Continuous speech processing system

Details Continuous speech processing system Continuous speech processing system

G - Physics

10

L

G10L 7/08 (1990.01)

Patent

CA 2085895

2085895 9200585 PCTABS00010 The speech (40) to be recognized is converted from utterances to frame data sets (42), which are smoothed (46) to generate a smooth frame model over a predetermined number of frames. A resident vocabulary is stored within the computer (50) as clusters of word models which are acoustically similar over a succession of frame periods. A cluster socre is generated by the system, which score inlcudes the likelihood of the smooth frames evaluated using a probability model for the cluster against which the smooth frame model is being compared. Cluster sets having cluster scores below a predetermined acoustic threshold are removed from further consideration. The remaining cluster sets are unpacked for determination of a word score for each unpacked word. These word scores are used to identify those words which are above a second predetermined threshold to define a word list which is sent to a recognizer for a more lengthy word match.

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