Residual Distributed Video Coding Based on LQR-Hash∗

Abstract — Distributed source coding (DSC) and Dis-tributed video coding (DVC) have aroused high research interest due to their property of low-complexity encod-ing. This paper presents a residual DVC based on Low quality reference (LQR) hash compressed by 0-motion H.264/AVC. SW-SPIHT is applied to the residual between Wyner-Ziv frame and the decoded LQR hash, which ex-ploits the temporal and spatial correlations so improves the coding efficiency. At the decoder, the decoded LQR is used for more accurate motion estimation and better side information. And a refinement reconstruction with side information is proposed for better SPIHT decoding. The experimental results indicate the proposed scheme achieves better rate-distortion performance than current literatures under the constraint of similar encoding complexity. Key words — Distributed video coding, Low qual-ity reference (LQR) hash, Residual coding, Slepian-Wolf