公开(公告)号：US09357300B2

公开(公告)日：2016-05-31

申请号：US14864639

申请日：2015-09-24

Applicant: Cirrus Logic, Inc.

Inventor： Jie Su

IPC: H04R3/00

CPC classification number: H04R3/007

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a controller configured to be coupled to an audio speaker, wherein the controller receives one or more signals indicative of one or more operating characteristics of the audio speaker and compares the one or more operating characteristics to one or more speaker protection thresholds, and based on the comparison, processes an audio input signal to generate an audio output signal communicated from the controller to the audio speaker, further wherein the one or more speaker protection thresholds are based on offline reliability testing of one or more audio speakers similar to the audio speaker and the controller generates one or more modeled parameters for the audio speaker and modifies the one or more speaker protection thresholds based on the one or more modeled parameters.

公开(公告)号：US20160050489A1

公开(公告)日：2016-02-18

申请号：US14457284

申请日：2014-08-12

Applicant: Cirrus Logic, Inc.

Inventor： Khosrow Lashkari ,  Jie Su

IPC: H04R3/00

CPC classification number: H04R3/00 ,  H04M9/08 ,  H04R3/002 ,  H04R3/02

Abstract: In accordance with embodiments of the present disclosure, an audio processing circuit for use in an audio device may perform non-linear acoustic echo cancellation by predicting a displacement associated with an audio speaker, wherein such prediction takes into account a nonlinear response of the audio speaker with a mathematical model that calculates the predicted displacement of the audio speaker as a function of a current signal associated with the audio speaker using a time-varying difference equation, wherein coefficients of the difference equation are based on a set of physical parameters of the audio speaker. From the predicted displacement, the processing circuit may calculate a predicted acoustic output of the audio speaker, which may be used to generate a reference signal to an acoustic echo canceller.

Abstract translation: 根据本公开的实施例，用于音频设备的音频处理电路可以通过预测与音频扬声器相关联的位移来执行非线性声学回声消除，其中这种预测考虑了音频扬声器的非线性响应 使用数学模型，其使用时变差分方程式计算作为与音频扬声器相关联的当前信号的音频扬声器的预测位移，其中差分方程的系数基于音频的一组物理参数 扬声器。 从预测的位移，处理电路可以计算音频扬声器的预测声输出，其可以用于产生到声学回波消除器的参考信号。

公开(公告)号：US20140270208A1

公开(公告)日：2014-09-18

申请号：US13844602

申请日：2013-03-15

Applicant: CIRRUS LOGIC, INC.

Inventor： Antonio John Miller ,  Jie Su

IPC: H04R29/00

CPC classification number: H04R3/005 ,  H04R2410/05 ,  H04R2499/11

Abstract: Coupling between a user's ear and a speaker of a mobile device may be determined by measuring an impedance of the speaker. When the user presses the mobile device against the user's ear, the speaker impedance changes as a result of loading in the speaker's acoustic radiation impedance. The speaker impedance change may be correlated with the force applied by the user to the mobile device. The measured speaker impedance may be provided as feedback to an adaptive noise cancellation (ANC) algorithm to adjust the output at the speaker. For example, when the mobile device is removed from the user's ear, the ANC algorithm may be muted.

Abstract translation: 可以通过测量扬声器的阻抗来确定用户的耳朵和移动设备的扬声器之间的耦合。 当用户将用户的耳朵按压移动设备时，由于扬声器的声辐射阻抗的加载，扬声器的阻抗会改变。 扬声器阻抗变化可能与用户对移动设备施加的力相关。 所测量的扬声器阻抗可以被提供为自适应噪声消除（ANC）算法的反馈，以调整扬声器处的输出。 例如，当从用户的耳朵移除移动设备时，ANC算法可以被静音。

公开(公告)号：US09398374B2

公开(公告)日：2016-07-19

申请号：US14457284

申请日：2014-08-12

Applicant: Cirrus Logic, Inc.

Inventor： Khosrow Lashkari ,  Jie Su

IPC: H04B3/00 ,  H04R3/00 ,  H04R3/02

CPC classification number: H04R3/00 ,  H04M9/08 ,  H04R3/002 ,  H04R3/02

Abstract: In accordance with embodiments of the present disclosure, an audio processing circuit for use in an audio device may perform non-linear acoustic echo cancellation by predicting a displacement associated with an audio speaker, wherein such prediction takes into account a nonlinear response of the audio speaker with a mathematical model that calculates the predicted displacement of the audio speaker as a function of a current signal associated with the audio speaker using a time-varying difference equation, wherein coefficients of the difference equation are based on a set of physical parameters of the audio speaker. From the predicted displacement, the processing circuit may calculate a predicted acoustic output of the audio speaker, which may be used to generate a reference signal to an acoustic echo canceller.

Abstract translation: 根据本公开的实施例，用于音频设备的音频处理电路可以通过预测与音频扬声器相关联的位移来执行非线性声学回声消除，其中这种预测考虑了音频扬声器的非线性响应 使用数学模型，其使用时变差分方程式计算作为与音频扬声器相关联的当前信号的音频扬声器的预测位移，其中差分方程的系数基于音频的一组物理参数 扬声器。 从预测的位移，处理电路可以计算音频扬声器的预测声输出，其可以用于产生到声学回波消除器的参考信号。

公开(公告)号：US09106989B2

公开(公告)日：2015-08-11

申请号：US14029159

申请日：2013-09-17

Applicant: Cirrus Logic, Inc.

