System and method for speech recognition

摘要

A system and method include an initial noise model produced based on pre-estimated noise of a service environment and an initial synthesized model of a voice containing noise. The system and method produce an utterance environment noise model from background noise of the service environment upon speech recognition as well as a sequence of feature vectors from noise-superimposed speech including an uttered voice and the background noise. The system and method also produce an adaptive model by adapting the initial synthesized model using the utterance environment noise model, the initial noise model, and a compensation model, so that the adaptive model is checked against the sequence of feature vectors to perform speech recognition. Upon performing the speech recognition, a compensation model is created upon which the signal to noise ratio between the background noise present at the time of actual utterance of a voice and the uttered voice is reflected.