NOISE SUPPRESSION DEVICE - MITSUBISHI ELECTRIC CORP

Title:

NOISE SUPPRESSION DEVICE

Document Type and Number:

WIPO Patent Application WO/2010/052749

Kind Code:

A1

Abstract:

For each frequency component, an output spectrum (107) is obtained by comparing the values of plural noise suppression spectra (105, 106) outputted from plural noise suppressors (4, 5), selecting the largest value, and defining the selected value as the value of the frequency component. The first noise suppressor (4) generates a noise suppression spectrum (105) by multiplying an input spectrum (102) by an amplitude suppression gain. The amplitude suppression gain is larger than most of amplitude suppression gains in the noise signal section of the second noise suppressor (5).

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Inventors:

TASAKI HIROHISA (JP)
FURUTA SATORU (JP)

Application Number:

PCT/JP2008/003162

Publication Date:

May 14, 2010

Filing Date:

November 04, 2008

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
TASAKI HIROHISA (JP)
FURUTA SATORU (JP)

International Classes:

G10L21/0208; G10L21/0232; G10L25/78; G10L25/84

Foreign References:

JP2005195955A	2005-07-21
JP2004341339A	2004-12-02
JP2004347956A	2004-12-09
JP2005195955A	2005-07-21
JP3454190B2	2003-10-06

Other References:

STEVEN F. BOLL: "Suppression of Acoustic noise in speech using spectral subtraction", IEEE TRANS. ASSP, vol. ASSP-27, no. 2, April 1979 (1979-04-01)

Attorney, Agent or Firm:

TAZAWA, Hideaki et al. (JP)
Hideaki Tazawa (JP)

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