CN102065264B - Video command/session system without MCU and method - Google Patents
Video command/session system without MCU and method Download PDFInfo
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Abstract
The invention aims to provide a video command/session system without a micro-programmed control unit (MCU) and a method applied in the fields of production scheduling, emergency command and the like of industries of electric power, petrifaction, army and the like. The system is based on a soft switch architecture and comprises a plurality of Internet contact center (ICC) video command terminals, a device vector table (DVT) desktop video communication terminal, a model view controller (MVC) mobile video acquisition and communication terminal, a forward voice channel (FVC) fixed video acquisition and communication terminal and a video disk recorder (VDR) video server. The session initiation protocol (SIP) adopted among the components of the system is used as a call control protocol. In a video command or video session, the audio is mixed by an intelligent sound mixing module of the ICC, and the mixed audio is transmitted to the related terminals; and the video is pushed to a plurality of DVTs by the ICC to watch, and the DVTs and the low level ICC can also actively apply for calling the video of a certain channel. The video is automatically distributed by a receiving end so as to realize a video command/session without the MCU or a multicast mode.
Description
Technical field
The present invention relates to video, voice communication technology field, particularly relate in video directing/conference system without MCU distributed video method for stream processing, and support the video conference that multi-channel video Push is combined with the application of single channel video and the application model that video monitoring organically combines, also relate to a kind of portable video acquisition and communication terminal and a kind of integrated desktop terminal merging conference terminal and PC display.
Background technology
To raise the management level, promote the development trend of safe production awareness with industry user, how to cut operating costs, increase work efficiency, strengthen the interdepartmental contact in strange land, ensure that higher level displays gradually to problems such as subordinate's operational environment and the clear understanding of working condition, the quick position promoting case of emergency and solutions, traditional video conference and video monitoring system all cannot meet this type of demand of user, and video directing/conference system arises at the historic moment thus.
Video directing/conference system expands on the basis of independently video conference, video monitoring system, by the video communication applications system that video conference, video monitoring organically combine, carry out specific aim optimization for existing video conference, video monitoring connected applications mode Problems existing.
Because video conference, video monitoring are independently two cover systems, video conference terminal is accessed after monitoring video flow (compressed encoding) from video monitoring system is normally carried out pre decoding by the pattern that therefore video conference, video monitoring system combine, the monitoring video flow (pre decoding) of supervisory control system is configured in video conference as the video conference terminal that a road is virtual by MCU, and by MCU control video conference terminal, this road monitor video image is broadcasted to other conference terminals in meeting-place, realize the combination of video conference and video monitoring thus.
Current this pattern combines due to it intrinsic deficiency realized, can only be by chairman, the conference terminal of certain fixing road monitor video image to setting is in advance broadcasted, result in system application model fixed single, can only realize sub-venue viewing main meeting-place or chairman select fix certain road monitor video.When some sub-venues or multiple sub-venue are being watched outside the monitor video image of specifying, when also wishing to watch other monitor videos according to self concrete condition, present mode then cannot meet the demand of user.And in industry user, the individual demand on this general character Demand Base is ubiquitous.
Based on the video conferencing system of MCU, user-selected MCU model, just determines the terminal quantity that its video conference network can be held, and the expansion of network capacity just means that the configuration of MCU increases or or even the replacing of MCU or cascade.The high price of MCU itself, comprises dilatation and causes replacing or cascade MCU all to mean the very high investment costs that user pays for this reason, also mean that its extension of network of video conferencing system based on MCU system is poor, can only dilatation within the scope of the port arrangement of MCU.
From the aspect of user operation, present mode complex operation, the meeting operating personnel being familiar with systems soft ware hardware are needed before meeting starts, system is arranged accordingly, comprise conference member editor, transmission network parameter configuration etc., also need distal portion meeting-place personnel to coordinate the debugging carrying out sub-venue conference terminal simultaneously.The specialized using forestland of such one, makes user cannot resemble familiar dialing and uses business at any time.
