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Title:
SIGNAL PROCESSING METHOD AND DEVICE
Document Type and Number:
Japanese Patent JP2011022604
Kind Code:
A
Abstract:

To provide a signal processing method and a device achieving noise cancellation in which convergence time is short and distortion of output speech is small for input signals of a signal-to-noise ratio having a broad range at a speech input terminal or reference input terminal.

The signal processing device includes: a first adaptive filter that takes a first signal as input and generates a first pseudo signal; a first subtractor that subtracts the first pseudo signal from a second signal to supply a first differential signal as output; a second adaptive filter that takes the first signal as input to generate a second pseudo signal; a second subtractor that subtracts the second pseudo signal from the second signal to supply a second differential signal as output; a first step size control circuit that generates a first step size used in updating the first adaptive filter in accordance with a correlation between the second pseudo signal and the second differential signal; and a second step size control circuit that generates a second step size used in updating the second adaptive filter in accordance with the correlation between the first signal and the second signal.


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WO/2002/017487PARTIONED BLOCK FREQUENCY DOMAIN ADAPTIVE FILTER
WO/2002/061733METHODS AND APPARATUS FOR REDUCING NOISE ASSOCIATED WITH AN ELECTRICAL SPEECH SIGNAL
WO/2024/041512AUDIO NOISE REDUCTION METHOD AND APPARATUS, AND ELECTRONIC DEVICE AND READABLE STORAGE MEDIUM
Inventors:
SATO MIKI
SUGIYAMA AKIHIKO
Application Number:
JP2010215749A
Publication Date:
February 03, 2011
Filing Date:
September 27, 2010
Export Citation:
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Assignee:
NEC CORP
International Classes:
G10L21/0208; G10L21/0224; H03H21/00
Domestic Patent References:
JPH11231900A1999-08-27
JPH103298A1998-01-06
JPH11345000A1999-12-14
JP2000172299A2000-06-23
JPH07306695A1995-11-21
JP2001215992A2001-08-10
JPH11202894A1999-07-30
JPH07306695A1995-11-21
JP2001215992A2001-08-10
JPH0918291A1997-01-17
JPH11231900A1999-08-27
JPH103298A1998-01-06
JPH11345000A1999-12-14
JP2000172299A2000-06-23
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata



 
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