Title:
SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND SIGNAL PROCESSING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2012/049986
Kind Code:
A1
Abstract:
To achieve sufficient noise cancellation when a reference signal cannot be captured in the proximity of a noise source. The present invention is characterized in being provided with first input means for inputting a first mixed signal in which a first signal and a second signal are mixed, second input means for inputting a second mixed signal in which the first signal and the second signal are mixed in a ratio different from the first mixed signal, delay means for delaying the first mixed signal to generate a delayed first mixed signal with a delay amount based on transmission distance from the generation source of the second signal to the second input means, subtracting means for subtracting a pseudo second signal which has been estimated to be mixed in with the first mixed signal from the delayed first mixed signal to output an estimated first signal, and an adaptive filter which uses a coefficient updated on the basis of the estimated first signal with respect to the second mixed signal to obtain a pseudo second signal.
Inventors:
SUGIYAMA AKIHIKO (JP)
Application Number:
PCT/JP2011/072689
Publication Date:
April 19, 2012
Filing Date:
September 26, 2011
Export Citation:
Assignee:
NEC CORP (JP)
SUGIYAMA AKIHIKO (JP)
SUGIYAMA AKIHIKO (JP)
International Classes:
H04R3/00; G10L21/0208; H04B3/23; G10L21/0216
Foreign References:
| JPH05344011A | 1993-12-24 | |||
| JP2005057437A | 2005-03-03 | |||
| JP2004023404A | 2004-01-22 | |||
| JPH0690492A | 1994-03-29 |
Attorney, Agent or Firm:
SHIMOSAKA, NAOKI (JP)
Naoki Shimosaka (JP)
Naoki Shimosaka (JP)
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Claims: