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    Multi-channel echo cancelling method and a device thereof
    1.
    发明公开
    Multi-channel echo cancelling method and a device thereof 失效
    Mehrkanal-Echokompensationsverfahren und Vorrichtungdafür。

    公开(公告)号：EP0627825A2

    公开(公告)日：1994-12-07

    申请号：EP94108319.8

    申请日：1994-05-30

    申请人： NEC CORPORATION

    发明人： Hirano, Akihiro, c/o NEC CORPORATION

    IPC分类号： H04B3/23 ,  H04M3/56 ,  H04M9/08

    CPC分类号： G10K11/178 ,  G10K2210/108 ,  G10K2210/3012 ,  G10K2210/505 ,  H04M9/082

    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.

    摘要翻译： 本发明涉及即使使用不产生通道之间的传播延迟差的麦克风也能够适当操作的多通道回波消除技术。 本发明包括：计算每个接收信道中的接收信号的功率并选择具有最大功率的接收信号的接收信道的步骤; 基于在前一步骤中选择的接收信道的接收信号，生成通过接收信道的接收信号的传播产生的每个混合信号中与回波相对应的回波复制品的步骤; 以及通过从混合信号中减去回波复制品来消除来自混合回波的混合信号的回波的步骤。