Speech recognition apparatus and method in noisy circumstances

Details Speech recognition apparatus and method in noisy circumstances Speech recognition apparatus and method in noisy circumstances

1996-10-17

1998-05-05

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704226, G10L 302, G10L 900

Patent

active

057490686

ABSTRACT:
An estimated-SN(Signal Noise)-ratio is calculated for a time-series feature vector of noise-superimposed speech by using a noise-free speech model and a noise model. A noise-superimposed model is generated based on the estimated-SN-ratio. A likelihood between the time-series feature vector of noise-superimposed speech and the noise-superimposed model is calculated to obtain likelihood information. A noise spectrum included in the noise-superimposed speech is estimated from the likelihood information.

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