JPEG2000 quality scalability without quality layers

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29 Citations (Scopus)

Abstract

Quality scalability is a fundamental feature of JPEG2000, achieved through the use of quality layers that are optimally formed in the encoder by rate-distortion optimization techniques. Two points, related with the practical use of quality layers, may need to be addressed when dealing with JPEG2000 code-streams: 1) the lack of quality scalability of code-streams containing a single or few quality layers and 2) the rate-distortion optimality of windows of interest transmission. Addressing these two points, this paper proposes a mechanism that, without using quality layers, provides competitive quality scalability to code-streams. Its main key-feature is a novel characterization of the code-blocks rate-distortion contribution that does not use distortion measures based on the original image, or related with the encoding process. Evaluations against the common use of quality layers, and against a theoretical optimal coding performance when decoding windows of interest or when decoding the complete image area, suggest that the proposed method achieves close to optimal results. © 2006 IEEE.
Original languageEnglish
Article number4472173
Pages (from-to)923-936
JournalIEEE Transactions on Circuits and Systems for Video Technology
Volume18
Issue number7
DOIs
Publication statusPublished - 1 Jul 2008

Keywords

  • Interactive image transmission
  • JPEG2000 standard
  • Quality scalability
  • Rate-distortion optimization

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