CN102065264A - 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 technical field, relate in particular to the no MCU distributed video method for stream processing in video directing/conference system, and support the video conference that multi-channel video Push combines with the application of single channel video and the application model of video monitoring combination, also relate to a kind of portable video acquisition and communication terminal and a kind of integrated desktop terminal that merges conference terminal and PC display.
Background technology
Follow the industry user to raise the management level, promote the development trend of safe production awareness, how to cut operating costs, increase work efficiency, strengthen the interdepartmental contact in strange land, guarantee that the higher level displays gradually to problems such as the clear understanding of subordinate's operational environment and working condition, the quick location that promotes case of emergency and solutions, traditional video conference and video monitoring system all can't satisfy this type of demand of user, and video directing/conference system arises at the historic moment thus.
Video directing/conference system is to expand on the basis of independently video conference, video monitoring system, video communication applications system with video conference, video monitoring organically combine carries out specific aim optimization at existing video conference, video monitoring in conjunction with the problem that application mode exists.
Because video conference, video monitoring are two cover systems independently, the pattern of therefore video conference, video monitoring system combination normally will be carried out inserting video conference terminal behind the pre decoding from the monitoring video flow (compressed encoding) of video supervisory control system, MCU is configured to the monitoring video flow (pre decoding) of supervisory control system in the video conference as one tunnel virtual video conference terminal, and by MCU control of video conference terminal this road monitor video image other conference terminals in the meeting-place are broadcasted, realize combining of video conference and video monitoring thus.
Present this pattern is because it is in conjunction with the intrinsic deficiency that realizes, can only be to broadcast to the conference terminal of prior setting by certain road monitor video image that the chairman will fix, caused system applies pattern fixed single, can only realize that sub-venue watches certain road monitor video of fixing that main meeting-place or chairman select.Watching outside the monitor video image of appointment when some sub-venues or a plurality of sub-venue, when also wishing to watch other monitor videos according to self concrete condition, existing pattern then can't satisfy user's demand.And in the 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 has just determined 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 replacing or the cascade of MCU.The high price of MCU itself comprises that dilatation causes changing or cascade MCU means the high investment that the user pays for this reason, and it is poor also to mean based on its extension of network of video conferencing system of MCU system, can only dilatation in the port arrangement scope of MCU.
Aspect from user's operation, existing pattern complex operation, before beginning, meeting needs to be familiar with the meeting operating personnel of systems soft ware hardware, system is carried out corresponding setting, comprise conference member editor, transmission network parameter configuration etc., also need distal portion meeting-place personnel to cooperate simultaneously and carry out the debugging of sub-venue conference terminal.A kind of so specialized use pattern makes the user to resemble to use at any time the familiar dialing professional.
In sum, the inherent shortcoming of existing pattern has caused the industry user in the face of its distinctive production scheduling, emergency repair commander, long-range holding a conference or consultation etc. during individual demand, adopts existing system not meet consumers' demand, and disposes and use all inconvenience.
This patent is based on the SIP communication protocol of present application maturation, video directing/conference system the solution of the no MCU that proposes, no stand-alone application server, non-multicast formula, can be good at addressing the above problem, under the command scheduling in industry user unit's scope, emergency repair, long-range applied environment such as hold a conference or consultation in application advantage obvious.
