Data processing: speech signal processing – linguistics – language – Speech signal processing – Application
Patent
1996-12-16
2000-05-09
Dorvil, Richemond
Data processing: speech signal processing, linguistics, language
Speech signal processing
Application
704251, 455563, G10L 906
Patent
active
060616547
ABSTRACT:
A method and apparatus for recognizing an identifier entered by a user. A caller enters a predetermined identifier through a telephone handset. A signal representing the entered identifier is transmitted to a remote recognizer, which responds to the signal by producing a recognized output intended to match the entered identifier. The present invention compares this recognized identifier with a list of valid reference identifiers to determine which one of these reference identifiers most likely matches the entered identifier. In performing this determination, the present invention employs a confusion matrix, which is an arrangement of probabilities that indicate the likelihood that a given character in a particular character position of the reference identifier would be recognized by the recognizer as a character in the corresponding character position of the recognized identifier. This determination yields an identifier recognition probability for every reference identifier, and the present invention selects the reference identifier with the highest identifier recognition probability as most likely corresponding to the spoken identifier. The invention is also provided with the capability of improving the recognition accuracy of the confusion matrix by eliminating from consideration the most often confused characters.
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Brown Deborah W.
Goldberg Randy G.
Modi Piyush C.
Rosinski Richard R.
Sachs Richard M.
AT&T Corp.
Dorvil Richemond
Sofocleous M. David
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