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Progressive Side Information Refinement Algorithm for Wyner-Ziv Codec
Chan-Hee HAN Si-Woong LEE Hamid GHOLAMHOSSEINI Yun-Ho KO
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2011/08/01
Online ISSN: 1745-1361
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Image Processing and Video Processing
Wyner-Ziv video codec, distributed video coding, side information refinement, band-wise side information refinement, field-wise side information refinement,
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In this paper, side information refinement methods for Wyner-Ziv video codec are presented. In the proposed method, each block of a Wyner-Ziv frame is separated into a predefined number of groups, and these groups are interleaved to be coded. The side information for the first group is generated by the motion compensated temporal interpolation using adjacent key frames only. Then, the side information for remaining groups is gradually refined using the knowledge of the already decoded signal of the current Wyner-Ziv frame. Based on this basic concept, two progressive side information refinement methods are proposed. One is the band-wise side information refinement (BW-SIR) method which is based on transform domain interleaving, while the other is the field-wise side information refinement (FW-SIR) method which is based on pixel domain interleaving. Simulation results show that the proposed methods improve the quality of the side information and rate-distortion performance compared to the conventional side information refinement methods.