Patent ID: 9204218
Filing Date: 2015-12-01
Classification: G10L,H04R

Abstract:
1. A microphone sensitivity difference correction device comprising: a detection section that detects a frequency domain signal expressing a stationary noise, based on frequency domain signals of input sound signals respectively input from a plurality of microphones contained in a microphone array that have been converted into signals in a frequency domain for each frame of a plurality of frames; a first correction section that employs the frequency domain signal expressing the stationary noise to compute a first correction coefficient for correcting the sensitivity difference between the plurality of microphones for each frame, and that employs the first correction coefficient to correct the frequency domain signals for each frame; and a second correction section that employs the frequency domain signals that have been corrected by the first correction section to compute a second correction coefficient for correcting for a plurality of frequency bands the sensitivity difference between the plurality of microphones, and that employs the second correction coefficient to correct for each frequency band the frequency domain signals that have been corrected by the first correction section.