发明公开
- 专利标题： ECHO ERASE DEVICE
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申请号： EP06711810.9申请日： 2006-01-17
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公开(公告)号： EP1976139A1公开(公告)日： 2008-10-01
- 发明人: YANO, Atsuyoshi, c/o Mitsubishi Electric Corporation , KAJIYAMA, Ikuo, c/o Mitsubishi Electric Corporation
- 申请人： MITSUBISHI DENKI KABUSHIKI KAISHA
- 申请人地址： 7-3, Marunouchi 2-chome Chiyoda-ku, Tokyo 100-8310 JP
- 专利权人： MITSUBISHI DENKI KABUSHIKI KAISHA
- 当前专利权人： MITSUBISHI DENKI KABUSHIKI KAISHA
- 当前专利权人地址： 7-3, Marunouchi 2-chome Chiyoda-ku, Tokyo 100-8310 JP
- 代理机构： Pfenning, Meinig & Partner GbR
- 国际公布： WO2007083349 20070726
- 主分类号： H04B3/20
- IPC分类号： H04B3/20 ; H04B3/23 ; H04M1/60
摘要：
A state deciding unit 2 makes a decision of double talk when both received signal and transmission signal are in a speech burst, and when the amount of reduction in an echo removal level per prescribed time period exceeds a predetermined threshold, the echo removal level being represented as a level difference between the transmission signal and a residual signal passing through the echo elimination by an adaptive filter 1, and when the amount of changes of the signal level of the received signal is less than a prescribed reference value.
公开/授权文献
- EP1976139B1 ECHO ERASE DEVICE 公开/授权日：2014-10-08
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