CN102209230A - Video conference system with main venue control module - Google Patents
Video conference system with main venue control module Download PDFInfo
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Abstract
The invention discloses a video conference system with a main venue control module. The video conference system consists of a core processing module, the main venue control module and parallel sessions of various regions. The main venue control module is connected with the core processing module. The core processing module is connected with the parallel sessions of various regions by an Internet protocol (IP) network. In the invention, the video conference system is fused with service flows of users and office automation systems so as to realize the complete functions of the video conference system. When the video conference system is required to expand new functions, the new functions can be developed by using the core control module and realized by product interfaces. The video conference system constructs the control system for a main venue of a video conference to integrate equipment lines of the venue, enable the line equipment to highly-efficiently cooperatively work, realize the functions of audio and video signal line control, venue equipment centralized control and the like, optimize the effects of the video conference and greatly improve the efficiency of the video conference.
Description
Technical field
The present invention relates to the telecommunication technique field, relate in particular to a kind of video conferencing system with main meeting-place control module.
Background technology
Along with the continuous lifting of real time communication demand in recent years, video conferencing system becomes the main execution mode of current multi-point remote meeting with advantages such as its high efficiency and visualitys.Video conference is when guaranteeing good meeting communication effectiveness, and the cost of having saved the personnel participating in the meeting has improved the efficient of business administration and decision-making.Video conferencing system is disposed convenient and can be realized data integration, owing to can hold a meeting, has effectively controlled cost expenses such as transport cost simultaneously between remote.In actual applications, possess many advantages such as hold a meeting just whenever and wherever possible, make video conferencing system obtain extensive approval.
Yet, in the actual application of commercial running video conferencing system, frequent day by day along with the meeting demand, parliamentary dimension constantly enlarges, and the conference system frequency of utilization is constantly soaring, and personnel participating in the meeting's quantity constantly increases; At this moment, the functional requirement of video conferencing system is more comprehensive, and it is particularly important that the stable performance type also seems.In the video conferencing system of on market, having used at present, when finishing basic function, be difficult to functions such as flow monitoring, self-service group of meeting, behavior records integratedly, and can't satisfy the demand of the new function of system.
Meanwhile, follow the video conference place function diversity to obtain popularizing rapidly, application such as on-the-spot meeting, training and teaching, multifunctional hall are integrated, and conference facilities such as slide projector, projector, video recording video reproduction equipment, public address equipment are introduced video conference place in a large number.But operating personnel often can not only just make these equipment high efficiency collaborative works by shirtsleeve operation in conference process; non-professional operating personnel usually can be in a rush because of the control as required of the frequent switching of various kinds of equipment, environment; so not only reduced meeting efficient, returned the confidentiality of meeting and bring problems.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of video conferencing system with main meeting-place control module is provided.
The objective of the invention is to be achieved through the following technical solutions: a kind of video conferencing system with main meeting-place control module, video conferencing system is made up of core processing module, main meeting-place control module and various places sub-venue; The main meeting-place control module links to each other with core processing module, links to each other by IP network between core processing module and the various places sub-venue; Wherein, core processing module is mainly linked to each other by netting twine each other by multipoint control unit, recorded broadcast equipment, computer; The main meeting-place control module comprises: system, large screen display system, centralized control main frame, medium matrix, AV matrix, VGA matrix, power supply and system's accessory are taken the photograph in cabled digital meeting desktop speech system, wireless Table top type speech unit, sound equipment sound reinforcement system, video record; Wherein, cabled digital meeting desktop speech system, sound equipment sound reinforcement system, large screen display system, medium matrix, AV matrix, VGA matrix, power supply and system's accessory link to each other with the centralized control main frame respectively, cabled digital meeting desktop speech system links to each other with the medium matrix respectively with wireless Table top type speech unit, and the medium matrix links to each other with the sound equipment sound reinforcement system respectively with the AV matrix; System is taken the photograph in AV matrix, video record, the VGA matrix links to each other successively with large screen display system.
