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Optical Engineering

Variable block-size selection for video transcoding based on macro block motion information
Author(s): Xiangwen Wang; Jun Sun; Songyu Yu
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Paper Abstract

The increasingly extensive applications of the latest video coding standard H.264 creates an urgent need to transcode the widely available MPEG-2 compressed video to H.264 compressed format. This paper presents a novel fast variable block-size selection algorithm for inter macro block (MB) based on the MB motion information aiming for providing low-complexity transcoding technique. The edge pattern of the MB residual as well as motion vector is employed for analyzing the MB motion characteristics. An optimal block size is decided based on the characteristics without conducting motion reestimation. Experiment results show that this method reduces the transcoder complexity dramatically with little compression performance degradation.

Paper Details

Date Published: 1 December 2008
PDF: 6 pages
Opt. Eng. 47(12) 127004 doi: 10.1117/1.3041771
Published in: Optical Engineering Volume 47, Issue 12
Show Author Affiliations
Xiangwen Wang, Shanghai Jiao Tong Univ. (China)
Jun Sun, Shanghai Jiao Tong Univ. (China)
Songyu Yu, Shanghai Jiao Tong Univ. (China)


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