Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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An Adaptive Rate-Distortion Optimization Method for H.264 Video Codec

H.264를 위한 적응적인 비트-왜곡 최적화 방법

  • Oh, Kwan-Jung (Gwangju Institute of Science and Technology (GIST)) ;
  • Ho, Yo-Sung (Gwangju Institute of Science and Technology (GIST))
  • 오관정 (광주과학기술원 정보통신공학과) ;
  • 호요성 (광주과학기술원 정보통신공학과)
  • Published : 2005.11.26
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Abstract

Several video coding standards, such as MPEG-4 and H.263, have been investigated to reduce the resulting number of bits while pursuing the maximum video quality. The recent video coding standard, H.264, provides higher coding efficiency than previous coding standards by using the mode decision scheme. For mode decision, H.264 chooses the best macroblock mode among the several candidates using Lagrangian cost function which reflects both the rate and the distortion. H.264 employs only one rate-distortion optimization (RDO) model for all macroblocks. Since the characteristics of each macroblock is different, each macroblock should have its own RDO model. In this paper, we propose an adaptive rate-distortion optimization algorithm for H.264. We regulate the Lagrangian multiplier considering the picture type and characteristics of each macroblock.

Keywords