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    Systems and methods for selectively enabling and disabling adaptation of an adaptive noise cancellation system
    11.
    发明授权
    Systems and methods for selectively enabling and disabling adaptation of an adaptive noise cancellation system 有权

    公开(公告)号：US10181315B2

    公开(公告)日：2019-01-15

    申请号：US14304208

    申请日：2014-06-13

    Applicant: Cirrus Logic, Inc.

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

    IPC: G10K11/178 ,  H04R1/10 ,  H04R3/00 ,  H04R5/033

    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.

    Frequency-dependent sidetone calibration
    15.
    发明授权
    Frequency-dependent sidetone calibration 有权
    频率依赖的侧音校准

    公开(公告)号：US09369557B2

    公开(公告)日：2016-06-14

    申请号：US14197814

    申请日：2014-03-05

    Applicant: Cirrus Logic, Inc.

    Inventor： Roy Scott Kaller ,  Jon D. Hendrix

    IPC: H04M1/00 ,  H04M1/58 ,  H04M9/08 ,  G10L21/0364 ,  G10L21/0208

    CPC classification number: H04M1/58 ,  G10L21/0364 ,  G10L2021/02082 ,  H04M1/585 ,  H04M9/08

    Abstract: A personal audio device includes a sidetone circuit with one or more adjustable coefficients that generates a sidetone signal from the output of a first microphone. The sidetone circuit has one or more adjustable coefficients for altering the relationship between the first microphone signal and the sidetone signal. The personal audio device also includes a transducer for reproducing playback audio and the sidetone signal at an ear of a listener and a second microphone for measuring the output of the transducer as delivered to the ear of the listener. The sidetone circuit includes a calibration circuit for estimating a response of the second microphone to the sidetone signal and adjusting the coefficient of the sidetone circuit according to the estimated response.

    Abstract translation: 个人音频设备包括具有一个或多个可调节系数的侧音电路，其从第一麦克风的输出产生侧音信号。 侧音电路具有用于改变第一麦克风信号和侧音信号之间的关系的一个或多个可调系数。 个人音频设备还包括用于再现回放音频的换能器和在收听者的耳朵处的侧音信号，以及用于测量传递到收听者的耳朵的换能器的输出的第二麦克风。 侧音电路包括校准电路，用于估计第二麦克风对侧音信号的响应，并且根据估计的响应调整侧音电路的系数。

    SYSTEMS AND METHODS FOR SELECTIVELY ENABLING AND DISABLING ADAPTATION OF AN ADAPTIVE NOISE CANCELLATION SYSTEM
    16.
    发明申请
    SYSTEMS AND METHODS FOR SELECTIVELY ENABLING AND DISABLING ADAPTATION OF AN ADAPTIVE NOISE CANCELLATION SYSTEM 审中-公开
    选择适应噪声消除系统的选择和禁用系统和方法

    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。

    Leakage-modeling adaptive noise canceling for earspeakers
    17.
    发明授权
    Leakage-modeling adaptive noise canceling for earspeakers 有权
    用于耳机的泄漏建模自适应噪声消除

    公开(公告)号：US09142205B2

    公开(公告)日：2015-09-22

    申请号：US13692367

    申请日：2012-12-03

    Applicant: Cirrus Logic, Inc.

    Inventor： Jeffrey Alderson ,  Jon D. Hendrix

    IPC: G10K11/00 ,  G10K11/178

    CPC classification number: G10K11/002 ,  G10K11/17819 ,  G10K11/17833 ,  G10K2210/1081 ,  G10K2210/505 ,  G10K2210/506

    Abstract: A personal audio device, such as a headphone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio, and the anti-noise signal is combined with source audio to provide an output for a speaker. The anti-noise signal causes cancellation of ambient audio sounds that appear at the reference microphone. A processing circuit uses the reference microphone to generate the anti-noise signal, which can be generated by an adaptive filter. The processing circuit also models an acoustic leakage path from the transducer to the reference microphone and removes elements of the source audio appearing at the reference microphone signal due to the acoustic output of the speaker. Another adaptive filter can be used to model the acoustic leakage path.

