SPEECH RECOGNITION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a speech recognition device capable of precise recognition while following up individual variations of noise etc., in real time. SOLUTION: A speech recognition system includes a plurality of sound model groups 210 and 214 which are optimized for decoding of spoken speeches in different utterance environments; a feature quantity calculation part which calculates a prescribed sound feature quantity from an input speech; a noise adaptation processing part 350 which generates, on the basis of the sound feature quantity of an input speech, an adapted sound model adapted to the utterance environment of the input speech through mixed weight adaptation of the plurality of sound model groups 210 and 214; decoder parts 356 and 358 which decode the input speech by using the adapted sound model and output a plurality of hypotheses; and a hypothesis integration part which integrates the plurality of hypotheses that the decoder parts 356 and 358 output to output a speech recognition result. COPYRIGHT: (C)2005,JPO&NCIPI