发明名称 |
NOISE SUPPRESSION DEVICE |
摘要 |
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.
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申请公布号 |
US2013138434(A1) |
申请公布日期 |
2013.05.30 |
申请号 |
US201013814332 |
申请日期 |
2010.09.21 |
申请人 |
FURUTA SATORU;TASAKI HIROHISA;MITSUBISHI ELECTRIC CORPORATION |
发明人 |
FURUTA SATORU;TASAKI HIROHISA |
分类号 |
G10L21/02;G10L21/0208;G10L21/0216;G10L21/0232 |
主分类号 |
G10L21/02 |
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地址 |
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