CN1540987A - Method for implementing multiplexing video communication in video conference system - Google Patents
Method for implementing multiplexing video communication in video conference system Download PDFInfo
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- CN1540987A CN1540987A CNA031133126A CN03113312A CN1540987A CN 1540987 A CN1540987 A CN 1540987A CN A031133126 A CNA031133126 A CN A031133126A CN 03113312 A CN03113312 A CN 03113312A CN 1540987 A CN1540987 A CN 1540987A
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Abstract
According to original H.320 protocol, first route of video steam completes interaction in speed of first route of video steam so as to obtain data of time slot used by the first route of video steam. Frame alignment is looked up at position of frame alignment sign FAS code corresponding to a time slot set behind time slot utilized by first route of video steam. Interaction of second route of video steam is carried out from beginning of first time slot after time slot utilized by the first route of video steam. Using the time slot being as first time slot of H.320 protocol carries out exchange of abilities. Corresponding frame alignment sign FAS code and bit allocation sign FAS are added into the time slot. Repeating above operation realizes communication in more routes of video stream.
Description
Technical field
The present invention relates to the multimedia messages communication field, the method for multi-channel video communication in particularly a kind of TV conference system.
Background technology
Video conferencing system is meant by existing various communication transmission mediums, multiple information such as static state/dynamic image of personage, voice, literal, picture are distributed on each user's computer, make that the user that disperses geographically can copolymerization one place, by multiple mode exchange of information such as figure, sound, increase the understandability of both sides to content.In current information society, TV conference system is widely used already.Particularly the video signal technology is accompanied by the development of video signal agreement, chip device, video signal transmission network and constantly develops.The video device of at present domestic and international main flow mostly adopts the international standard based on H series, mainly concentrates on H.320 series and H.323 series.Wherein, follow H.320 the video signal technology of agreement be mainly used in comprise E1, V.35, on the network based on circuit switching such as ISDN, follow the video communication network of this standard and video device and be subjected to those with characteristics such as its stability and, network line private network special uses abundant image quality is required height, emphasize the welcome of the colony of stability and reliability by property height, technical standard maturation, device category.In addition, the video signal transmission network that can use and ensure the quality of products in the world all adopts at present generally based on the video device of protocol technology H.320.But there is inferior position at the aspects such as price of the utilization of Internet resources, network more flexible, equipment based on the video signal technology of agreement H.320.
Scale along with the computer networking technology development and the deployment of broadband network; follow the H.323 video device of agreement and the main flow that video communication network becomes development gradually; this video signal technology mainly is based on the TCP/IP technology; the user can dispose video communication network rapidly on the data network of oneself, its network agile, easy for installation, safeguard simple.But the main weakness of present this technology show its based on the QOS problem of IP network be not well solved, have problems such as network jitter, bag preface confusion, network congestion, cause the stability of a system not high.
How to make full use of the advantage of existing H.320 protocol system, overcome the technology barrier that the every station terminal of protocol system H.320 is merely able to send out one road image, how H.320 to realize that second video flowing and even multi-path video stream are the problems that present the present invention need study and solve in the protocol system.
Summary of the invention
Technical problem to be solved by this invention provides the method for multi-channel video communication in a kind of TV conference system, makes to carry out H.320 the video conference communication system of agreement and can realize second video flowing and even multi-path video stream.
The present invention proposes a kind of method that realizes second video flowing and even multi-path video stream in protocol system H.320:
The first step: finish the mutual of first via video flowing with the speed of first via video flowing according to former H.320 agreement;
Second step: after the first step is finished, can obtain the used timeslot number of first via video flowing, FAS (the Frame AlignmentSignal of a certain setting time slot correspondence behind the used time slot of first via video flowing, the frame alignment mark) code position is sought frame alignment, if can find, then thinking has the second road video flowing;
The 3rd step: after defining the second road video flowing, first time slot behind the used time slot of first via video flowing begins to carry out the mutual of the second road video flowing, this time slot is carried out capabilities exchange as first time slot of agreement H.320, add corresponding FAS sign indicating number and BAS (Bit-rateAllocation Signal, position distribute labels) sign indicating number in this time slot;
The 4th step: repeat the operation in second step to the 3rd step, can realize more multi-path video stream;
Adopting the method for the invention, H.320 realizing second video flowing and even multi-path video stream in the protocol system, is to the H.320 innovation of protocol system.