In sum, the inherent shortcoming of present mode, result in industry user in the face of its distinctive production scheduling, emergency repair commander, long-range to hold a conference or consultation etc. individual demand time, adopt existing system not meet consumers' demand, and dispose and use all inconvenience.
This patent is based on the SIP communication protocol of application maturation at present, propose without MCU, video directing/conference system solution without stand-alone application server, non-multicast formula, can be good at solving the problem, under the command scheduling within the scope of Industry-oriented Subscriber Unit, emergency repair, the long-range applied environment such as to hold a conference or consultation, application advantage is obvious.
Summary of the invention
The object of the invention is the shortcoming overcoming existing application model, based on SIP standard, provide a kind of video directing/conference system solution and media processing method thereof.Native system, without the need to MCU, does not need the stand-alone application server of standard soft-exchange construction yet, and terminal plug and play, system are disposed quick, and user operation is convenient and reliable.And do not need bottom transmission network to support multicast pattern, can the investment of available protecting user early stage in transmission network is built.
Technical scheme of the present invention is as follows:
In this video directing/conference system, the component of a system comprises:
The visual video directing terminal of 1.ICC, has the control authority of meeting or commander, is equivalent to the role of chairman or commander, participate in command scheduling and Conference control directly; Can be there is multiple ICC in system, there are differences between main ICC and other inferior grade ICC on commanding power and configuration management authority;
2.DVT desktop video communication terminal, having certain command & control authority (mainly to the control authority of video capture device), is with the identity participant of consultant's (hearing) but more, is the participant of meeting;
3.MVC mobile video acquisition and communication terminal are the subordinate in command system, are responsible for the commander of acceptance commander side and make corresponding action to the order that commander side sends; MVC adopts wireless technology, makes to produce, the on-the-spot personnel that speedily carry out rescue work can move in certain wireless coverage, thus is conducive to more clear for the situation at scene and represent flexibly;
4.FVC fixed video gathers and communication terminal, is the subordinate in command system, and commander's (camera lens zooms out, rotation etc.) that its video capture device can accept commander side makes corresponding action; FVC can only be fixedly installed on certain field position;
5.VDR recording service device
Note: the bi-directional communication function of the equal support voice of MVC, FVC
MVC and FVC is the component of a system that video monitoring subfunction relates to, and completes the on-the-spot unidirectional acquisition function of monitoring image such as production scheduling, emergency repair by it; Simultaneously the bi-directional communication function of its also support voice, had both supported point-to-point voice communication, had also supported playing from the meeting-place audio-frequency information decoding after ICC intelligence audio mixing of receiving.In this sense, MVC, FVC are also conference terminals, embody the fusion of video monitoring function and video conference function thus.The video image (compressed encoding) that MVC and FVC gathers, video directing system can be entered without the need to implementing pre decoding, only need MVC, FVC ICC after ICC registration by direct for monitoring image Push to relevant conference terminal viewing, also can retrieve for examination monitoring image by each terminal by SIP dialog application.Visible, in the inventive solutions, video monitoring system and video conferencing system have realized organically blending, and MVC, FVC have become the organic component of video directing/video conferencing system.
Each component inside of system is integrated with SIP module, adopt standard SIP protocol as call control protocol mutually, video directing or video conference are resolved between multiple ICC, and the SIP session between the terminal equipment such as ICC and MVC, FVC, DVT, VDR, every group session carries out call treatment and media negotiation work independently by the associated components participating in session is distributed.System each component (referring to ICC, DVT, MVC, FVC) except VDR, has media processing units, comprises audio processing modules and video processing module.First each component carries out time stamp mark after collection local audio information and video information, and then transmission enters in grid respectively, completes audio/video synchronization and media processing voluntarily by receiving terminal.
