VOICE RECOGNITION METHOD AND DEVICE AND PROGRAM THEREOF

PROBLEM TO BE SOLVED: To provide a voice recognition method capable of performing a recalculation of a recognition score excluding recognition error words.SOLUTION: The voice recognition method performs an N-best candidate score recalculation process that includes the steps of: calculating the degree of association in a past speech which is an average value of the degree of association of a pair of two words in the past speech and the degree of association in future speech which is an average value of the degree of association of the pair of two words in a future speech; calculating the past-present degree of association of the word pairs between the present speech words included in an entire N-best ranking and the entire past speech words and the present-future degree of association of the word pairs between the present speech words included in an entire N-best ranking and the entire future speech words; and evaluating the relevancy in the past speech word set and the relevancy in the future speech word set by comparing the degree of association in the past speech and a threshold value and comparing the future speech degree of association and a threshold value. When relevancy is found, the recognition score is re-calculated while considering the values of the past-present degree of association and the present-future degree of association.