Description of drawings
Fig. 1 is the time slot allocation of the improved two-path video stream in H.320 of the present invention, and preceding several time slots are first via video flowing, and the several time slots in back are the second road video flowing;
Fig. 2 is the time slot allocation of the improved multi-path video stream in H.320 of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Specify as follows to processing method of the present invention:
A kind of embodiment of the present invention, implementation step is as follows for two-path video circulation communication method for a kind of, and wherein the first via is a 768K speed, and the second the tunnel is 1152K speed:
The first step: mutual according to the ability that former H.320 agreement is finished first via video flowing with the 768K rate capacity;
Second step: after the first step is finished, can obtain the used timeslot number of first via video flowing is 12 time slots, first time slot behind the used time slot of first via video flowing, and promptly the FAS code position of the 13rd time slot correspondence is sought frame alignment, if can find, then thinking has the second road video flowing;
The 3rd step: after defining the second road video flowing, first time slot behind the used time slot of first via video flowing is that the 13rd time slot begins to carry out the mutual of the second road video flowing, the 13rd time slot carried out capabilities exchange as first time slot of agreement H.320, the BAS sign indicating number position of the 13rd time slot is with H.320 system is identical, it is mutual to carry out ability with the 1152K rate capacity according to agreement H.320, realizes the communication of the second road video flowing;
Another embodiment of the present invention is a kind of three road video flowing means of communication that are used for, and implementation step is as follows, and wherein the first via is a 384K speed, and the second the tunnel is 768K speed, and Third Road speed is 256K speed:
The first step: mutual according to the ability that former H.320 agreement is finished first via video flowing with the 384K rate capacity;
Second step: after the first step is finished, can obtain the used timeslot number of first via video flowing is 6 time slots, first time slot behind the used time slot of first via video flowing, and promptly the FAS code position of the 7th time slot correspondence is sought frame alignment, if can find, then thinking has the second road video flowing;
The 3rd step: after defining the second road video flowing, first time slot behind the used time slot of first via video flowing is that the 7th time slot begins to carry out the mutual of the second road video flowing, the 7th time slot carried out capabilities exchange as first time slot of agreement H.320, the BAS sign indicating number position of the 7th time slot is with H.320 system is identical, it is mutual to carry out ability with the 768K rate capacity according to agreement H.320, realizes the communication of the second road video flowing;
The 4th goes on foot: after finishing in the 3rd step, can obtain the used timeslot number of the second road video flowing is 12 time slots, first time slot behind the used time slot of the second road video flowing, the i.e. FAS of the 19th time slot correspondence (Frame Alignment Signal, the frame alignment mark) code position is sought frame alignment, if can find, then thinking has the Third Road video flowing;
The 5th step: after defining the four road video flowing, first time slot behind the used time slot of the second road video flowing is that the 19th time slot carries out the mutual of Third Road video flowing, the 19th time slot carried out capabilities exchange as first time slot of agreement H.320, BAS (the Bit-rateAllocation Signal of the 19th time slot, the position distribute labels) the sign indicating number position is with H.320 system is identical, it is mutual to carry out ability with the 256K rate capacity according to agreement H.320, realizes the communication of Third Road video flowing;
Certainly, according to the main design of invention, can carry out the video flowing communication of multichannel, on the basis of reference above-mentioned steps, the rest may be inferred, can realize the more communication of multi-path video stream, do not give unnecessary details one by one at this.
Claims (7)
1, a kind of method that realizes multi-channel video communication in TV conference system is characterized in that:
First via video flowing is finished first via video flowing mutual with the speed of first via video flowing according to agreement H.320 after, obtain the used time slot of first via video flowing;
The frame alignment flag F AS code position of a certain setting time slot correspondence behind the used time slot of first via video flowing is sought frame alignment, determines to exist the second road video flowing;
A certain setting time slot behind the used time slot of first via video flowing begins to carry out the mutual of the second road video flowing, and this time slot carried out capabilities exchange as first time slot of agreement H.320, add a corresponding frame alignment flag F AS sign indicating number and a position distribute labels BAS sign indicating number in this time slot code position.
