Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Adaptive mode decision based on R-D optimization in H.264 using sequence statistics

영상의 복잡도를 고려한 H.264 기반 비트 율-왜곡 최적화 매크로블록 모드 결정 기법

  • Kim, Sung-Jei (School of Electronical & Electronic Engineering Yonsei University) ;
  • Choe, Yoon-Sik (School of Electronical & Electronic Engineering Yonsei University)
  • 김성제 (연세대학교 전기전자공학과) ;
  • 최윤식 (연세대학교 전기전자공학과)
  • Published : 2006.06.21
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Abstract

This paper presents rate-distortion optimization that is considered sequence statistics(complexity) to choose the best macroblock mode decision in H.264. In previous work, Lagrange multiplier is derived by the function of constant value 0.85 and QP so that is not the proper Lagrange multilplier for any image sequence. The proposed algorithm solves the problem by changing constant value 0.85 into adaptive value which is influenced by image complexity, and by reducing the encoder complexity to estimate the image statistics with the multiplication of transformed, quantized rate and distortion. Proposed algorithm is achieved the bit-rate saving up to 5% better than previous method.

Keywords