专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2013169436A2 NOISE BURST ADAPTATION OF SECONDARY PATH ADAPTIVE RESPONSE IN NOISE-CANCELING PERSONAL AUDIO DEVICES 审中-公开
标题翻译：噪音消除个人音乐设备中二次路自适应响应的噪声调整
公开(公告)号：WO2013169436A2
公开(公告)日：2013-11-14
申请号：PCT/US2013/036531
申请日：2013-04-15
申请人： CIRRUS LOGIC, INC.
发明人： HENDRIX, Jon, D. , ALDERSON, Jeffrey , MILLER, Antonio, John , LU, Yang
IPC分类号： G10K11/178
CPC分类号： G10K11/002 , G10K11/178 , G10K11/17817 , G10K2210/108 , G10K2210/3049
摘要： A personal audio device, such as a wireless telephone, generates an anti-noise signal from an error microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The 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 bursts are injected intermittently and the adaptation of the secondary path estimating adaptive filter controlled, so that the secondary path estimate can be maintained irrespective of the presence and amplitude of the source audio.
摘要翻译：诸如无线电话的个人音频设备从误差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它换能器输出中以引起环境声音的消除。误差麦克风也靠近扬声器提供，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。噪声突发被间歇地注入，并且二次路径估计自适应滤波器的适配被控制，使得可以维持辅助路径估计，而不管源音频的存在和幅度如何。

2. 发明申请

WO2012166273A2 AN ADAPTIVE NOISE CANCELING ARCHITECTURE FOR A PERSONAL AUDIO DEVICE 审中-公开
标题翻译：自适应噪声取消个人音乐设备的架构
公开(公告)号：WO2012166273A2
公开(公告)日：2012-12-06
申请号：PCT/US2012/035815
申请日：2012-04-30
申请人： CIRRUS LOGIC, INC.
发明人： HENDRIX, Jon, D. , KAMATH, Gautham, Devendra , KWATRA, Nitin , ABDOLLAHZADEH MILANI, Ali , ALDERSON, Jeffrey
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K11/17827 , G10K11/17854 , G10K11/17881 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/30232 , G10K2210/3026 , G10K2210/3028 , G10K2210/3051 , G10K2210/3055 , H04R1/1083 , H04R3/005
摘要： A personal audio device, such as a wireless telephone, 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 an error microphone signal that measures the output of an output transducer plus any ambient audio at that location and injects the anti-noise signal at the transducer output to cause cancellation of ambient audio sounds. A processing circuit uses the reference and error microphone to generate the anti- noise signal, which can be generated by an adaptive filter operating at a multiple of the ANC coefficient update rate. Downlink audio can be combined with the high data rate anti-noise signal by interpolation. High-pass filters in the control paths reduce DC offset in the ANC circuits, and ANC coefficient adaptation can be halted when downlink audio is not detected.
摘要翻译：诸如无线电话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和测量输出的输出的误差麦克风信号中产生抗噪声信号传感器加上该位置的任何环境音频，并将抗噪声信号注入换能器输出，以引起环境音频声音的消除。处理电路使用参考误差麦克风来产生抗噪声信号，该噪声信号可以由以ANC系数更新率的倍数操作的自适应滤波器生成。下行音频可以通过插值与高数据速率的抗噪声信号组合。控制路径中的高通滤波器减少ANC电路中的DC偏移，并且当未检测到下行链路音频时，可以停止ANC系数自适应。

