Patent ID: 6662159
Filing Date: 2003-12-09
Classification: G10L

Abstract:
A recognition apparatus for recognizing speech data by comparing an unknown word in speech data with data of known words without learning a model for recognition, comprising:obtaining means for obtaining a state having the maximum likelihood for each part of the speech data, from plural states employed in a state transition model for known words, to be employed in speech recognition of known words; ergodic model preparation means for preparing an ergodic model of an unknown word from the obtained states having the maximum likelihood, the obtained states being numbered in a description inserted in a portion where a processing for the unknown word is desired in a recognition grammar; calculation means for calculating a likelihood for an unknown word in the speech data by multiplying the maximum likelihood of each state by a transition probability commonly used for the entire transitions in unknown words; and recognition means for effecting recognition of said speech data based on the likelihood calculated by the calculation means.