Speech recognition method and speech recognition apparatus

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

1998-10-22

2000-05-23

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704226, 704256, G10L 1300, G10L 1500

Patent

active

060675136

ABSTRACT:
A speech recognition method of recognizing an input speech in a noisy environment by using a plurality of clean speech models is provided. Each of the clean speech models has a clean speech feature parameter S representing a cepstrum parameter of a clean speech thereof. The speech recognition method has the processes of: detecting a noise feature parameter N representing a cepstrum parameter of a noise in the noisy environment, immediately before the input speech is input; detecting an input speech feature parameter X representing a cepstrum parameter of the input speech in the noisy environment; calculating a modified clean speech feature parameter Y according to a following equation:

REFERENCES:
patent: 4897878 (1990-01-01), Boll et al.
patent: 5148489 (1992-09-01), Erell et al.
patent: 5742928 (1998-04-01), Suzuki
patent: 5893059 (1999-04-01), Raman
patent: 5924065 (1999-07-01), Eberman et al.
F. Martin et al., "Recognition of Noisy Speech by Composition of Hidden Markov Models", Technical Report of IEICE, pp. 9-16, 1992.

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