| 摘要 |
PROBLEM TO BE SOLVED: To provide a noise suppressing device which suppresses noise components included in inputted voice signals without damaging the spectrum of the voice signals. SOLUTION: The device has a frequency analyzing section 12 which is used to conduct a frequency analysis of input voice signals obtained from an input terminal 11 with a prescribed frame length and obtains an input spectrum, a noise spectrum estimating section 13 which estimates the spectrum of noise components, a multiplier 15 which multiplies the estimated noise spectrum by spectrum subtracting coefficients, a subtracter 16 which subtracts the estimated noise spectrum, that has been multiplied by the spectrum subtracting coefficients, from the input spectrum to obtain a subtraction spectrum, a clipping section 17 which conducts clipping of the subtraction spectrum to obtain a voice spectrum and a spectrum correcting section 18 which smoothes and corrects the voice spectrum on at least one of the frequency axis or the time axis and obtains output voice signals having suppressed noise components. |
