| 摘要 |
PROBLEM TO BE SOLVED: To correct the sensitivity difference between microphones quickly, even if the installation position of a microphone array is limited.SOLUTION: A detection unit 16 detects steady noise based on the signals M(f, i) and M(f, i) obtained by converting input audio signals 1 and 2, inputted from each of a plurality of microphones included in a microphone array, into signals in frequency domain for each frame. A frame unit correction unit 18 calculates sensitivity difference correction coefficients C(i) for correcting the sensitivity difference in units of frame, by using the M(f, i) and M(f, i) indicating steady noise, thus correcting the M(f, i) to M'(f, i). A frequency unit correction unit 20 calculates the sensitivity difference correction coefficients C(f, i) for correcting the sensitivity difference in units of frequency, by using M(f, i) and M'(f, i), thus correcting M'(f, i) to M"(f, i). |
