-
公开(公告)号：US08650237B2
公开(公告)日：2014-02-11
申请号：US12731074
申请日：2010-03-24
IPC分类号： G06F17/10
摘要： Adaptive processing of an input signal is achieved by offline analysis, with inline processing comprising an adaptive filter. The method comprises passing the input signal through an adaptive time domain filter to produce an output signal. The input signal and/or output signal is used as an offline analysis signal. The analysis signal is transformed into a transform domain (eg frequency domain) to produce a transformed analysis signal. The transformed analysis signal is analyzed, for example by ADRO, to produce a plurality of desired gains each corresponding to a respective transform domain sub-band. A time domain filter characteristic is synthesized to at least approach the desired gains. The adaptive filter is updated with the synthesized filter characteristic. Minimum phase adaptive filter techniques are found to possess particular benefits in this scheme.
-
公开(公告)号：US08331582B2
公开(公告)日：2012-12-11
申请号：US10596122
申请日：2004-08-11
IPC分类号： H04R3/00
CPC分类号： H04R1/406 , H04R3/005 , H04R25/407 , H04R2499/11
摘要： The invention relates to adaptive directional systems, and more particularly to a method and apparatus for producing adaptive directional signals. The invention may be applied to the provision of audio frequency adaptive directional microphone systems for devices such as hearing aids and mobile telephones. The method involves constructing the adaptive directional signal (46) from a weighted sum of a first signal (42A) having an omni-directional polar pattern and a second signal (42B) having a bi-directional polar pattern, wherein the weights are calculated to give the combined signal a constant gain in a predetermined direction and to minimize the power of the combined signal. The method has particular application in producing signals in digital hearing aids, the predetermined direction being in the forward direction with respect to the wearer.
摘要翻译： 本发明涉及自适应定向系统，更具体地涉及用于产生自适应方向信号的方法和装置。 本发明可以应用于为诸如助听器和移动电话的设备提供音频自适应定向麦克风系统。 该方法包括从具有全向极坐标图案的第一信号（42A）和具有双向极坐标图案的第二信号（42B）的加权和构建自适应方向信号（46），其中权重被计算为 给予组合信号在预定方向上的恒定增益并且使组合信号的功率最小化。 该方法特别适用于在数字助听器中产生信号，预定方向相对于佩戴者处于向前方向。
-
公开(公告)号：US20070014419A1
公开(公告)日：2007-01-18
申请号：US10596122
申请日：2004-08-11
申请人： Brenton Steele
发明人： Brenton Steele
IPC分类号： H04R3/00
CPC分类号： H04R1/406 , H04R3/005 , H04R25/407 , H04R2499/11
摘要： The invention relates to adaptive directional systems, and more particularly to a method and apparatus for producing adaptive directional signals. The invention may be applied to the provision of audio frequency adaptive directional microphone systems for devices such as hearing aids and mobile telephones. The method involves constructing the adaptive directional signal (46) from a weighted sum of a first signal (42A) having an omni-directional polar pattern and a second signal (42B) having a bi-directional polar pattern, wherein the weights are calculated to give the combined signal a constant gain in a predetermined direction and to minimise the power of the combined signal. The method has particular application in producing signals in digital hearing aids, the predetermined direction being in the forward direction with respect to the wearer.
摘要翻译： 本发明涉及自适应定向系统，更具体地涉及用于产生自适应方向信号的方法和装置。 本发明可以应用于为诸如助听器和移动电话的设备提供音频自适应定向麦克风系统。 该方法包括从具有全向极坐标图案的第一信号（42A）和具有双向极坐标图案的第二信号（42B）的加权和构建自适应方向信号（46），其中权重为 被计算为使组合信号在预定方向上具有恒定增益并且使组合信号的功率最小化。 该方法特别适用于在数字助听器中产生信号，预定方向相对于佩戴者处于向前方向。
-
公开(公告)号：US20150055788A1
公开(公告)日：2015-02-26
申请号：US14363288
申请日：2012-12-21
发明人： Justin Andrew Zakis
IPC分类号： H04R3/00
CPC分类号： H04R3/002 , G10L21/0216 , G10L2021/02165 , H04R3/005 , H04R5/033 , H04R25/407 , H04R2410/07 , H04R2499/11
摘要： A method of processing digitized microphone signal data in order to detect wind noise. First and second sets of signal samples are obtained simultaneously from two microphones. A first number of samples in the first set which are greater than a first predefined comparison threshold is determined. A second number of samples in the first set which are less than the first predefined comparison threshold is determined. A third number of samples in the second set which are greater than a second predefined comparison threshold is determined. A fourth number of samples in the second set which are less than the second predefined comparison threshold is determined. If the first number and second number differ from the third number and fourth number to an extent which exceeds a predefined detection threshold, e.g. as determined by a Chi-squared test, then an indication that wind noise is present is output.
