Patent ID: 7660717
Filing Date: 2010-02-09
Classification: G10L

Abstract:
1. A speech recognition apparatus comprising: a characteristic quantity extraction unit for extracting a characteristic quantity of an inputted speech to be recognized, wherein said apparatus performs speech recognition by matching between a predetermined speech and a phoneme hidden Markov model of speech data previously recorded; a composite model generation unit for generating a composite model by synthesizing the phoneme hidden Markov model of speech data and a hidden Markov model of noise data previously recorded; and a speech recognition unit for recognizing the inputted speech by matching the characteristic quantity being extracted in the characteristic quantity extraction unit from the inputted speech, to the composite model generated in the composite model generation unit, wherein the speech recognition unit executes matching between the characteristic quantity of the inputted speech and the composite model for each of adequate segments defined by punctuating a speech sequence in the inputted speech, and wherein the speech recognition unit selects the composite model to be matched to the characteristic quantity of the inputted speech independently of each speech frame thereof and executes matching between the characteristic quantity of the inputted speech and the composite model.