公开(公告)号：US20150365761A1

公开(公告)日：2015-12-17

申请号：US14304208

申请日：2014-06-13

Applicant: CIRRUS LOGIC, INC.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix ,  Dayong Zhou

IPC: H04R3/00

CPC classification number: G10K11/178 ,  G10K11/17854 ,  G10K11/17855 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/3016 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3045 ,  H04R1/1083 ,  H04R3/005 ,  H04R5/033 ,  H04R2410/05 ,  H04R2499/11

Abstract: In accordance with the present disclosure, an adaptive noise cancellation system may include a controller. The controller may be configured to determine a degree of convergence of an adaptive coefficient control block for controlling an adaptive response of the adaptive noise cancellation system. The controller may enable adaptation of the adaptive coefficient control block if the degree of convergence of the adaptive response is below a particular threshold and disable adaptation of the adaptive coefficient control block if the degree of convergence of the adaptive response is above a particular threshold, such that when the adaptive noise cancellation system is adequately converged, the adaptive noise cancellation system may conserve power by disabling one or more of its components.

Abstract translation: 根据本公开，自适应噪声消除系统可以包括控制器。 控制器可以被配置为确定用于控制自适应噪声消除系统的自适应响应的自适应系数控制块的收敛度。 如果自适应响应的收敛程度低于特定阈值，则控制器可以实现自适应系数控制块的适应，并且如果自适应响应的收敛程度高于特定阈值，则禁止自适应系数控制块的适应，如 当自适应噪声消除系统充分收敛时，自适应噪声消除系统可以通过禁用其一个或多个组件来节省功率。

公开(公告)号：US20150161980A1

公开(公告)日：2015-06-11

申请号：US14101777

申请日：2013-12-10

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix

IPC: G10K11/175

CPC classification number: H04R3/04 ,  G10K11/178 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  H04R2410/05

Abstract: In accordance with systems and methods of the present disclosure, a method may include receiving an error microphone signal indicative of an acoustic output of a transducer and ambient audio sounds at the acoustic output of the transducer. The method may also include generating an anti-noise signal to reduce the presence of the ambient audio sounds at the acoustic output of the transducer based at least on the error microphone signal. The method may further include generating an equalized source audio signal from a source audio signal by adapting, based at least on the error microphone signal, a response of the adaptive playback equalization system to minimize a difference between the source audio signal and the error microphone signal. The method may additionally include combining the anti-noise signal with the equalized source audio signal to generate an audio signal provided to the transducer.

Abstract translation: 根据本公开的系统和方法，一种方法可以包括接收指示换能器的声输出的误差麦克风信号和在换能器的声输出处的环境声音。 该方法还可以包括生成抗噪声信号以至少基于误差麦克风信号来减小在换能器的声输出处的环境音频声音的存在。 该方法还可以包括：通过至少基于误差麦克风信号，适应自适应回放均衡系统的响应来最小化源音频信号和误差麦克风信号之间的差异，从源音频信号产生均衡的源音频信号 。 该方法可以另外包括将抗噪声信号与均衡源音频信号组合以产生提供给换能器的音频信号。

公开(公告)号：US20140307887A1

公开(公告)日：2014-10-16

申请号：US13948566

申请日：2013-07-23

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson

IPC: H04R3/00

CPC classification number: H04R3/002 ,  G10K11/16 ,  G10K11/178 ,  G10K11/17817 ,  G10K11/17833 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3035 ,  G10K2210/3039 ,  G10K2210/3055 ,  G10K2210/3056 ,  G10K2210/503 ,  G10K2210/509

Abstract: In accordance with methods and systems of the present disclosure, a processing circuit may implement a feedback filter having a response that generates a feedback anti-noise signal component from a playback corrected error, the playback corrected error based on a difference between an error microphone signal and a secondary path estimate, and wherein the anti-noise signal comprises at least the feedback anti-noise signal component, a secondary path estimate filter configured to model an electro-acoustic path of the source audio signal and have a response that generates a secondary path estimate from the source audio signal, and a secondary coefficient control block that shapes the response of the secondary path estimate adaptive filter in conformity with a source audio signal and the playback corrected error by adapting the response of the secondary path estimate adaptive filter to minimize the playback corrected error.

Abstract translation: 根据本公开的方法和系统，处理电路可以实现具有响应的反馈滤波器，该响应从回放校正误差产生反馈抗噪声信号分量，基于误差麦克风信号之间的差异的重放校正误差 以及次要路径估计，并且其中所述抗噪声信号至少包括所述反馈噪声信号分量，次路径估计滤波器被配置为对所述源音频信号的电声路径进行建模并具有产生次级路径的响应 来自源音频信号的路径估计，以及二次系数控制块，其通过使辅助路径估计自适应滤波器的响应适应最小化来使源路由估计自适应滤波器的响应与源音频信号和重放校正误差一致， 播放校正错误。

公开(公告)号：US10206032B2

公开(公告)日：2019-02-12

申请号：US13962515

申请日：2013-08-08

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix ,  Antonio J. Miller ,  Robert G. Kratsas ,  Jens-Peter B. Axelsson ,  Dayong Zhou ,  Yang Lu ,  Chin Huang Yong

IPC: H04R3/00 ,  G10K11/178

Abstract: In accordance with the present disclosure, an integrated circuit for implementing at least a portion of a personal audio device may include an output and a processing circuit. The output may provide an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer. The processing circuit may implement an adaptive noise cancellation system that generates the anti-noise signal to reduce the presence of the ambient audio sounds heard by the listener by adapting, based on a presence of the source audio signal, a response of the adaptive noise cancellation system to minimize the ambient audio sounds at the acoustic output of the transducer, wherein the adaptive noise cancellation system is configured to adapt both in the presence and the absence of the source audio signal.

