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Proceedings Paper

Design of adaptive quantizer for MPEG video coding
Author(s): Jun Sun; Wenjun Zhang; Songyu Yu
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Paper Abstract

In this paper, we design a new quantizer on studying the strategy for adaptive quantization proposed by MPEG-2 TM5. To exploit local perceptual characteristics in the macroblock, block-based visual activities are analyzed and then macroblock characteristic is identified by evaluating each block's local activity within it comprehensively to decide the adaptive perceptual quantization factor. Experiment results show that coding distortion is uniformly distributed across the image with the proposed quantizer, and picture quality is improved. In particular, block artifacts in flat area and distortion at edges on flat backgrounds are significantly reduced.

Paper Details

Date Published: 17 February 1995
PDF: 8 pages
Proc. SPIE 2451, Advanced Image and Video Communications and Storage Technologies, (17 February 1995);
Show Author Affiliations
Jun Sun, Shanghai Jiao Tong Univ. (China)
Wenjun Zhang, Shanghai Jiao Tong Univ. (China)
Songyu Yu, Shanghai Jiao Tong Univ. (China)

Published in SPIE Proceedings Vol. 2451:
Advanced Image and Video Communications and Storage Technologies
Naohisa Ohta; Heinz U. Lemke; Jean Claude Lehureau, Editor(s)

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