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1. 发明公开

EP3080801A1 SYSTEMS AND METHODS FOR BANDLIMITING ANTI-NOISE IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION 有权
标题翻译：系统和噪声保护与自适应降噪个人音频设备的频带限制方法
公开(公告)号：EP3080801A1
公开(公告)日：2016-10-19
申请号：EP14792675.2
申请日：2014-10-13
申请人： Cirrus Logic, Inc.
发明人： ALDERSON, Jeffrey D.
IPC分类号： G10K11/178
摘要： A method may include adaptively generating an anti-noise signal from filtering a reference microphone signal with an adaptive filter in conformity with an error microphone signal and the reference microphone signal. The method may also include adjusting the response of the adaptive filter by combining injected noise with the reference microphone signal and receiving the injected noise by a copy of the adaptive filter so that the response of the copy is controlled by the adaptive filter adapting to cancel a combination of the ambient audio sounds and the injected noise and controlling the response of the adaptive filter with the coefficients adapted in the copy, whereby the injected noise is not present in the anti-noise signal and wherein each of a sample rate of the copy and a rate of adapting of the adaptive filter is significantly less than a sample rate of the adaptive filter.

2. 发明公开

EP2987160A1 SYSTEMS AND METHODS FOR HYBRID ADAPTIVE NOISE CANCELLATION 有权
标题翻译：系统和方法混合自适应降噪
公开(公告)号：EP2987160A1
公开(公告)日：2016-02-24
申请号：EP14710420.2
申请日：2014-02-20
申请人： Cirrus Logic, Inc.
发明人： ALDERSON, Jeffrey D.
IPC分类号： 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 a feedback filter having a response that generates a feedback anti-noise signal component from a playback corrected error, the playback corrected error based on a difference between an error microphone signal and a secondary path estimate, and wherein the anti-noise signal comprises at least the feedback anti-noise signal component, a secondary path estimate filter configured to model an electro-acoustic path of the source audio signal and have a response that generates a secondary path estimate from the source audio signal, and a secondary coefficient control block that shapes the response of the secondary path estimate adaptive filter in conformity with a source audio signal and the playback corrected error by adapting the response of the secondary path estimate adaptive filter to minimize the playback corrected error.

3. 发明授权

EP3155610B1 SYSTEMS AND METHODS FOR SELECTIVELY ENABLING AND DISABLING ADAPTATION OF AN ADAPTIVE NOISE CANCELLATION SYSTEM 有权
公开(公告)号：EP3155610B1
公开(公告)日：2020-08-05
申请号：EP15731449.3
申请日：2015-06-10
申请人： Cirrus Logic, Inc.
发明人： ALDERSON, Jeffrey D. , HENDRIX, Jon D. , ZHOU, Dayong
IPC分类号： G10K11/178 , H04R1/10 , H04R3/00 , H04R5/033

4. 发明授权

EP3080801B1 SYSTEMS AND METHODS FOR BANDLIMITING ANTI-NOISE IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION 有权
公开(公告)号：EP3080801B1
公开(公告)日：2020-03-25
申请号：EP14792675.2
申请日：2014-10-13
申请人： Cirrus Logic, Inc.
发明人： ALDERSON, Jeffrey D.
IPC分类号： G10K11/178

5. 发明公开

EP3155610A1 SYSTEMS AND METHODS FOR SELECTIVELY ENABLING AND DISABLING ADAPTATION OF AN ADAPTIVE NOISE CANCELLATION SYSTEM 有权
标题翻译：系统和选择性激活和DE自适应降噪系统的自适应方法
公开(公告)号：EP3155610A1
公开(公告)日：2017-04-19
申请号：EP15731449.3
申请日：2015-06-10
申请人： Cirrus Logic, Inc.
发明人： ALDERSON, Jeffrey D. , HENDRIX, Jon D. , ZHOU, Dayong
IPC分类号： G10K11/178 , H04R1/10 , H04R3/00 , G10L21/0208
摘要： 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.
摘要翻译：在本公开雅舞蹈，到自适应噪声消除系统可以包括控制器。该控制器可以被配置为确定矿度的自适应系数控制块的收敛的用于控制自适应噪声消除系统的适应性反应。所述控制器可以使所述自适应系数控制块的适应如果自适应响应的收敛程度是低于特定阈值，并且如果所述自适应响应的收敛程度是高于特定阈值，求做当自适应噪声消除系统中执行充分收敛，则自适应噪声消除系统可以通过禁用节省功率的自适应系数控制块的禁用适应其一个或多个组件。

6. 发明公开

EP2987163A1 SYSTEMS AND METHODS FOR ADAPTIVE NOISE CANCELLATION BY BIASING ANTI-NOISE LEVEL 有权
标题翻译：系统和自适应降噪方法通过斜裁的防噪声电平
公开(公告)号：EP2987163A1
公开(公告)日：2016-02-24
申请号：EP14711085.2
申请日：2014-02-28
申请人： Cirrus Logic, Inc.
发明人： YONG, Chin Huang , ALDERSON, Jeffrey D.
IPC分类号： G10K11/178
CPC分类号： G10K11/16 , G10K11/178 , G10K11/17817 , G10K11/17833 , G10K11/17881 , G10K11/17885 , G10K2210/1081 , G10K2210/3014 , G10K2210/3017 , G10K2210/3022 , G10K2210/3027 , G10K2210/30351
摘要： A processing circuit may comprise an adaptive filter having a response generating an anti-noise signal from a reference microphone signal, a secondary path estimate filter modeling an electro-acoustic path of a source audio signal, a biasing portion that generates a scaled anti-noise signal by applying a scaling factor and the response of the secondary path estimate filter to the anti-noise signal, and a coefficient control block that shapes the response of the adaptive filter in conformity with the reference microphone signal and a modified playback corrected error signal by adapting the response of the adaptive filter to minimize ambient audio sounds in the error microphone signal, wherein the playback corrected error is based on a difference between the error microphone signal and the source audio signal and the modified playback corrected error signal is based on a difference between the playback corrected error signal and the scaled anti-noise signal.

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