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2009 WRI World Congress on Computer Science and Information Engineering
An Improved Side Information Refinement Method in Distributed Video Coding
Los Angeles, California USA
March 31-April 02
ISBN: 978-0-7695-3507-4
Distributed video coding (DVC) is a new kind of video codec scheme that exploits the statistical characteristics of source at the decoder part. The estimated side information is modeled with the original Wyner-Ziv frame and an additive noise. Side information plays an important role in determining the performance of the codec. In Turbo-or-LDPC-based DVC decoding, the log-likelihood ratio (LLR) for every source bit is calculated using side information and dependent channel model. In this paper, we propose a side information refinement method, which uses previously decoded bit-planes to update the side information for current bit-plane decoding. With the refined side information, more accurate channel model and bit LLRs are achieved, which results in a lower bit rate in video coding Rate-Distortion (RD) performance.
Citation:
Xiaodong Liu, Qionghai Dai, Rui Wang, "An Improved Side Information Refinement Method in Distributed Video Coding," csie, vol. 6, pp.312-315, 2009 WRI World Congress on Computer Science and Information Engineering, 2009
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