3. 发明申请

WO2014149385A1 AMBIENT NOISE-BASED ADAPTATION OF SECONDARY PATH ADAPTIVE RESPONSE IN NOISE-CANCELING PERSONAL AUDIO DEVICES 审中-公开
标题翻译：基于噪声的噪声适应噪声消除个人音频设备中的二次路径自适应响应
公开(公告)号：WO2014149385A1
公开(公告)日：2014-09-25
申请号：PCT/US2014/017962
申请日：2014-02-24
申请人： CIRRUS LOGIC, INC.
发明人： ZHOU, Dayong , LU, Yang , HENDRIX, Jon D. , ALDERSON, Jeffrey
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K2210/1081 , G10K2210/3016 , G10K2210/3022 , G10K2210/3026 , G10K2210/3028
摘要： An adaptive noise canceler adapts a secondary path modeling response using ambient noise, rather than using another noise source or source audio as a training source. Anti-noise generated from a reference microphone signal using a first adaptive filter is used as the training signal for training the secondary path response. Ambient noise at the error microphone is removed from an error microphone signal, so that only anti-noise remains. A primary path modeling adaptive filter is used to modify the reference microphone signal to generate a source of ambient noise that is correlated with the ambient noise present at the error microphone, which is then subtracted from the error microphone signal to generate the error signal. The primary path modeling adaptive filter is previously adapted by minimizing components of the error microphone signal appearing in an output of the primary path adaptive filter while the anti-noise signal is muted.
摘要翻译：自适应噪声消除器使用环境噪声来适应辅助路径建模响应，而不是使用另一噪声源或源音频作为训练源。使用第一自适应滤波器从参考麦克风信号产生的抗噪声被用作用于训练辅助路径响应的训练信号。错误麦克风处的环境噪声从误差麦克风信号中消除，从而仅保留抗噪声。主路径建模自适应滤波器用于修改参考麦克风信号以产生与误差麦克风上存在的环境噪声相关的环境噪声源，然后将其从误差麦克风信号中减去以产生误差信号。先前通过使主路径自适应滤波器的输出中出现的误差麦克风信号的分量最小化，同时抗噪声信号被静音，来先适应主路径建模自适应滤波器。

4. 发明申请

WO2012166507A2 BANDLIMITING ANTI-NOISE IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION (ANC) 审中-公开
标题翻译：在具有自适应噪声消除（ANC）的个人音频设备中绑定防噪声
公开(公告)号：WO2012166507A2
公开(公告)日：2012-12-06
申请号：PCT/US2012/039314
申请日：2012-05-24
申请人： CIRRUS LOGIC, INC.
发明人： KWATRA, Nitin , ABDOLLAHZADEH MILANI, Ali , ALDERSON, Jeffrey
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K2210/108 , G10K2210/3012 , G10K2210/3017 , G10K2210/30231 , G10K2210/3028 , G10K2210/30391 , G10K2210/3226 , G10K2210/507 , G10K2210/508 , G10K2210/511 , G10K2210/512 , G10L21/0208 , G10L21/0364 , H04R1/1083
摘要： A personal audio device, such as a wireless telephone, includes noise canceling 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 provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. The anti-noise signal is adaptively generated to minimize the ambient audio sounds at the error microphone. A processing circuit that performs the adaptive noise canceling (ANC) function also filters one or both of the reference and/or error microphone signals, to bias the adaptation of the adaptive filter in one or more frequency regions to alter a degree of the minimization of the ambient audio sounds at the error microphone.
摘要翻译：诸如无线电话的个人音频设备包括噪声消除电路，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到扬声器或其他换能器输出中以引起环境音频声音的消除。在扬声器附近提供误差麦克风以测量换能器的输出，以便控制抗噪声信号的适应性，并估计从噪声消除电路通过换能器的电声路径。自适应地产生抗噪声信号以最小化误差麦克风处的环境音频声音。执行自适应噪声消除（ANC）功能的处理电路还对一个或两个参考和/或误差麦克风信号进行滤波，以将自适应滤波器的自适应偏置在一个或多个频率区域中，以改变最小化的程度错误麦克风处的环境声音发出声音。

5. 发明申请

WO2012166388A3 BANDLIMITING ANTI-NOISE IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION (ANC) 审中-公开
公开(公告)号：WO2012166388A3
公开(公告)日：2012-12-06
申请号：PCT/US2012/038512
申请日：2012-05-18
申请人： CIRRUS LOGIC, INC.
发明人： ALDERSON, Jeffrey , KWATRA, Nitin , KAMATH, Gautham, Devendra , ABDOLLAHZADEH MILANI, Ali , MELANSON, John, L.
IPC分类号： G10K11/178
摘要： A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal (ref) and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone (err) may also be provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit (30A) that performs the adaptive noise canceling function also either adjusts (37A) the frequency response of the anti-noise signal with respect to the reference microphone signal, and/or by adjusting (39) the response of the adaptive filter independent of the adaptation provided by the reference microphone signal.

