Title:
NOISE SUPPRESSING DEVICE, NOISE SUPPRESSING METHOD, AND NOISE SUPPRESSING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/070278
Kind Code:
A1
Abstract:
A noise suppressing device (100) converts an observation signal to spectral components (X1(ω, τ)) of a plurality of channels; calculates an arrival time difference (δ(ω, τ)) on the basis of spectral components of a plurality of frames in each of the spectral components of the plurality of channels; calculates a weighting factor (Wdir(ω, τ)) on the basis of the arrival time difference; estimates whether each of the spectral components of the plurality of frames is a spectral component of target sound; estimates, on the basis of this estimation result (N(ω, τ)) and the weighting factor, a weighted SN ratio of each of the spectral components of the plurality of frames; calculates a gain (G(ω, τ)) of the spectral components of the plurality of frames using the weighted SN ratio; suppresses a spectral component of an observation signal of sound other than the target sound of the spectral components of the plurality of frames using the gain to output a spectral component (S^(ω, τ)) of an output signal; and converts the spectral component of the output signal to an output signal (s^(t)) in the time domain.
Inventors:
FURUTA SATORU (JP)
Application Number:
PCT/JP2019/039797
Publication Date:
April 15, 2021
Filing Date:
October 09, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04R3/00; H04R1/40
Domestic Patent References:
| WO2012026126A1 | 2012-03-01 |
Foreign References:
| JP2009047803A | 2009-03-05 | |||
| JP2009049998A | 2009-03-05 | |||
| JP2009036810A | 2009-02-19 |
Attorney, Agent or Firm:
YAMAGATA Yoichi et al. (JP)
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