JPEG2000 block-wise truncation of quality layers

F. Auli-Llinas*, D. Taubman

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

Quality scalability and quality progression are fundamental features of JPEG2000, achieved through the use of quality layers that are optimally formed in the encoder by rate-distortion optimization techniques. The successive truncation and decoding of the codestream at quality layers boundaries achieves optimal rate-distortion representations of the image, and when the image is interactively transmitted, quality layers supply successive quality refinements for the transmitted windows of interest. Although quality layers are a sound mechanism of JPEG2000, their practical use must consider that codestreams containing an inadequate allocation of layers may greatly penalize the coding performance, especially when few quality layers are available and truncations at any point rather than at quality layers boundaries are carried out. In interactive image transmission, real-time video rendering, and transcoding applications, for instance, this issue represents an unacceptable shortcoming. This paper introduces a block- wise truncation of quality layers that, requiring negligible computational resources, enhances the coding performance of codestreams containing an inadequate layer allocation. Experimental results suggest that the proposed strategy achieves near-optimal results even when the codestream contains a single quality layer.

Original languageAmerican English
Pages (from-to)711-716
Number of pages6
JournalIET Conference Publications
Issue number543 CP
DOIs
Publication statusPublished - 2008

Keywords

  • Image coding
  • Image communication
  • JPEG2000
  • Rate-distortion optimization

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