Variable bit-rate coding based on human visual system

Jiro Katto*, Katsumasa Onda, Yasuhiko Yasuda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


One of the merits with the introduction of variable bit-rate coding to moving pictures is the constancy of picture quality. However, considering the fact that conventional SNR cannot reflect the result of subjective assessment sufficiently, other quality measures should be considered to design the variable bit-rate coders. In this paper, weighted SNR (WSNR), which is calculated by weighting coding errors with the spatial frequency response of human vision, is introduced as a quality measure in place of SNR, and the variable bit-rate coder based on this measure is considered. Then, subjective assessment is carried out and the effectiveness of our approach is confirmed.

Original languageEnglish
Pages (from-to)313-320
Number of pages8
JournalSignal Processing: Image Communication
Issue number4
Publication statusPublished - 1991 Sept
Externally publishedYes


  • Variable bit-rate coding
  • human visual system

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering


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