6. 发明申请

WO2012166386A2 MIC COVERING DETECTION IN PERSONAL AUDIO DEVICES 审中-公开
标题翻译：个人音响设备的麦克风覆盖检测
公开(公告)号：WO2012166386A2
公开(公告)日：2012-12-06
申请号：PCT/US2012/038510
申请日：2012-05-18
申请人： CIRRUS LOGIC, INC.
发明人： KWATRA, Nitin , ALDERSON, Jeffrey , HENDRIX, Jon, D.
IPC分类号： G10K11/178
CPC分类号： G10L21/0208 , G10K11/175 , G10K11/178 , G10K2210/108 , G10K2210/30231 , G10K2210/30391 , G10K2210/503 , H04M1/20
摘要： A personal audio device, such as a wireless telephone, includes noise canceling 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 may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.
摘要翻译：诸如无线电话的个人音频设备包括噪声消除电路，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到扬声器或其他换能器输出中以引起环境音频声音的消除。还可以在扬声器附近提供误差麦克风以估计从噪声消除电路通过换能器的电声路径。处理电路使用参考和/或误差麦克风，可选地与提供用于捕获近端语音的麦克风一起，通过比较其接收的信号内容来确定参考或误差麦克风中的一个是否被阻挡，并采取行动以避免产生错误的抗噪声。

7. 发明申请

WO2014158446A1 ADAPTIVE-NOISE CANCELING (ANC) EFFECTIVENESS ESTIMATION AND CORRECTION IN A PERSONAL AUDIO DEVICE 审中-公开
标题翻译：自适应噪声消除（ANC）个人音频设备的有效性估计和校正
公开(公告)号：WO2014158446A1
公开(公告)日：2014-10-02
申请号：PCT/US2014/016824
申请日：2014-02-18
申请人： CIRRUS LOGIC, INC.
发明人： LI, Ning , MILLER, Antonio John , HENDRIX, Jon D. , SU, Jie , ALDERSON, Jeffrey , ABDOLLAHZADEH MILANI, Ali
IPC分类号： G10K11/178
CPC分类号： H04R3/002 , G10K11/178 , G10K2210/1081 , G10K2210/3016 , G10K2210/3026 , G10K2210/3028 , H04R1/1083 , H04R2460/01
摘要： Techniques for estimating adaptive noise canceling (ANC) performance in a personal audio device, such as a wireless telephone, provide robustness of operation by triggering corrective action when ANC performance is low, and/or by saving a state of the ANC system when ANC performance is high. An anti-noise signal is generated from a reference microphone signal and is provided to an output transducer along with program audio. A measure of ANC gain is determined by computing a ratio of a first indication of magnitude of an error microphone signal that provides a measure of the ambient sounds and program audio heard by the listener including the effects of the anti-noise, to a second indication of magnitude of the error microphone signal without the effects of the anti-noise. The ratio can be determined for different frequency bands in order to determine whether particular adaptive filters are trained properly.
摘要翻译：用于估计诸如无线电话的个人音频设备中的自适应噪声消除（ANC）性能的技术通过在ANC性能低时通过触发纠正动作来提供鲁棒性，和/或通过在ANC性能时保存ANC系统的状态高。从参考麦克风信号产生抗噪声信号，并将其与节目音频一起提供给输出变换器。 ANC增益的量度通过计算提供环境声音的度量的误差麦克风信号的幅度的第一指示和包括抗噪声的影响的听众听到的节目音频的第一指示与第二指示的误差麦克风信号的幅度没有抗噪声的影响。可以针对不同的频带来确定该比率，以便确定特定的自适应滤波器是否被适当地训练。

