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http://dx.doi.org/10.5909/JEB.2011.16.3.510

A Frame-based Coding Mode Decision for Temporally Active Video Sequence in Distributed Video Coding  

Hoangvan, Xiem (School of Information and Communication Engineering. Sungkyunkwan University)
Park, Jong-Bin (School of Information and Communication Engineering. Sungkyunkwan University)
Shim, Hiuk-Jae (School of Information and Communication Engineering. Sungkyunkwan University)
Jeon, Byeung-Woo (School of Information and Communication Engineering. Sungkyunkwan University)
Publication Information
Journal of Broadcast Engineering / v.16, no.3, 2011 , pp. 510-519 More about this Journal
Abstract
Intra mode decision is a useful coding tool in Distributed Video Coding (DVC) for improving DVC coding efficiency for video sequences having fast motion. A major limitation associated with the existing intra mode decision methods, however, is that its efficiency highly depends on user-specified thresholds or modeling parameters. This paper proposes an entropy-based method to address this problem. The probabilities of intra and Wyner?Ziv (WZ) modes are determined firstly by examining correlation of pixels in spatial and temporal directions. Based on these probabilities, entropy of the intra and the WZ modes are computed. A comparison based on the entropy values decides a coding mode between intra coding and WZ coding without relying on any user-specified thresholds or modeling parameters. Experimental results show its superior rate-distortion performance of improvements of PSNR up to 2 dB against a conventional Wyner?Ziv coding without intra mode decision. Furthermore, since the proposed method does not require any thresholds or modeling parameters from users, it is very attractive for real life applications.
Keywords
Distributed video coding; Wyner-Ziv coding; Intra coding mode decision; Entropy based method;
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Times Cited By KSCI : 3  (Citation Analysis)
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