一种视频会议系统的研究与实现

摘要

介绍了使用局域网组播技术和Directshow多媒体开发框架实现多方视频会议系统的方法。系统引入了会议管理服务器以控制多媒体数据在网络中的接入和访问,使网络不会由于多媒体数据的激增而发生拥塞,从而保证服务质量。系统使用了面向对象的方法和UML语言,分析和设计了各个模块。系统的视频部分采用了MPEG-4编解码技术,音频数据留采用了G.729编解码方法。根据该设计方案,完成了该系统的设计和开发,实现了多人同时通讯的模拟视频会议功能。%A video conference system based on the multicast technology and Directshow framework is proposed in this paper.The conference management server is introduced to handle the access of the multimedia data and avoid network congestion,which can also enhance the quality of the service of network.By using the object orient modeling and UML(unified modeling language),the paper analyzes and designs modules for real-time operation.Video streams are encoded in MPEG-4 format while audio streams are compressed in G.729 format.In this way,the system is designed and developed based on the scheme,fulfilling the anticipated requirement.