Design And Realization Of The Desktop Video Conference System Based On H.323

With the development of IP network and information processing technology, video conferencing system receives more and more attention. As a means of late-model communication and information exchanging, video conferencing system transmits video and audio service more convenient, flexible and complete without territorial restrictions. It has very extensive development prospect and certain value in practice.Based on research and analyze of H.323 standard and related protocol, this thesis design and realize an IP-based network model of multi-point video conference system. The system adopts H.323 protocol and mainly divides into six function modules: conference control and management, video/audio flow control, electronic whiteboard, text chat, file transfer and network communications. The later five are integrated by conference management. System data communication uses TCP protocol, and audio communication employs UDP protocol and multicast; by assigning different transmission socket to different functions, it carries out separation of data and ensures a reliable data transmission and a real-time audio/video communication.After being tested, the video conference system is feasible; all function modules have achieved the expected goal.