Title:
SIGNAL PROCESSING DEVICE, IMAGING DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2014/017371
Kind Code:
A1
Abstract:
Provided is a signal processing device capable of appropriately reducing noise included in an audio signal. The signal processing device includes a conversion unit for converting an audio signal to a frequency-domain signal, a subtraction unit for subtracting, from a first frequency-domain signal corresponding to a period in which the audio signal includes a predetermined type of noise, the frequency-domain signal of estimated noise estimated to reduce the predetermined type of noise, a correction signal generation unit for generating, on the basis of a second frequency-domain signal corresponding to a period in which the audio signal does not include the predetermined type of noise, a fourth frequency-domain signal used to correct a third frequency-domain signal obtained when the subtraction unit subtracts the frequency-domain signal of the estimated noise from the first frequency-domain signal, and an adder unit for adding the fourth frequency-domain signal to the third frequency-domain signal.
Inventors:
OKANO KOSUKE (JP)
Application Number:
PCT/JP2013/069490
Publication Date:
January 30, 2014
Filing Date:
July 18, 2013
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G10L21/0264; G10L21/0232; G10L25/18; H04N5/225; H04N5/232
Foreign References:
| JPH1138997A | 1999-02-12 | |||
| JP2010156742A | 2010-07-15 | |||
| JP2011095567A | 2011-05-12 | |||
| JP2002287782A | 2002-10-04 | |||
| JP2005099405A | 2005-04-14 | |||
| JP2007011330A | 2007-01-18 | |||
| JP2003140700A | 2003-05-16 | |||
| JP2011257656A | 2011-12-22 |
Attorney, Agent or Firm:
KAMATA, Hisao (JP)
Hisao Kamata (JP)
Hisao Kamata (JP)
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