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http://dx.doi.org/10.5909/JEB.2011.16.1.108

Transcoding from Distributed Video Coding to H.264/AVC Based on Motion Vectors of Side Information  

Min, Kyung-Yeon (Kwangwoon University)
Yoo, Sung-Eun (Kwangwoon University)
Sim, Dong-Gyu (Kwangwoon University)
Jeon, Byeung-Woo (Sungkyunkwan University)
Publication Information
Journal of Broadcast Engineering / v.16, no.1, 2011 , pp. 108-122 More about this Journal
Abstract
In this paper, a transcoding method with low computational complexity and high coding efficiency is proposed to transcode distributed video coding (DVC) bitstreams to H.264/AVC ones. For the proposed high-performance transcoding with low complexity, not only Wyner-Ziv frames but also key frames can be transcoded with motion vectors estimated in generation of side information. As a motion vector is estimated from a key frame to a prior key frame for side information generation, the motion vector can be used to encode the intra key frame as a predicted frame. Motion estimation is performed with two predicted motion vectors. One is the motion vector from side information generation and the other is median of motion vectors of neighboring blocks. The proposed method selects the best motion vector between two motion vectors based on rate-distortion optimization. Coding efficiency can be improved with a small size of search range, because a motion vector estimated in side information generation is used as an initial motion vector for transcoding. In the experimental results, complexity of transcoder is reduced about 12% and bitrate performance increases about 28.7%.
Keywords
H.264/AVC;
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Times Cited By KSCI : 2  (Citation Analysis)
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