中文摘要：

对于位于多个不同地点的人们来说,视频会议是沟通交流的首选方法之一。随着软件技术的发展,中小企业以及个人用户都得以使用基于个人电脑和共享线路的低成本视频会议服务。此时用户接收设备和网络环境的异构性就成为了亟待解决的问题。文章首先简单介绍了视频会议系统的构成,然后阐述了视频会议技术所面临的难题及其解决方法。

英文摘要：

Video conferencing is one of the most popular choices for geographically distributed people to communicate with each other. With the development of software technology, minor enterprises and individual user could use personal computer and shared links-based video conferencing service at very low cost. Hence the heterogeneity of user device and user network environment becomes the most important problem. First the system of video conferencing is briefly introduced, then the challenges and solutions of video conferencing are carefully discussed.