公开(公告)号：US08917885B2

公开(公告)日：2014-12-23

申请号：US13120885

申请日：2009-09-24

申请人： Shinya Sakurada ,  Takuro Sone ,  Takaya Kakizaki ,  Sachiya Sasaki ,  Kosuke Saito

发明人： Shinya Sakurada ,  Takuro Sone ,  Takaya Kakizaki ,  Sachiya Sasaki ,  Kosuke Saito

IPC分类号： H04B15/00 ,  H04R1/10 ,  H04R27/00 ,  H04R3/00 ,  H03G9/00 ,  H03G5/00 ,  H03G3/00 ,  H04R3/02

CPC分类号： H04R3/02

摘要： A pseudo noise superimposing unit superimposes a pseudo noise (M-sequence) to an audio signal picked up by a microphone and outputs the superimposed signal to an amplifying system. An calculating unit calculates a correlation value between the audio signal picked up by the microphone and the pseudo noise. The calculating unit estimates a gain of a closed loop based on the correlation value. A gain control unit suppresses a gain of the audio signal based on the estimated gain of the closed loop.

摘要翻译： 伪噪声叠加单元将伪噪声（M序列）叠加到由麦克风拾取的音频信号，并将叠加的信号输出到放大系统。 计算单元计算由麦克风拾取的音频信号与伪噪声之间的相关值。 计算单元基于相关值来估计闭环的增益。 增益控制单元基于闭环的估计增益抑制音频信号的增益。

公开(公告)号：US20110182439A1

公开(公告)日：2011-07-28

申请号：US13120885

申请日：2009-09-24

申请人： Shinya Sakurada ,  Takuro Sone ,  Takaya Kakizaki ,  Sachiya Sasaki ,  Kosuke Saito

发明人： Shinya Sakurada ,  Takuro Sone ,  Takaya Kakizaki ,  Sachiya Sasaki ,  Kosuke Saito

IPC分类号： H04B15/00

CPC分类号： H04R3/02

摘要： A pseudo noise superimposing unit superimposes a pseudo noise (M-sequence) to an audio signal picked up by a microphone and outputs the superimposed signal to an amplifying system. An calculating unit calculates a correlation value between the audio signal picked up by the microphone and the pseudo noise. The calculating unit estimates a gain of a closed loop based on the correlation value. A gain control unit suppresses a gain of the audio signal based on the estimated gain of the closed loop.

摘要翻译： 伪噪声叠加单元将伪噪声（M序列）叠加到由麦克风拾取的音频信号，并将叠加的信号输出到放大系统。 计算单元计算由麦克风拾取的音频信号与伪噪声之间的相关值。 计算单元基于相关值来估计闭环的增益。 增益控制单元基于闭环的估计增益抑制音频信号的增益。