ECVQ 를 이용한 영상의 계층적 대역분할 부호화

ECVQ for Subband Pyramid Image Coding

  • 이광기 (연세대학교 전자공학과) ;
  • 김인겸 (연세대학교 전자공학과) ;
  • 정준용 (연세대학교 전자공학과) ;
  • 류종일 (연세대학교 전자공학과) ;
  • 박규태 (연세대학교 전자공학과)
  • 발행 : 1994.04.01

초록

In this paper, we propose a subband pyramid image coding scheme that uses ECVQ (ntropy Constrained Vector Quantizer). In subband pyramid image coding, each subband can be encoded with a coder matched to the statistics of that particular subband, and available versions of the original image at different resolution are easily obtained. ECVQ, aiming at the minimization of the distortion for a fixed entropy of the quantizer output, is well combined with the subband pyramid image coding which yields high compression ratio and good image quality. The optimum bit allocation to each subbands corresponds to the points where the individual distortion rate curves are of particular slope, weighted to the number of samples in that subband, in designing ECVQ.

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