公开(公告)号：US20140056423A1

公开(公告)日：2014-02-27

申请号：US14110938

申请日：2013-02-07

申请人： Tsuyoki Nishikawa ,  Hiroki Furukawa ,  Takeo Kanamori

发明人： Tsuyoki Nishikawa ,  Hiroki Furukawa ,  Takeo Kanamori

IPC分类号： H04B3/23

CPC分类号： H04B3/23 ,  H04M9/082 ,  H04R3/02 ,  H04R27/00

摘要： An echo cancellation apparatus cancels an echo signal included in a second speech signal including the echo signal of a first speech signal, and includes: a first echo replica generating unit generating a first echo replica by processing the first speech signal through a filter whose characteristic is equalized with a acoustic transfer function of amplified sound; a first echo cancelling unit generating and providing a first echo-cancelled signal by subtracting from the second speech signal the first echo replica generated by the first echo replica generating unit; and a filter updating unit generating a nonlinear-converted echo-cancelled signal by performing nonlinear conversion on the first echo-cancelled signal generated by the first echo cancelling unit, and updating the filter characteristic thereby equalizing the filter characteristic with the acoustic transfer function, using the nonlinear-converted echo-cancelled signal, the first speech signal, and a norm of the first speech signal.

摘要翻译： 回波消除装置消除包括第一语音信号的回波信号的第二语音信号中包括的回波信号，并且包括：第一回波复制产生单元，其通过滤波器处理第一语音信号，该滤波器的特征是 均衡放大声音的声传递函数; 第一回波消除单元，通过从第二语音信号中减去由第一回波复制产生单元生成的第一回波复制品，生成并提供第一回波消除信号; 以及滤波器更新单元，通过对由第一回波消除单元生成的第一回波消除信号进行非线性转换，生成非线性转换的回波消除信号，并且更新滤波器特性，从而利用声学传递函数来均衡滤波器特性，使用 非线性转换的回波消除信号，第一语音信号和第一语音信号的范数。

公开(公告)号：US20130016820A1

公开(公告)日：2013-01-17

申请号：US13544514

申请日：2012-07-09

申请人： Shinichi TAKAYAMA ,  Tsuyoki Nishikawa

发明人： Shinichi TAKAYAMA ,  Tsuyoki Nishikawa

IPC分类号： H04M3/42 ,  H04M9/08

CPC分类号： H04B3/23

摘要： An echo cancellation apparatus is connectable to a speaker configured to output speaker signals and a microphone configured to receive a sound from the speaker and including a plurality of microphone elements. The echo cancellation apparatus includes: a generating unit configured to generate a plurality of sensitivity signals having different sensitivity patterns which represent directionality of the microphone, based on a plurality of microphone signals obtained from the respective microphone signals; a delay estimating unit configured to determine a shortest delay time as an estimated delay time, the shortest delay time being a shortest one of delay times between the speaker signals and the microphone signals, the delay times being obtained from the respective sensitivity signals; and an echo suppressing unit configured to suppress echoes of the plurality of microphone signals using the estimated delay time.

摘要翻译： 回声消除装置可连接到被配置为输出扬声器信号的扬声器和被配置为从扬声器接收声音并且包括多个麦克风元件的麦克风。 回波消除装置包括：生成单元，被配置为基于从各个麦克风信号获得的多个麦克风信号，生成具有表示麦克风的方向性的不同灵敏度图案的多个灵敏度信号; 延迟估计单元，被配置为将最短延迟时间确定为估计延迟时间，所述最短延迟时间是所述扬声器信号和所述麦克风信号之间的延迟时间中最短的延迟时间，所述延迟时间是从各个灵敏度信号获得的; 以及回波抑制单元，被配置为使用所估计的延迟时间来抑制所述多个麦克风信号的回波。

公开(公告)号：US08189765B2

公开(公告)日：2012-05-29

申请号：US11822515

申请日：2007-07-06

申请人： Tsuyoki Nishikawa ,  Takeo Kanamori ,  Koichiro Mizushima

发明人： Tsuyoki Nishikawa ,  Takeo Kanamori ,  Koichiro Mizushima

IPC分类号： H04M9/08 ,  A61F11/06 ,  H04B15/00

CPC分类号： H04M9/082

摘要： A multichannel echo canceller according to the present invention includes an echo cancellation section which receives loudspeaker input signals sp1, sp2 including a second acoustic signal to be respectively inputted to a plurality of loudspeakers 10, 20 provided in a first location and detection signals m1, m2 detected by a plurality of microphones 11, 21 provided in the first location; separates a first acoustic signal and a second acoustic signal, which are included in the detection signals m1, m2, by performing signal processing based on an independent component analysis; cancels as an echo the second acoustic signal, which is included in the detection signals m1, m2, by outputting only the separated first acoustic signal to a plurality of loudspeakers 30, 40 provided in a second location.

