发明名称 |
SYSTEM AND METHOD FOR NOISE ADAPTATION FOR SPEECH MODEL, AND SPEECH RECOGNITION NOISE ADAPTATION PROGRAM |
摘要 |
<P>PROBLEM TO BE SOLVED: To perform optimum clustering processing for many noise data and to estimate a speech model series for an input speech more accurately. <P>SOLUTION: A clustering result is obtained by generating a noise-superposed speech (step S1) by superposing noise on a speech under a noise-to-signal ratio condition, performing processing (step S2) wherein a mean value of speech cepstrum is subtracted as to the generated noise-superposed speech, generating a Gauss distribution model of respective noise-superposed speeches (step S3), and calculating likelihood between noise-superposed speeches and generating a likelihood matrix (step S4). An optimum model is selected (step S7) and linear conversion (step S8) is carried out so that the likelihood becomes maximum. A clustering stage and a model learning stage are applied to the noise-superposed speeches, so clustering processing of many noise data and accurate speech model series estimation can be realized. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
申请公布号 |
JP2004279466(A) |
申请公布日期 |
2004.10.07 |
申请号 |
JP20030066933 |
申请日期 |
2003.03.12 |
申请人 |
NTT DOCOMO INC;FURUI SADAHIRO |
发明人 |
CHO SHI;OTSUJI SEITA;SUGIMURA TOSHIAKI;FURUI SADAHIRO |
分类号 |
G10L15/06;G10L15/02;G10L15/14;G10L15/20 |
主分类号 |
G10L15/06 |
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