2, realize the method for multi-channel video communication according to claim 1 in TV conference system, described a certain setting time slot is first time slot behind the used time slot of first via video flowing.
3, in TV conference system, realize the method for multi-channel video communication as claimed in claim 1 or 2, it is characterized in that this method is applicable to the network based on circuit switching.
4, as in TV conference system, realizing the method for multi-channel video communication as described in the claim 3, it is characterized in that, this method be applicable to E1, V.35, the ISDN telecommunication network.
5, a kind of method that realizes multi-channel video communication in TV conference system is characterized in that, may further comprise the steps:
The first step: finish the mutual of first via video flowing with the speed of first via video flowing according to agreement H.320;
Second step: after the first step is finished, can obtain the used timeslot number of first via video flowing, the frame alignment flag F AS code position of the first time slot correspondence behind the used time slot of first via video flowing is sought frame alignment, if can find, then thinking has the second road video flowing;
The 3rd step: after defining the second road video flowing, first time slot behind the used time slot of first via video flowing begins to carry out the mutual of the second road video flowing, this time slot is carried out capabilities exchange as first time slot of agreement H.320, add a corresponding frame alignment flag F AS sign indicating number and a position distribute labels BAS sign indicating number in this time slot;
The 4th step: the frame alignment flag F AS code position of a certain setting time slot correspondence behind the used timeslot number of the second road video flowing is sought frame alignment, if can find, then thinking has the Third Road video flowing;
The 5th step: after defining the second road video flowing, first time slot behind the used time slot of the second road video flowing carries out the mutual of Third Road video flowing, this time slot is carried out capabilities exchange as first time slot of agreement H.320, add a corresponding frame alignment flag F AS sign indicating number and a position distribute labels BAS sign indicating number in this time slot;
The 6th step: the rest may be inferred, repeats aforesaid operations, can realize more multi-path video stream.
6, as in TV conference system, realizing the method for multi-channel video communication as described in the claim 5, it is characterized in that this method is applicable to the network based on circuit switching.
7, as in TV conference system, realizing the method for multi-channel video communication as described in the claim 6, it is characterized in that, this method be applicable to E1, V.35, the ISDN telecommunication network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113312 CN1266939C (en) | 2003-04-23 | 2003-04-23 | Method for implementing multiplexing video communication in video conference system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113312 CN1266939C (en) | 2003-04-23 | 2003-04-23 | Method for implementing multiplexing video communication in video conference system |
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| CN1540987A true CN1540987A (en) | 2004-10-27 |
| CN1266939C CN1266939C (en) | 2006-07-26 |
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| CN 03113312 Expired - Fee Related CN1266939C (en) | 2003-04-23 | 2003-04-23 | Method for implementing multiplexing video communication in video conference system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007009293A1 (en) * | 2005-07-19 | 2007-01-25 | Zte Corporation | Method for remote controlling the h.320 video conference terminal |
| CN101895720A (en) * | 2010-08-19 | 2010-11-24 | 和记奥普泰通信技术有限公司 | Teleconference chip and teleconference control method thereof |
| CN101232344B (en) * | 2007-01-23 | 2012-01-04 | 华为技术有限公司 | Method and apparatus for frame alignment |
| CN102498716A (en) * | 2009-04-29 | 2012-06-13 | 思科系统国际公司 | Method and device for establishing simultaneous incoming circuit switched calls |
-
2003
- 2003-04-23 CN CN 03113312 patent/CN1266939C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007009293A1 (en) * | 2005-07-19 | 2007-01-25 | Zte Corporation | Method for remote controlling the h.320 video conference terminal |
| CN101232344B (en) * | 2007-01-23 | 2012-01-04 | 华为技术有限公司 | Method and apparatus for frame alignment |
| CN102498716A (en) * | 2009-04-29 | 2012-06-13 | 思科系统国际公司 | Method and device for establishing simultaneous incoming circuit switched calls |
| CN102498716B (en) * | 2009-04-29 | 2014-10-22 | 思科系统国际公司 | Method and device for establishing simultaneous incoming circuit switched calls |
| CN101895720A (en) * | 2010-08-19 | 2010-11-24 | 和记奥普泰通信技术有限公司 | Teleconference chip and teleconference control method thereof |
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| Publication number | Publication date |
|---|---|
| CN1266939C (en) | 2006-07-26 |
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