Block-layer optimal bit allocation based on constant perceptual quality

Chao Wang; Xuanqin Mou; Lei Zhang

doi:10.1117/12.908109

15 February 2012 Block-layer optimal bit allocation based on constant perceptual quality

Chao Wang, Xuanqin Mou, Lei Zhang

Proceedings Volume 8305, Visual Information Processing and Communication III; 83050E (2012) https://doi.org/10.1117/12.908109
Event: IS&T/SPIE Electronic Imaging, 2012, Burlingame, California, United States

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.

Citation Download Citation

Chao Wang, Xuanqin Mou, and Lei Zhang "Block-layer optimal bit allocation based on constant perceptual quality", Proc. SPIE 8305, Visual Information Processing and Communication III, 83050E (15 February 2012); https://doi.org/10.1117/12.908109

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