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81. 发明授权

US09852726B2 Background noise reduction in an audio device 有权
公开(公告)号：US09852726B2
公开(公告)日：2017-12-26
申请号：US15056921
申请日：2016-05-11
申请人： Motorola Mobility LLC
发明人： Snehitha Singaraju
IPC分类号： H04B15/00 , G10K11/178
CPC分类号： G10K11/1785 , G10K11/17885 , G10K2210/108 , G10K2210/3056
摘要： A method and apparatus are for determining one or more background noise characteristics, determining one or more incoming audio characteristics; and generating a combined audio signal comprising an active noise cancellation (ANC) component and a modified incoming audio (MIA) component. The ANC component is determined based on at least one of the one or more incoming audio characteristics and the background noise characteristics. Each of a limit of the ANC component and a limit of the MIA component is dynamically controlled to be less than or equal to a system limit, wherein a limit of the combined signal is approximately at the system limit.

82. 发明授权

US09812114B2 Systems and methods for controlling adaptive noise control gain 有权
公开(公告)号：US09812114B2
公开(公告)日：2017-11-07
申请号：US15058866
申请日：2016-03-02
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Jeffrey D. Alderson , Jon D. Hendrix , Sang-Ik Terry Cho , Chin Huang Yong , John L. Melanson
IPC分类号： A61F11/06 , G10K11/16 , G10K11/178
CPC分类号： G10K11/178 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/3014 , G10K2210/3016 , G10K2210/3028 , G10K2210/3056
摘要： A method may include adaptively generating an anti-noise signal for countering the effects of ambient audio sounds at an acoustic output of the transducer by adapting a response of an adaptive filter that filters a reference microphone signal in conformity with an error microphone signal and the reference microphone signal to minimize the ambient audio sounds in the error microphone, generating a scaled anti-noise signal by applying a scaling factor to the anti-noise signal, further adjusting the response of the adaptive filter independent of a source audio signal by altering an input to the coefficient control block of the adaptive filter to compensate for the scaling factor, and combining the scaled anti-noise signal with the source audio signal to generate an audio signal provided to the transducer.

83. 发明授权

US09728179B2 Calibration and stabilization of an active noise cancelation system 有权
公开(公告)号：US09728179B2
公开(公告)日：2017-08-08
申请号：US14885876
申请日：2015-10-16
申请人： AVNERA CORPORATION
发明人： Amit Kumar , Thomas Irrgang , Shankar Rathoud , Eric Sorensen
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K11/17813 , G10K11/1788 , G10K11/17881 , G10K2210/1081 , G10K2210/3025 , G10K2210/3026 , G10K2210/3027 , G10K2210/3045 , G10K2210/3055 , G10K2210/3056 , G10K2210/3214 , G10K2210/504 , H04R1/1083 , H04R29/00 , H04R2460/01
摘要： A method of calibrating an earphone may include: securing an ANC earphone to a calibration fixture, the calibration fixture including an ear model configured to support the ANC earphone, the ear model having an ear canal configured to anatomically resemble a human ear canal and a concha configured to anatomically resemble a human ear concha, the ear canal extending from the concha to an inner end of the ear canal; generating, with the ANC earphone, an audio signal based on a reference tone; determining a characteristic of the audio signal; comparing the characteristic of the audio signal to a previously determined reference characteristic; and adjusting a gain value of the ANC earphone based on the comparing. Additional methods and apparatus are also disclosed.

84. 发明授权

US09640168B2 Noise cancellation with dynamic range compression 有权
公开(公告)号：US09640168B2
公开(公告)日：2017-05-02
申请号：US14726777
申请日：2015-06-01
申请人： ElaraTek Ltd.
发明人： Amir Nooralahiyan , Bahador Pakbaz
IPC分类号： A61F11/06 , G10K11/16 , H03B29/00 , G10K11/178
CPC分类号： G10K11/178 , G10K11/17823 , G10K11/17837 , G10K2210/1081 , G10K2210/3016 , G10K2210/3056
摘要： An audio processor (200) for a hearing device has a noise estimator (100), an adaptive noise canceller (110), and a dynamic range compressor (120) to provide a gain according to a signal strength of an input signal. A signal strength processor (130) determines a signal strength dependent noise cancellation parameter, and the adaptive noise canceller provides noise cancellation of the input signal according to an estimated noise from the noise estimator, and according to the signal strength dependent noise cancellation parameter, so as to provide less noise cancellation when the input signal has higher signal strength than when the input signal has a lower signal strength. This helps retain the desirable environment or ambient type noise, present when the signal strength is higher, while providing more cancellation of undesirable circuit type noise when there is low input signal strength.

