Color quantization of compressed video sequences

Wan Fung Cheung, Yuk Hee Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

This paper presents a novel color quantization algorithm for compressed video data. The proposed algorithm extracts discrete cosine (DC) transform coefficients and motion vectors of blocks in a shot to estimate a cumulative color histogram of the shot and, based on the estimated histogram, design a color palette for displaying the video sequence in the shot. It significantly reduces the complexity of the generation of a palette by effectively reducing the number of training vectors used in training a palette without sacrificing the quality. The palette obtained can provide a good display quality even if zooming and panning exist in a shot. The experimental results show that the proposed method can achieve a significant signal-to-noise ratio improvement as compared with conventional video color-quantization schemes when zooming and panning are encountered in a shot.
Original languageEnglish
Pages (from-to)270-276
Number of pages7
JournalIEEE Transactions on Circuits and Systems for Video Technology
Volume13
Issue number3
DOIs
Publication statusPublished - 1 Mar 2003

Keywords

  • Color display
  • Color palette
  • Color quantization
  • Compressed domain video processing
  • Compressed video
  • Cumulative color histogram
  • DC sequence
  • MPEG

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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