Block-layer optimal bit allocation based on constant perceptual quality

Chao Wang, Xuanqin Mou, Lei Zhang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging - Visual Information Processing and Communication III
Publication statusPublished - 26 Mar 2012
EventVisual Information Processing and Communication III - Burlingame, CA, United States
Duration: 24 Jan 201226 Jan 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceVisual Information Processing and Communication III
Country/TerritoryUnited States
CityBurlingame, CA


  • Block-layer bit allocation
  • Constant quality
  • Optimal bit allocation
  • Perceptual quality

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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