Speech recognition apparatus and speech recognition method

Details Speech recognition apparatus and speech recognition method Speech recognition apparatus and speech recognition method

1997-06-13

1999-01-12

Knepper, David D.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704226, 704233, G01L 506

Patent

active

058600620

ABSTRACT:
A speech recognition apparatus and method learns in advance a plurality of kinds of noises that can occur in the environment of use to determine a plurality of noise HMMs, synthesizes these noise HMMs into one noise HMM, generates a NOVO-HMM by executing NOVO (voice mixed with noise) conversion for a speech HMM of a reference pattern by using this composite noise HMM, and uses this NOVO-HMM for a speech recognition processing. Since a plurality of noises are incorporated in the NOVO-HMM generated in this manner, the speech can be recognized with high accuracy even when the noise changes.

REFERENCES:
patent: 5721808 (1998-02-01), Minami et al.

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