公开(公告)号：US09462376B2

公开(公告)日：2016-10-04

申请号：US13948566

申请日：2013-07-23

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson

IPC: H04R3/00 ,  G10K11/16 ,  G10K11/178

CPC classification number: H04R3/002 ,  G10K11/16 ,  G10K11/178 ,  G10K11/17817 ,  G10K11/17833 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3035 ,  G10K2210/3039 ,  G10K2210/3055 ,  G10K2210/3056 ,  G10K2210/503 ,  G10K2210/509

Abstract: In accordance with methods and systems of the present disclosure, a processing circuit may implement a feedback filter having a response that generates a feedback anti-noise signal component from a playback corrected error, the playback corrected error based on a difference between an error microphone signal and a secondary path estimate, and wherein the anti-noise signal comprises at least the feedback anti-noise signal component, a secondary path estimate filter configured to model an electro-acoustic path of the source audio signal and have a response that generates a secondary path estimate from the source audio signal, and a secondary coefficient control block that shapes the response of the secondary path estimate adaptive filter in conformity with a source audio signal and the playback corrected error by adapting the response of the secondary path estimate adaptive filter to minimize the playback corrected error.

Abstract translation: 根据本公开的方法和系统，处理电路可以实现具有响应的反馈滤波器，该响应从回放校正误差产生反馈抗噪声信号分量，基于误差麦克风信号之间的差异的重放校正误差 以及次要路径估计，并且其中所述抗噪声信号至少包括所述反馈噪声信号分量，次路径估计滤波器被配置为对所述源音频信号的电声路径进行建模并具有产生次级路径的响应 来自源音频信号的路径估计，以及二次系数控制块，其通过使辅助路径估计自适应滤波器的响应适应最小化来使源路由估计自适应滤波器的响应与源音频信号和重放校正误差一致， 播放校正错误。

公开(公告)号：US20140314244A1

公开(公告)日：2014-10-23

申请号：US13943454

申请日：2013-07-16

Applicant: Cirrus Logic, Inc.

Inventor： Chin Huang Yong ,  Jeffrey D. Alderson

IPC: G10K11/16

CPC classification number: G10K11/16 ,  G10K11/178 ,  G10K11/17817 ,  G10K11/17833 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3014 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3027 ,  G10K2210/30351

Abstract: A processing circuit may comprise an adaptive filter having a response generating an anti-noise signal from a reference microphone signal, a secondary path estimate filter modeling an electro-acoustic path of a source audio signal, a biasing portion that generates a scaled anti-noise signal by applying a scaling factor and the response of the secondary path estimate filter to the anti-noise signal, and a coefficient control block that shapes the response of the adaptive filter in conformity with the reference microphone signal and a modified playback corrected error signal by adapting the response of the adaptive filter to minimize ambient audio sounds in the error microphone signal, wherein the playback corrected error is based on a difference between the error microphone signal and the source audio signal and the modified playback corrected error signal is based on a difference between the playback corrected error signal and the scaled anti-noise signal.

Abstract translation: 处理电路可以包括具有从参考麦克风信号产生抗噪声信号的响应的自适应滤波器，对源音频信号的电声路径建模的次路径估计滤波器，产生缩放抗噪声的偏置部分 通过对抗噪声信号应用缩放因子和次路径估计滤波器的响应的信号;以及系数控制块，其根据参考麦克风信号和经修改的重放校正误差信号对自适应滤波器的响应进行整形， 适应自适应滤波器的响应以最小化误差麦克风信号中的环境音频声音，其中重放校正误差基于误差麦克风信号和源音频信号之间的差异，并且经修改的重放校正误差信号基于差 在重放校正误差信号和缩放的抗噪声信号之间。

公开(公告)号：US20140307888A1

公开(公告)日：2014-10-16

申请号：US13962515

申请日：2013-08-08

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix ,  Antonio J. Miller ,  Robert G. Kratsas ,  Jens-Peter B. Axelsson ,  Dayong Zhou ,  Yang Lu ,  Chin Huang Yong

IPC: H04R3/00

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K11/17827 ,  G10K11/17854 ,  G10K11/17885

Abstract: In accordance with the present disclosure, an integrated circuit for implementing at least a portion of a personal audio device may include an output and a processing circuit. The output may provide an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer. The processing circuit may implement an adaptive noise cancellation system that generates the anti-noise signal to reduce the presence of the ambient audio sounds heard by the listener by adapting, based on a presence of the source audio signal, a response of the adaptive noise cancellation system to minimize the ambient audio sounds at the acoustic output of the transducer, wherein the adaptive noise cancellation system is configured to adapt both in the presence and the absence of the source audio signal.

Abstract translation: 根据本公开，用于实现个人音频设备的至少一部分的集成电路可以包括输出和处理电路。 输出可以向传感器提供输出信号，该换能器包括用于回放到收听者的源音频信号和用于抵消在换能器的声输出中环境音频声音的影响的抗噪声信号。 处理电路可以实现自适应噪声消除系统，其产生抗噪声信号，以通过根据源音频信号的存在来适应自适应噪声消除的响应来减少由收听者听到的环境音频声音的存在 系统以最小化在换能器的声输出处的环境音频声音，其中自适应噪声消除系统被配置为在存在和不存在源音频信号的同时适应。