8. 发明申请

WO2013169483A1 DOWNLINK TONE DETECTION AND ADAPTION OF A SECONDARY PATH RESPONSE MODEL IN AN ADAPTIVE NOISE CANCELING SYSTEM 审中-公开
标题翻译：自适应噪声消除系统中的二次路径响应模式的下行音调检测和自适应
公开(公告)号：WO2013169483A1
公开(公告)日：2013-11-14
申请号：PCT/US2013/037942
申请日：2013-04-24
申请人： CIRRUS LOGIC, INC.
发明人： ZHOU, Dayong , LU, Yang , HENDRIX, Jon, D. , ALDERSON, Jeffrey , MILLER, Antonio, John , YONG, Chin , KAMATH, Gautham, Devendra
IPC分类号： G10K11/178
CPC分类号： G10K11/175 , G10K11/16 , G10K11/178 , G10K2210/00 , G10K2210/108 , G10K2210/3011 , G10K2210/30231 , G10K2210/3028 , G10K2210/30351 , G10K2210/503
摘要： An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal from a reference microphone signal that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone proximate the speaker provides an error signal. A secondary path estimating adaptive filter estimates the electro- acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Tones in the source audio, such as remote ringtones, present in downlink audio during initiation of a telephone call, are detected by a tone detector using accumulated tone persistence and non-silence hangover counting, and adaptation of the secondary path estimating adaptive filter is halted to prevent adapting to the tones. Adaptation of the adaptive filters is then sequenced so any disruption of the secondary path adaptive filter response is removed before allowing the anti-noise generating filter to adapt.
摘要翻译：自适应噪声消除（ANC）电路自适应地从注入扬声器或其它换能器输出的参考麦克风信号产生抗噪声信号，以引起环境声音的消除。靠近扬声器的错误麦克风提供了错误信号。二次路径估计自适应滤波器估计来自噪声消除电路的电声路径通过换能器，使得源音频可以从误差信号中去除。在开始电话呼叫期间存在于下行链路音频中的源音频中的音调（例如远程铃声）由使用累积的音调持续性和非静音宿醉计数的音调检测器检测，并且停止辅助路径估计自适应滤波器的适配以防止适应色调。然后对自适应滤波器的适应进行排序，因此在允许抗噪声产生滤波器适应之前，去除二次路径自适应滤波器响应的任何中断。

9. 发明申请

WO2013169454A2 ERROR-SIGNAL CONTENT CONTROLLED ADAPTATION OF SECONDARY AND LEAKAGE PATH MODELS IN NOISE-CANCELING PERSONAL AUDIO DEVICES 审中-公开
标题翻译：噪声信号内容控制在噪声消除个人音频设备中的二级和漏洞路径模型的适应
公开(公告)号：WO2013169454A2
公开(公告)日：2013-11-14
申请号：PCT/US2013/037051
申请日：2013-04-18
申请人： CIRRUS LOGIC, INC.
发明人： ALDERSON, Jeffrey , HENDRIX, Jon, D. , LU, Yang
IPC分类号： G10K11/178
CPC分类号： G10K11/16 , G10K11/17819 , G10K11/17833 , G10K11/17881 , G10K11/17885 , G10K2210/108 , G10K2210/3023 , G10K2210/3055 , G10K2210/503 , G10K2210/505 , G10K2210/506
摘要： 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.
摘要翻译：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。

10. 发明申请

WO2013169437A1 SEQUENCED ADAPTATION OF ANTI-NOISE GENERATOR RESPONSE AND SECONDARY PATH RESPONSE IN AN ADAPTIVE NOISE CANCELING SYSTEM 审中-公开
标题翻译：抗噪声发生器响应的顺序适应和适应性噪声消除系统中的次要路径响应
公开(公告)号：WO2013169437A1
公开(公告)日：2013-11-14
申请号：PCT/US2013/036532
申请日：2013-04-15
申请人： CIRRUS LOGIC, INC.
发明人： ALDERSON, Jeffrey , HENDRIX, Jon, D. , ZHOU, Dayong , MILLER, Antonio, John , YONG, Chin , KAMATH, Gautham, Devendra
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K11/16 , G10K2210/00 , G10K2210/108 , G10K2210/3014 , G10K2210/3017 , G10K2210/3028 , G10K2210/30391 , G10L2021/02165 , H04B3/237
摘要： A personal audio device, such as a wireless telephone, 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 to 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. Adaptation of adaptive filters is sequenced so that update of their coefficients does not cause instability or error in the update. A level of the source audio with respect to the ambient audio can be determined to determine whether the system may generate erroneous anti-noise and/or become unstable.
摘要翻译：诸如无线电话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取消的环境音频声音。还提供了靠近扬声器的误差麦克风，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。对自适应滤波器的适应进行排序，以便更新其系数不会导致更新中的不稳定或错误。可以确定相对于环境音频的源音频的电平以确定系统是否可能产生错误的抗噪声和/或变得不稳定。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式