发明公开
EP0627825A2 Multi-channel echo cancelling method and a device thereof
失效
Mehrkanal-Echokompensationsverfahren und Vorrichtungdafür。
- 专利标题： Multi-channel echo cancelling method and a device thereof
- 专利标题（中）： Mehrkanal-Echokompensationsverfahren und Vorrichtungdafür。
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申请号： EP94108319.8申请日： 1994-05-30
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公开(公告)号： EP0627825A2公开(公告)日： 1994-12-07
- 发明人: Hirano, Akihiro, c/o NEC CORPORATION
- 申请人： NEC CORPORATION
- 申请人地址： 7-1, Shiba 5-chome Minato-ku Tokyo JP
- 专利权人： NEC CORPORATION
- 当前专利权人： NEC CORPORATION
- 当前专利权人地址： 7-1, Shiba 5-chome Minato-ku Tokyo JP
- 代理机构： VOSSIUS & PARTNER
- 优先权： JP167261/93 19930531
- 主分类号： H04B3/23
- IPC分类号： H04B3/23 ; H04M3/56 ; H04M9/08
摘要：
The present invention relates to a multi-channel echo cancelling art enabling proper operation even if using a microphone not generating propagation delay difference between channels.
The present invention comprises: a step of calculating a power of reception signal in each reception channel and selecting a reception channel of a reception signal having the biggest power; a step of generating an echo replica corresponding to an echo in each mixed signal generated by propagation of reception signals of the reception channels based on a reception signal of the reception channel selected in the previous step; and a step of cancelling the echoes from mixed signals in which the echoes are mixed by subtracting the echo replicas from the mixed signals.
The present invention comprises: a step of calculating a power of reception signal in each reception channel and selecting a reception channel of a reception signal having the biggest power; a step of generating an echo replica corresponding to an echo in each mixed signal generated by propagation of reception signals of the reception channels based on a reception signal of the reception channel selected in the previous step; and a step of cancelling the echoes from mixed signals in which the echoes are mixed by subtracting the echo replicas from the mixed signals.
公开/授权文献
- EP0627825B1 Multi-channel echo cancelling method and a device thereof 公开/授权日：2003-08-06
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