ICC has the control authority of meeting or commander, is equivalent to the role of chairman or commander, participates in command scheduling and Conference control directly.The commanding power of ICC and Conference control authority, refer to and initiate commander's meeting, determine to command conference member, agree to that the authority such as video image/conference voice of listening request, selecting needs to broadcast is retrieved for examination/is adjusted to the data flow of other terminal.DVT then control authority is relatively little, and mainly to the control authority of video capture device, is mostly participate in commander with the identity of consultant's (hearing).
ICC controls meeting to start, after calling and called in the many groups SIP session involved by this video directing or video conference successfully connect, the audio processing modules of main ICC, inferior grade ICC, DVT, MVC, FVC is responsible for gathering local audio signal, inferior grade ICC, DVT, MVC, FVC also need the local voice gathered to be sent to main ICC, are responsible for carrying out intelligent audio mixing by main ICC local audio and from the audio frequency of other conference member by main ICC.Commander/conference audio after audio mixing synthesis is controlled to broadcast to the conference member of specifying by main ICC, plays by after conference member voluntarily audio decoder.ICC can control certain conference member, shields its conference speech or block it to receive the conference audio after synthesizing.Audio frequency after audio mixing sends to VDR to carry out recording and preserves.Refer to accompanying drawing 2.
The video processing module of main ICC, inferior grade ICC, DVT, MVC, FVC is responsible for gathering local video image, and main ICC is all issued by underlying data network under the command & control of ICC, but process without the conjunction road of ICC, but be directly transmitted to correlation reception terminal by main ICC according to commander/session logic.The video way that ICC can control (receive and forward), namely the meeting capacity of present system, can reach more than 64 sides; But the quantity of the conference member that ICC can manage (comprising video monitoring) is far longer than its number formulary that can process.Further, video flowing distribution has two kinds of patterns.A kind of pattern is that ICC is according to commander or meeting needs, to the multiple paths of video images shared with each conference terminal or discuss be needed (can be the monitor video of multichannel from MVC, FVC, also the meeting-place video from ICC and DVT can be made), Push is to participant terminal by force.By the multi-channel video of Push, be directly transmitted to receiving terminal by main ICC.The second pattern is participant terminal, based on the special circumstances at its scene, need (can be monitor video by a certain road video of retrieving for examination personalized outside the multi-channel video of Push, also can be meeting-place video), at this moment can to ICC application and through ICC agree to after, this road applies for that separately the video of retrieving for examination is transmitted to the reception conference terminal of filing an application by main ICC.For receiving terminal, its local video, the video of being retrieved for examination by the multi-channel video of Push and application, show after decoding voluntarily by this receiving terminal.Be transmitted to VDR by main ICC after needing the video of video recording to be specified by ICC and carry out recording preservation.Refer to accompanying drawing 3.
Compared with prior art, the present invention is based on soft-exchange construction, using Session Initiation Protocol as call control protocol, integrated SIP module in each component of a system, commander or convention business logic carry out setup control by ICC visual command control desk, many groups SIP session between video directing or video conference being resolved to by multiple component of a system, and the combination organizing SIP session is exactly a video directing or video conference more.From system architecture, there is not an independently application server in the present invention.On media processing, Media Stream controls to be completed by ICC, and the tupe of Media Stream is: the processing policy that audio medium stream process sends after adopting ICC to concentrate audio mixing; Video media stream process then have employed the framework of End-to-End (end-to-end), main ICC needs to choose the relevant each conference terminal of meeting according to meeting, its local video media stream converges to main ICC by relevant each conference terminal, carry out video flowing forwarding by main ICC according to commander/session logic, video flow processing then completes by the conference terminals such as ICC, DVT are distributed voluntarily.The picture displaying contents of main ICC is needed to choose voluntarily according to meeting by main ICC (comprising monitor video and meeting-place video), also can its display of video content of temporary changes in meeting; Main ICC controls inferior grade ICC, the picture displaying contents of multiple DVT is controlled by ICC (comprising the video that the video of Push and terminal apply for separately retrieving for examination), picture display layout then by terminal from Row sum-equal matrix.
