公开(公告)号：US09460701B2

公开(公告)日：2016-10-04

申请号：US13943454

申请日：2013-07-16

Applicant: Cirrus Logic, Inc.

Inventor： Chin Huang Yong ,  Jeffrey D. Alderson

IPC: A61F11/06 ,  G10K11/16 ,  G10K11/178

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：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：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。