Speech processing apparatus and method using a noise-adaptive PM

Details Speech processing apparatus and method using a noise-adaptive PM Speech processing apparatus and method using a noise-adaptive PM

1997-12-02

1999-09-21

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704255, 704236, G10L 506

Patent

active

059566795

ABSTRACT:
A speech processing apparatus includes a noise model production device for extracting a noise-speech interval from input speech data and producing a noise model by using the data of the extracted interval. The apparatus also includes a composite distribution production device for dividing the distributions of a speech model into a plurality of groups, producing a composite distribution of each group, and determining the positional relationship of each distribution within each group. In addition, the apparatus includes a memory for storing each composite distribution and the positional relationship of each distribution within the group, and a PMC conversion device for PMC-converting each produced composite distribution. Also provided is a noise-adaptive speech model production device for producing a noise-adaptive speech model on the basis of the composite distribution which is PMC-converted by the PMC conversion device and the positional relationship stored by the memory. Further, the apparatus includes an output device for determining and outputting a recognition result and a candidate with their likelihood for the input speech data by using the produced noise-adaptive speech model.

REFERENCES:
patent: 5787396 (1998-07-01), Komori et al.
patent: 5797116 (1998-08-01), Yamada et al.
patent: 5812975 (1998-09-01), Komori et al.

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