A speech recognizer

Details A speech recognizer A speech recognizer

G - Physics

10

L

G10L 15/14 (2006.01) G10L 5/06 (1995.01)

Patent

CA 2151330

A speech recognizer performs recognition of input speech by analyzing the input speech at a predetermined time interval, extracting feature vectors and calculating a likelihood value of a reference pattern model of each category to be recognized. A first probability calculation means calculates a probability that a first hidden Markov model having an internal state number as an output symbol for each of the categories to be recognized outputs an internal state number. A second probability calculation means calculates a probability that a second hidden Markov model having transition probabilities of internal state number and feature vector output probability distribution for each of the respective internal state numbers, outputs a feature vector. A likelihood value calculation means calculates a likelihood value of a reference pattern model of the category to be recognized by using outputs of the first and second probability calculation means.

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