Research And Application Of Audio And Video Sreaming Transmssion Based On IP Network

Real-time transport protocol is analyzed in this paper. Some questions related to real-time transport are studied. These questions mainly involve coding/decoding of audio and video data, transmission protocols and congestion control. Then, it puts forward a MPEG-4 video transport model based on RTP, explores the payload format of RTP and packetization algorithm, suitable for MPEG-4 audio and video bit-streams to achieve simultaneously both high efficiency and robustness for Internet MPEG-4 video. At the same time, In allusion to the characteristic of streaming media Transmission on IP network , The thesis makes improvement on the algorithm of congestion control based on AIMD through coming up with an autoadapt threshold adjust scheme , in order to reduce surge of sending ratio, improved the QoS transmission of audio and video information.Finally, a real-time audio conversation system over RTP/RTCP protocols is brought forward and illustrated. It is proved that the system used to transport audio is very effective over RTP/RTCP.