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公开(公告)号：US10249283B2
公开(公告)日：2019-04-02
申请号：US15669647
申请日：2017-08-04
Inventor： Dayong Zhou , Yang Lu , Jeffrey D. Alderson , Eric King
IPC: H04R3/04 , G10K11/178 , G10L25/21 , G10L25/51
Abstract: The handling of disturbances to audio signals may be improved with an adaptive noise cancellation (ANC) system that performs tone suppression and howl suppression in a collaborative manner. Such ANC systems may be configured to detect a first tone in an input signal at a first tone frequency and extract the detected first tone from the input signal. The ANC systems may also be configured to adaptively filter the extracted first tone to generate a second tone that has a magnitude that is approximately equal to a magnitude of the extracted first tone and a phase that is approximately opposite the phase of the extracted first tone. The ANC systems may be further configured to add the second tone to an intermediate signal that is based, at least in part, on the input signal to generate the output signal.
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公开(公告)号：US20190043467A1
公开(公告)日：2019-02-07
申请号：US15669647
申请日：2017-08-04
Inventor： Dayong Zhou , Yang Lu , Jeffrey D. Alderson , Eric King
IPC: G10K11/178 , G10L25/21 , G10L25/51 , H04R3/04
Abstract: The handling of disturbances to audio signals may be improved with an adaptive noise cancellation (ANC) system that performs tone suppression and howl suppression in a collaborative manner. Such ANC systems may be configured to detect a first tone in an input signal at a first tone frequency and extract the detected first tone from the input signal. The ANC systems may also be configured to adaptively filter the extracted first tone to generate a second tone that has a magnitude that is approximately equal to a magnitude of the extracted first tone and a phase that is approximately opposite the phase of the extracted first tone. The ANC systems may be further configured to add the second tone to an intermediate signal that is based, at least in part, on the input signal to generate the output signal.
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公开(公告)号：US10026388B2
公开(公告)日：2018-07-17
申请号：US15241375
申请日：2016-08-19
Inventor： Yang Lu , Ryan A. Hellman , Dayong Zhou
IPC: G10K11/178
CPC classification number: G10K11/178 , G10K2210/108 , G10K2210/1081 , G10K2210/3017 , G10K2210/3026 , G10K2210/3027 , G10K2210/3028 , G10K2210/3055
Abstract: A controller for an adaptive noise canceling (ANC) system simplifies the design of a stable control response by making the ANC gain of the system independent of a secondary path extending from a transducer of the ANC system to a sensor of the ANC system that measures the ambient noise. The controller includes a fixed filter having a predetermined fixed response, and a variable filter coupled together. The variable response filter compensates for variations of a transfer function of a secondary path that includes at least a path from a transducer of the ANC system to a sensor of the ANC system, so that the ANC gain is independent of the variations in the transfer function of the secondary path.
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公开(公告)号：US11333622B2
公开(公告)日：2022-05-17
申请号：US16842482
申请日：2020-04-07
Inventor： Emmanuel Marchais , Carl Lennart Ståhl , Eric Lindemann , Jason W. Lawrence , Dayong Zhou
Abstract: A method for determining a direct current impedance of a transducer may include receiving an input signal indicative of an electrical power consumed by the transducer and calculating, by a thermal model of the transducer, the direct current impedance based on the electrical power.
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公开(公告)号：US10720138B2
公开(公告)日：2020-07-21
申请号：US15495746
申请日：2017-04-24
Inventor： Dayong Zhou , John L. Melanson
IPC: G10K11/178 , H04M1/60 , H04M1/03
Abstract: The overall performance of an ANC system may be improved by configuring the ANC system to perform adaption in the frequency domain. The ANC systems may be configured to update an algorithm of an adaptive filter based, at least in part, on the first input signal, the second input signal, and a feedback signal that is based on an output of the adaptive filter. Updating may include changing parameters of the algorithm based on a SDR based, at least in part, on the first input signal. Updating may also include normalizing a step size and processing at least full band information for the input signal in a frequency domain to generate coefficient values for the algorithm. Updating may also include applying a frequency domain magnitude constraint on adaptive filter coefficients.
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Patent Agency Ranking
公开(公告)号：US20190139532A1
公开(公告)日：2019-05-09
申请号：US16236861
申请日：2018-12-31
Inventor： Dayong Zhou , John L. Melanson
IPC: G10K11/178
Abstract: The overall performance of an ANC system may be improved by configuring the ANC system to perform adaption in the frequency domain. The ANC systems may be configured to update an algorithm of an adaptive filter based, at least in part, on the first input signal, the second input signal, and a feedback signal that is based on an output of the adaptive filter. Updating may include changing parameters of the algorithm based on a SDR based, at least in part, on the first input signal. Updating may also include normalizing a step size and processing at least full band information for the input signal in a frequency domain to generate coefficient values for the algorithm. Updating may also include applying a frequency domain magnitude constraint on adaptive filter coefficients.
