Perceptual Motivated Coding Strategy for Quality Consistency

  • Like Yu
  • Feng Dai
  • Yongdong Zhang
  • Shouxun Lin
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6523)

Abstract

In this paper, we propose a novel quality control scheme which aims to keep quality consistency within a frame. Quality consistency is an important requirement in video coding. However, many existing schemes usually consider the quality consistency as the quantization parameter (QP) consistency. Moreover, the most frequently used metric to evaluate the quality consistency is PSNR, which has been well known that it is not good for subjective quality evaluation. These flaws of the existing methods are pointed out and proved to be unreasonable. For optimization, we take the effect of texture complexity on subjective evaluation into consideration to build a new D-Q model. We use the new model to adjust the quantization parameters of different regions to keep quality consistency. The simulation result shows that the new scheme gets better subjective quality and higher coding efficiency compared to traditional way.

Keywords

quality consistency quality fluctuation video coding H.264/AVC perceptual quality 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Like Yu
    • 1
    • 2
  • Feng Dai
    • 1
  • Yongdong Zhang
    • 1
  • Shouxun Lin
    • 1
  1. 1.Institute of Computing TechnologyChinese Academy of SciencesBeijingChina
  2. 2.Graduate University of Chinese Academy of SciencesBeijingChina

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