Patent ID: 9113241
Filing Date: 2015-08-18
Classification: G10L,H04R

Abstract:
1. A noise removing apparatus, comprising: an object sound emphasis section adapted to carry out an object sound emphasis process for observation signals of first and second microphones disposed in a predetermined spaced relationship from each other to produce an object sound estimation signal; a noise estimation section adapted to carry out a noise estimation process for the observation signals of said first and second microphones to produce a noise estimation signal; a post filtering section adapted to remove noise components remaining in the object sound estimation signal produced by said object sound emphasis section by a post filtering process using the noise estimation signal produced by said noise estimation section; a correction coefficient calculation section adapted to calculate, for each frequency, a correction coefficient for correcting the post filtering process to be carried out by said post filtering section based on the object sound estimation signal produced by said object sound emphasis section and the noise estimation signal produced by said noise estimation section; and a correction coefficient changing section adapted to change those of the correction coefficients calculated by said correction coefficient calculation section which belong to a frequency band which suffers from spatial aliasing such that a peak which appears at a particular frequency is suppressed.