Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1988-03-30
1991-04-02
Shaw, Dale M.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 41, G10L 500
Patent
active
050052039
ABSTRACT:
A method of recognizing continuously spoken words in which, during the speech recognition, speech values derived from the speech signal are compared with comparison values of the individual words of a given vocabulary. In order to reduce the rate of recognition errors, it is essentially known to take into account speech models, which consequently admit only selected sequences of words. From the theory of the formal languages, a class of speech models designated as "context-free grammar" is known, which represents a comparatively flexible speech model. For the use of this speech model in the technical process of recognition of a speech signal two lists are now utilized, which indicate the assignment between words and given syntactical classes and the assignment of these classes to, as the case may be, two other classes. Both lists are used at each new speech signal in that there is constantly considered backwards, which class explains most clearly the preceding speech section. At the end of the speech signal, starting from the class indicating the whole sentence, the sequence of the words can be followed backwards, which has yielded the smallest total distance sum and which moreover fits into the speech model given by the two lists.
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Franzblau Bernard
Knepper David D.
Shaw Dale M.
U.S. Philips Corporation
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