Method and system for speech recognition without noise interfere

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

1994-02-24

1995-05-16

Knepper, David D.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

395 2, 395 221, 395 24, 381 42, G10L 500

Patent

active

054168872

ABSTRACT:
In a speech recognition system for deciding an input pattern as one of reference patterns by calculating dissimilarities of the input pattern and the reference patterns and selecting the minimum one of the dissimilarities which is then compared with a reject value to decide the input speech as a particular reference pattern 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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