Research Of The MPEG-4 Video Stream Transportation Based On RTP

The MPEG-4 video streaming transport becomes an important topic on multimedia. It means significant to research. Using MPEG-4 codec technology and RTP/RTCP protocol, the paper gives a real-time video stream transport architecture over the Internet based C/S model, which aims at matching of the MPEG-4 video transport rate and bandwidth, at using the resource of Internet sufficiently and at archiving excellent video.Firstly, the paper discusses the limit of the HTTP/TCP. It describes the Real-time Transport Protocol and summarizes system architecture of MPEG-4, as well as encoding technology.Secondly, the author analyzes adaptive encoding control algorithm, pack algorithm and feedback congestion control algorithm suited to MPEG-4 video. Taking into account the matching transport rate and bandwidth, the author gives an improvement and optimization of the feedback congestion control algorithm.Finally, a feasible project of network visual telephone is designed. It depends on the analyzing of MPEG-4 encoding and transporting researched before, and on DirectShow technology. The components, such as the real-time sample, video encoding, video decoding and display, are programmed and tested. In order to application, the author presents a structure between clients and a structure between client and server, aimed to manage the action of clients.