发明申请
- 专利标题： Acoustic echo devices and methods
- 专利标题（中）： 声回声装置及方法
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申请号： US11323567申请日： 2005-12-30
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公开(公告)号： US20060147032A1公开(公告)日： 2006-07-06
- 发明人: Alan McCree , Takahiro Unno , Thierry Gall , Sebastien Guiriec
- 申请人： Alan McCree , Takahiro Unno , Thierry Gall , Sebastien Guiriec
- 主分类号： H04M9/08
- IPC分类号： H04M9/08
摘要：
Hands-free phones with echo cancellation using dual filters, one fast adapting filter and one slow adapting filter; the choice of filters includes switching with hysteresis from recent performance, and the fast adapting filter has stepsize control to limit relative filter update energy and the slow adapting filter limits filter divergence.
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