A Simple Reversed-Complexity Wyner-Ziv Video Coding Mode Based on a

Mukherjee, Debargha ; Machiavello, Bruno ; de Queiroz, Ricardo L.

HP Development Company

关键词: Wyner-Ziv;    Slepian Wolfe;    distributed coding;    reversed complexity;    reduced complexity;    spatial reduction;    coset codes;    syndrome;    super-resolution;   

RP-ID  :  HPL-2006-175

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

A spatial-resolution reduction based framework for incorporation of a Wyner-Ziv frame coding mode in existing video codecs is presented, to enable a mode of operation with low encoding complexity. The core Wyner-Ziv frame coder works on the Laplacian residual of a lower-resolution frame encoded by a regular codec at reduced resolution. The quantized transform coefficients of the residual frame are mapped to cosets to reduce the bit-rate. A detailed rate-distortion analysis and procedure for obtaining the optimal parameters based on a realistic statistical model for the transform coefficients and the side information is also presented. The decoder iteratively conducts motion-based side-information generation and coset decoding, to gradually refine the estimate of the frame. Preliminary results are presented for application to the H.263+ video codec. 11 Pages