摘要翻译： 一种处理数字化麦克风信号数据以便检测风噪声的方法。 从两个麦克风同时获得第一组和第二组信号样本。 确定第一组中大于第一预定义比较阈值的第一数量样本。 确定小于第一预定义比较阈值的第一组中的第二数量样本。 确定第二组中大于第二预定比较阈值的第三数量样本。 确定小于第二预定义比较阈值的第二组中的第四数量样本。 如果第一号码和第二号码不同于第三号码和第四号码到超过预定义的检测阈值的程度，例如， 如通过卡方检验确定的，则输出存在风噪声的指示。
-
公开(公告)号：US20160227320A1
公开(公告)日：2016-08-04
申请号：US15021289
申请日：2014-09-10
CPC分类号： H04R5/027 , H04R5/04 , H04S1/002 , H04S2400/01 , H04S2400/15
摘要： A method of adaptively mapping a plurality of microphone signals to a multi-channel audio signal, for example to capture stereo audio from a device held in variable orientations. At least first and second microphone signals, from respective first and second spaced apart microphones, are obtained. A device orientation signal is also obtained from a device orientation sensor. The microphone signals are adaptively mapped, based on the device orientation signal, to produce a first audio signal channel of a multi-channel audio signal. The first and second microphone signals are also adaptively mapped, based on the device orientation signal, to produce a second audio signal channel of a multi-channel audio signal.
摘要翻译： 一种将多个麦克风信号自适应地映射到多声道音频信号的方法，例如从以可变方向保持的设备捕获立体声音频。 至少从相应的第一和第二间隔开的麦克风获得第一和第二麦克风信号。 器件取向信号也可从器件方位传感器获得。 麦克风信号基于设备取向信号被自适应地映射，以产生多声道音频信号的第一音频信号通道。 第一麦克风信号和第二麦克风信号也基于设备取向信号自适应地映射，以产生多声道音频信号的第二音频信号信道。
-
公开(公告)号：US09271090B2
公开(公告)日：2016-02-23
申请号：US12746913
申请日：2008-12-08
CPC分类号： H04R25/453 , H04R3/02 , H04R2225/43
摘要： This invention concerns a method, and a device, for feedback cancellation. This invention also concerns a computer program product comprising computer program code means to make a computer execute a procedure for feedback cancellation. The method comprises providing an adaptive feedback cancellation filter which adapts under the control of a control module, and filtering at least one input of the control module to suppress correlated signals from the input prior to the control module operating upon the input. The device comprises an adaptive feedback cancellation filter, a control module and at least one filter. The control module controls adaptation of the adaptive feedback cancellation filter. The filter suppresses correlated signals from an input to the control module prior to the control module operating upon the input.
摘要翻译： 本发明涉及一种用于反馈消除的方法和装置。 本发明还涉及一种计算机程序产品，其包括使计算机执行用于反馈消除的过程的计算机程序代码装置。 该方法包括提供在控制模块的控制下适配的自适应反馈消除滤波器，以及对控制模块的至少一个输入进行滤波，以在控制模块在输入之前操作时抑制来自输入的相关信号。 该装置包括自适应反馈消除滤波器，控制模块和至少一个滤波器。 控制模块控制自适应反馈消除滤波器的自适应。 在控制模块对输入进行操作之前，滤波器抑制从输入到控制模块的相关信号。
-
公开(公告)号：US07774396B2
公开(公告)日：2010-08-10
申请号：US11283540
申请日：2005-11-18
IPC分类号： G06F17/10
CPC分类号： G10L19/0204 , H03H21/0027
摘要： Adaptive processing of an input signal is achieved by offline analysis, with inline processing comprising an adaptive filter. The method comprises passing the input signal through an adaptive time domain filter to produce an output signal. The input signal and/or output signal is used as an offline analysis signal. The analysis signal is transformed into a transform domain (eg frequency domain) to produce a transformed analysis signal. The transformed analysis signal is analysed, for example by ADRO, to produce a plurality of desired gains each corresponding to a respective transform domain sub-band. A time domain filter characteristic is synthesised to at least approach the desired gains. The adaptive filter is updated with the synthesised filter characteristic. Minimum phase adaptive filter techniques are found to possess particular benefits in this scheme.
