Patent ID: 6253180
Filing Date: 2001-06-26
Classification: G10L

Abstract:
A speech recognition apparatus, comprising:an adaptation utterance storage section for storing adaptation utterances of a new speaker;a speaker independent hidden Markov model storage section for storing speaker independent hidden Markov models prepared in advance;a hidden Markov model learning section for performing hidden Markov model learning using the adaptation utterances and the speaker independent hidden Markov models;a learned hidden Markov model storage section for storing learned hidden Markov models obtained as an output of said hidden Markov model learning section;a subtraction section for calculating finite differences between parameters of the learned hidden Markov models and parameters of the speaker independent hidden Markov models and outputting the calculated differences as first finite differences;a first finite difference storage section for storing the first finite differences;a prediction parameter storage section for storing parameters of a prediction function;a prediction section for predicting second finite differences using the first finite differences and the prediction parameters;a second finite difference storage section for storing the second finite differences outputted from said prediction section;an addition section for adding the second finite differences and the parameters of the speaker independent hidden Markov models to calculate parameters of the specific speaker hidden Markov models of the new speaker, anda specific speaker hidden Markov model storage section for storing the specific speaker hidden Markov models of the new speaker outputted from said addition section.