Training algorithm of the codebooks

Takehiro Moriya; Satoshi Miki; Kazunori Mano; Jotarou Ikedo

Training algorithm of the codebooks

Takehiro Moriya, Satoshi Miki, Kazunori Mano, Jotarou Ikedo

Research output: Contribution to journal › Article › peer-review

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, including a conjugate structure, pitch period repetition, and integrated mapping to channel code. All training procedures use a closed-loop distortion measure, which minimize perceptually weighted distortion between the input and the synthesized speech. The training improves SNR by around 1 dB and improves subjective quality. The channel code mapping and channel-matched distortion measure increase robustness against channel errors.

Original language	English
Pages (from-to)	397-404
Number of pages	8
Journal	NTT R and D
Volume	43
Issue number	4
Publication status	Published - 1994 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Electrical and Electronic Engineering

Cite this

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