NOISE ROBUST SPEECH RECOGNITION METHOD BASED ON NOISY ACOUSTIC MODEL ADAPTATION

摘要

The present invention relates to a noise voice recognition method based on noise acoustic model adaptation. The noise voice recognition method includes the steps of: (a) extracting a recognized noise voice signal and setting initial values of channel noise and additional noise; (b) estimating an HMM parameter value with respect to the recognized noise voice signal by using a relational equation of recognized noise voice and training noise voice which is drawn by using a VTS in a cepstrum domain; (c) generating a result on recognition of the recognized noise voice by using the estimated HMM parameter value; (d) re-estimating a noise parameter through an EM process; (e) repeating step (b) by using the re-estimated noise parameter; and (f) generating a final recognition result with respect to the recognized noise voice signal by using the HMM parameter estimated in step (e).