基于IP网络的视频会议系统

随着通信、网络和多媒体技术的不断发展，今天的视频会议系统更多的已采用了
基于IP 网络的视频会议系统。本文对基于网络H.323 视频会议系统的结构和其中的各部件做了进一步的分析。并详细说明了该系统中的关键技术，特别是服务质量（QoS）问题，对IP 网络中的QoS 的改善提出了三项措施，其中的安全实时传输协议（SRTP）和视频垃圾检测对改善QoS 都有较大贡献。最后，简要分析了视频会议系统的数据协议模型。
关键词：多媒体；视频会议系统；IP 网络；多点控制单元；数据协议；
Video Conferencing System Based on IP LI-Jing, HUANG-Hua (School of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, China) Abstract ： Along with the development of communication, network and multimedia, nowadays, Video Conferencing System has run to the one based on IP network. This paper explains the structure of Video Conferencing System based on H.323 and its components. Moreover, it also introduces the important technologies specially the QoS, this paper gives three methods to improve the QoS in IP network, in which SRTP and Video-Spam Detection are more important. At last, it simply introduces the data protocol model of Video Conferencing System.
Key Words: Multimedia；Video Conferencing System； IP network； MCU；Data Protocol;