Further, described core processing module is connected with each other by multipoint control unit, recorded broadcast equipment and computer and forms; The described cabled digital meeting desktop system of making a speech mainly is connected to form successively by conference host, splitter and wired speech machine; Described wireless Table top type speech unit is connected to form by wireless Table top type microphone and wireless microphone receiver; Described sound equipment sound reinforcement system is made up of sound console, DVD player, MD machine, main sound box, Ceiling loudspeaker housing, active audio amplifier, DVD player, MD machine, main sound box, Ceiling loudspeaker housing, active audio amplifier link to each other with sound console respectively, sound console, DVD player, MD machine link to each other with the AV matrix respectively, and main sound box, Ceiling loudspeaker housing, active audio amplifier link to each other with the medium matrix respectively; Described video recording system mainly is connected to form successively by video camera, DVR and monitor; Described large screen display system is made up of VGA distributor, plasma display, band splicing video card computer, projector, and wherein, the VGA distributor links to each other with plasma display, and band splicing video card computer links to each other with projector.The invention has the beneficial effects as follows,
1, and the problem that be difficult to expand strong at video conferencing system function applicability, the present invention develops each equipment interface of system, video conferencing system and user service flow journey, the office automation system are merged, realized the video conferencing system full functionality; And when video conferencing system need be expanded new function, can use kernel control module to carry out new functional development, and realize function by the product interface.
2, make the various device can not central controlled problem at the application form increase of video conference main meeting-place, the present invention is directed to the video conference main meeting-place and build control system, will the field device circuit integrated and make its efficient collaborative work, realize functions such as the control of video-audio signal circuit, meeting field device centralized control, optimize the video conference effect, increased substantially the efficient that video conference is carried out.
Description of drawings
Fig. 1 is video conferencing system overall framework figure;
Fig. 2 is core processing module overall framework figure;
Fig. 3 is multipoint control unit (MCU) overall architecture block diagram;
Fig. 4 is multipoint control unit (MCU) interface block diagram;
Fig. 5 is each functional module workflow diagram of multipoint control unit;
Fig. 6 is a computer architecture level block diagram;
Fig. 7 is the computer operation flow chart;
Fig. 8 is a main meeting-place control module frame diagram;
Fig. 9 is cabled digital meeting desktop speech system structural framework figure;
Figure 10 is sound equipment sound reinforcement system structural framing figure;
Figure 11 is video recording system structural framework figure;
Figure 12 is large screen display system structural framing figure;
Figure 13 is various places sub-venue video conference terminal equipment structure charts;
Figure 14 is HDX 9002 external interface schematic diagrames;
Figure 15 is video and audio data transport stream journey figure.
Embodiment
The present invention proposes a kind of video conferencing system with main meeting-place control module, at the deficiency in the existing video conferencing system, on the one hand, use possesses the device build video conferencing system of each function, achieve the fusion of the multiple function of system, and can expand new function for system as required in the future; On the other hand, build the control system of video conference place, will the field device circuit integrated and make its efficient collaborative work, realize the control of video-audio signal circuit, can the field device centralized control etc. functions, optimize the video conference effect, increased substantially the efficient that video conference is carried out.
As shown in Figure 1, video conferencing system is made up of core processing module, main meeting-place control module and various places sub-venue.The main meeting-place control module links to each other with core processing module, links to each other by IP network between core processing module and the various places sub-venue.
Wherein, core processing module is mainly linked to each other by netting twine each other by multipoint control unit, recorded broadcast equipment, computer.
The main meeting-place control module comprises: system, large screen display system, centralized control main frame, medium matrix, AV matrix, VGA matrix, power supply and system's accessory are taken the photograph in cabled digital meeting desktop speech system, wireless Table top type speech unit, sound equipment sound reinforcement system, video record; Wherein, cabled digital meeting desktop speech system, sound equipment sound reinforcement system, large screen display system, medium matrix, AV matrix, VGA matrix, power supply and system's accessory link to each other with the centralized control main frame respectively, cabled digital meeting desktop speech system links to each other with the medium matrix respectively with wireless Table top type speech unit, and the medium matrix links to each other with the sound equipment sound reinforcement system respectively with the AV matrix; System is taken the photograph in AV matrix, video record, the VGA matrix links to each other successively with large screen display system.
The various places sub-venue is made up of several sub-venues, and each sub-venue has a video conference terminal equipment.
Describe in detail with reference to the accompanying drawings below and respectively form module, it is more obvious that structure of the present invention and characteristics will become.