Summary of the invention
The objective of the invention is to overcome the shortcoming of existing application model,, provide a kind of video directing/conference system solution and media processing method thereof based on the SIP standard.Native system need not MCU, does not also need the stand-alone application server of standard soft-exchange construction, and terminal plug and play, system deployment are quick, user's convenient and reliable operation.And do not need the bottom transmission network to support multicast pattern, can effectively protect the investment of user's 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:
1.ICC visual video directing terminal has meeting or commander's control authority, is equivalent to chairman or commander's role, participates in command scheduling and meeting control directly; Can there be a plurality of ICC in system, there are differences on commanding power and configuration management authority between main ICC and other inferior grade ICC;
2.DVT the desktop video communication terminal has certain commander's control authority (mainly being the control authority to video capture device), is the identity participant with consultant's (all can hear) but more, is the participant of meeting;
3.MVC mobile video acquisition and communication terminal are the subordinate in the command system, be responsible for accepting the commander of commander side and corresponding action is made in the order that the side of commander sends; MVC adopts wireless technology, and the on-the-spot personnel that make to produce, speedily carry out rescue work can move in certain wireless coverage, thereby the situation with the scene of helping is more clear and represent flexibly;
4.FVC fixed video collection and communication terminal are the subordinate in the command system, commander's (camera lens zooms out, rotation etc.) that its video capture device can be accepted the side of commander makes corresponding action; FVC can only be fixedly installed on certain field position;
5.VDR video recording server
Annotate: the bi-directional communication function of MVC, the equal support voice of FVC
MVC and FVC are the components of a system that the video monitoring subfunction relates to, and are finished the on-the-spot unidirectional acquisition function of monitoring image such as production scheduling, emergency repair by it; Simultaneously its also bi-directional communication function of support voice had both been supported point-to-point voice communication, also supported the meeting-place audio-frequency information decoding from behind the ICC intelligence audio mixing that will receive to play.In this sense, MVC, FVC also are conference terminals, embody the fusion of video monitoring function and video conference function thus.The video image that MVC and FVC gathered (compressed encoding), need not to implement pre decoding and can enter the video directing system, only need MVC, FVC watch the direct Push of monitoring image can for relevant conference terminal, also can retrieve for examination monitoring image by the SIP dialog application by each terminal at ICC registration back ICC.As seen, in technical scheme of the present invention, video monitoring system and video conferencing system have realized organically blending, and MVC, FVC have become organic member of video directing/video conferencing system.
SIP module that each component inside of system is integrated, adopt the standard Session Initiation Protocol as call control protocol mutually, video directing or video conference are resolved between a plurality of ICC, and the SIP session between ICC and MVC, FVC, the terminal equipments such as DVT, VDR, every group session carries out call treatment and media negotiation work independently by the associated components that participates in session is distributed.System's each member (referring to ICC, DVT, MVC, FVC) except that VDR has media processing units, comprises audio processing modules and video processing module.Each member at first carries out the time stamp mark after gathering local audio information and video information, transmission enters in the grid respectively then, finishes audio/video synchronization and medium processing voluntarily by receiving terminal.
ICC has meeting or commander's control authority, is equivalent to chairman or commander's role, participates in command scheduling and meeting control directly.The commanding power of ICC and meeting control authority are meant that the data flow of initiating commander's meeting, determine commander's conference member, agreeing other terminal is retrieved for examination/transferred and listen request, need to select the authorities such as video image/conference voice that broadcast.DVT then control authority is less relatively, mainly is the control authority to video capture device, and mostly is to command with consultant's's (all can hear) identity participation.
ICC control meeting begins, after calling and called in the related many groups SIP session of 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 of its collection is sent to main ICC, are responsible for carrying out intelligent audio mixing with main ICC local audio and from the audio frequency of other conference member by main ICC.Commander/conference audio after audio mixing is synthetic is play behind the audio decoder by conference member voluntarily by the conference member broadcasting of main ICC control to appointment.ICC can control certain conference member, shields its meeting speech or block it to receive conference audio after synthetic.Audio frequency behind the audio mixing sends to the VDR preservation of recording.See accompanying drawing 2 for details.
The video processing module of main ICC, inferior grade ICC, DVT, MVC, FVC is responsible for gathering local video image, and under commander's control of ICC, all issue main ICC by the bottom data network, but handle on the road of closing without ICC, but directly be transmitted to the correlation reception terminal by main ICC according to commander/session logic.ICC can control the video way of (receive and transmit), and promptly the meeting capacity of system of the present invention can reach more than 64 sides; But the quantity of the conference member that ICC can manage (comprising video monitoring) is far longer than the number formulary that it can be handled.Further, the video flowing distribution has two kinds of patterns.A kind of pattern is that ICC is according to commander or meeting needs, the multi-channel video image that need share with each conference terminal or discuss (can be the monitor video of multichannel from MVC, FVC, also can make meeting-place video from ICC and DVT), Push gives the participant terminal by force.By the multi-channel video of Push, directly be transmitted to receiving terminal by main ICC.Second kind of pattern is the participant terminal, based on its on-the-spot special circumstances, need the personalized a certain road video of retrieving for examination (can be monitor video outside by the multi-channel video of Push, also can be the meeting-place video), at this moment can be to ICC application and after ICC agrees, this road application video of retrieving for examination separately 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 by this receiving terminal back of decoding voluntarily.The video that need record a video is specified the back to be transmitted to VDR by main ICC by ICC and is recorded preservation.See accompanying drawing 3 for details.
