视频实时传输的研究与实现

Study of Video Real-time Transmission

随着网络的迅速发展,传统的TCP/IP协议在流媒体(音频流、视频流)的实时传输上受到了很大的挑战,因为该协议在网络上提供的是非实时的数据传输服务,并且其重传机制与拥塞控制机制也给实时传输带来较大困难.为了解决该问题提出了支持多媒体实时传输的协议RTP.主要论述了RTP协议及RTCP协议的基本原理,并以此为基础实现了在视频传输上的一个应用,提出了相应的拥塞控制策略,在百兆局域网上该应用获得了很好的效果.

Because of the rapid network development, the traditional TCP/IP protocol is faced with great challenge in the real time stream transmission. Because TCP/IP protocol supports no-real time data transmission and it＇s policy of re-sending and congestion control has brought much difficulty to the real time transmission. To .solve this problem, RTP protocol, which supports real time transmission, is brought forward. In this paper, the basic principle of RTP/RTCP is discussed, and the application of video transmission is realized. A strategy of relevant congestion control is put forward, which turns out to be very effective in the 100M local network.