One, core processing module
As shown in Figure 2, core processing module is connected with each other and is formed by multipoint control unit, recorded broadcast equipment, computer.
1, multipoint control unit
Multipoint control unit is MCU(Multi Control Unit), be the hinge equipment of videoconference server end, realize that by multipoint control unit respectively the long-range of the unit of attending a meeting links to each other.Multipoint control unit can carry out cascade when unit user access service is provided, thereby is connected to become extensive multi-level video conference.
Multipoint control unit mainly is made up of inner function module and interface module.
As shown in Figure 3, the inner function module of multipoint control unit comprises audio processing modules, video processing module, data processing module and conference management and control module.Audio processing modules be responsible for connecting with the managing video meeting in the transmission of main meeting-place and sub-venue audio-frequency information, video processing module be responsible for connecting with the managing video meeting in the transmission of main meeting-place and sub-venue video information, data processing module is responsible for file sharing functionality in the video conference, and conference management and control module are in charge of and are safeguarded that meeting normally carries out.Conference management and control module support the function of audio processing modules, video processing module and data processing module to realize.Each functional module of the inside of core processor links to each other with external interface respectively.
As shown in Figure 4, the function of the interface module of multipoint control unit is mainly realized by fpga chip, order maker and the RS232 interface of 74LS245 chip, 8031 chips, address decoding, input FIFO and output FIFO.In the inside of core processor, link to each other respectively with audio processing modules, video processing module, data processing module and conference management and control module by each chip, guarantee the normal operation of the inner function module of core processor; In the outside of core processor, interface module links to each other with recorded broadcast equipment, computer and conference terminal equipment respectively, realizes the stable transfer of information.
The RMX 1016C serial model No. product that multipoint control unit can use U.S. Polycom Inc. (POLYCOM) to produce, but the present invention is not limited to this.RMX 1016C is the upgradeable IP network multipoint control unit of being released by the logical company of Poly of a high-performance, is made up of 16 video ports and 16 audio ports, supports H.323 and Session Initiation Protocol, realizes multipoint audio/video and the incorporate conference service of data content.
RMX 1016C supports the multiple spot multimedia bridge joint equipment standard that the ITU-T of standardization department of international telecommunication union telecommunication proposes, and the etsi standard of telecommunication product.The major function characteristic of RMX 1016C has:
(1) video, audio frequency and content are integrated, simple installation and be easy to administration configuration;
(2) support conference terminal, IP, SIP phone, mobile phone and analog telephone insert meeting;
(3) provide high-quality audio frequency and video and content to share.
(4) support 64Kbps to connect to the multiple speed of 4Mbps.
(5) guarantee that the ideal data when network state is not good transmits;
(6) support that Siren 22 is stereo;
(7) support H.264 double fluid;
(8) support 2000 incorporate procceedings tubulation reasons with Polycom RSS;
(9) adopt dynamic many split screens technology, select and the split screen layout for video conference provides various viewing, video-see has more flexibility;
(10) support high definition terminal and SD free terminal to be blended in the meeting, save the user and set up video conference cost input;
(11) support mutual (IVR, the Interactive Voice Response) function of interactive voice, make the participant in the meeting of holding, can carry out various operations according to voice suggestion.
Each functional module workflow of multipoint control unit as shown in Figure 5.At first, H.225 signaling, H.245 form the conference management functional module jointly with the GK module, build the operation basis of video conferencing system.Connect between multipoint control unit and each the meeting-place terminal then, set up video conference.In service in meeting, after receiving terminal sends the video/audio data,, make the video/audio data mixing and finish video exchange synthetic by mode of operation and video/audio data processing are set.The final processed video voice data that sends is to terminal.
2, recorded broadcast equipment
Recorded broadcast equipment is used for the file of video conferencing system video and voice data and reads, the RSS 4000 serial model No. products that can use U.S. Polycom Inc. (POLYCOM) to produce, but the present invention is not limited to this.RSS 4000 is applicable to the IP network video conferencing system, can realize that meeting records and function such as history file making, and can pass through the Streaming Media transmission and play meeting, makes full use of conferencing resource.
