The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2014
Filed:
Dec. 19, 2011
Takeshi Otani, Kawasaki, JP;
Taro Togawa, Kawasaki, JP;
Masanao Suzuki, Kawasaki, JP;
Yasuji Ota, Kawasaki, JP;
Takeshi Otani, Kawasaki, JP;
Taro Togawa, Kawasaki, JP;
Masanao Suzuki, Kawasaki, JP;
Yasuji Ota, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An audio signal processing system including a time-frequency conversion unit which converts an audio signal in time domain into frequency domain in frame units so as to calculate a frequency spectrum of the audio signal, a spectral change calculation unit which calculates an amount of change between a frequency spectrum of a first frame and a frequency spectrum of a second frame before the first frame based on the frequency spectrum of the first frame and the frequency spectrum of the second frame, and a judgment unit which judges the type of the noise which is included in the audio signal of the first frame in accordance with the amount of spectral change.