85. 发明申请

US20170053638A1 HYBRID ADAPTIVE NOISE CANCELLATION SYSTEM WITH FILTERED ERROR MICROPHONE SIGNAL 有权
标题翻译：混合自适应噪声消除系统与过滤错误麦克风信号
公开(公告)号：US20170053638A1
公开(公告)日：2017-02-23
申请号：US14832585
申请日：2015-08-21
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Dayong Zhou , Yang Lu , Ning Li , Nitin Kwatra , Antonio J. Miller
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K11/16 , G10K11/17817 , G10K11/17879 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/1082 , G10K2210/3017 , G10K2210/3022 , G10K2210/3026 , G10K2210/3027 , G10K2210/3035 , G10K2210/3039 , G10K2210/3045 , G10K2210/3049 , G10K2210/3053 , G10K2210/3055 , G10K2210/3056 , G10K2210/509 , H04R1/1083 , H04R3/002 , H04R3/005 , H04R2410/05 , H04R2460/01 , H04R2499/11
摘要： In accordance with systems and methods of the present disclosure, an adaptive noise cancellation system may include an alignment filter configured to correct misalignment of a reference microphone signal and an error microphone signal by generating a misalignment correction signal.
摘要翻译：根据本公开的系统和方法，自适应噪声消除系统可以包括对准滤波器，其被配置为通过产生未对准校正信号来校正参考麦克风信号和误差麦克风信号的未对准。

86. 发明授权

US09552805B2 Systems and methods for performance and stability control for feedback adaptive noise cancellation 有权
标题翻译：用于反馈自适应噪声消除的性能和稳定性控制的系统和方法
公开(公告)号：US09552805B2
公开(公告)日：2017-01-24
申请号：US14577519
申请日：2014-12-19
申请人： Cirrus Logic, Inc.
发明人： Yang Lu , Dayong Zhou , Antonio J. Miller , Ning Li
IPC分类号： G10K11/178 , H04R1/10
CPC分类号： G10K11/178 , G10K11/17833 , G10K11/17875 , G10K11/17881 , G10K2210/1081 , G10K2210/3056 , G10K2210/503 , G10K2210/506 , H04R1/1083 , H04R2460/01
摘要： A method for cancelling ambient audio sounds in the proximity of a transducer may include receiving an error microphone signal indicative of the output of the transducer and ambient audio sounds at the transducer. The method may also include generating an anti-noise signal for countering the effects of ambient audio sounds at an acoustic output of the transducer, wherein generating the anti-noise signal comprises applying a feedback filter having a response that generates a feedback anti-noise signal based on the error microphone signal and applying a variable gain element in series with the feedback filter. The method may further include monitoring whether an ambient audio event is occurring that could cause the feedback filter to generate an undesirable component in the anti-noise signal and controlling the gain of the variable gain element to reduce the undesirable component.
摘要翻译：用于消除传感器附近的环境音频声音的方法可以包括接收指示换能器的输出的误差麦克风信号和换能器处的环境音频声音。该方法还可以包括产生用于抵消在换能器的声输出处的环境音频声音的影响的抗噪声信号，其中产生抗噪声信号包括应用具有产生反馈抗噪声信号的响应的反馈滤波器基于误差麦克风信号并与反馈滤波器串联地施加可变增益元件。该方法还可以包括监视是否正在发生可能导致反馈滤波器在抗噪声信号中产生不期望的分量并且控制可变增益元件的增益以减少不期望的分量的环境音频事件。

87. 发明授权

US09319784B2 Frequency-shaped noise-based adaptation of secondary path adaptive response in noise-canceling personal audio devices 有权
标题翻译：噪声消除个人音频设备中的二次路径自适应响应的基于频率的基于噪声的适应
公开(公告)号：US09319784B2
公开(公告)日：2016-04-19
申请号：US14252235
申请日：2014-04-14
申请人： Cirrus Logic, Inc.
发明人： Yang Lu , Dayong Zhou , Ning Li
IPC分类号： A61F11/06 , H04R3/00 , H04R1/08 , G10K11/178 , H04R1/10
CPC分类号： H04R3/002 , G10K11/178 , G10K11/17817 , G10K11/17854 , G10K11/17881 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/3028 , G10K2210/3049 , G10K2210/3056 , H04R1/08 , H04R1/1083 , H04R3/005 , H04R2410/05 , H04R2460/01
摘要： A personal audio device includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise is injected so that the adaptation of the secondary path estimating adaptive filter can be maintained, irrespective of the presence and amplitude of the source audio. The noise is shaped by a noise shaping filter that has a response controlled in conformity with at least one parameter of the secondary path response.
摘要翻译：个人音频设备包括自适应噪声消除（ANC）电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入扬声器或其他换能器输出以引起环境音频声音的消除。在扬声器附近还提供误差麦克风以提供指示噪声消除的有效性的误差信号。二次路径估计自适应滤波器用于估计通过换能器的噪声消除电路的电声路径，从而可以从误差信号中去除源音频。噪声被注入，使得可以维持二次路径估计自适应滤波器的适应，而不管源音频的存在和幅度如何。噪声通过噪声整形滤波器成形，该滤波器的响应受到与次要路径响应的至少一个参数相一致的控制。