RSS 4000 provides two to record port, and maximum 100 WEB playback, 10 H.323 playback can be provided, and when supporting high definition 720P double fluid meeting synchronous recording, automatic high definition resolution archive data with 1080P.Its main performance has: video conference H series code stream direct recording, avoid secondary coding-decoding, the meeting of not damaged recording and playback; Support single-point, point-to-point and multipoint conference to record; Support H.323 double-current synchronous recording; Support the international high-definition image not damaged of 1280x720PHD to record; Recorded meeting source code flow and ASF form code stream allow conference terminal and computer playback of conferencing simultaneously; Support lively in real time, be convenient to meeting and enlarge live to desktop; Support the self-timing backup of recorded content; Support the ietf standard dtmf code, can realize that terminal, MCU control in real time; The control of POLYCOM MGC multipoint controller online in real time; Perfect document and subscriber authorisation, authentication management mechanism; The support multiple devices pile up, and are convenient to constitute the large-scale application system; Easy easy-to-use Chinese administration interface; Powerful application programming interfaces.
3, computer
Computer can use personal computer to realize.
Computer is finished the initial setting up of system's multipoint control unit by linking to each other with multipoint control unit; By linking to each other with recorded broadcast of session equipment, the data that can transfer video and voice data are filed; In addition, can realize the functions expanding of video conferencing system by computer.
Computer is finished the initial setting up of system MCU by linking to each other with MCU; By linking to each other with recorded broadcast equipment, the data that can transfer video and voice data are filed; In addition, can realize traffic monitoring function and behavior record search function, and can expand the function of video conferencing system by computer.
The computer operation structural frames as shown in Figure 6.Press the division of OSI seven layer model, the computer operation structure is divided into user interface, transmission information, connected mode, file storage from top to bottom and is connected with IP network.Wherein, transport packet is drawn together conference management, file transfer, Word message, video code flow and audio code stream, and connected mode comprises the data message and the video/audio information that is connected based on UDP that connects based on TCP; The data message that connects based on TCP docks conference management, file transfer, Word message, based on the video/audio information butt joint video code flow and the audio code stream of UDP connection.
Adopt the Browser/Server framework of standard in the computer operation, adopt the expandable mark language XML that transmits based on IP to communicate with MCU.The convener lands computer by the IE browser, initiates the meeting application.Computer is different from the direct communication of video conference terminal, but by the management to MCU, and then realize video terminal is carried out meeting control.The user interface of computer is used the java applet design, adopts Java name and directory interface (JNDI, Java Naming and Directory Interface) to connect database, passes through the C++ program with the driving of MCU and sends the XML instruction.The front-end and back-end of computer adopt TCP/IP to connect.
The workflow diagram of computer as shown in Figure 7.At first, before video conference begins, start kernel control module; Apply for adding meeting by the member then, the member's identification of at first attending a meeting adds if discern successfully then allow, otherwise newly-built user account; After member's adding system, confirm that it is as newly-built meeting of main frame or the existing meeting of adding.If the newly-built meeting of member then at first is provided with conference parameters, start meeting then, enter conference phase; If the member adds existing meeting, then directly enter conference phase.After entering conference phase, send the instruction of meeting separately by each member, until meeting adjourned.
Two, main meeting-place
As shown in Figure 8, the main meeting-place control module is mainly by cabled digital meeting desktop speech system, wireless Table top type speech unit, sound equipment sound reinforcement system, system, large screen display system are taken the photograph in the video record, centralized control main frame, medium matrix, AV matrix, VGA matrix, and power supply and system's accessory are formed.
Wherein, cabled digital meeting desktop speech system, wireless Table top type speech unit, sound equipment sound reinforcement system have been formed audio-frequency module, system is taken the photograph in the video record, large screen display system has been formed video module, centralized control main frame, medium matrix, AV matrix, VGA matrix have been formed central control system, and central control system, power supply and system's accessory have been formed the meeting-place control module.
Except that being connected by infrared port between centralized control main frame and the AV matrix, all connect between all the other each equipment by cable.
1, cabled digital meeting desktop speech system
Cabled digital meeting desktop speech system mainly is connected to form successively by conference host, splitter and wired speech machine.Wherein, conference host can be used the DCN-CCUB serial model No. product of being produced by company of German Bosch (BOSCH), splitter can use the LBB4114/00 serial model No. product of being produced by company of German Bosch (BOSCH), wired speech machine can use the DCN-DISS serial model No. product of being produced by company of German Bosch (BOSCH), but the present invention is not limited to this.
