Research On The Technique Of The Side Information In Distributed Video Coding

With the advantages of low encoder complexity, low power consumption and strong error resilience, the Distributed Video Coding (DVC) is very important for the wireless video terminators which have limited computation ability, storage capability and power consumption. In DVC system, side information is great important, because it can directly influence the rate distortion and compression performance of a DVC system. So the task of the paper is the research of the side information in the Distributed Video Coding.In the first, this paper reviews the theoretic basis and the research development in DVC, and introduces several classical DVC structure, then the paper analyses several general algorithms of side information generation and of side information generation. And the paper then focuses on analyzing and implementing the method with spatio-temporal side information. A method of improving the side information is proposed using the whole frame loss recovery algorithm in the conventional video coding and the algorithm of motion compensated based on the block matching. Compared to the conventional Motion Compensated extrapolation, not only increase the PSNR of the side information, but also improve the block effect of the image. At the same time, an updating scheme which based the block track switching is proposed. We use conic and index instead of the linearity, and make a lot of experiments. Extensive simulations over various test video sequences show, the quality of the image in using the updating scheme is better, the CRC bits transferred from the encoder is less, so the performance of the whole system is advanced.