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Proceedings Paper

Adaptive Windowing Technique for Variable Block-size Motion Compensation
Author(s): Seung-Wook Park; Seung Hwan Kim; Chang-Su Kim; Sang-Uk Lee
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Paper Abstract

We propose an overlapped block motion compensation method, called adaptive windowing technique, to improve the performance of variable block-size motion compensation in H.264. First, we restrict the number of neighboring blocks to be overlapped. Then we design adaptive overlapping windows, where each weight is set to be inversely proportional to the distance between the current pixel and the neighboring block. The weights can be computed effciently in both the encoder and the decoder. Also, to further improve the prediction performance, we introduce the notion of reliability of a motion vector based on the block size, and fine-tune the weights according to the reliability. Extensive simulation results show that the proposed algorithm improves the performance of H.264 both objectively and subjectively.

Paper Details

Date Published: 18 January 2004
PDF: 11 pages
Proc. SPIE 5308, Visual Communications and Image Processing 2004, (18 January 2004); doi: 10.1117/12.526309
Show Author Affiliations
Seung-Wook Park, Seoul National Univ. (South Korea)
Seung Hwan Kim, Seoul National Univ. (South Korea)
Chang-Su Kim, Chinese Univ. of Hong Kong (China)
Sang-Uk Lee, Seoul National Univ. (South Korea)

Published in SPIE Proceedings Vol. 5308:
Visual Communications and Image Processing 2004
Sethuraman Panchanathan; Bhaskaran Vasudev, Editor(s)

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