Abstract
In this paper we consider two separate applications of Wyner-Ziv coding of motion video. The Wyner-Ziv Theorems on source coding with side information available only at the decoder suggests that an asymmetric video codec, where individual frames are encoded separately, but decoded conditionally (given temporally adjacent frames) could achieve efficiency comparable to current interframe video compression systems. We report first results on a Wyner-Ziv coding scheme for motion video that uses intraframe encoding, but interframe decoding. Secondly, we apply Wyner-Ziv coding to the transmission of compressed video over an error- prone channel. We use Wyner-Ziv Coding to generate a supplementary bitstream which contains a coarsely quantized representation of the transmitted video signal. Using the conventionally decoded, error-concealed video signal as side information to decode the Wyner-Ziv bits, the transmission errors in the decoded video waveform are corrected up to a certain residual distortion, significantly improving the visual quality of the decoded video.