The computation model of code error distortion based on the rate-distortion theory

Abstract

This paper starts from the end to end error distortion, constructs the statistical model of the information sources encoding distortion, channel error distortion, intra frame encoding macro block error diffusion, and the inter frame encoding macro block error diffusion, and brings forwards a rate distortion robust encoding control algorithm model under a low computation quantity. This method not only can acquire the optimal control point in the rate-distortion curve from the global perspective under the code error environment, but also can self adaptive adjust the bit allocation and the quantization parameter under given network bandwidth. Furthermore, it can also implement intra frame macro block refresh at the same time and play important role in counteracting the channel code error to minimize the total distortion under certain bit-rated according to current network package loss probability, by which to establish the rate distortion model of associated signal source channel and apply the rate-distortion optimized solution method to optimal allocate the bit-rate between the signal source coding and the channel coding. This method can provide valuable reference for the video robust coding transmission and resource allocation under the wireless environment.