Research And Design Of Video Conference

With the development of information, people need some way to centralize the audio,video and data communication. The video conference is based on this. As an new way for conference service, video conference runs on the INTRANET and WAN, which provide a new network communication system to communicate video,audio and data for enterprise and government. It uses the advanced multi-media and network and clear network band to get clear video and audio effect.As the result of complexity of video conference, its development cost highly. And it can't be developed aglity and expansibility. In this paper we use the OpenH323 Library which is open source to build a software video conference. We designed the terminal that can be used in commom PC. And we also give a improve arithmetic for audio and video synchronization which influent the quality of video conference.In this paper, we first researched the H.323 protocol which established by ITU-T. We research its configuration of H.323 protocol,H.255.0 RAS protocol and H.245 media control protocol which is in the communication process.Then we used the OpenH323 platform which developed by Equivalence Pty Ltd of Australia to design the whole frame of the video conference. And before this, we analyzed the resource code for OpenH323 platform. Based this, we designed the modules of the system detailed.Last On the termination of the video conference system, we concentrated on researching the video module and audio module. For these two modules, we respective used the Waveform Audio API and VFW of Microsoft Ltd to implement them. Base this, we research the synchronization between video and audio which takes care the quality of the system.In this paper we anatomied and improved the open source platform to give the research on the multi-media video conference system a good basis. The video conference system was developed in this paper is based on the open code source. It can runs steadily and satisfy the demand of the company. It also has a high ratio between function and price. So it gives excellent utility.