Compared with prior art, the present invention is based on soft-exchange construction, with Session Initiation Protocol as call control protocol, integrated SIP module in each component of a system, commander or convention business logic are set control by ICC visual command control desk, video directing or video conference are resolved to the many groups SIP session between a plurality of components of a system, and the combination of organizing the SIP session is exactly a video directing or video conference more.On system architecture, there is not an independently application server in the present invention.On medium were handled, Media Stream control was finished by ICC, and the tupe of Media Stream is: audio medium stream is handled and is adopted ICC to concentrate the processing policy that sends behind the audio mixing; Video media stream is handled and has then been adopted the framework of End-to-End (end-to-end), main ICC chooses each relevant conference terminal of meeting according to the meeting needs, each relevant conference terminal sends to main ICC with its local video Media Stream and converges, carry out video flowing by main ICC according to commander/session logic and transmit, video flow processing is then finished by conference terminals such as ICC, DVT are distributed voluntarily.The picture displaying contents of main ICC (comprising monitor video and meeting-place video) is chosen according to the meeting needs voluntarily by main ICC, also can its display of video content of temporary changes in the meeting; By ICC control, picture display layout is then adjusted by terminal the picture displaying contents of main ICC control inferior grade ICC, a plurality of DVT (comprising the video of Push and the video that the independent application of terminal is retrieved for examination) voluntarily.
The whole system framework has adopted the full distributed framework of no MCU, no application server, makes system deployment simple, quick, and whole system cheap greatly expanded the applied environment of system.And compare common network teleconference system, power system capacity scale of the present invention has the order of magnitude to promote, and adopts present mainstream configuration PC, can reach the above meeting of 64 sides, can satisfy fully the industry user for emergency command speedily carry out rescue work, the demand of production scheduling etc.And the deployment of system does not need the upgrading of bottom data transmission network to support multicast pattern, has effectively protected the development of infrastructure network investment in user's early stage.
From function of the present invention, ICC Push multichannel meeting-place and monitor video image are retrieved for examination video image outside the Push image, the combination of two kinds of patterns with the sub-venue application, make the present invention when fast satisfying most meeting-place general character demand, can also satisfy the individual demand of sub-venue.
From the daily operation and maintenance of user, the components of a system such as ICC, DVC, MVC, FVC, DVR, as long as can support plug and play on the net at the interior of user, and all components of a system such as ICC, DVC, MVC, FVC, DVR all are connected with network with the RJ45 Ethernet interface, the user uses as simple as the dialing, makes that user's operation and maintenance is simple.The migration of terminal also need not to be configured modification.
Description of drawings
Figure 1 shows that each member SIP call model figure of system
Figure 2 shows that the system audio transaction module figure that adopts 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:
The instance system simplified model as shown in Figure 1, suppose that participant side is ICC commander side (A), participant DVT1 (B), participant DVT2 (C), live video is gathered and communication terminal MVC (D), fixed in place video acquisition and communication terminal FVC (E), video recording server DVR (F).Wherein A, B, C, F are positioned at the user location of handling official business, field position such as D, E are positioned at commander, speedily carry out rescue work, disaster relief.The commander of each terminal or meeting authority be, A, B, C all can make a speech and discuss and visible video, D discussions of can making a speech, and E does not participate in commander and discusses and only upload fixed in place and monitor audio frequency and video.The video of DVR video and audio recording is from A, B, C, D.Then the detailed step of video directing/video conference of the present invention (flow chart is referring to Fig. 2 and Fig. 3) is:
1.ICC, after DVT, MVC, FVC, the DVR start,, all register at ICC by Session Initiation Protocol.The ICC that ICC relates to meeting, DVT, MVC, FVC, DVR member carry out authority setting: A, B, C is an 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).The ICC of command centre selects 5 road videos such as A, B, C, D, E all are presented at its this locality, to and come and force Push to give two conference members of B, C of participant from the three tunnel commander/meeting videos of A, B, C, jointly the monitor video image of speedily carrying out rescue work from the scene of D be held a conference or consultation from the monitor video of D.B is in order further to understand field condition, outside watching 4 road videos of Push, retrieves for examination fixed in place monitor video from E separately to the A application.The decision instruction that forms is speedily carried out rescue work to the scene or dispatcher D with the mode laxative remedy of phonetic order through holding a conference or consultation.F is to the preservation of recording a video from the audio frequency and video of A, B, C, D.
