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Proceedings Paper

Block-layer optimal bit allocation based on constant perceptual quality
Author(s): Chao Wang; Xuanqin Mou; Lei Zhang
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Paper Abstract

Bit allocation is a key issue in image/video coding. An optimal bit allocation can improve the encoding performance, which means to maximize the image/video quality in the constraint of bit rate, or vice versa, to minimize the bit rate with a restrictive quality. We suggest that the bit allocation for macro blocks (MBs) can be optimized by aiming at the constant perceptual quality (CPQ) inside an image/a frame. Based on the MINMAX criterion, we proposed a multi-pass block-layer bit allocation scheme for intra frame encoding, in which all the local areas in a frame get approximately the same perceptual quality by choosing the quantization parameter (QP) for each MB. The experimental results show that the proposed method can improve the encoding performance obviously.

Paper Details

Date Published: 15 February 2012
PDF: 9 pages
Proc. SPIE 8305, Visual Information Processing and Communication III, 83050E (15 February 2012); doi: 10.1117/12.908109
Show Author Affiliations
Chao Wang, Xi'an Jiaotong Univ. (China)
Xuanqin Mou, Xi'an Jiaotong Univ. (China)
Lei Zhang, The Hong Kong Polytechnic Univ. (Hong Kong, China)

Published in SPIE Proceedings Vol. 8305:
Visual Information Processing and Communication III
Amir Said; Onur G. Guleryuz; Robert L. Stevenson, Editor(s)

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