Patent ID: 7006969
Filing Date: 2006-02-28
Classification: G10L

Abstract:
1. A method of recognizing a received phoneme using a stored plurality of phoneme classes, each of the plurality of phoneme classes comprising class phonemes, the method comprising: (A) training the class phonemes, the training comprising, for each class phoneme: [x 1 x 2 . . . x m ]=[u 1 u 2 . . . u m ]ΛV t , where x k is a k th acoustic vector for a corresponding stored phoneme, u k is the corresponding orthogonal vector and Λ and V are diagonal and unitary matrices, respectively; and (B) recognizing the received phoneme by: [y k ]=[z k ]ΛV t , where y k is a k th acoustic vector for a corresponding received phoneme, z k is the corresponding orthogonal vector and Λ and V are diagonal and unitary matrices, respectively; (8) determining a first distance associated with the orthogonal form of the expanded received-signal vector and a second distance associated respectively with each orthogonal form of the expanded stored-phoneme vectors; and (9) recognizing the received phoneme according to a comparison of the first distance with the second distance.