公开(公告)号：EP2847757B1

公开(公告)日：2016-12-14

申请号：EP13720640.5

申请日：2013-04-15

申请人： Cirrus Logic, Inc.

发明人： ALDERSON, Jeffrey ,  HENDRIX, Jon, D. ,  ZHOU, Dayong ,  MILLER, Antonio, John ,  YONG, Chin ,  KAMATH, Gautham, Devendra

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K11/16 ,  G10K2210/00 ,  G10K2210/108 ,  G10K2210/3014 ,  G10K2210/3017 ,  G10K2210/3028 ,  G10K2210/30391 ,  G10L2021/02165 ,  H04B3/237

摘要： A personal audio device includes a personal audio device housing; a transducer mounted on the housing for reproducing an audio signal including an anti-noise signal (anti-noise) for countering effects of ambient audio sounds in an acoustic output of the output transducer; a reference microphone mounted on the housing for providing a reference microphone signal (ref) indicative of the ambient audio sounds; and a processing circuit (30) within the housing. The processing circuit (30) adaptively generates the anti-noise signal (anti-noise) from the reference microphone signal (ref) such that the anti-noise signal (anti-noise) causes substantial cancellation of the ambient audio sounds. The processing circuit (30), in response to determining that an amplitude of acoustic leakage of the source audio into the reference microphone is substantial with respect to an amplitude of the ambient audio sounds, takes action to prevent improper generation of the anti-noise signal (anti-noise).

公开(公告)号：EP2847758B1

公开(公告)日：2016-06-22

申请号：EP13720701.5

申请日：2013-04-24

申请人： Cirrus Logic, Inc.

发明人： ZHOU, Dayong ,  LU, Yang ,  HENDRIX, Jon, D. ,  ALDERSON, Jeffrey ,  MILLER, Antonio, John ,  YONG, Chin ,  KAMATH, Gautham, Devendra

IPC分类号： G10K11/178

CPC分类号： G10K11/175 ,  G10K11/16 ,  G10K11/178 ,  G10K2210/00 ,  G10K2210/108 ,  G10K2210/3011 ,  G10K2210/30231 ,  G10K2210/3028 ,  G10K2210/30351 ,  G10K2210/503

摘要： An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal from a reference microphone signal that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone proximate the speaker provides an error signal. A secondary path estimating adaptive filter estimates the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Tones in the source audio, such as remote ringtones, present in downlink audio during initiation of a telephone call, are detected by a tone detector using accumulated tone persistence and non-silence hangover counting, and adaptation of the secondary path estimating adaptive filter is halted to prevent adapting to the tones. Adaptation of the adaptive filters is then sequenced so any disruption of the secondary path adaptive filter response is removed before allowing the anti-noise generating filter to adapt.

公开(公告)号：EP2847758A1

公开(公告)日：2015-03-18

申请号：EP13720701.5

申请日：2013-04-24

申请人： Cirrus Logic, Inc.

发明人： ZHOU, Dayong ,  LU, Yang ,  HENDRIX, Jon, D. ,  ALDERSON, Jeffrey ,  MILLER, Antonio, John ,  YONG, Chin ,  KAMATH, Gautham, Devendra

IPC分类号： G10K11/178

CPC分类号： G10K11/175 ,  G10K11/16 ,  G10K11/178 ,  G10K2210/00 ,  G10K2210/108 ,  G10K2210/3011 ,  G10K2210/30231 ,  G10K2210/3028 ,  G10K2210/30351 ,  G10K2210/503

摘要： An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal from a reference microphone signal that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone proximate the speaker provides an error signal. A secondary path estimating adaptive filter estimates the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Tones in the source audio, such as remote ringtones, present in downlink audio during initiation of a telephone call, are detected by a tone detector using accumulated tone persistence and non-silence hangover counting, and adaptation of the secondary path estimating adaptive filter is halted to prevent adapting to the tones. Adaptation of the adaptive filters is then sequenced so any disruption of the secondary path adaptive filter response is removed before allowing the anti-noise generating filter to adapt.

摘要翻译： 自适应噪声消除（ANC）电路自适应地从注入扬声器或其它换能器输出的参考麦克风信号产生抗噪声信号，以引起环境声音的消除。 靠近扬声器的错误麦克风提供错误信号。 二次路径估计自适应滤波器估计从噪声消除电路通过换能器的电声路径，从而可以从误差信号中去除源音频。 在开始电话呼叫期间存在于下行链路音频中的源音频中的音调（例如远程铃声）由使用累积的音调持续性和非静音宿醉计数的音调检测器检测，并且停止辅助路径估计自适应滤波器的适配 以防止适应色调。 然后对自适应滤波器的适应进行排序，因此在允许抗噪声产生滤波器适应之前，去除二次路径自适应滤波器响应的任何中断。

公开(公告)号：EP2847757A1

公开(公告)日：2015-03-18

申请号：EP13720640.5

申请日：2013-04-15

申请人： Cirrus Logic, Inc.

发明人： ALDERSON, Jeffrey ,  HENDRIX, Jon, D. ,  ZHOU, Dayong ,  MILLER, Antonio, John ,  YONG, Chin ,  KAMATH, Gautham, Devendra

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K11/16 ,  G10K2210/00 ,  G10K2210/108 ,  G10K2210/3014 ,  G10K2210/3017 ,  G10K2210/3028 ,  G10K2210/30391 ,  G10L2021/02165 ,  H04B3/237

摘要： A personal audio device includes a personal audio device housing; a transducer mounted on the housing for reproducing an audio signal including an anti-noise signal (anti-noise) for countering effects of ambient audio sounds in an acoustic output of the output transducer; a reference microphone mounted on the housing for providing a reference microphone signal (ref) indicative of the ambient audio sounds; and a processing circuit (30) within the housing. The processing circuit (30) adaptively generates the anti-noise signal (anti-noise) from the reference microphone signal (ref) such that the anti-noise signal (anti-noise) causes substantial cancellation of the ambient audio sounds. The processing circuit (30), in response to determining that an amplitude of acoustic leakage of the source audio into the reference microphone is substantial with respect to an amplitude of the ambient audio sounds, takes action to prevent improper generation of the anti-noise signal (anti-noise).