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    Variable rate adaptive active noise cancellation
    3.
    发明授权
    Variable rate adaptive active noise cancellation 有权
    可变速率自适应有源噪声消除

    公开(公告)号：US09466282B2

    公开(公告)日：2016-10-11

    申请号：US14714839

    申请日：2015-05-18

    Applicant: QUALCOMM Incorporated

    Inventor： Hyun Jin Park ,  Deepak Kumar Challa ,  Catalin Lacatus

    IPC: G10K11/16 ,  G10K11/175 ,  G10K11/178

    CPC classification number: G10K11/175 ,  G10K11/178 ,  G10K11/17835 ,  G10K11/17855 ,  G10K2210/1081 ,  G10K2210/30391 ,  G10K2210/3051 ,  G10K2210/3053

    Abstract: A method of audio signal processing includes determining a difference between a first set of filter parameters of a first input frame of an active noise cancellation (ANC) filter and a second set of filter parameters of a second input frame of the ANC filter. The method further includes selectively modifying a duty cycle of adaptive ANC processing associated with the ANC filter based on the difference between the first set of filter parameters and the second set of filter parameters.

    Abstract translation: 音频信号处理的方法包括确定有源噪声消除（ANC）滤波器的第一输入帧的第一组滤波器参数与ANC滤波器的第二输入帧的第二组滤波器参数之间的差。 该方法还包括基于第一组滤波器参数和第二组滤波器参数之间的差异选择性地修改与ANC滤波器相关联的自适应ANC处理的占空比。

    SYSTEMS AND METHODS FOR FEEDBACK DETECTION
    4.
    发明申请
    SYSTEMS AND METHODS FOR FEEDBACK DETECTION 有权
    用于反馈检测的系统和方法

    公开(公告)号：US20150172815A1

    公开(公告)日：2015-06-18

    申请号：US14192634

    申请日：2014-02-27

    Applicant: QUALCOMM Incorporated

    Inventor： Hyun Jin Park ,  Deepak Kumar Challa

    IPC: H04R3/02

    CPC classification number: H04R3/02 ,  G10K11/17819 ,  G10K11/17833 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3056 ,  H04R25/453 ,  H04R2460/01

    Abstract: A method for feedback detection by an electronic device is described. The method includes receiving a first microphone signal by a first microphone. A feedback loop includes the first microphone and a speaker. The method also includes receiving a second microphone signal by a second microphone that is outside of the feedback loop. A first signal based on the first microphone signal and a second signal based on the second microphone signal exhibit a higher correlation in presence of feedback and exhibit a lower correlation in absence of feedback. The method further includes determining a correlation based on the first microphone signal and the second microphone signal. The method additionally includes determining whether feedback is occurring based on the correlation.

    Abstract translation: 描述了一种由电子设备进行反馈检测的方法。 该方法包括由第一麦克风接收第一麦克风信号。 反馈回路包括第一麦克风和扬声器。 该方法还包括通过在反馈回路外部的第二麦克风接收第二麦克风信号。 基于第一麦克风信号的第一信号和基于第二麦克风信号的第二信号在存在反馈时表现出较高的相关性，并且在没有反馈的情况下表现出较低的相关性。 该方法还包括基于第一麦克风信号和第二麦克风信号来确定相关性。 该方法还包括基于相关性确定反馈是否正在发生。

    VARIABLE RATE ADAPTIVE ACTIVE NOISE CANCELLATION
    5.
    发明申请
    VARIABLE RATE ADAPTIVE ACTIVE NOISE CANCELLATION 有权
    可变速率自适应主动噪声消除

    公开(公告)号：US20160125866A1

    公开(公告)日：2016-05-05

    申请号：US14714839

    申请日：2015-05-18

    Applicant: QUALCOMM Incorporated

    Inventor： Hyun Jin Park ,  Deepak Kumar Challa ,  Catalin Lacatus

    IPC: G10K11/175

    CPC classification number: G10K11/175 ,  G10K11/178 ,  G10K11/17835 ,  G10K11/17855 ,  G10K2210/1081 ,  G10K2210/30391 ,  G10K2210/3051 ,  G10K2210/3053

    Abstract: A method of audio signal processing includes determining a difference between a first set of filter parameters of a first input frame of an active noise cancellation (ANC) filter and a second set of filter parameters of a second input frame of the ANC filter. The method further includes selectively modifying a duty cycle of adaptive ANC processing associated with the ANC filter based on the difference between the first set of filter parameters and the second set of filter parameters.