The spokesman when enabling video and follow of the cabled digital meeting desktop speech system shooting function of talking traces into the spokesman fast, and the automatic switchover image.System is easy to connect, easy disassembly.
Cabled digital meeting desktop speech system structural framework as shown in Figure 9.Conference host connects splitter 1 and splitter 2, and splitter 2 connects splitter 3 and splitter 4, and each splitter connects wired speech machine.
2, wireless Table top type speech unit
Wireless Table top type speech unit is connected to form by wireless Table top type microphone and wireless microphone receiver.Wherein, the WX-R800 serial model No. product that the WX-4600 serial model No. product that wireless Table top type microphone can use MAT (Panasonic) to produce, wireless microphone receiver can use MAT (Panasonic) to produce.
Wireless Table top type speech unit is the expansion of cabled digital meeting desktop speech system, and two systems realize video conference place sound input function jointly.
3, sound equipment sound reinforcement system
The sound equipment sound reinforcement system is made up of sound console, DVD player, MD machine, main sound box, Ceiling loudspeaker housing, active audio amplifier, DVD player, MD machine, main sound box, Ceiling loudspeaker housing, active audio amplifier link to each other with sound console respectively, sound console, DVD player, MD machine link to each other with the AV matrix respectively, and main sound box, Ceiling loudspeaker housing, active audio amplifier link to each other with the medium matrix respectively.Wherein, sound console can use the MultiMix 16 FireWireT serial model No. products that U.S. ALESIS company produces; The MDS-JE480 serial model No. product that the DVP-NS50P serial model No. product that DVD player can use Sony corporation of Japan (SONY) company to produce, MD machine can use Sony corporation of Japan (SONY) company to produce; The CONTROL29AV serial model No. product that main sound box can use U.S. JBL, Inc. to produce, the EON-10-G2 serial model No. product that the WS502 serial model No. product that Ceiling loudspeaker housing can use U.S. PEAVEY company to produce, active audio amplifier can use U.S. JBL, Inc. to produce.
The sound equipment sound reinforcement system is the part of video conference place voice output.
Sound equipment sound reinforcement system structural framing as shown in figure 10, sound console connects DVD/MD machine and stereo set respectively, wherein stereo set comprises meeting-place main sound box, Ceiling loudspeaker housing and active audio amplifier.The effect of sound console is the volume and the audio-video output parameter of each audio output device of working control.
4, video recording system
The video recording system mainly is connected to form successively by video camera, DVR and monitor.Wherein, BRC-300P and EVI-D70P serial model No. product that video camera can use Sony corporation of Japan (SONY) company to produce, the DH-DVR0404RW serial model No. product that DVR can use the big magnificent company of China to produce, the LC-TM1508S serial model No. product that monitor can use company of Chinese Konka to produce.
The video recording system passes through video camera can walk about to the meeting indoor occupant, and meeting scene etc. is monitored, and can pass through DVR and be recorded a video in the meeting scene in good time.
The video recording system structural framework as shown in figure 11.At first, video camera connects DVR, with the video of the shooting with video-corder backup of filing in DVR, in order to minutes with the inquiry of transferring the files later on.DVR transfers to video in the monitor more then, plays real-time video for conference management attendant monitoring by monitor.
5, large screen display system
Large screen display system is made up of VGA distributor, plasma display, band splicing video card computer, projector, and wherein, the VGA distributor links to each other with plasma display, and band splicing video card computer links to each other with projector.Wherein, the P/2 DA4 xi serial model No. product that the VGA distributor can use U.S. EXTRON company to produce, the TH-42PWD8CK serial model No. product that plasma display can use MAT (Panasonic) to produce, the P650 serial model No. product that band splicing video card computer can be produced Canadian Matrox company is installed on two personal computers realizes the PB80X serial model No. product that projector can use Minnesota Mining and Manufacturing Company to produce.
Band splicing video card computer in the large screen display system connects two projectors by the DVI data transmission cable and does demonstration, can singly shield demonstration and also can show the same picture simultaneously by two screens, can also only do demonstration with a projector; But simultaneously transmission of video, VGA signal in the projector.
