CN103067688B - Based on the method that IP and HFC hybrid network realizes video conference - Google Patents
Based on the method that IP and HFC hybrid network realizes video conference Download PDFInfo
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Abstract
The method realizing video conference based on IP and HFC hybrid network designed by the present invention, the method is realized by video conference terminal, videoconference server, gateway server, IPQAM equipment, it is characterized in that video conference terminal by videoconference server inquire about meeting, application add meeting, by the videoconference server that is back to of audio-video signal, data are forwarded to IPQAM by gateway server and are realized by IP network by videoconference server；Audio, video data is issued to video conference terminal by IPQAM, adopts hfc plant.In the inventive method, the audio, video data of video conference is descending to be transmitted by hfc plant, the modulation of UDP message bag is sent in hfc plant by IPQAM equipment.Video conference terminal back information and audio, video data are uploaded by IP network carrying, and are sent to video server end by gateway server.Thus meeting the user's higher demand to video conferencing system.<!--1-->
Description
Technical field
The present invention relates to one and relate to the communications field, a kind of method realizing video conference based on IP and HFC hybrid network.
Background technology
Development along with the universal of video conferencing system application and network technology, user to the functional requirement of video conferencing system can more comprehensively, deeper into, therefore providing on the basis of basic function of video conferencing system, video conferencing system should also be as meeting growing user's request, the increase of interactive object quantity in video conference, video image quality raising etc., technical conditions required for realizing video conferencing system and method are also just had higher requirement by this.Video conference realizes the audio frequency and video interactive service of high-quality, the further popularization that video conferencing system is applied could be promoted.
Current video conferencing system all passes through IP network as communication link, but is as the universal of video conferencing system application, and the transmission bandwidth of IP network cannot meet the demand that user is growing.
Summary of the invention
A kind of method realizing video conference based on IP and HFC hybrid network that the invention aims to solve the deficiency of above-mentioned technology and provide high-fidelity audio-video signal being provided that multichannel is smooth mutual.
In order to achieve the above object, the method realizing video conference based on IP and HFC hybrid network designed by the present invention, the method is realized by video conference terminal, videoconference server, gateway server, IPQAM equipment, it is characterized in that video conference terminal by videoconference server inquire about meeting, application add meeting, by the videoconference server that is back to of audio-video signal, data are forwarded to IPQAM by gateway server and are realized by IP network by videoconference server；Audio, video data is issued to video conference terminal by IPQAM, adopts hfc plant.
When this method is implemented, first videoconference server creates meeting, video conference terminal passes through the IP network inquiry ongoing meeting of videoconference server and applies for adding meeting, and video conference terminal is carried out authentication by videoconference server, confirms joining meeting to terminal.
The audio, video data of main meeting-place (speechmaker) is uploaded to videoconference server by IP network, videoconference server converts audio, video data to multicast packets, transmitting data to gateway server by multicast mode, data are exported to IPQAM equipment by gateway server in the form mode of UDP package.Then IPQAM modulates data onto as being transferred to video conference terminal reception by hfc plant after RF signal, and video conference terminal is demodulated and output display to the signal received.
During video conference terminal speech, the video/audio signal collected is compressed, encodes by video conference terminal, reaches videoconference server through IP network.Video conference terminal signal is issued by videoconference server together with the signal of main meeting-place, thus reaching mutual purpose.
Videoconference server is responsible for conference management, video conference terminal user identity identification, audio, video data process and forwards;
Gateway server carries out the meeting audio-video signal that video server sends by primary responsibility and carries out transcoding and broadcast process, carries out IP data UDP and forwards；
IPQAM server primary responsibility is sent to video conference terminal by half-duplex channel after the transmission stream sent from gateway server carries out the process such as multiplexing modulation, being modulated into RF signal by the conversion of IP signal；
Video conference terminal receives and acquisition terminal as audio frequency and video；
In the inventive method, the audio, video data of video conference is descending to be transmitted by hfc plant, the modulation of UDP message bag is sent in hfc plant by IPQAM equipment.Video conference terminal back information and audio, video data are uploaded by IP network carrying, and are sent to video server end by gateway server.Thus solving in video conference, the problem that the transmission bandwidth brought because providing multi-channel video meeting is not enough, meanwhile, meet the user's higher demand to video conferencing system.
Accompanying drawing explanation
Fig. 1 is the network topology structure schematic diagram of the present invention；
Fig. 2 is the schematic flow sheet of the present invention.
Detailed description of the invention
In conjunction with accompanying drawing, the invention will be further described by the examples below.
Embodiment 1:
Such as Fig. 1, shown in Fig. 2, the method realizing video conference based on IP and HFC hybrid network that the present embodiment describes, videoconference server can be disposed in a network, gateway server, the functional entitys such as IPQAM, it is mutual that video conference terminal can carry out conferencing information by IP network and videoconference server, mike by being directly connected to videoconference server simultaneously, image first-class outside collecting device extraction and obtain IMS conference medium stream, outside collecting device can also pass through IP network by audio, video data transmission to videoconference server, then pass through conversion and the transmission of data, finally by hfc plant, the audio-video signal of meeting is issued to video conference terminal by IPQAM, thus it is mutual to realize audio frequency and video.
