Patent
1995-04-10
1998-06-30
Tsang, Fan S.
395 265, 395 252, G01L 500
Patent
active
057746281
ABSTRACT:
This is an automated speech recognition system, the system comprising: an input device for receiving voice signals; a means for computing the voice signals into stochastic RGDAGs and individual grammars; a search engine that directly processes the stochastic RGDAGs; a means for adding the individual grammars within the RGDAG; a means for replacing the individual grammars within the RGDAG; and a means for deleting the individual grammars within the RGDAG. The system can include a means for adding modified grammars within RGDAGs; a means for linking a terminal symbol from a first grammar to a start symbol in a second grammar; a means for finding a maximum depth of each symbol in the RGDAG; a means for determining if the system requires parse information for the grammar by looking for ancestor symbols; a means for specifing a plurality of RGs within the RGDAGs as starting points for the search engine; and a means for returning a parse through each of a plurality of RGs in the RGDAGs for a recognized utterance. Other devices, systems and methods are also disclosed.
REFERENCES:
patent: 4156868 (1979-05-01), Levinson
patent: 5509104 (1996-04-01), Lee et al.
Schmandt et al., ("Augmenting a Window System With Speech Input", Computer Magazine, Aug. 1990, vol. 23, Issue 8, pp. 50-56.
Brady III Wade James
Donaldson Richard L.
Texas Instruments Incorporated
Troike Robert L.
Tsang Fan S.
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