摘要： 目前,上的视频直播主要是以单播()的方式传送的,这对于宝贵的网络带宽而言,无疑是巨大InternetUnicast的浪费。文章分析了当前网络视频的概况及网络视频直播的特点,遵从实时传输协议()和实时流协议(RTP),设计了一个旨在节省网络带宽、提高网络性能的网络视频直播缓存系统。该直播缓存系统监听并接受客户请RTSP求,对于已经存在的媒体流,不再与源服务器交互,而是利用缓存的内容直接为其提供服务,从而节省了网络带宽,同时也减轻了源服务器的负担。

关键词: 网络视频, 直播, 缓存

Abstract: The transport type of most living broadcast via Internet is Unicast. That is to say, there is an unshared stream for each client on the Internet. There is no doubt it is a significant waste of network bandwidth. In this essay, the outline of the networkvideo and the characteristics of living broadcast via Internet are analyzed. The principles of real-time transport protocol and real-time streaming protocol are introduced. And a caching system for living video via network whose main purpose is to save the bandwidth of the Internet and enhance the network performance is designed. The system located between the client and the originalvideo server. It listens the request from the clients and accepts it. If the stream the client requests has already existed, the cache server will serve the client directly instead of requesting new stream from the original server. Thus the bandwidth of the Internet is saved and the burden of the original video server is alleviated.

中图分类号: 

• TN919.8