2.A, B, C, five terminals of D, E gather oneself local audio signal and vision signal separately, carry out the time stamp mark after, transmission entering in the grid respectively.
3. Audio Signal Processing: A, B, C, D, five terminals of E are gathered the local audio signal of oneself separately, and B, C, D, E send to A with the local audio signal of oneself through data network, carry out the intelligent meeting audio mixing after being converged by A.According to above-mentioned embodiment service logic, the commander behind the audio mixing/conference audio information sends to B, C, D (A oneself has the voice behind the audio mixing) simultaneously by A, is about to certainly play after the audio mixing audio frequency is decoded by B, C, D.E can only send local audio information because commander/session logic is set, and does not receive conference voice information.
4. vision signal is handled: A, B, C, D, five terminals of E are gathered the local video signal of oneself separately.According to detailed step 1, A selects to show (A, B, C, D, E five road videos) that then B, C, D, E all converge to A with its local video stream; Set according to the commander/session logic of this embodiment by A, A, C, D vision signal directly are transmitted to B, A, B, D vision signal directly are transmitted to C.A is from being about to B, C, D, E two-way commander/meeting vision signal and two-way on-site supervision decoding video signal, and together with the local video of A totally 5 tunnel screen images show; C is from being about to A, B two-way commander/meeting vision signal and D one tunnel on-site supervision decoding video signal, and together with the local video of C totally 4 tunnel screen images show.Except that accepting by 4 road videos of A Push (local video of A, C, D three road videos and C), B retrieves for examination monitoring image from E separately to the A application, and after A agreed, A was transmitted to B with the fixed in place monitor video of E.B is from being about to A, C two-way commander/meeting vision signal and D, E two-way on-site supervision decoding video signal, and together with the local video of B totally 5 tunnel screen images show.Video image displayed is from the meeting-place video of A, B, C with from the on-the-spot mobile video of D on the C terminal thus; Video image displayed is from the meeting-place video of A, B, C with from the on-the-spot mobile monitor video of D on the B terminal, and the B application fixed in place monitor video from E of retrieving for examination separately.A as the chairman of commanding or meeting than look, its authority can be retrieved for examination any meeting video and monitor video as required voluntarily, according to the previous examples system description, video image displayed is from the meeting-place video of A, B, C with from the live video of D, E on the A terminal; A can in meeting, increase (upper limit of total display video way be picture show that general layout 5+1 limited 6 the tunnel) or change in its local video image displayed.
5. commander/session recording, video recording: F is to the preservation of recording a video from the local video of A, B, C, D, E, and preserves meeting audio mixing audio frequency.
The above; only for the typical embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (10)
1. a video directing/conference system and method for not having MCU comprises: the visual video directing terminal of ICC, DVT desktop video communication terminal, MVC mobile video acquisition and communication terminal, the collection of FVC fixed video and communication terminal, the VDR server of recording a video.This system relates to a kind of portable video acquisition and communication terminal and a kind of integrated desktop terminal (ICC, DVT all can use this terminal, can replace the tabletop display of office PC) that merges conference terminal and PC display.The system that the present invention relates to, it is characterized in that: as the terminal equipment of video directing or video conference, comprise the rank and file in commander or chairman, participant, the quilt side of commander or the meeting, terminal equipment on any ICC of being registered in (ICC, DVT, MVC, FVC) all can be used as conference member and participates in meeting directly, comprises traditional video monitoring function member (MVC, FVC).
2. system according to claim 1, it is characterized in that, as the visual video directing terminal of commander or chairman role's ICC, take charge and the scheduling of meeting and professional control, the terminal that comprise that the SIP that initiate to form meeting calls out, invites member's affiliation, the video image/conference voice of listening request, selecting needs broadcasting is retrieved for examination/is transferred to the data flow of agreeing other terminal, the flow direction (from which terminal equipment, being transmitted to which terminal equipment) of controlling Media Stream, selection needs video and audio recording, closing session etc.; Terminal equipment as commander or chairman, ICC is when gathering local audio, also receive audio frequency media bag from other-end equipment, undertaken being distributed to each conference member after intelligent audio mixing is handled by the medium processing capacity module of ICC inside, medium processing capacity module also needs to gather local video and voluntarily other multichannel meeting video images that need show on ICC is decoded back the demonstration.
