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Proceedings Paper

A novel approach to skip mode decision for H.264
Author(s): D. Wu; K. P. Lim; W. Yao; T. K. Chiew; J. Y. Tham
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Paper Abstract

One of the most frequently used coding mode in H.264 is skip mode. In the conventional approach, after the best RD mode has been computed and the resultant predicted error coefficients block is all quantized to zero, it is switched to skip mode. This is a waste of computational resources because skip mode doesn't require forward transform and quantization. In this paper, skip mode condition is checked for the macroblock prior to multi-block motion estimation. Motion estimation will not be performed if the condition is satisfied which will drastically reduce the computations. The condition considers zero-block property after 4x4 block transform/quantisation and caters for noise inherent in natural video images. In addition, color components are also taken into consideration for skip mode decision. The experimental results show that the approach can improve encoder speed greatly with negligible bit rate increase or PSNR degradation.

Paper Details

Date Published: 28 January 2008
PDF: 7 pages
Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68220A (28 January 2008); doi: 10.1117/12.765050
Show Author Affiliations
D. Wu, Institute for Infocomm Research (Singapore)
K. P. Lim, Institute for Infocomm Research (Singapore)
W. Yao, Institute for Infocomm Research (Singapore)
T. K. Chiew, Institute for Infocomm Research (Singapore)
J. Y. Tham, Institute for Infocomm Research (Singapore)

Published in SPIE Proceedings Vol. 6822:
Visual Communications and Image Processing 2008
William A. Pearlman; John W. Woods; Ligang Lu, Editor(s)

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