A Decision Criterion to Relocate Codewords for Adaptive Vector Quantization

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In many adaptive vector quantization (AVQ) algorithms, codeword relocation is employed for quick adaptation to changes in non-stationary source statistics. However, those algorithms generally determine codeword relocation using heuristically predetermined parameters as thresholds; thereby, their performance seriously depends on parameters. This paper proposes a valid decision criterion whose threshold is automatically adjusted according to optimality of a codebook assessed from the viewpoint of the equidistortion condition. In this paper, an AVQ algorithm is also presented to verify the criterion validity. Experimental results show that the proposed AVQ algorithm can minimize expected distortion and also quickly adapt to changing non-stationary signal sources by properly relocating codewords. Accordingly, validity of the proposed criterion is clarified via experimental results.

Original languageEnglish
Title of host publication21st IASTED International Multi-Conference on Applied Informatics
Pages262-268
Number of pages7
Publication statusPublished - 2003 Dec 1
Externally publishedYes
Event21st IASTED International Multi-Conference on Applied Informatics - Innsbruck, Austria
Duration: 2003 Feb 102003 Feb 13

Publication series

NameIASTED International Multi-Conference on Applied Informatics
Volume21

Other

Other21st IASTED International Multi-Conference on Applied Informatics
Country/TerritoryAustria
CityInnsbruck
Period03/2/1003/2/13

Keywords

  • Adaptive vector quantization
  • Equidistortion principle
  • Neural networks
  • Non-stationary signal source

ASJC Scopus subject areas

  • Computer Science(all)

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