3. system according to claim 1, it is characterized in that, DVT desktop video communication terminal as meeting participant or staff officer role, has certain control authority (mainly being control authority) to MVC, FVC video capture device, but main is the multi-channel video image that receives ICC Push, and retrieve for examination other any video images by the mode of application, participate in commander or session discussing; Terminal equipment as conference member, DVT is when gathering local audio, also receive the conference voice of handling the back distribution from ICC intelligence audio mixing, through the broadcast of decoding of the medium processing capacity module of DVT inside, medium processing capacity module also need to gather local video and voluntarily to ICC specify (being Push) and through the ICC forwarding, need after other multi-channel video images that show on the DVT are decoded, show.
4. system according to claim 1, it is characterized in that, as the MVC, the FVC that are commanded the corner look that are arranged on scenes such as speedily carrying out rescue work, be responsible for live audio, video are passed back to command centre or main meeting-place, accept the phonetic order of commander side simultaneously and make corresponding action according to the order request that commander side sends; As the subordinate in the command system with by the terminal equipment of command target, MVC, FVC are when gathering local audio, also receive the conference voice of handling the back distribution from ICC intelligence audio mixing, through the broadcast of decoding of the medium processing capacity module of MVC, FVC inside, medium processing capacity module also needs to gather the local video from the scene, under ICC control, send to ICC, be transmitted to relevant conference member terminal equipment according to commander or session logic by ICC.
5. system according to claim 1, it is characterized in that, the monitor video image (compressed encoding) that video monitoring function member MVC and FVC after the ICC registration gathered, need not to implement pre decoding and can enter video directing/conference system, watch to relevant conference terminal the direct Push of monitoring image by ICC, also can retrieve for examination monitoring image by SIP dialog to the ICC application by each terminal.Realize organically blending of video conferencing system and video prison system thus.
6. system according to claim 4 is characterized in that, MVC and FVC only support unidirectional video image acquisition function, sees it is traditional video monitoring function member from this angle; And MVC and FVC also support two-way voice communication function, participate in commander or meeting in the voice communication mode, see and are traditional conferencing function members from this angle.This feature also is the sign that video conferencing system and video monitoring system organically blend.
7. according to claim 2,3,4,5,6 described systems, it is characterized in that, the business model of video directing/meeting that system realizes had thus both satisfied by the general character demand of commander side or sub-venue, also can satisfy individually by the individual demand of commander side or sub-venue.Commander or chairman carry out Push with a few roads monitor video image/meeting-place video of appointment to the conference terminal of participant, force conference terminal to watch the video image of appointment, satisfy thus by the general character demand of commander side or sub-venue; Simultaneously, individually by commander side or sub-venue special circumstances and peculiar demand, retrieve for examination by own interested any outside the Push video image to the ICC application and to understand field picture or monitor video image according to himself.Like this, video directing/meeting can be more flexible, and participant each side commands according to the multi-channel video of ICC Push and holds a conference or consultation or meeting, sub-venue or can be discussed in meeting after other video image forms oneself suggestion to retrieve for examination flexibly by commander.
8. system according to claim 4 is characterized in that, adopts the MVC terminal of wireless access technology, makes production, the on-the-spot personnel that speedily carry out rescue work (by the side of commander) to move freely according to order command in certain wireless coverage.The FVC fixed video is gathered and communication terminal, can be fixedly installed on certain field position, and the commander by accepting commander side (camera lens zooms out, rotation etc.) makes corresponding action.MVC and FVC terminal, more clear and passback flexibly represents with the situation at scene, also makes system of the present invention, is not limited to be applied under the working environment, truly realizes video directing/convention business.
9. system according to claim 1 is characterized in that, described terminal equipment (ICC, DVT, MVC, FVC, DVR) all is based on Session Initiation Protocol, and terminal equipment ICC, DVT, MVC, FVC have medium control and processing capacity.Terminal equipment ICC, DVT, MVC, FVC have medium processing capacity module, comprise Audio Processing functional module and video processing function module, and finish the synchronous of its meeting audio mixing audio frequency that receives and meeting/monitor video voluntarily by terminal.Described whole terminal equipment (ICC, DVT, MVC, FVC, DVR) all is integrated with the SIP communication module, can finish to call out under the control of ICC by Session Initiation Protocol to connect and media flow transmission.
10. system according to claim 9 is characterized in that described system based on soft-exchange construction,, as call control protocol video directing or video conference is resolved to the many groups SIP session between a plurality of components of a system with Session Initiation Protocol.
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