    Abstract translation: 音频信号处理的方法包括确定有源噪声消除（ANC）滤波器的第一输入帧的第一组滤波器参数与ANC滤波器的第二输入帧的第二组滤波器参数之间的差。 该方法还包括基于第一组滤波器参数和第二组滤波器参数之间的差异选择性地修改与ANC滤波器相关联的自适应ANC处理的占空比。

    LIMITING ACTIVE NOISE CANCELLATION OUTPUT
    6.
    发明申请
    LIMITING ACTIVE NOISE CANCELLATION OUTPUT 有权
    限制主动噪声消除输出

    公开(公告)号：US20150104031A1

    公开(公告)日：2015-04-16

    申请号：US14477685

    申请日：2014-09-04

    Applicant: QUALCOMM Incorporated

    Inventor： Hyun Jin Park ,  Deepak Kumar Challa ,  Song Wang ,  Dinesh Ramakrishnan

    IPC: H04R3/00

    CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/3039 ,  G10K2210/3056 ,  H04R2410/05

    Abstract: In general, techniques are described for limiting active noise cancellation output. As one example, an apparatus comprising one or more processors may perform the techniques. The one or more processors may be configured to, when an estimated noise level increases, dynamically lowering application of active noise cancellation to at least a portion of an audio signal to obtain at least a portion of an active noise cancelled version of the audio signal.

    Abstract translation: 通常，描述了用于限制有源噪声消除输出的技术。 作为一个示例，包括一个或多个处理器的装置可以执行这些技术。 一个或多个处理器可以被配置为当估计的噪声电平增加时，动态地降低对音频信号的至少一部分的有源噪声消除的应用，以获得音频信号的主动噪声消除版本的至少一部分。

    AUTOMATED GAIN MATCHING FOR MULTIPLE MICROPHONES
    7.
    发明申请
    AUTOMATED GAIN MATCHING FOR MULTIPLE MICROPHONES 有权
    自动增益匹配多个麦克风

    公开(公告)号：US20140341380A1

    公开(公告)日：2014-11-20

    申请号：US14139370

    申请日：2013-12-23

    Applicant: QUALCOMM Incorporated

    Inventor： Jimeng Zheng ,  Ian Ernan Liu ,  Dinesh Ramakrishnan ,  Deepak Kumar Challa

    IPC: H04R29/00

    CPC classification number: H04R29/006 ,  G10L25/84 ,  H04R3/005

    Abstract: A method includes receiving, at a processor, a first data frame at a first time from a first microphone. The method also includes receiving a second data frame at the first time from a second microphone. The method further includes calculating a power ratio of the first microphone and the second microphone based on the first data frame and the second data frame in response to determining that the first data frame and the second data frame are noise data frames.

    Abstract translation: 一种方法包括在处理器处从第一麦克风在第一时间接收第一数据帧。 该方法还包括在第一时间从第二麦克风接收第二数据帧。 该方法还包括响应于确定第一数据帧和第二数据帧是噪声数据帧，基于第一数据帧和第二数据帧计算第一麦克风和第二麦克风的功率比。

    Directional noise cancelling headset with multiple feedforward microphones
    8.
    发明授权
    Directional noise cancelling headset with multiple feedforward microphones 有权

    公开(公告)号：US10755690B2

    公开(公告)日：2020-08-25

    申请号：US16004881

    申请日：2018-06-11

    Applicant: QUALCOMM Incorporated

    Inventor： Asif Mohammad ,  Catalin Lacatus ,  Deepak Kumar Challa ,  Louis Dominic Oliveira

    IPC: G10K11/178 ,  H04R1/10

    Abstract: A headphone device includes a speaker housing, a first feedforward microphone, and a second feedforward microphone. The first feedforward microphone is coupled to the speaker housing at a first location, and the second feedforward microphone is coupled to the speaker housing at a second location. The headphone device also includes an active noise cancelling (ANC) circuit configured to generate an anti-noise signal based on at least one of a first signal from the first feedforward microphone and a second signal from the second feedforward microphone. The headphone device also includes a speaker configured to generate an audio output at least partially based on the anti-noise signal.

    Limiting active noise cancellation output
    10.
    发明授权
    Limiting active noise cancellation output 有权
    限制主动噪声消除输出

    公开(公告)号：US09402132B2

    公开(公告)日：2016-07-26

    申请号：US14477685

    申请日：2014-09-04

    Applicant: QUALCOMM Incorporated

    Inventor： Hyun Jin Park ,  Deepak Kumar Challa ,  Song Wang ,  Dinesh Ramakrishnan

    IPC: H04R3/00 ,  G10K11/178

    CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/3039 ,  G10K2210/3056 ,  H04R2410/05

    Abstract: In general, techniques are described for limiting active noise cancellation output. As one example, an apparatus comprising one or more processors may perform the techniques. The one or more processors may be configured to, when an estimated noise level increases, dynamically lowering application of active noise cancellation to at least a portion of an audio signal to obtain at least a portion of an active noise cancelled version of the audio signal.

    Abstract translation: 通常，描述了用于限制有源噪声消除输出的技术。 作为一个示例，包括一个或多个处理器的装置可以执行这些技术。 一个或多个处理器可以被配置为当估计的噪声电平增加时，动态地降低对音频信号的至少一部分的有源噪声消除的应用，以获得音频信号的主动噪声消除版本的至少一部分。

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