    Abstract translation: 诸如耳机的个人音频设备包括自适应噪声消除（ANC）电路，其自适应地从测量环境音频的参考麦克风信号产生抗噪声信号，并将抗噪声信号与源音频组合 为扬声器提供输出。 抗噪声信号会导致出现在参考麦克风处的环境音频声音的消除。 处理电路使用参考麦克风来产生可由自适应滤波器产生的抗噪声信号。 处理电路还对从换能器到参考麦克风的声音泄漏路径建模，并且由于扬声器的声输出而去除出现在参考麦克风信号处的源音频的元素。 另一种自适应滤波器可用于对声学泄漏路径建模。

    Error-signal content controlled adaptation of secondary and leakage path models in noise-canceling personal audio devices
    18.
    发明授权
    Error-signal content controlled adaptation of secondary and leakage path models in noise-canceling personal audio devices 有权
    噪声消除个人音频设备中的次要和泄漏路径模型的错误信号内容控制适应

    公开(公告)号：US09076427B2

    公开(公告)日：2015-07-07

    申请号：US13787906

    申请日：2013-03-07

    Applicant: Cirrus Logic, Inc.

    Inventor： Jeffrey Alderson ,  Jon D. Hendrix ,  Yang Lu

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

    CPC classification number: G10K11/16 ,  G10K11/17819 ,  G10K11/17833 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/3023 ,  G10K2210/3055 ,  G10K2210/503 ,  G10K2210/505 ,  G10K2210/506

    Abstract: A personal audio device, such as a wireless telephone, generates an anti-noise signal from a microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The microphone measures the ambient environment, but also contains a component due to the transducer acoustic output. An adaptive filter is used to estimate the electro-acoustical path from the noise-canceling circuit through the transducer to the at least one microphone so that source audio can be removed from the microphone signal. A determination of the relative amount of the ambient sounds present in the microphone signal versus the amount of the transducer output of the source audio present in the microphone signal is made to determine whether to update the adaptive response.

    Abstract translation: 诸如无线电话的个人音频设备从麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其他换能器输出中以引起环境声音的消除。 麦克风测量周围环境，但由于传感器的声音输出，也包含一个组件。 自适应滤波器用于估计从噪声消除电路通过换能器到至少一个麦克风的电声路径，从而可以从麦克风信号中去除源音频。 确定麦克风信号中存在的环境声音的相对量与麦克风信号中存在的源音频的换能器输出的量的确定以确定是否更新自适应响应。

    COORDINATED GAIN CONTROL IN ADAPTIVE NOISE CANCELLATION (ANC) FOR EARSPEAKERS
    19.
    发明申请
    COORDINATED GAIN CONTROL IN ADAPTIVE NOISE CANCELLATION (ANC) FOR EARSPEAKERS 审中-公开
    自适应噪声消除（ANC）中的协调增益控制

    公开(公告)号：US20150189434A1

    公开(公告)日：2015-07-02

    申请号：US14656124

    申请日：2015-03-12

    Applicant: Cirrus Logic, Inc.

    Inventor： Jon D. Hendrix ,  Jeffrey Alderson

    IPC: H04R3/00

    CPC classification number: H04R3/002 ,  G10K11/175 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/30391 ,  G10K2210/3055 ,  G10K2210/503

    Abstract: A personal audio device including earspeakers, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each earspeaker from at least one microphone signal that measures the ambient audio, and the anti-noise signals are combined with source audio to provide outputs for the earspeakers. The anti-noise signals cause cancellation of ambient audio sounds at the respective earspeakers. A processing circuit uses the microphone signal(s) to generate the anti-noise signals, which can be generated by adaptive filters. The processing circuit controls adaptation of the adaptive filters such that when the processing circuit detects that either of the earspeakers are off-ear, a gain applied to the anti-noise signals is reduced.

    Abstract translation: 一种包括耳朵扬声器的个人音频设备包括自适应噪声消除（ANC）电路，其自适应地从测量环境音频的至少一个麦克风信号为每个耳塞产生抗噪声信号，并且抗噪声信号与源音频 为耳机提供输出。 抗噪声信号会引起相应耳机扬声器环境声音的消除。 处理电路使用麦克风信号来产生可由自适应滤波器产生的抗噪声信号。 处理电路控制自适应滤波器的自适应，使得当处理电路检测到任一个耳机是脱耳机时，降低了对抗噪声信号的增益。

    SYSTEMS AND METHODS FOR PROVIDING ADAPTIVE PLAYBACK EQUALIZATION IN AN AUDIO DEVICE
    20.
    发明申请
    SYSTEMS AND METHODS FOR PROVIDING ADAPTIVE PLAYBACK EQUALIZATION IN AN AUDIO DEVICE 审中-公开
    在音频设备中提供自适应播放均衡的系统和方法

    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。

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