Inventor： Ning Li ,  Antonio John Miller ,  Jon D. Hendrix ,  Jie Su ,  Jeffrey Alderson ,  Ali Abdollahzadeh Milani

IPC: H03B29/00 ,  H04R3/00 ,  G10K11/178

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3016 ,  G10K2210/3026 ,  G10K2210/3028 ,  H04R1/1083 ,  H04R2460/01

Abstract: Techniques for estimating adaptive noise canceling (ANC) performance in a personal audio device, such as a wireless telephone, provide robustness of operation by triggering corrective action when ANC performance is low, and/or by saving a state of the ANC system when ANC performance is high. An anti-noise signal is generated from a reference microphone signal and is provided to an output transducer along with program audio. A measure of ANC gain is determined by computing a ratio of a first indication of magnitude of an error microphone signal that provides a measure of the ambient sounds and program audio heard by the listener including the effects of the anti-noise, to a second indication of magnitude of the error microphone signal without the effects of the anti-noise. The ratio can be determined for different frequency bands in order to determine whether particular adaptive filters are trained properly.

Abstract translation: 用于估计诸如无线电话的个人音频设备中的自适应噪声消除（ANC）性能的技术通过在ANC性能低时通过触发纠正动作来提供鲁棒性，和/或通过在ANC性能时保存ANC系统的状态 高。 从参考麦克风信号产生抗噪声信号，并将其与节目音频一起提供给输出变换器。 ANC增益的量度通过计算提供环境声音的度量的误差麦克风信号的幅度的第一指示和包括抗噪声的影响的收听者听到的节目音频的第一指示与第二指示 的误差麦克风信号的幅度没有抗噪声的影响。 可以针对不同的频带来确定该比率，以便确定特定的自适应滤波器是否被适当地训练。

公开(公告)号：US09635480B2

公开(公告)日：2017-04-25

申请号：US15195785

申请日：2016-06-28

Applicant: Cirrus Logic, Inc.

Inventor： Antonio John Miller ,  Jie Su

IPC: H04R29/00 ,  G06F3/16 ,  H04R3/00

CPC classification number: H04R29/001 ,  G06F3/165 ,  H04R3/00 ,  H04R3/005 ,  H04R2410/05 ,  H04R2460/01 ,  H04R2499/11

Abstract: A speaker impedance may be determined by monitoring a voltage and/or current of the speaker. The calculated impedance may be used to determine whether the mobile device containing the speaker is on- or off-ear. The impedance determination may be assisted by applying a test tone low level signal to the speaker. The test tone may be inaudible to the user, but used to determine an impedance of the speaker at the frequency of the test tone. The impedance at that test tone may be used to determine whether a resonance frequency of the speaker is at a frequency corresponding to an on- or off-ear condition. The measured speaker impedance may be provided as feedback to an adaptive noise cancellation (ANC) algorithm to adjust the output at the speaker. For example, when the mobile device is removed from the user's ear, the ANC algorithm may be disabled.

公开(公告)号：US09173027B2

公开(公告)日：2015-10-27

申请号：US13791461

申请日：2013-03-08

Applicant: Cirrus Logic, Inc.

Inventor： Jie Su

IPC: H04R3/00

CPC classification number: H04R3/007

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a controller configured to be coupled to an audio speaker, wherein the controller receives one or more signals indicative of one or more operating characteristics of the audio speaker and compares the one or more operating characteristics to one or more speaker protection thresholds, and based on the comparison, processes an audio input signal to generate an audio output signal communicated from the controller to the audio speaker, further wherein the one or more speaker protection thresholds are based on offline reliability testing of one or more audio speakers similar to the audio speaker and the controller generates one or more modeled parameters for the audio speaker and modifies the one or more speaker protection thresholds based on the one or more modeled parameters.

Abstract translation: 根据本公开的实施例，系统和方法可以包括被配置为耦合到音频扬声器的控制器，其中控制器接收指示音频扬声器的一个或多个操作特性的一个或多个信号，并将该一个或多个 对一个或多个扬声器保护阈值的操作特性，并且基于比较，处理音频输入信号以产生从控制器传送到音频扬声器的音频输出信号，其中，一个或多个扬声器保护阈值基于离线可靠性 类似于音频扬声器的一个或多个音频扬声器的测试和控制器产生用于音频扬声器的一个或多个建模参数，并且基于一个或多个建模的参数修改一个或多个扬声器保护阈值。

公开(公告)号：US20140254804A1

公开(公告)日：2014-09-11

申请号：US13791461

申请日：2013-03-08

Applicant: CIRRUS LOGIC, INC.

Inventor： Jie Su

IPC: H03G1/00

CPC classification number: H04R3/007

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a controller configured to be coupled to an audio speaker, wherein the controller receives one or more signals indicative of one or more operating characteristics of the audio speaker and compares the one or more operating characteristics to one or more speaker protection thresholds, and based on the comparison, processes an audio input signal to generate an audio output signal communicated from the controller to the audio speaker, further wherein the one or more speaker protection thresholds are based on offline reliability testing of one or more audio speakers similar to the audio speaker and the controller generates one or more modeled parameters for the audio speaker and modifies the one or more speaker protection thresholds based on the one or more modeled parameters.

Abstract translation: 根据本公开的实施例，系统和方法可以包括被配置为耦合到音频扬声器的控制器，其中控制器接收指示音频扬声器的一个或多个操作特性的一个或多个信号，并将该一个或多个 对一个或多个扬声器保护阈值的操作特性，并且基于比较，处理音频输入信号以产生从控制器传送到音频扬声器的音频输出信号，其中，一个或多个扬声器保护阈值基于离线可靠性 类似于音频扬声器的一个或多个音频扬声器的测试和控制器产生用于音频扬声器的一个或多个建模参数，并且基于一个或多个建模的参数修改一个或多个扬声器保护阈值。