AUDIO-PROCESSING DEVICE, CONTROL METHOD THEREFOR, RECORDING MEDIUM CONTAINING CONTROL PROGRAM FOR SAID AUDIO-PROCESSING DEVICE, VEHICLE PROVIDED WITH SAID AUDIO-PROCESSING DEVICE, INFORMATION-PROCESSING DEVICE, AND INFORMATION-PROCESSING SYSTEM

Title:

Document Type and Number:

WIPO Patent Application WO/2012/096074

Kind Code:

A1

Abstract:

This device is an audio-processing device that obtains an artificial voice from a mixed sound containing a desired voice and noise. Said audio-processing device is characterized by the provision of a first microphone, a second microphone, and a noise-suppression circuit. A first mixed sound containing a desired voice and noise is inputted to the first microphone, which outputs a first mixed signal. The second microphone is open to the same acoustic space as the first microphone and is positioned at a focus of a quadric or approximately-quadric surface that forms part of the boundary of the acoustic space. A second mixed sound, which contains the desired voice and the noise in different proportions from the first mixed sound and includes the desired voice and noise reflected from the boundary surface, is inputted to the second microphone, which outputs a second mixed signal. The noise-suppression circuit suppresses an estimated noise signal on the basis of the first and second mixed signals and outputs an artificial voice signal.

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Inventors:

ARAKAWA TAKAYUKI (JP)
SUGIYAMA AKIHIKO (JP)

Application Number:

PCT/JP2011/077997

Publication Date:

July 19, 2012

Filing Date:

December 03, 2011

Export Citation:

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Assignee:

NEC CORP (JP)
ARAKAWA TAKAYUKI (JP)
SUGIYAMA AKIHIKO (JP)

International Classes:

H04R3/00; G10L15/20; G10L21/0208; H04R1/34; H04R1/40

Domestic Patent References:

WO2009051132A1

2009-04-23

Foreign References:

JP2004279241A	2004-10-07
JP2006108986A	2006-04-20
JPH07231495A	1995-08-29
JP2004215066A	2004-07-29

Attorney, Agent or Firm:

KATO TAKASHI (JP)
Takushi Kato (JP)

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Claims:

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