发明授权
US07496482B2 Signal separation method, signal separation device and recording medium
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信号分离方法,信号分离装置和记录介质
- 专利标题: Signal separation method, signal separation device and recording medium
- 专利标题(中): 信号分离方法,信号分离装置和记录介质
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申请号: US10539609申请日: 2004-09-01
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公开(公告)号: US07496482B2公开(公告)日: 2009-02-24
- 发明人: Shoko Araki , Hiroshi Sawada , Shoji Makino , Ryo Mukai
- 申请人: Shoko Araki , Hiroshi Sawada , Shoji Makino , Ryo Mukai
- 申请人地址: JP Tokyo
- 专利权人: Nippon Telegraph and Telephone Corporation
- 当前专利权人: Nippon Telegraph and Telephone Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权: JP2003-309720 20030902; JP2004-195818 20040701; JP2004-195867 20040701
- 国际申请: PCT/JP2004/012629 WO 20040901
- 国际公布: WO2005/024788 WO 20050317
- 主分类号: G06F15/00
- IPC分类号: G06F15/00
摘要:
A method and a device for signal separation. First, values of signals observed by M sensors are transformed into frequency domain values, and these frequency domain values are used to calculate relative values of the observed values between the sensors at each frequency. These relative values are clustered into N clusters, and the representative value of each cluster is calculated. Then, using these representative values, a mask is produced to extract the values of the signals emitted by V (1≦V≦M) signal sources from the frequency-domain signal values, and this mask is applied to the frequency-domain signal values. After that, if V=1 then the limited signal is output directly as a separated signal, while if V≧2 then the separated values are obtained by separating this limited signal with separation techniques such as ICA.