APPARATUS FOR FILTERING A NOISE BASED ON A MODEL BY COMPENSATING DISTORTION TO RECOGNIZE A VOICE, PARTICULARLY FOR EFFICIENTLY REMOVING NOISY COMPONENTS IN A VOICE SECTION

摘要

PURPOSE: An apparatus for filtering a noise based on a model by compensating distortion to recognize a voice are provided to remove a noise without distortion for voice recognition.;CONSTITUTION: A voice member probability calculator(206) calculates a voice absence probability, and a noise estimating and updating unit(208) updates the estimated noise. A first noise cancellation filter outputs a first pure voice included in the distortion through a filtering operation by using the voice absence probability and the updated estimated noise. A second noise removing filter outputs a distortion-compensated final voice signal by filtering pure voice estimation. The pure voice estimation value is obtained based on posteriori probability.;COPYRIGHT KIPO 2011