Patent ID: 6778958
Filing Date: 2004-08-17
Classification: G10L

Abstract:
A speech recognition apparatus comprising:a transformer for transforming sequences of phonemes extracted from an utterance into one or more word sequences, and for assigning to said word sequences appearance probabilities, in accordance with which said word sequences are originally represented by said phoneme sequences; a renewer for renewing said appearance probability assigned to each of said word sequences by employing a renewal value represented by a language model corresponding to each of said word sequences; and a speech recognizer for selecting the word sequence having the highest appearance probability, by screening all said word sequences assigned appearance probabilities, according to which said word sequences are originally represented by said phoneme sequences, wherein said renewer calculates said renewal value using a first language model which is employed when each of said word sequences always includes a specific symbol as a word and a second language model which is employed in other situations to renew said appearance probabilities based on said renewal value.