| 摘要 |
<p>A noise suppressing device provided calculates a voice spectrum and a noise spectrum from an input voice, and calculates a gain on the basis of the voice spectrum and the noise spectrum thereby to suppress the noise of the input voice by using the gain calculated. The noise suppressing device is characterized by comprising a first frame division unit (101) for dividing the input voice into frames of a predetermined frame length, a second frame division unit (104) for dividing the input voice into frames of a frame length longer than that of the first frame division unit (101), a second conversion unit (105) for spectrally converting the input voice frame-divided by the second frame division unit (104), a smoothing unit (106) for smoothing the spectrum converted by the second conversion unit (105), in a frequency direction, and a gain calculation unit (107) for calculating a gain on the basis of the spectrum smoothed by the smoothing unit (106) and the noise spectrum.</p> |
