Training Method of The Excitation Codebook for CELP

Takehiro Moriya, Satoshi Miki, Kazunori Mano, Hitoshi Ohmuro

Research output: Contribution to conferencePaperpeer-review

6 Citations (Scopus)

Abstract

An iterative training method is proposed for the design of random codebooks and channel code mapping tables for a CELP coder. The method is based on a structured excitation source such as a conjugate structure, pitch isynchronization, rotation of samples, time-domain sloped gain, and code mapping to channel code. Closed-loop distortion measure, that is, perceptually weighted distortion between the input and the synthesized speech, is used in all training procedures. The training improves the SNR by around 1 dB and improves subjective quality. The channel code mapping and channel-matched distortion measure increases robustness against channel error.

Original languageEnglish
Pages1155-1158
Number of pages4
Publication statusPublished - 1993
Event3rd European Conference on Speech Communication and Technology, EUROSPEECH 1993 - Berlin, Germany
Duration: 1993 Sep 221993 Sep 25

Conference

Conference3rd European Conference on Speech Communication and Technology, EUROSPEECH 1993
Country/TerritoryGermany
CityBerlin
Period93/9/2293/9/25

Keywords

  • CELP
  • code mapping
  • codebook
  • training

ASJC Scopus subject areas

  • Software
  • Linguistics and Language
  • Computer Science Applications
  • Communication

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