Projection Display function in the large screen display system is to be realized jointly by two rear projection screens and two projectors, the physical resolution of projector is at 1024*768, ultimate resolution is 1280*1024, brightness is output as 4500ANSI, contains multiple input interfaces such as COMPUTER, component vide, VIDEO, S-VIDEO, 15-PIN analog rgb.The plasma display system is made up of 7 49 cun removable plasma.
The large screen display system structural framing as shown in figure 12, video can be play in plasma display and projector.The transmission line from information source to plasma display, video information is at first imported the VGA distributor into, by the VGA distributor high-definition video signal is passed to plasma display and shows.The transmission line from information source to projector, at first video information transfers in the computer of band splicing video card, is shown jointly by projector 1 and projector 2 then.
6, central control system
Centralized control main frame, medium matrix, AV matrix, VGA matrix are formed central control system.Wherein, the NI-3000 serial model No. product that the centralized control main frame can use U.S. AMX company to produce, the DIGITOOL MX serial model No. product that the medium matrix can use U.S. PEAVEY company to produce, MAV128 RCA, MVX84 VGA (A) serial model No. product that AV matrix, VGA matrix can use U.S. EXTRON company to produce respectively, but the present invention is not limited to this.
Centralized control main frame NI3100 can be to the unified control of equipment such as light, microphone, sound equipment, video camera, DVD, MD, projector.
The signal switching comprises that video switch and Computer signal switch.DVD is presented at its vision signal in the projector by the switching of video matrix, and the video matrix model of use is 12 to advance 8 and go out the AV matrix switcher.The interface of this video matrix comprises composite video and stereo audio, and capacity is 12 tunnel inputs, 8 tunnel outputs, and audio frequency can be independent of video switch and also can compoundly export.
Central control system is by linking to each other with each system module, can regulate the switch of equipment such as meeting room DVD player and MD machine, projector, the switching of the audio-video signal of gating matrix, the adjusting of control medium matrix volume, the control of video camera, the image demonstration that video is followed etc.
7, power supply and system's accessory
Power supply and system's accessory can be selected corresponding accessory according to each unit type.
After finishing the overall architecture of video conference place control system of the present invention, each module of video conference place control system of the present invention and equipment subordinate relation are as shown in the table.
Three, various places sub-venue
As shown in figure 13, various places sub-venue video conference terminal equipment is made up of analog-to-digital converting module, audio input device, video input apparatus, audio output apparatus, picture output device.
Wherein, video input apparatus, picture output device, audio input device, audio output apparatus are collected the video of meeting and audio signal and are play respectively from the meeting-place, the effect of analog-to-digital converting module is that the analog signal conversion with video and audio frequency is a digital signal confession Network Transmission.
1, analog-to-digital converting module and video input apparatus
The HDX 9002 serial model No. products that analog-to-digital converting module and video input apparatus can use U.S. Polycom Inc. (POLYCOM) to produce.
As shown in figure 14, HDX 9002 each interface function are:
| Video output 1 | The BNC and the DVI that are used for master monitor |
| Video output 2 | The BNC and the DVI that are used for auxiliary |
| Video output | |
| 3 | Be used for calling is recorded to the BNC of videocorder/DVD |
| Video input 1 and 2 | The HDCI that is used for video camera 1 and video camera 2 |
| |
Videocorder/DVD is used for the BNC of in calling play content |
| Video input 4 | Be used for playing the DVI of the content on the computer in calling |
| Audio frequency input 1 | The Phoenix that is used for the input of microphone or circuit |
| |
The Phoenix that is used for videocorder/DVD player audio frequency |
| Audio frequency output 1 | The Phoenix that is used for master monitor video or external speaker system |
| |
The Phoenix that is used for videocorder/DVD player audio frequency |
| The analog telephone port | Being used for analog telephone calls out |
| The RS-232 serial port | Be used for RS-232 equipment |
| IR | The Phoenix that is used for IR recipient |
| The LAN port | Be used for calling out or SIP calling, People+Content IP and Polycom HDX Web interface |
| Power interface | Be used for power supply |
2, audio input device
The DCN-DISS serial model No. product that audio input device can use company of German Bosch (BOSCH) to produce.