Below according to Fig. 2, the present invention carries out further detailed description:
201, video conference terminal is by video conference signaling in an ip network, with videoconference server consultative conference relevant information；
When video conference terminal joins in video conferencing system, it needs to consult its pre-receiving or the pre-IMS conference medium stream parameter sent with videoconference server, video conference terminal can by carrying out consultative conference media stream parameters with videoconference server interactive video conference control signaling
Videoconference server can obtain and carry above-mentioned IMS conference medium stream parameter by what reception video conference terminal sent.Owing to primary video meeting generally using fixing frequency be transmitted the transmission of stream (as TS flows), and in video conferencing system, the frequency point information of different video conferences is generally different from, therefore, before video conference starts, it is thus necessary to determine that video conference transmission stream parameter (can include frequency, Conference server IP, conference room name, the conferencing information such as title of other video conference terminals).
202, video conference terminal passes through IP network to videoconference server uploaded videos meeting audio, video data.
203, videoconference server issues the video conference audio-video signal stream received by IP network to gateway server.
204, the audio, video data etc. received is processed by gateway server；
When gateway server receives the audio, video data signal sended over by videoconference server, the audio and video data streams received can be changed into the transmission stream (as TSoverIP flows) with IP header according to audio and video data streams parameter by gateway server.
205, the above-mentioned transmission stream with IP header is sent to IPQAM by IP network by gateway server；
The transmission stream with IP header after its transcoding is sent to IPQAM by IP network by gateway server, in order to IPQAM carries out later stage process.
206, the transmission stream after process is sent to video conference terminal by hfc plant by IPQAM；
When IPQAM receives the transmission stream (as TSoverIP flows) appealed with IP header, according to the transmission stream parameter specified, it can be carried out process (such as multiplexing, modulation etc.) accordingly, and remove its IP header, be formed and transmit stream (as TS flows) accordingly；
Transmission stream after process is sent to corresponding video conference terminal by IPQAM.
207, video conference terminal receives and transmits stream accordingly, and it is resolved and plays；
Therefore, the embodiment of the present invention obtains, by videoconference server, the local audio-video signal that video video conference terminal is uploaded by IP network, and meeting relevant information is passed through IP negotiation mutual with video conference terminal realization, make video conference terminal can receive, according to relevant information, the transmission stream issued by IPQAM accordingly, and carry out resolving and playing；More reliable and more stable video conference is provided the user by the transmission characteristic of IP and HFC hybrid network, simultaneously in the embodiment of the present invention, IMS conference medium stream is handed down to video conference media termination by IPQAM, save IP network transmission bandwidth, in sum, what the embodiment of the present invention provided a kind of realize the method for video conference based on IP and HFC hybrid network and can efficiently solve the problem that in video conferencing system, bandwidth is not enough, meets the user's higher demand to video conferencing system simultaneously.
Claims (1)
1. the method realizing video conference based on IP and HFC hybrid network, the method is realized by video conference terminal, videoconference server, gateway server, IPQAM equipment, it is characterized in that video conference terminal by videoconference server inquire about meeting, application add meeting, by the videoconference server that is back to of audio-video signal, data are forwarded to IPQAM by gateway server and are realized by IP network by videoconference server；Audio, video data is issued to video conference terminal by IPQAM, adopts hfc plant；Concrete enforcement according to the following steps:
A. first videoconference server creates meeting, and video conference terminal passes through the IP network inquiry ongoing meeting of videoconference server and applies for adding meeting, and video conference terminal is carried out authentication by videoconference server, confirms joining meeting to terminal；
B. the audio, video data of main meeting-place is uploaded to videoconference server by IP network, videoconference server converts audio, video data to multicast packets, transmitting data to gateway server by multicast mode, data are exported to IPQAM equipment by gateway server in the form mode of UDP package；
C. then IPQAM modulates data onto as being transferred to video conference terminal reception by hfc plant after RF signal, and video conference terminal is demodulated and output display to the signal received；
D., during video conference terminal speech, the video/audio signal collected is compressed, encodes by video conference terminal, reaches videoconference server through IP network；
E. video conference terminal signal is issued by videoconference server together with the signal of main meeting-place, thus reaching mutual purpose；
Wherein videoconference server is responsible for conference management, video conference terminal user identity identification, audio, video data process and forwards；Gateway server carries out being responsible for meeting audio-video signal that video server is sent and carries out transcoding and broadcast process, carries out IP data UDP and forwards；IPQAM server primary responsibility is sent to video conference terminal by half-duplex channel after the transmission stream sent from gateway server carries out the process such as multiplexing modulation, being modulated into RF signal by the conversion of IP signal；Video conference terminal receives and acquisition terminal as audio frequency and video.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103501459A (en) * | 2013-09-06 | 2014-01-08 | 深圳市同洲电子股份有限公司 | Method, equipment and system for playing video |
| CN107846568A (en) * | 2017-11-17 | 2018-03-27 | 国网河南省电力公司信息通信公司 | A kind of Video Conference System and its a kind of video conference terminal subsystem |
| CN110855618B (en) * | 2019-10-15 | 2022-04-15 | 紫光云(南京)数字技术有限公司 | Audio and video service system based on hybrid cloud |
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