Continuous speech recognition method for improving false alarm r

Details Continuous speech recognition method for improving false alarm r Continuous speech recognition method for improving false alarm r

1978-04-27

1980-12-23

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

179 1SA, G10L 100

Patent

active

042413290

ABSTRACT:
A speech recognition method for detecting and recognizing one or more keywords in a continuous audio signal is disclosed. Each keyword is represented by a keyword template representing one or more target patterns, and each target pattern comprises statistics of each of at least one spectrum selected from plural short-term spectra generated according to a predetermined system for processing of the incoming audio. The incoming audio spectra are compared with the target patterns of the keyword templates and candidate keywords are selected according to a predetermined decision process. In post-decision processing, concatentation techniques, based upon a likelihood ratio test, for rejecting false alarms are disclosed. Post-decision processing can include also a prosodic test to enhance the effectiveness of the recognition apparatus.

REFERENCES:
patent: 3544894 (1970-12-01), Hartwell et al.
patent: 3946157 (1976-03-01), Dreyfus
patent: 4038503 (1977-07-01), Moshier

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