Whole system framework have employed without MCU, full distributed framework without application server, system is disposed simple, quick, whole system cheap, greatly extends systematic difference environment.And compare usual Video Conference System, power system capacity scale of the present invention has the order of magnitude to promote, and adopts current mainstream configuration PC, can reach the above meeting of 64 side, can meet that industry user speedily carries out rescue work for emergency command completely, the demand of production scheduling etc.And the deployment of system does not need bottom data transmission network to upgrade supports multicast pattern, the development of infrastructure network investment in available protecting user early stage.
From function of the present invention, ICC Push multichannel meeting-place and monitor video image, retrieve for examination the video image outside Push image with sub-venue application, the combination of two kinds of patterns, make the present invention while fast meeting most meeting-place general character demand, the individual demand of sub-venue can also be met.
From user's routine use and maintenance, the components of a system such as ICC, DVC, MVC, FVC, DVR, as long as can plug and play be supported on the net in user, and all components of a system such as ICC, DVC, MVC, FVC, DVR are all connected to the network with RJ45 Ethernet interface, user uses as simple as dialing, makes the operation and maintenance of user simple.The migration of terminal, also without the need to being configured amendment.
Accompanying drawing explanation
Figure 1 shows that system components SIP call model figure
Figure 2 shows that the system audio transaction module figure adopting intelligent audio mixing pattern
Figure 3 shows that system video transaction module figure
Embodiment
With example, the present invention is described in further details with reference to the accompanying drawings below:
Instance system simplified model as shown in Figure 1, assuming that participant side is ICC commander side (A), participant DVT1 (B), participant DVT2 (C), live video gathers and communication terminal MVC (D), on-the-spot fixed video collection and communication terminal FVC (E), recording service device DVR (F).Wherein A, B, C, F are positioned at user and handle official business location, the field position such as D, E are positioned at commander, speedily carry out rescue work, disaster relief.Commander or the meeting authority of each terminal be, A, B, C all can make a speech discussion and visible video, and D can make a speech discussions, and E does not participate in commander and discusses only to upload and on-the-spotly fix monitoring audio/video.The video of DVR video and audio recording is from A, B, C, D.Then the detailed step (flow chart is see Fig. 2 and Fig. 3) of video directing/video conference of the present invention is:
After 1.ICC, DVT, MVC, FVC, DVR start, by Session Initiation Protocol, all register at ICC.ICC carries out authority setting to ICC, DVT, MVC, FVC, DVR component that meeting relates to: A, B, C are audio/video bidirectional transmit-receive authority, D is audio frequency bidirectional transmitting-receiving authority (video of D only can one-way transmission), and E is audio frequency one-way transmission authority (video of E only can one-way transmission).Command centre ICC select by A, B, C, D, E etc. 5 road video be all presented at that it is local, by from A, B, C three tunnel commander/TV news and come and force Push to B, C two conference members of participant from the monitor video of D, jointly the monitor video image of speedily carrying out rescue work of the scene from D is held a conference or consultation.To A, B, in order to further understand field condition, outside the 4 road videos watching Push, applies for that monitor video is fixed at the scene of retrieving for examination separately from E.Through holding a conference or consultation, the decision instruction formed is speedily carried out rescue work or dispatcher D to scene with the mode laxative remedy of phonetic order.F carries out video recording to the audio frequency and video from A, B, C, D and preserves.
2.A, B, C, D, E five terminals gather oneself local audio signal and vision signal separately, and after carrying out time stamp mark, transmission enters in grid respectively.
3. Audio Signal Processing: A, B, C, D, E five terminals gather oneself local audio signal separately, and the local audio signal of oneself is sent to A through data network by B, C, D, E, carries out intelligent meeting audio mixing after being converged by A.According to above-mentioned embodiment service logic, the commander after audio mixing/conference audio information sends to B, C, D (A oneself has the voice after audio mixing) by A simultaneously, by B, C, D from being about to play after remixed audio is decoded.E, due to the setting of commander/session logic, can only send local audio information, not receive conference voice information.
