Title:
雑音抑圧装置
Document Type and Number:
Japanese Patent JP5183828
Kind Code:
B2
Abstract:
A noise suppression device includes: a power spectrum calculator converting an input signal of time domain into power spectra of frequency domain; a voice/noise determination unit determining whether the power spectra indicate voice or noise; a noise spectrum estimation unit estimating noise spectra of the power spectra; a period component estimation unit analyzing a harmonic structure constituting the power spectra and estimating periodical information about the power spectra; a weighting coefficient calculator calculating a weighting coefficient for weighting the power spectra; a suppression coefficient calculator calculating a suppression coefficient for suppressing noise included in the power spectra; a spectrum suppression unit suppressing amplitude of the power spectra in accordance with the suppression coefficient; and an inverse Fourier transformer converting the power spectra output by the spectrum suppression unit into a signal of time domain to generate a noise-suppressed signal.
Inventors:
Furuta Kun
Hirohisa Tazaki
Hirohisa Tazaki
Application Number:
JP2012534826A
Publication Date:
April 17, 2013
Filing Date:
September 21, 2010
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G10L21/0232; G10L21/0208; G10L21/0264; G10L25/90; G10L21/0216
Domestic Patent References:
| JP2008129077A | 2008-06-05 | |||
| JP2006201622A | 2006-08-03 | |||
| JP2004341339A | 2004-12-02 | |||
| JP2001344000A | 2001-12-14 | |||
| JP2006113515A | 2006-04-27 |
Foreign References:
| WO2005124739A1 | 2005-12-29 | |||
| WO2010113220A1 | 2010-10-07 |
Attorney, Agent or Firm:
Hideaki Tazawa
Hamada Hatsune
Kume Teruyo
Hideo Kawamura
Hamada Hatsune
Kume Teruyo
Hideo Kawamura