A fast adaptive-codebook search algorithm for G.723.1 speech coder

Sung Kyo Jung, Kyung Tae Kim, Young Cheol Park, Hong Goo Kang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This letter presents a new fast search algorithm for the multitap adaptive codebook used in the G.723.1 standard speech coder. In contrast with the standard method that a closed-loop pitch lag and gains for a fifth-order pitch predictor are searched simultaneously, the proposed algorithm adopts a sequential and restricted approach to determine the parameters. In other words, the proposed scheme first determines a couple of pitch lag candidates using a first-order pitch predictor and then computes the pitch gains of the fifth-order predictor within a restricted search area. Experimental results confirm that the proposed algorithm reduces the total complexity by 30.69% in the encoding process and provides speech quality equivalent to the standard method.

Original languageEnglish
Pages (from-to)75-78
Number of pages4
JournalIEEE Signal Processing Letters
Volume12
Issue number1
DOIs
Publication statusPublished - 2005 Jan 1

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All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics

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