4. video frequency signal processing: A, B, C, D, E five terminals gather oneself local video signal separately.According to detailed step 1, A selects display (A, B, C, D, E five road video), then its local video stream is all converged to A by B, C, D, E; Set according to the commander/session logic of this embodiment by A, A, C, D vision signal is directly transmitted to B, A, B, D vision signal is directly transmitted to C.A from being about to B, C, D, E two-way commander/TV news signal and two-way on-site supervision decoding video signal, and together with A local video totally 5 tunnel screen images show; C from being about to A, B two-way commander/TV news signal and D mono-tunnel on-site supervision decoding video signal, and together with C local video totally 4 tunnel screen images show.Except accepting by except the 4 road videos of the A Push local video of road video and C (A, C, the D tri-), B apply for the monitoring image of retrieving for examination separately from E to A, after A agreement, the scene of E is fixed monitor video and is transmitted to B by A.B from being about to A, C two-way commander/TV news signal and D, E two-way on-site supervision decoding video signal, and together with B local video totally 5 tunnel screen images show.The video image thus C terminal shown is the meeting-place video from A, B, C and the on-the-spot mobile video from D; The video image that B terminal shows is the meeting-place video from A, B, C and the on-the-spot mobile monitor video from D, and B applies for that separately monitor video is fixed at the scene from E of retrieving for examination.A is as chairman's comparatively look of commanding or meeting, its authority can retrieve for examination any TV news and monitor video as required voluntarily, describe according to previous examples system, the video image that A terminal shows is from the meeting-place video of A, B, C and the live video from D, E; The video image that A can increase in a meeting (upper limit of total display video way is 6 tunnels that picture display general layout 5+1 limits) or change in its local display.
5. commander/session recording, video recording: F carries out video recording preservation to the local video from A, B, C, D, E, and preserves meeting remixed audio.
The above; be only the typical embodiment of the present invention, but protection scope of the present invention is not limited thereto, any people being familiar with this technology is in the technical scope disclosed by the present invention; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (1)
1. without video directing/conference system of MCU, comprising: the visual video directing terminal of ICC, DVT desktop video communication terminal, MVC mobile video acquisition and communication terminal, FVC fixed video gather and communication terminal, VDR recording service device; This system relates to a kind of portable video acquisition and communication terminal and a kind of integrated desktop terminal merging conference terminal and PC display; It is characterized in that: as the terminal equipment of video directing or video conference, comprise commander or chairman, participant, by the rank and file in commander side or meeting, terminal equipment on any ICC of being registered in all can be used as conference member and participates in meeting directly, comprises video monitoring function component;
As the visual video directing terminal of ICC of commander or chairman role, take charge and the scheduling of meeting and Service control, comprise initiate composition meeting SIP calling, invite member's membership, agree to the data flow of other terminal retrieve for examination/adjust listen request, terminal, closing session that video image/conference voice of selecting needs to broadcast, the flow direction of control Media Stream, selection need video and audio recording; As the terminal equipment of commander or chairman, ICC is while collection local audio, also receive the audio frequency media bag from other-end equipment, be distributed to each conference member after carrying out intelligent stereo process by the media processing functional module of ICC inside, media processing functional module also needs to gather after local video and other multichannel TV news images of showing on ICC needs voluntarily are decoded and shows;
As meeting participant or staff officer role DVT desktop video communication terminal, there is the control authority to MVC, FVC video capture device, receive the control authority of the multiple paths of video images of ICC Push, and retrieve for examination other any video images by the mode of application, participate in the control authority of commander or session discussing; As the terminal equipment of conference member, DVT is while collection local audio, also receive the conference voice from distributing after ICC intelligence stereo process, media processing functional module through DVT inside carry out decoding broadcast, media processing functional module also need gather local video and voluntarily to ICC specify and through ICC forward, need other multiple paths of video images shown on DVT to decode after display;