摘要翻译： 通过离线分析实现输入信号的自适应处理，其中内联处理包括自适应滤波器。 该方法包括使输入信号通过自适应时域滤波器以产生输出信号。 输入信号和/或输出信号用作离线分析信号。 分析信号被转换成变换域（例如频域）以产生变换分析信号。 例如通过ADRO分析变换的分析信号，以产生多个期望的增益，每个增益对应于相应的变换域子带。 合成时域滤波器特性以至少接近期望的增益。 自适应滤波器用合成滤波器特性进行更新。 发现最小相位自适应滤波技术在该方案中具有特别的优点。
-
公开(公告)号：US08385864B2
公开(公告)日：2013-02-26
申请号：US12224219
申请日：2006-11-23
CPC分类号： H03H21/0012 , G10L21/0364 , H03H17/0211 , H03H17/0294 , H03H21/0016 , H04R25/505 , H04R2225/43
摘要： Adaptively processing an input signal, such as an input signal of a hearing aid. The input signal is passed through an adaptive time domain filter to produce an output signal. At least one of the input signal and the output signal is used as an analysis signal. The analysis signal is transformed into a transform domain to produce a transformed analysis signal, which is analyzed to produce a desired gain for each respective transform domain sub-band. A minimum phase time domain filter characteristic is synthesized which approaches the desired gains. The adaptive filter is updated with the synthesized filter characteristic.
摘要翻译： 自适应地处理输入信号，例如助听器的输入信号。 输入信号通过自适应时域滤波器产生输出信号。 使用输入信号和输出信号中的至少一个作为分析信号。 将分析信号变换为变换域以产生经变换的分析信号，其被分析以产生每个相应变换域子带的期望增益。 合成接近期望增益的最小相位时域滤波器特性。 自适应滤波器用合成滤波器特性进行更新。
-
公开(公告)号：US20160155453A1
公开(公告)日：2016-06-02
申请号：US14904365
申请日：2014-07-11
IPC分类号： G10L21/0232 , H04R5/04 , G10L25/18 , H04R3/00 , H04S1/00
CPC分类号： G10L21/0232 , G10L25/18 , H04R3/005 , H04R5/04 , H04R2410/05 , H04R2410/07 , H04R2499/11 , H04S1/002 , H04S2400/09 , H04S2400/15 , H04S2420/07
摘要： A method of wind noise reduction. Left side and right side microphone signals are obtained. In a first stage wind noise reduction is applied to a first sub-band of one of the signals, below a spectral threshold NA. In a second stage the wind noise reduced first side signal, and the second side signal, are both split into a sub-band below a threshold NB less than NA. The sub-band of the first side signal is mixed with the sub-band of the second side signal to produce an aggregate third sub-band signal having reduced wind noise, which is recombined with the respective sub-bands above the threshold NB to produce output first and second side signals.
摘要翻译： 一种降低风噪声的方法。 获得左侧和右侧麦克风信号。 在第一级中，将噪声降低应用于信号之一的第一子带，低于谱阈值NA。 在第二阶段，风噪声减小了第一侧信号，并且第二侧信号被分成低于小于NA的阈值NB以下的子带。 第一侧信号的子带与第二侧信号的子带混合以产生具有降低的风噪声的聚合第三子带信号，其与阈值NB上方的相应子带重组以产生 输出第一和第二侧信号。
-
公开(公告)号：US20100198899A1
公开(公告)日：2010-08-05
申请号：US12731074
申请日：2010-03-24
IPC分类号： G06F17/14
CPC分类号： G10L19/0204 , H03H21/0027
摘要： Adaptive processing of an input signal is achieved by offline analysis, with inline processing comprising an adaptive filter. The method comprises passing the input signal through an adaptive time domain filter to produce an output signal. The input signal and/or output signal is used as an offline analysis signal. The analysis signal is transformed into a transform domain (eg frequency domain) to produce a transformed analysis signal. The transformed analysis signal is analyzed, for example by ADRO, to produce a plurality of desired gains each corresponding to a respective transform domain sub-band. A time domain filter characteristic is synthesized to at least approach the desired gains. The adaptive filter is updated with the synthesized filter characteristic. Minimum phase adaptive filter techniques are found to possess particular benefits in this scheme.
摘要翻译： 通过离线分析实现输入信号的自适应处理，其中内联处理包括自适应滤波器。 该方法包括使输入信号通过自适应时域滤波器以产生输出信号。 输入信号和/或输出信号用作离线分析信号。 分析信号被转换成变换域（例如频域）以产生变换分析信号。 例如通过ADRO分析变换的分析信号，以产生多个期望的增益，每个增益对应于相应的变换域子带。 合成时域滤波器特性以至少接近期望的增益。 自适应滤波器用合成滤波器特性进行更新。 发现最小相位自适应滤波技术在该方案中具有特别的优点。
-
-
-
-
-
-
-
-
-
搜索结果
11 条记录 (耗时 0.017 秒)
