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 |
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ページ(範囲) | 397-404 |
ページ数 | 8 |
ジャーナル | NTT R and D |
巻 | 43 |
号 | 4 |
出版ステータス | Published - 1994 1月 1 |
外部発表 | はい |
ASJC Scopus subject areas
- 電子工学および電気工学