Speedily carrying out rescue work on-the-spot by MVC, FVC of commander's corner look as being arranged on, being responsible for live audio, video to pass back to command centre or main meeting-place, accepting the phonetic order of commander side simultaneously and make corresponding action according to the order request that commander side sends; As the subordinate in command system with by the terminal equipment of command target, MVC, FVC are while collection local audio, also receive the conference voice from distributing after ICC intelligence stereo process, media processing functional module through MVC, FVC inside carries out decoding broadcast, media processing functional module also needs to gather the local video from scene, under ICC controls, send to ICC, be transmitted to relevant conference member terminal equipment by ICC according to commander or session logic;
The monitor video image of the compressed encoding that video monitoring function component MVC and FVC after ICC registration gathers, video directing/conference system can be entered without the need to implementing pre decoding, watch direct for monitoring image Push to relevant conference terminal by ICC, also can be applied for retrieving for examination monitoring image to ICC by SIP dialog by each terminal; Realize video conferencing system and video prison the organically blending of system thus;
MVC and FVC only supports unidirectional video image acquisition function, is video monitoring function component; And MVC and FVC also supports two-way voice communication function, participating in commander or meeting in voice communication mode, is again conferencing function component; This feature is also the mark that video conferencing system and video monitoring system organically blend;
The business model of video directing/meeting that system realizes thus, had both met the general character demand by commander side or sub-venue, and also can meet the individual demand individually by commander side or sub-venue; A few roads monitor video image/meeting-place video of specifying is carried out Push to the conference terminal of participant by commander or chairman, forces conference terminal to watch the video image of specifying, meets the general character demand by commander side or sub-venue thus; Meanwhile, individually by commander side or sub-venue according to the special circumstances of himself and peculiar demand, to ICC application retrieve for examination oneself outside by Push video image interested any can field picture or monitor video image; Like this, video directing/meeting can be more flexible, and participant each side carries out commander according to the multi-channel video of ICC Push and holds a conference or consultation or meeting, sub-venue or can be retrieved for examination other video image formation oneself flexibly by commander side suggestion after discuss in meeting;
Adopt the MVC terminal of wireless access technology, make to produce, the on-the-spot personnel that speedily carry out rescue work can move freely according to order command in certain wireless coverage; FVC fixed video gathers and communication terminal, can be fixedly installed on certain field position, makes corresponding action by the commander accepting commander side; MVC and FVC terminal, represents more clear for the situation at scene and passback flexibly, also makes system of the present invention, be not limited under being applied in working environment, truly realize video directing/convention business;
Described terminal equipment ICC, DVT, MVC, FVC, DVR are based on Session Initiation Protocol, and terminal equipment ICC, DVT, MVC, FVC have media and control and processing capacity; Terminal equipment ICC, DVT, MVC, FVC have media processing functional module, comprise audio frequency processing capacity module and video processing function module, and complete the synchronous of its meeting remixed audio received and meeting/monitor video voluntarily by terminal; Whole terminal equipment ICC, DVT, MVC, FVC, DVR are integrated with SIP communication module, can complete call connection and media flow transmission by Session Initiation Protocol under the control of ICC;
Described system based on soft-exchange construction, using Session Initiation Protocol as call control protocol, the many groups SIP session between video directing or video conference being resolved to by multiple component of a system.
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| US20040008249A1 (en) * | 2002-07-10 | 2004-01-15 | Steve Nelson | Method and apparatus for controllable conference content via back-channel video interface |
| JP4502721B2 (en) * | 2004-06-16 | 2010-07-14 | 日本電信電話株式会社 | Video conference terminal device and system and method |
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| CN1411278A (en) * | 2002-11-25 | 2003-04-16 | 北京邮电通信设备厂 | IP network TV conference system |
| CN101039409A (en) * | 2007-04-04 | 2007-09-19 | 中兴通讯股份有限公司 | System and method for recording/replaying audio and video of multimedia conference |
| CN101198029A (en) * | 2007-04-13 | 2008-06-11 | 东华大学 | Remote video monitoring system and method based on soft commutation |
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