Patent ID: 8724828

Claim:
A noise suppression device which calculates a suppression coefficient for noise suppression using spectral components obtained by converting an input signal from a time domain to a frequency domain and using an estimated noise spectrum estimated from the input signal, which carries out amplitude suppression of the spectral components of the input signal using the suppression coefficient, and which generates a noise suppressed signal converted to the time domain, the noise suppression device comprising: a correction spectrum calculator that obtains statistical information reflecting a characteristic of the estimated noise spectrum and that generates a correction spectrum by correcting the estimated noise spectrum in accordance with the statistical information; a suppression quantity limiting coefficient calculator that generates a suppression quantity limiting coefficient for defining upper and lower limits of the noise suppression from the correction spectrum the correction spectrum calculator generates; and a suppression quantity calculator that controls the suppression coefficient using the suppression quantity limiting coefficient the suppression quantity limiting coefficient calculator generates.