The DCN-DISS product has fixedly the discussion device of microphone can be made the participant make a speech, register speaking request and listen to other people speech, and microphone handle can stretch flexibly.In addition, this device also provides the two-way earphone to connect, even under the very noisy situation of background sound, also can not hear other people speech.Boombox will be quiet when microphone is opened, in case produce acoustic feedback.This device both can be used as the representative device, also can be used as chairman's device.Characteristic and advantage have: the susceptibility that mobile phone is disturbed is lower; Boombox; Reduce earphone output rank in case produce acoustic feedback; Can be as representing device or chairman's device; The earpiece volume control button; Concealed " De-init " switch; Six pin cylindrical connectors are used to carry out loop and connect.
3, picture output device and audio output apparatus
The TH-42PH10CK serial model No. product that picture output device can use MAT (Panasonic) to produce.Audio output apparatus can use common loudspeaker box device.
The video of video conferencing system and voice data flow process are as shown in figure 15.The video/audio data flow of video conferencing system is distinguished according to meeting-place end and server end.At the meeting-place end, begin to send video/audio transmission request behind the connection video server, obtaining confirming that the back adds conference group, the meeting-place end began to accept the compressed video audio code stream after meeting began, and afterwards code stream was carried out decompress(ion).At server end, at first the opening entry audio-frequency information is accepted the video/audio transmission request that client sends then, adds conference group thereby send the conference group address by IP network, after meeting begins, send the compressed video voice data, unify decompress(ion) by the meeting-place end to the meeting-place end.
Claims (7)
1. the video conferencing system with main meeting-place control module is characterized in that, video conferencing system is made up of core processing module, main meeting-place control module and various places sub-venue etc.; The main meeting-place control module links to each other with core processing module, links to each other by IP network between core processing module and the various places sub-venue; Wherein, core processing module is mainly linked to each other by netting twine each other by multipoint control unit, recorded broadcast equipment, computer; The main meeting-place control module comprises: compositions such as system, large screen display system, centralized control main frame, medium matrix, AV matrix, VGA matrix, power supply and system's accessory are taken the photograph in cabled digital meeting desktop speech system, wireless Table top type speech unit, sound equipment sound reinforcement system, video record; Wherein, cabled digital meeting desktop speech system, sound equipment sound reinforcement system, large screen display system, medium matrix, AV matrix, VGA matrix, power supply and system's accessory link to each other with the centralized control main frame respectively, cabled digital meeting desktop speech system links to each other with the medium matrix respectively with wireless Table top type speech unit, and the medium matrix links to each other with the sound equipment sound reinforcement system respectively with the AV matrix; System is taken the photograph in AV matrix, video record, the VGA matrix links to each other successively with large screen display system.
2. according to the described video conferencing system of claim 1, it is characterized in that described core processing module is connected with each other by multipoint control unit, recorded broadcast equipment and computer and forms with main meeting-place control module.
3. according to the described video conferencing system of claim 1, it is characterized in that the described cabled digital meeting desktop system of making a speech mainly is connected to form successively by conference host, splitter and wired speech machine with main meeting-place control module.
4. according to the described video conferencing system of claim 1, it is characterized in that described wireless Table top type speech unit is connected to form by wireless Table top type microphone and wireless microphone receiver with main meeting-place control module.
5. according to the described video conferencing system of claim 1 with main meeting-place control module, it is characterized in that, described sound equipment sound reinforcement system is made up of sound console, DVD player, MD machine, main sound box, Ceiling loudspeaker housing, active audio amplifier etc., DVD player, MD machine, main sound box, Ceiling loudspeaker housing, active audio amplifier link to each other with sound console respectively, sound console, DVD player, MD machine link to each other with the AV matrix respectively, and main sound box, Ceiling loudspeaker housing, active audio amplifier link to each other with the medium matrix respectively.
6. according to the described video conferencing system of claim 1, it is characterized in that described video recording system mainly is connected to form successively by video camera, DVR and monitor with main meeting-place control module.
7. according to the described video conferencing system of claim 1 with main meeting-place control module, it is characterized in that, described large screen display system is made up of VGA distributor, plasma display, band splicing video card computer, projector, wherein, the VGA distributor links to each other with plasma display, and band splicing video card computer links to each other with projector.
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