Yongzhi Wang: an Improved Svc Algorithm to Optimize the Rate of Distortion over ..

Current advances in technology mean multimedia applications like video is becoming increasingly more important in mobile ad hoc networks. To transmit video information quickly and without errors in networks with different packet loss rates is a key technical problem. In this paper, the encoding problem of rate distortion optimization with JSVM (Joint Scalable Video Model) is studied according to H.264 SVC (Scalable Video Coding) standard framework. Then to satisfy the characteristics of high bit error rate during video transmission using MANETs, an improved algorithm using SVC video encoding to optimize distortion rate is proposed. The algorithm can adjust quantization parameters according to the detected channel packet loss rate to be more suitable for video communication over networks with different packet loss rates. Simulation results show that the video streams encoded by the improved algorithm have good transmission behavior in MANET with high bit error rate and frequent link changes, and achieves better decoded video image quality.