Title:
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
Document Type and Number:
WIPO Patent Application WO/2012/096073
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, a first sound-collection unit, a second sound-collection unit, 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. A second mixed sound, containing the desired voice and the noise in different proportions from the first mixed sound, is inputted to the second microphone, which outputs a second mixed signal. The first sound-collection unit is provided with a concave surface that focuses the first mixed sound onto the first microphone. The second sound-collection unit is positioned facing a different direction from the first sound-collection unit and is provided with a concave surface that focuses the second mixed sound onto the second microphone. 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. This configuration makes it possible to: collect both a desired voice and noise in an acoustic space containing both said desired voice and noise; accurately estimate the noise; and reconstruct an artificial voice similar to the desired voice.
Inventors:
ARAKAWA TAKAYUKI (JP)
SUGIYAMA AKIHIKO (JP)
SUGIYAMA AKIHIKO (JP)
Application Number:
PCT/JP2011/077996
Publication Date:
July 19, 2012
Filing Date:
December 03, 2011
Export Citation:
Assignee:
NEC CORP (JP)
ARAKAWA TAKAYUKI (JP)
SUGIYAMA AKIHIKO (JP)
ARAKAWA TAKAYUKI (JP)
SUGIYAMA AKIHIKO (JP)
International Classes:
H04R1/40; G10L15/20; G10L21/0208; H04R1/34; H04R3/00
Domestic Patent References:
| WO2009051132A1 | 2009-04-23 |
Foreign References:
| JPH07231495A | 1995-08-29 | |||
| JP2004279241A | 2004-10-07 | |||
| JPS5514827U | 1980-01-30 | |||
| JP2006525743A | 2006-11-09 | |||
| JP2004215066A | 2004-07-29 | |||
| JP2005236407A | 2005-09-02 |
Attorney, Agent or Firm:
KATO TAKASHI (JP)
Takushi Kato (JP)
Takushi Kato (JP)
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Claims: