4 August 2010 Side information enhancement via texture and motion activity analysis in distributed video coding
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Proceedings Volume 7744, Visual Communications and Image Processing 2010; 77442E (2010) https://doi.org/10.1117/12.863452
Event: Visual Communications and Image Processing 2010, 2010, Huangshan, China
Abstract
This paper investigates how to exploit the artifacts constraint to enhance the quality of side information (SI) in distributed video coding (DVC). The idea originates from the observation that there are usually some regions shown as artifacts in the interpolated SI, which seriously degrade the overall performance of the DVC system, especially when the GOP size is large. Encouraged by the previous work about the backward channel in the literature, we propose a simple and effective DVC scheme based on artifact detection and removal. On one hand, texture analysis via dynamic range and local entropy is utilized to determine artifact regions in spatial domain. On the other hand, motion activity evaluation is used to determine artifact regions in temporal domain, and temporal local entropy difference is further employed to eliminate the effect of other factors like brightness variance. After the artifact blocks are detected, we re-code them in intra mode and replace the co-located ones at the decoder side so that the quality of SI is enhanced. Experimental results demonstrate that the proposed SI quality enhancement technique is effective.
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Xianming Liu, Xianming Liu, Debin Zhao, Debin Zhao, Siwei Ma, Siwei Ma, Wen Gao, Wen Gao, } "Side information enhancement via texture and motion activity analysis in distributed video coding", Proc. SPIE 7744, Visual Communications and Image Processing 2010, 77442E (4 August 2010); doi: 10.1117/12.863452; https://doi.org/10.1117/12.863452
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