Side information refinement scheme in Transform Domain Distributed Video Coding

Abstract

In this paper, we propose the Side Information refinement scheme for the Transform Domain Wyner-Ziv video codec. As the quality of Side Information affects the Rate-Distortion performance of the Wyner-Ziv coding scheme, recent schemes are based on the refinement of the Side Information in the Wyner-Ziv decoding loop to improve the Rate-Distortion performance. But the schemes are not competitive compared to the low complexity conventional coding schemes(H.264 intra and zero motion codecs) and the conventional H.264 inter coding schemes. As the codec requires huge bit rate to decode the DC band using the initial motion compensated temporal interpolated Side Information, we propose the scheme, by forming the layers with in the DC band and Side Information refinement is applied after decoding coefficients in each layer. The proposed scheme improves the Rate-Distortion performance and results in the WZ bit rate savings upto 7.78 % compared to the recent schemes.