ADPCM using a second-order switched predictor and adaptive quantizer

Vladimir Despotovic*, Zoran Peric

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

Adaptive differential pulse code modulation (ADPCM) with forward gain-adaptive quantizer and secondorder switched predictor based on correlation is presented in this article. Predictor consists of a bank of predetermined predictors for each block of speech samples, avoiding the need to solve, or quantize predictor coefficients during the coding process. The adaptation consists of switching to one of this predictors based on the values of the first and second order correlation coefficients. The theoretical model is generalization of the DPCM with the first order switched predictor for an arbitrary prediction order. Experimental results for ADPCM with the second-order four/eight state switched prediction based on correlation are provided.

Original languageEnglish
Pages (from-to)61-64
Number of pages4
JournalAdvances in Electrical and Computer Engineering
Volume11
Issue number3
DOIs
Publication statusPublished - Aug 2011
Externally publishedYes

Keywords

  • Adaptive coding
  • Correlation
  • Predictive coding
  • Signal to noise ratio
  • Speech processing

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