Patent ID: 8270633
Filing Date: 2012-09-18
Classification: G10L

Abstract:
1. A noise suppressing apparatus comprising: a first unit configured to convert a temporal waveform of a predetermined temporal width into frequency components each composed of an amplitude and a phase; a second unit configured to calculate a band power for each frequency band, based on the amplitude components; a third unit configured to predict a noise power for each frequency band, based on the band powers; a fourth unit configured to calculate a first signal-to-noise ratio for each frequency band and a second signal-to-noise ratio for an entire frequency band, based on the noise powers and the band powers; a fifth unit configured to calculate gains for noise suppression, based on the first signal-to-noise ratios and the second signal-to-noise ratio; a sixth unit configured to weight the amplitude components, based upon the gains; and a seventh unit configured to produce the temporal waveform from the phase components and the weighted amplitude components, wherein the fifth unit comprises: