Method of speech recognition resistant to convolutive...

Details Method of speech recognition resistant to convolutive... Method of speech recognition resistant to convolutive...

2007-01-16

2007-01-16

Opsasnick, Michael N. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C704S256000

Reexamination Certificate

active

10251734

ABSTRACT:
A speech recognizer operating in both ambient noise (additive distortion) and microphone changes (convolutive distortion) is provided. For each utterance to be recognized the recognizer system adapts HMM mean vectors with noise estimates calculated from pre-utterance pause and a channel estimate calculated using an Estimation Maximization algorithm from previous utterances.

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