Distributed Video Coding Technology Based on H.264 and Turbo Code

Distributed video coding (DVC) technology is investigated and payed more and more attentions in wireless video applications because of characteristics of its encoder with low-complexity and decoder with high-complexity. Its coding types can be sorted the key and Wyner-Ziv frames, key frames are with conventional intra-coding mode, Wyner-Ziv frames are coded by an encoder that is composed of quantizer following with Slepian-wolf coder, but the Slepian-wolf source coding is realized by use of channel encoding techniques again. During the experiment, we adopt excellent H.264 intra-coding algorithm in key frames and mode decision optimization of intra encoding which is realized by making use of the Sobel algorithm. Slepian-wolf coder which is based on turbo code channel encoding and followed with 2M levels quantizer are used to encode Wyner-Ziv frames. The experiment results demonstrate that 2-7 dB of PSNR is gained and the DVC algorithm is effective to wireless video application.