowing, another video flowing only transmits a video source image, for example transmits the VGA shows signal of computer.If many pictures are synthesized one road video flowing, can only be presented in the display, the viewing area of distributing to each sprite like this is less.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and system of realizing multi-screen and multi-picture, solves in the existing video conference, and many pictures can only be presented in the screen, cause the little problem in sprite viewing area, improve user experience.
In order to solve the problems of the technologies described above, the invention provides the method that realizes multi-screen and multi-picture in a kind of video conferencing system, described video conferencing system comprises several terminals, comprises following steps:
(a) terminal and multipoint control unit connect, and terminal sends to described multipoint control unit to local video stream;
(b) described multipoint control unit synthesizes a plurality of outputting video streams to the input video stream that described terminal sends, and each outputting video streams content is by the synthetic many pictures of one or more described input video streams;
(c) described multipoint control unit sends described a plurality of outputting video streams to described terminal;
(d) described terminal is presented on a plurality of displays after receiving described a plurality of outputting video streams.
Further, said method also can have following characteristics, and in the step (a), described multipoint control unit is an independent multipoint control unit or is built on the terminal of arbitrary described video conferencing system.
Further, said method also can have following characteristics, in the step (a), described terminal and described multipoint control unit by ITU-T H.323 or ITU-T H.320 or the Internet engineering duty group session initializtion protocol IETF Session Initiation Protocol connect.
Further, said method also can have following characteristics, in the step (a), described multipoint control unit and described terminal are set up a two way audio passage, a terminal arrives the video channel of multipoint control unit, one or more multipoint control units transmit described input video stream and outputting video streams to the video channel of terminal by described voice-grade channel and video channel.
Further, said method also can have following characteristics, and described multipoint control unit depends on the display number of terminal to the video channel number of terminal, described multipoint control unit through consultation or manual configuration obtain the display number of described terminal.
Further, said method also can have following characteristics, in the described step (b), the user is by the synthetic effect of the local many pictures of the described described terminal of the described multipoint control unit of terminal transmission signaling request, and described multipoint control unit carries out the synthetic of input video stream according to described signaling request.
Further, said method also can have following characteristics, comprises following one or more parameter in the described signaling request: output video flow amount, many frame numbers of every road outputting video streams, the sprite content that many pictures comprise, many picture layout.
Further, said method also can have following characteristics, and in the described step (b), described multipoint control unit is not for comprising the input video stream of described terminal this locality in the synthetic outputting video streams of each described terminal.
Further, said method also can have following characteristics, and in the described step (c), described multipoint control unit sends many picture layout of described each outputting video streams of terminal of signaling.
The present invention also proposes a kind of video conferencing system that realizes multi-screen and multi-picture, comprise terminal, multipoint control unit, described terminal, be used for local video stream is sent to described multipoint control unit, also be used to receive a plurality of outputting video streams of described multipoint control unit transmission and be presented at a plurality of displays;
Described multipoint control unit is used for the input video stream of described terminal is synthesized a plurality of outputting video streams and sends to described terminal, and wherein each outputting video streams content is by the synthetic many pictures of one or more input video streams.
Adopt method of the present invention, the terminal that participates in communication can use a plurality of displays to show the video image of a plurality of remote sites, the user can see the video image of bigger or more remote site, improved user's video tastes, strengthen the user communication effect, promoted the use value of system.
Description of drawings
Fig. 1 is the flow chart of method of the present invention;
Fig. 2 is the equipment network figure of the embodiment of the invention;
Fig. 3 is the method flow diagram of the embodiment of the invention;
Fig. 4 is the schematic diagram of the synthetic many pictures of MCU in the embodiment of the invention;
Fig. 5 is some representative configuration schematic diagrames of many pictures;
Fig. 6 is the Signalling exchange sequence schematic diagram that terminal and MCU connect.
Embodiment
The present invention is by synthesizing many pictures the video flowing more than the two-way, and every road video flowing is respectively many picture videos (special case that comprises single-image), and every road video flowing is presented on the different displays.Under identical sprite sum, each sprite has bigger viewing area to use like this, the sprite that the user can see greatlyyer, thus improve quality of experience of video.
As shown in Figure 1, the method for the invention comprises following steps:
Wherein, can use between terminal and MCU or the built-in MCU terminal but be not restricted to ITU-TH.323, ITU-T H.320, one of IETF Session Initiation Protocol connects.
