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Proceedings Paper

Efficient and low-cost video transcoding
Author(s): Ligang Lu; Shu Xiao; Jack L. Kouloheris; Cesar A. Gonzales
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Paper Abstract

We present a low cost high performance scheme for video transcoding. Our scheme includes the information look-ahead structure and the transcoding algorithm. It is this look-ahead mechanism that greatly facilitates the use of information embedded in the bitstream for informative and intelligent transcoding. Furthermore, our transcoding algorithm has four new features: 1) picture complexity look-ahead for efficient rate allocation and control; 2) dynamic bit allocation weighting on picture types based on the scene complexity and bit rate; 3) adaptive nonlinear rate control on macroblocks based on complexity distribution in the picture; 4) Intra frame requantization adjustment to reduce the transcoding distortion. The software simulation results have proven that the performance of our transcoding scheme is significantly better than the reencoding scheme and comparable to the direct encoding scheme.

Paper Details

Date Published: 4 January 2002
PDF: 10 pages
Proc. SPIE 4671, Visual Communications and Image Processing 2002, (4 January 2002); doi: 10.1117/12.453053
Show Author Affiliations
Ligang Lu, IBM Thomas J. Watson Research Ctr. (United States)
Shu Xiao, SkyStream Networks, Inc. (United States)
Jack L. Kouloheris, IBM Thomas J. Watson Research Ctr. (United States)
Cesar A. Gonzales, IBM Thomas J. Watson Research Ctr. (United States)

Published in SPIE Proceedings Vol. 4671:
Visual Communications and Image Processing 2002
C.-C. Jay Kuo, Editor(s)

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