摘要翻译： 根据本发明的多通道回波消除器包括回波消除部分，其接收扬声器输入信号sp1，sp2，包括分别输入到设置在第一位置的多个扬声器10,20的第二声信号，以及检测信号m1，m2 由设置在第一位置的多个麦克风11,21检测; 通过执行基于独立分量分析的信号处理来分离包含在检测信号m1，m2中的第一声信号和第二声信号; 通过仅将分离的第一声信号输出到设置在第二位置的多个扬声器30,40，来将包含在检测信号m1，m2中的第二声信号取回。

公开(公告)号：US20080008333A1

公开(公告)日：2008-01-10

申请号：US11822515

申请日：2007-07-06

申请人： Tsuyoki Nishikawa ,  Takeo Kanamori ,  Koichiro Mizushima

发明人： Tsuyoki Nishikawa ,  Takeo Kanamori ,  Koichiro Mizushima

IPC分类号： H04B15/00

CPC分类号： H04M9/082

摘要： A multichannel echo canceller according to the present invention includes an echo cancellation section which receives loudspeaker input signals sp1, sp2 including a second acoustic signal to be respectively inputted to a plurality of loudspeakers 10, 20 provided in a first location and detection signals m1, m2 detected by a plurality of microphones 11, 21 provided in the first location; separates a first acoustic signal and a second acoustic signal, which are included in the detection signals m1, m2, by performing signal processing based on an independent component analysis; cancels as an echo the second acoustic signal, which is included in the detection signals m1, m2, by outputting only the separated first acoustic signal to a plurality of loudspeakers 30, 40 provided in a second location.

摘要翻译： 根据本发明的多通道回波消除器包括回波消除部分，其接收分别输入到设置在第一位置的多个扬声器10,20的第二声信号的扬声器输入信号sp 1，sp 2，并且检测信号m 1，m 2由设置在第一位置的多个麦克风11,21检测; 通过执行基于独立分量分析的信号处理来分离包含在检测信号m 1，m 2中的第一声信号和第二声信号; 通过仅将分离的第一声信号输出到设置在第二位置的多个扬声器30,40，来将包含在检测信号m 1，m 2中的第二声信号取回。

公开(公告)号：US08861711B2

公开(公告)日：2014-10-14

申请号：US13544514

申请日：2012-07-09

申请人： Shinichi Takayama ,  Tsuyoki Nishikawa

发明人： Shinichi Takayama ,  Tsuyoki Nishikawa

IPC分类号： H04M9/08 ,  H04B15/00 ,  H04B3/23

CPC分类号： H04B3/23

摘要： An echo cancellation apparatus is connectable to a speaker configured to output speaker signals and a microphone configured to receive a sound from the speaker and including a plurality of microphone elements. The echo cancellation apparatus includes: a generating unit configured to generate a plurality of sensitivity signals having different sensitivity patterns which represent directionality of the microphone, based on a plurality of microphone signals obtained from the respective microphone signals; a delay estimating unit configured to determine a shortest delay time as an estimated delay time, the shortest delay time being a shortest one of delay times between the speaker signals and the microphone signals, the delay times being obtained from the respective sensitivity signals; and an echo suppressing unit configured to suppress echoes of the plurality of microphone signals using the estimated delay time.

摘要翻译： 回声消除装置可连接到被配置为输出扬声器信号的扬声器和被配置为从扬声器接收声音并且包括多个麦克风元件的麦克风。 回波消除装置包括：生成单元，被配置为基于从各个麦克风信号获得的多个麦克风信号，生成具有表示麦克风的方向性的不同灵敏度图案的多个灵敏度信号; 延迟估计单元，被配置为将最短延迟时间确定为估计延迟时间，所述最短延迟时间是所述扬声器信号和所述麦克风信号之间的延迟时间中最短的延迟时间，所述延迟时间是从各个灵敏度信号获得的; 以及回波抑制单元，被配置为使用所估计的延迟时间来抑制所述多个麦克风信号的回波。