Connect and set up in the process, do not get rid of the participation that third party device is arranged.But these equipment are not the cores that the present invention will illustrate, so omitted associated description.
MCU or built-in MCU terminal can be known the display number of terminal through consultation, and MCU or built-in MCU terminal also can obtain the display number of terminal by other approach (as carrying out manual configuration).
MCU and terminal are set up a two way audio passage, a two-way video passage (is equivalent to the video channel of a terminal to MCU, a MCU arrives the video channel of terminal), a plurality of MCU are to the one-way video passage of terminal, and wherein the one-way video port number depends on the display number of terminal.When terminal comprises n display, need set up n-1 one-way video passage.The method that above-mentioned MCU and terminal are set up passage is an example, also can set up passage, number of active lanes with other modes and also be not limited to above-mentioned explanation.Can set up corresponding port number according to the needs of terminal, for example terminal comprises a plurality of displays, but only uses part display wherein to show, then only sets up video channel for these displays.
Wherein, the user can send the synthetic effect of the many pictures in terminal local terminal of signaling request MCU or built-in MCU by terminal equipment, and the parameter in this signaling request includes but not limited to: output video flow amount, many frame numbers of every road outputting video streams, the sprite content, many picture layout etc.
The terminal of MCU or built-in MCU can be by many picture layout of each outputting video streams of signaling terminal.
The present invention also proposes a kind of video conferencing system that realizes multi-screen and multi-picture, comprise terminal, multipoint control unit, described terminal, be used for local video stream is sent to described multipoint control unit, also be used to receive a plurality of outputting video streams of described multipoint control unit transmission and be presented at a plurality of displays; Described multipoint control unit, be used for the input video stream of described terminal is synthesized a plurality of outputting video streams and sends to described terminal, wherein each outputting video streams content is that Fig. 2 has described the equipment connecting relation of a specific embodiment of the present invention by the synthetic many pictures of one or more input video streams.In this example, terminal and MCU are connected in the IP network, communicate by IP network.Terminal is communicated by letter with MCU and is met H.323 standard of ITU-T.Each terminal has two displays in this embodiment, and supports to receive two-path video stream.MCU has the synthesis capability of many pictures.
Fig. 3 has described the method flow of the embodiment of the invention.
Step 310, terminal 1 are set up with MCU and H.323 are connected.
Can be terminal 1 active call MCU, also can be MCU calling terminal 1.
H.323 connect and set up process and comprise call signaling process, H.245 signaling procedure.The connection of setting up comprises signalling path, and a plurality of media channels comprise 1 two-way sound channel, 1 two-way video channel, and 1 unidirectional MCU arrives the video channel of terminal.Concrete signalling interactive process as shown in Figure 6.
Step 320, terminal 1 sends to MCU to the video flowing in this meeting-place by a video channel.
It is synthetic that step 330, the video flowing that MCU sends 4 terminals are carried out many pictures, synthesizes a plurality of outputting video streams.
In the present embodiment, synthesize two outputting video streams, each outputting video streams comprises the video image of part terminal, and for example outputting video streams comprises the video image of terminal 1 and terminal 2, and another outputting video streams comprises the video image of terminal 3 and terminal 4.
MCU also can be the synthetic different many picture effects of each terminal.For example, send to the input video stream that does not comprise terminal itself in the outputting video streams of each terminal.
Step 340, MCU sends to terminal 1 to 2 synthetic outputting video streams by two video channels.Simultaneously, MCU can use many picture layout pattern of each outputting video streams of signaling terminal.
Step 350, after terminal was received outputting video streams, two outputting video streams were presented at different displays.
Fig. 4 is the synthetic schematic diagram of many pictures for MCU handles.Merge into two outputting video streams at last from the video flowing that 4 terminals are come, each outputting video streams has comprised the video image of 2 terminals.
Fig. 5 is several many pictures display layout schematic diagram.Provided 1 picture among the figure, 2 sprites (about arrange), 3 sprites (on 12 times arrange), 4 sprites (each 1 arrangement up and down), 6 sprites, the topology example of 9 sprites.
Fig. 6 is the Signalling exchange sequence schematic diagram that terminal and MCU connect.
Suppose terminal active call MCU.
1, terminal is set up the passage that transmits call signaling at first and between the MCU.
2, terminal on the call signaling passage and MCU to carry out call signaling mutual.Terminal sends Setup message, MCU response Alerting, Connect message, and calling procedure is finished.
3, set up between terminal and the MCU and transmit the passage of H.245 controlling signaling.