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17.发明申请FEEDBACK ADAPTIVE NOISE CANCELLATION (ANC) CONTROLLER AND METHOD HAVING A FEEDBACK RESPONSE PARTIALLY PROVIDED BY A FIXED-RESPONSE FILTER 有权反馈自适应噪声消除（ANC）控制器和方法具有部分由固定响应滤波器提供的反馈响应公开(公告)号：US20170053639A1
公开(公告)日：2017-02-23
申请号：US15241375
申请日：2016-08-19
Inventor： Yang Lu , Ryan A. Hellman , Dayong Zhou
IPC: G10K11/178
CPC classification number: G10K11/178 , G10K2210/108 , G10K2210/1081 , G10K2210/3017 , G10K2210/3026 , G10K2210/3027 , G10K2210/3028 , G10K2210/3055
Abstract: A controller for an adaptive noise canceling (ANC) system simplifies the design of a stable control response by making the ANC gain of the system independent of a secondary path extending from a transducer of the ANC system to a sensor of the ANC system that measures the ambient noise. The controller includes a fixed filter having a predetermined fixed response, and a variable filter coupled together. The variable response filter compensates for variations of a transfer function of a secondary path that includes at least a path from a transducer of the ANC system to a sensor of the ANC system, so that the ANC gain is independent of the variations in the transfer function of the secondary path.
Abstract translation: 用于自适应噪声消除（ANC）系统的控制器通过使系统的ANC增益与从ANC系统的换能器延伸到ANC系统的传感器的次级路径无关，从而简化了稳定控制响应的设计， 环境噪音 控制器包括具有预定固定响应的固定滤波器和耦合在一起的可变滤波器。 可变响应滤波器补偿二次路径的传递函数的变化，其包括至少从ANC系统的换能器到ANC系统的传感器的路径，使得ANC增益独立于传递函数的变化 的次要路径。
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公开(公告)号：US11217222B2
公开(公告)日：2022-01-04
申请号：US16516679
申请日：2019-07-19
Inventor： Dayong Zhou
IPC: G10K11/178
Abstract: An adaptive filter converts time domain samples of an input signal into frequency domain signals, dynamically adjusts a stability conditional number based on the frequency domain signals, and uses the dynamically adjusted stability conditional number to control step size normalization during adaptation of frequency domain coefficients of the adaptive filter. The stability control number may be global to a range of frequency bins based on a peak magnitude of the input signal and/or may be frequency bin-specific stability control numbers based on corresponding frequency bin-specific error signal magnitudes. The adaptive filter also dynamically adjusts a noise floor based on the frequency domain input signals and refrains from updating frequency domain coefficients when a magnitude of the frequency domain input signal associated with a frequency bin is greater than the dynamically adjusted noise floor.
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公开(公告)号：US20210020158A1
公开(公告)日：2021-01-21
申请号：US16516679
申请日：2019-07-19
Inventor： Dayong Zhou
IPC: G10K11/178
Abstract: An adaptive filter converts time domain samples of an input signal into frequency domain signals, dynamically adjusts a stability conditional number based on the frequency domain signals, and uses the dynamically adjusted stability conditional number to control step size normalization during adaptation of frequency domain coefficients of the adaptive filter. The stability control number may be global to a range of frequency bins based on a peak magnitude of the input signal and/or may be frequency bin-specific stability control numbers based on corresponding frequency bin-specific error signal magnitudes. The adaptive filter also dynamically adjusts a noise floor based on the frequency domain input signals and refrains from updating frequency domain coefficients when a magnitude of the frequency domain input signal associated with a frequency bin is greater than the dynamically adjusted noise floor.
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公开(公告)号：US20180308465A1
公开(公告)日：2018-10-25
申请号：US15495714
申请日：2017-04-24
Inventor： Dayong Zhou , Yang Lu
IPC: G10K11/178
CPC classification number: G10K11/178 , G10K11/17823 , G10K11/17835 , G10K11/17854 , G10K11/17881 , G10K2210/108 , G10K2210/1081 , G10K2210/30231 , G10K2210/3026 , G10K2210/3028 , G10K2210/3045 , G10K2210/3054 , G10K2210/503 , H04W88/02
Abstract: The handling of disturbances to audio signals may be improved with an adaptive noise cancellation (ANC) system that performs frequency-domain adaption. The ANC systems may be configured to determine if a disturbance is present at a first frequency in the second input signal received from the reference microphone. The ANC systems may update an algorithm of an adaptive filter based, at least in part, on the first input signal, the second input signal, and a feedback signal that is based on an output of the adaptive filter by changing parameters of the algorithm such that the adaptive filter adapts around the first frequency differently than other frequencies when the disturbance is present.
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