Title:
音判定装置、音判定方法、及び、音判定プログラム
Document Type and Number:
Japanese Patent JP4545233
Kind Code:
B2
Abstract:
The noise removal device includes plural microphones, a time axis adjustment unit, an FFT analysis unit, and a noise removal processing unit, and determines frequency signals of a to-be-extracted sound by performing a threshold judgment on each of the phase distances, of the mixed sounds each received through a corresponding one of the microphones, in the case where the phases are expressed by the expression ψ′(t)=mod 2π(ψ(t)−2πft) (f denotes a reference frequency).
Inventors:
Shinichi Yoshizawa
Yoshihisa Nakato
Yoshihisa Nakato
Application Number:
JP2010510597A
Publication Date:
September 15, 2010
Filing Date:
September 25, 2009
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G10L15/20; G10L21/0232; G10L25/03; G10L25/51
Domestic Patent References:
| JPH10313498A | 1998-11-24 | |||
| JP2006267444A | 2006-10-05 | |||
| JP2008185834A | 2008-08-14 | |||
| JP3174777B2 | 2001-06-11 |
Attorney, Agent or Firm:
Hiromori Arai