Training algorithm of the codebooks

Takehiro Moriya, Satoshi Miki, Kazunori Mano, Jotarou Ikedo

研究成果: Article査読

抄録

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.

本文言語English
ページ(範囲)397-404
ページ数8
ジャーナルNTT R and D
43
4
出版ステータスPublished - 1994 1 1
外部発表はい

ASJC Scopus subject areas

  • 電子工学および電気工学

引用スタイル