Method and system for speech recognition without noise...

Details Method and system for speech recognition without noise... Method and system for speech recognition without noise...

G - Physics

10

L

G10L 15/20 (2006.01)

Patent

CA 2055749

A speech recognition system determines an input pattern as one of a series of reference patterns by calculating dissimilarities of the input pattern and the reference patterns, and selects the minimum one of the dissimilarities. That minimum one is then compared with a reject value to determine a particular reference pattern of input speech which produces the minimum dissimilarity, in order to reduce interference by noise accompanying an input speech pattern in the input pattern. A noise level is detected from an input pattern before the input speech pattern is detected, and the reject value is produced corresponding to the noise level. The minimum dissimilarity is normalized by the time duration when the input speech pattern continues to produce a normalized value. The normalized value is compared with the reject value.

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