公开(公告)号：US20100322436A1

公开(公告)日：2010-12-23

申请号：US12489601

申请日：2009-06-23

Applicant: Yu-Chun Feng ,  Shien-Neng Lai ,  Yu-Hsi Lan ,  Ying-Te Chu

Inventor： Yu-Chun Feng ,  Shien-Neng Lai ,  Yu-Hsi Lan ,  Ying-Te Chu

IPC: H04R3/00 ,  H03G3/00

CPC classification number: H04R3/005

Abstract: An array microphone system includes a first omni-directional microphone, a second omni-directional microphone, a gain control, and a beam former. The first omni-directional microphone faces a first direction. The second omni-directional microphone faces a second direction opposing the first direction. When receiving sound, the first omni-directional microphone and the second omni-directional microphone respectively generate a first signal and a second signal. The gain control amplifies the second signal to transform into a third signal, wherein strength of the third signal is equal to that of the first signal when the sound comes from the first direction. The beam former separates an in-beam sound signal and an out-beam sound signal from the first signal and the third signal.

Abstract translation: 阵列麦克风系统包括第一全向麦克风，第二全向麦克风，增益控制和波束形成器。 第一个全向麦克风面向第一个方向。 第二全向麦克风面向与第一方向相反的第二方向。 当接收到声音时，第一全向麦克风和第二全向麦克风分别产生第一信号和第二信号。 增益控制放大第二信号以变换为第三信号，其中当声音来自第一方向时，第三信号的强度等于第一信号的强度。 波束形成器从第一信号和第三信号分离射束声音信号和出射束声音信号。

公开(公告)号：US20090046866A1

公开(公告)日：2009-02-19

申请号：US12140333

申请日：2008-06-17

Applicant: Yu-Chun Feng ,  Li-Te Wu

Inventor： Yu-Chun Feng ,  Li-Te Wu

IPC: H04B3/20

CPC classification number: H04M9/082

Abstract: An apparatus capable of performing acoustic echo cancellation and a method thereof are provided. The apparatus comprises a mapping matrix, first and second speakers, first and second microphones, a reference generator, and a multi-channel acoustic echo canceller. The mapping matrix generates an output signal according to the first and second far end signals. The first and second speakers, coupled to the mapping matrix, play the output signal. The first and second microphones receive the first and second echo signals that are acoustically coupled from the first and second speakers to the first and second microphones, wherein the first and second echo signals are correlated to the output signal. The reference generator generates a reference signal linearly correlated to the output signal according to the first and second far end signals. The multi-channel acoustic echo canceller, coupled to the reference generator and the first and second microphones, filters the reference signal to generate the first and second filtered signals to be indicative of the estimated echo signals at the first and second microphones, subtracts the first filtered signal from the first echo signal to generate a first error signal, and subtracts the second filtered signal from the second echo signal to generate a second error signal, and then transmits the first and second error signals to a far end terminal.

Abstract translation: 提供一种能够执行声学回声消除的装置及其方法。 该装置包括映射矩阵，第一和第二扬声器，第一和第二麦克风，参考发生器和多声道声学回声消除器。 映射矩阵根据第一和第二远端信号产生输出信号。 耦合到映射矩阵的第一和第二扬声器播放输出信号。 第一和第二麦克风接收从第一和第二扬声器声耦合到第一和第二麦克风的第一和第二回波信号，其中第一和第二回波信号与输出信号相关。 参考发生器根据第一和第二远端信号产生与输出信号线性相关的参考信号。 耦合到参考发生器和第一和第二麦克风的多通道声学回声消除器对参考信号进行滤波以产生第一和第二滤波信号以指示在第一和第二麦克风处的估计的回波信号，减去第一和第二麦克风 从第一回波信号滤波的信号产生第一误差信号，并从第二回波信号中减去第二滤波信号以产生第二误差信号，然后将第一和第二误差信号发送到远端终端。

公开(公告)号：US08208656B2

公开(公告)日：2012-06-26

申请号：US12489601

申请日：2009-06-23

Applicant: Yu-Chun Feng ,  Shien-Neng Lai ,  Yu-Hsi Lan ,  Ying-Te Chu

Inventor： Yu-Chun Feng ,  Shien-Neng Lai ,  Yu-Hsi Lan ,  Ying-Te Chu

IPC: H04R3/00 ,  H03G3/00 ,  H03G7/00

CPC classification number: H04R3/005

Abstract: An array microphone system includes a first omni-directional microphone, a second omni-directional microphone, a gain control, and a beam former. The first omni-directional microphone faces a first direction. The second omni-directional microphone faces a second direction opposing the first direction. When receiving sound, the first omni-directional microphone and the second omni-directional microphone respectively generate a first signal and a second signal. The gain control amplifies the second signal to transform into a third signal, wherein strength of the third signal is equal to that of the first signal when the sound comes from the first direction. The beam former separates an in-beam sound signal and an out-beam sound signal from the first signal and the third signal.

Abstract translation: 阵列麦克风系统包括第一全向麦克风，第二全向麦克风，增益控制和波束形成器。 第一个全向麦克风面向第一个方向。 第二全向麦克风面向与第一方向相反的第二方向。 当接收到声音时，第一全向麦克风和第二全向麦克风分别产生第一信号和第二信号。 增益控制放大第二信号以变换为第三信号，其中当声音来自第一方向时，第三信号的强度等于第一信号的强度。 波束形成器从第一信号和第三信号分离射束声音信号和出射束声音信号。