4, terminal is controlled the mutual of signaling with MCU on the control signalling path.
Terminal sends TerminalCapabilitySet message to MCU, MCU response TerminalCapabilitySetAck acknowledge message.MCU sends TerminalCapabilitySet message to terminal, terminal response TerminalCapabilitySetAck acknowledge message.Both sides' capabilities exchange is finished.The reception and the transmission of a sound stream, two video flowings supported in the capability set indication of terminal and MCU.
Terminal sends MasterSlaveDetermination message to MCU, MCU response MasterSlaveDeterminationAck acknowledge message, MCU sends MasterSlaveDetermination message to terminal, terminal response MasterSlaveDeterminationAck acknowledge message.The both sides principal and subordinate determines to consult to finish.
Terminal sends OpenLogicalChannel message to MCU, and the sound stream passage is set up in request, and MCU sends OpenLogicalChannel message to terminal, and the sound stream passage is set up in request.Terminal response OpenLogicalChannelAck acknowledge message, MCU response OpenLogicalChannelAck acknowledge message.Both sides have set up two-way sound channel.
Similarly, set up first two-way video flowing passage between terminal and the MCU, also set up second unidirectional video flowing passage in addition between terminal and the MCU.At last, on sound, video flowing passage, send receiving media data between MCU and the terminal.
Adopt method of the present invention, the terminal that participates in communication can use a plurality of displays to show the video image of a plurality of remote sites, the user can see the video image of bigger or more remote site, improved user's video tastes, strengthen the user communication effect, promoted the use value of system.
Claims (10)
1. realize the method for multi-screen and multi-picture in the video conferencing system, described video conferencing system comprises multipoint control unit and several terminals, comprises following steps:
(a) terminal and multipoint control unit connect, and terminal sends to described multipoint control unit to local video stream;
(b) described multipoint control unit synthesizes a plurality of outputting video streams to the input video stream that described terminal sends, and each outputting video streams content is by the synthetic many pictures of one or more input video streams;
(c) described multipoint control unit sends described a plurality of outputting video streams to described terminal;
(d) described terminal is presented on a plurality of displays after receiving described a plurality of outputting video streams.
2. the method for claim 1 is characterized in that, in the step (a), described multipoint control unit is an independent multipoint control unit or is built on the terminal of arbitrary described video conferencing system.
3. the method for claim 1 is characterized in that, in the step (a), described terminal and described multipoint control unit by ITU-T H.323 or ITU-T H.320 or the Internet engineering duty group session initializtion protocol IETF Session Initiation Protocol connect.
4. the method for claim 1, it is characterized in that, in the step (a), described multipoint control unit and described terminal are set up a two way audio passage, a terminal arrives the video channel of multipoint control unit, one or more multipoint control units transmit described input video stream and outputting video streams to the video channel of terminal by described voice-grade channel and video channel.
5. as claim 1 or 4 described methods, it is characterized in that described multipoint control unit depends on the display number of terminal to the video channel number of terminal, described multipoint control unit through consultation or manual configuration obtain the display number of described terminal.
6. the method for claim 1, it is characterized in that, in the described step (b), the user is by the synthetic effect of the local many pictures of the described described terminal of the described multipoint control unit of terminal transmission signaling request, and described multipoint control unit carries out the synthetic of input video stream according to described signaling request.
7. method as claimed in claim 6 is characterized in that, comprises following one or more parameter in the described signaling request: output video flow amount, many frame numbers of every road outputting video streams, the sprite content that many pictures comprise, many picture layout.
8. as claim 1 or 6 or 7 described methods, it is characterized in that in the described step (b), described multipoint control unit is not for comprising the input video stream of described terminal this locality in the synthetic outputting video streams of each described terminal.
9. as claim 1 or 6 or 7 described methods, it is characterized in that in the described step (c), described multipoint control unit sends many picture layout of described each outputting video streams of terminal of signaling.
10. video conferencing system that realizes multi-screen and multi-picture, comprise terminal, multipoint control unit, it is characterized in that, described terminal, be used for local video stream is sent to described multipoint control unit, also be used to receive a plurality of outputting video streams of described multipoint control unit transmission and be presented at a plurality of displays;
Described multipoint control unit is used for the input video stream of described terminal is synthesized a plurality of outputting video streams and sends to described terminal, and wherein each outputting video streams content is by the synthetic many pictures of one or more input video streams.
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| 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 |
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