Improvement of congestion control algorithm about MPEG-4 real time video transfer

The research about improvement of video transfer is an important topic in netwok congestion control. Firstly, the code ratio control technology and frame of real time video transfer are introduced. Secondly, congestion control mechanism about packets losing ratio and two thresholds of packets losing ratio is researched. Thirdly, the VM8 code ratio control algorithm is introduced. Subsequently, the lack of VM8 code ratio control algorithm is proposed, and the improvements about the algorithm are made. The improvements are mainly made that according as current packet losing ratio, the change of sending rate is forecasted, so the goal level parameters are determined dynamically. The improved algorithm has a forcast function to the sending rate. Experiment results indicate that the coded image quality is improved by using the new algorithm