UTTERANCE VERIFICATION APPARATUS AND ITS METHOD

摘要

PURPOSE: An utterance verification apparatus and a method thereof are provided, which can improve the reliability about the voice recognition result by performing the whole utterance verification about the word after the performance of the partial utterance verification about each sub word. CONSTITUTION: A sub word likelihood ratio calculator(204) calculates the sub word likelihood ratio about the divided sub word. A likelihood ratio weight applying unit(206) applies the weighted value of likelihood ratio according to the recognition reliability to the calculated sub word likelihood ratio. A word likelihood ratio calculator(208) calculates the word likelihood ratio by using the sub word likelihood ratio. A speech verification decision unit(210) decides the output of the word after the utterance verification with the calculated word likelihood ratio.