Invention Grant
- Patent Title: Noise reduction apparatus and noise reducing method
- Patent Title (中): 降噪装置和降噪方法
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Application No.: US10851701Application Date: 2004-05-20
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Publication No.: US07783481B2Publication Date: 2010-08-24
- Inventor: Kaori Endo , Takeshi Otani , Mitsuyoshi Matsubara , Yasuji Ota
- Applicant: Kaori Endo , Takeshi Otani , Mitsuyoshi Matsubara , Yasuji Ota
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Katten Muchin Rosenman LLP
- Priority: JP2003-404595 20031203
- Main IPC: G10L21/02
- IPC: G10L21/02
Abstract:
A noise reduction apparatus includes an analysis unit for converting input into a signal of a frequency area, a suppression unit for suppressing the signal, and a synthesis unit for synthesizing a signal of a time area. The apparatus further includes an estimation unit for estimating, using the output of the analysis unit, information corresponding to at least pure voice element excluding noise element in an input voice signal as voice information which is the basic voice information for calculation of a suppression gain of a signal, and a unit for calculating a suppression gain corresponding to the output of the estimation unit and the analysis unit and providing it for the suppression unit.
Public/Granted literature
- US20050143988A1 Noise reduction apparatus and noise reducing method Public/Granted day:2005-06-30
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