88. 发明授权

US09294837B2 Vehicular active vibrational noise control apparatus 有权
标题翻译：车载有源振动噪声控制装置
公开(公告)号：US09294837B2
公开(公告)日：2016-03-22
申请号：US14220253
申请日：2014-03-20
申请人： HONDA MOTOR CO., LTD.
发明人： Kosuke Sakamoto , Toshio Inoue , Satoru Kikuchi , Takanori Yamamoto
IPC分类号： G10K11/16 , H04R3/00 , G10K11/178
CPC分类号： H04R3/002 , G10K11/17827 , G10K11/1783 , G10K11/17883 , G10K11/17885 , G10K2210/12821 , G10K2210/3014 , G10K2210/3039 , G10K2210/3056
摘要： A vehicular active vibrational noise control apparatus includes an amplitude limiter for limiting the amplitude of a canceling signal based on a signal level of an audio signal, and a vehicle speed detector for detecting the vehicle speed of a vehicle, which incorporates therein the vehicular active vibrational noise control apparatus. The amplitude limiter changes an amplitude limitation rule, which represents a relationship of a limiting value for the amplitude of the canceling signal to the signal level, depending on the vehicle speed, and limits the amplitude of the canceling signal based on the limiting value determined according to the amplitude limitation rule.
摘要翻译：车辆有源振动噪声控制装置包括：限幅器，用于根据音频信号的信号电平来限制消除信号的振幅;以及车速检测器，用于检测车辆的车速，其中车辆的主动振动噪声控制装置。幅度限制器根据车速改变幅值限制规则，其表示取消信号的振幅的极限值与信号电平的关系，并且基于根据车速确定的限制值来限制抵消信号的幅度到幅度限制规则。

89. 发明授权

US09294836B2 Systems and methods for adaptive noise cancellation including secondary path estimate monitoring 有权
标题翻译：用于自适应噪声消除的系统和方法，包括二次路径估计监测
公开(公告)号：US09294836B2
公开(公告)日：2016-03-22
申请号：US13952221
申请日：2013-07-26
申请人： Cirrus Logic, Inc.
发明人： Dayong Zhou , Yang Lu , Ning Li
IPC分类号： G10K11/16 , H04R3/00 , G10K11/178
CPC分类号： H04R3/002 , G10K11/16 , G10K11/178 , G10K11/17817 , G10K11/17833 , G10K2210/108 , G10K2210/1081 , G10K2210/3017 , G10K2210/3022 , G10K2210/3026 , G10K2210/3027 , G10K2210/3035 , G10K2210/3039 , G10K2210/3055 , G10K2210/3056 , G10K2210/503 , G10K2210/509
摘要： In accordance with methods and systems of the present disclosure, a processing circuit may implement at least one of: a feedback filter having a response that generates at least a portion of an anti-noise component from a playback corrected error, the playback corrected error based on a difference between the error microphone signal and a secondary path estimate; and a feedforward filter having a response that generates at least a portion of the anti-noise signal from a reference microphone signal. The processing circuit may also implement a secondary path estimate filter configured to model an electro-acoustic path of a source audio signal and have a response that generates a secondary path estimate from the source audio signal and a secondary path estimate performance monitor for monitoring performance of the secondary path estimate filter in modeling the electro-acoustic path.
摘要翻译：根据本公开的方法和系统，处理电路可以实现以下至少一个：具有响应的反馈滤波器，该响应从回放校正误差产生抗噪声分量的至少一部分，基于回放校正误差在误差麦克风信号和次路径估计之间的差异; 以及前馈滤波器，其具有从参考麦克风信号产生抗噪声信号的至少一部分的响应。处理电路还可以实现二次路径估计滤波器，其被配置为对源音频信号的电声路径进行建模，并且具有从源音频信号生成次路径估计的响应，以及用于监视源音频信号的次级路径估计性能监视器二次路径估计滤波器对电声路径进行建模。

90. 发明申请

US20150172815A1 SYSTEMS AND METHODS FOR FEEDBACK DETECTION 有权
标题翻译：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
申请人： QUALCOMM Incorporated
发明人： Hyun Jin Park , Deepak Kumar Challa
IPC分类号： H04R3/02
CPC分类号： H04R3/02 , G10K11/17819 , G10K11/17833 , G10K2210/3026 , G10K2210/3027 , G10K2210/3056 , H04R25/453 , H04R2460/01
摘要： 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.
摘要翻译：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。

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