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1. 发明申请

US20130191119A1 SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING PROGRAM 有权
标题翻译：信号处理设备，信号处理方法和信号处理程序
公开(公告)号：US20130191119A1
公开(公告)日：2013-07-25
申请号：US13877593
申请日：2011-09-15
申请人： Akihiko Sugiyama
发明人： Akihiko Sugiyama
IPC分类号： G10L21/0208
CPC分类号： G10L21/0208 , G10L21/0224 , G10L2021/02082 , G10L2021/02165 , H03H21/0012 , H03H21/0067 , H03H2021/0072 , H03H2021/0078 , H03H2021/0094 , H04B3/23 , H04M9/082
摘要： From a mixed signal in which a first signal and a second signal are mixed, the second signal is removed at low processing cost and without delay. As a result, an estimated first signal which has low residue of the second signal and low distortion is obtained.An estimated first signal is generated by subtracting a pseudo second signal which is estimated to be mixed in a first mixed signal in which a first signal and a second signal are mixed from the first mixed signal. The pseudo second signal is obtained by a first adaptive filter using a second mixed signal in which the first signal and the second signal are mixed in a different proportion from the first mixed signal. A coefficient update amount of the first adaptive filter is made smaller as compared with a case when the estimated first signal is smaller than the first mixed signal, in case the estimated first signal is larger than the first mixed signal.
摘要翻译：从第一信号和第二信号混合的混合信号中，以低处理成本且没有延迟地去除第二信号。结果，获得具有第二信号的低残差和低失真的估计的第一信号。通过从第一混合信号中减去第一混合信号和第二信号混合的第一混合信号中估计混合的伪第二信号来产生估计的第一信号。伪第二信号通过使用第二混合信号的第一自适应滤波器获得，其中第一信号和第二信号以与第一混合信号不同的比例混合。与估计的第一信号小于第一混合信号的情况相比，在估计的第一信号大于第一混合信号的情况下，使第一自适应滤波器的系数更新量更小。

2. 发明申请

US20080063229A1 BAND-LIMITED ADAPTIVE FEEDBACK CANCELLER FOR HEARING AIDS 有权
公开(公告)号：US20080063229A1
公开(公告)日：2008-03-13
申请号：US11935142
申请日：2007-11-05
申请人： Shawn Gao , Sigfrid Soli , Hsiang Chi
发明人： Shawn Gao , Sigfrid Soli , Hsiang Chi
IPC分类号： H04R25/00
CPC分类号： H04R25/453 , H03H21/0012 , H03H2021/0078 , H04R25/505 , H04R2430/03
摘要： An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwidth of the feedback cancellation signal, the distortion due to the adaptive filter is minimized and limited only to the unstable feedback regions. A relatively simple signal processing algorithm is used to produce highly effective results with minimal signal distortion.

3. 发明授权

US07292699B2 Band-limited adaptive feedback canceller for hearing aids 有权
标题翻译：用于助听器的带限自适应反馈消除器
公开(公告)号：US07292699B2
公开(公告)日：2007-11-06
申请号：US11089399
申请日：2005-03-23
申请人： Shawn X. Gao , Sigfrid D. Soli , Hsiang-Feg Chi
发明人： Shawn X. Gao , Sigfrid D. Soli , Hsiang-Feg Chi
IPC分类号： H04R25/00
CPC分类号： H04R25/453 , H03H21/0012 , H03H2021/0078 , H04R25/505 , H04R2430/03
摘要： An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwidth of the feedback cancellation signal, the distortion due to the adaptive filter is minimized and limited only to the unstable feedback regions. A relatively simple signal processing algorithm is used to produce highly effective results with minimal signal distortion.
摘要翻译：一种用于自适应地消除助听器和其他音频放大装置中的声反馈的改进方法。反馈消除限于包含所有不稳定频率的频带。通过限制反馈消除信号的带宽，由于自适应滤波器引起的失真被最小化并且仅限于不稳定的反馈区域。使用相对简单的信号处理算法来产生具有最小信号失真的高效结果。

4. 发明授权

US06907064B1 Waveform equalization controller and waveform equalization control method 失效
标题翻译：波形均衡控制器和波形均衡控制方法
公开(公告)号：US06907064B1
公开(公告)日：2005-06-14
申请号：US09698020
申请日：2000-10-30
申请人： Naoya Tokunaga , Kazuya Ueda
发明人： Naoya Tokunaga , Kazuya Ueda
IPC分类号： H04N7/015 , H03H7/30 , H03H7/40 , H03H21/00 , H04L25/03
CPC分类号： H03H21/0012 , H03H2021/0078 , H04L2025/03375 , H04L2025/03617 , H04L2025/03687
摘要： A waveform equalization controller which combines a follow-up property when the distortion is varied and there is a higher convergence speed at the initial operation, and a higher stability at a low C/N time, and which realizes a high performance and a low cost in a waveform equalizer. The waveform equalization controller controls the updating of a tap coefficient, and comprises a waveform equalizer for reducing a transmission line distortion of an input signal based on a LMS algorithm, an error estimation unit for estimating an error signal from an output signal of the waveform equalizer and outputting the error signal, a step size decision unit for generating a step size having an arbitrary size and outputting the step size, and a coefficient updating amount calculation unit for calculating a tap coefficient updating amount based on the error signal, the step size and a tap coefficient updating data.
摘要翻译：一种波形均衡控制器，其在失真变化时具有跟随特性，并且在初始操作时具有较高的收敛速度，并且在低C / N时间具有更高的稳定性，并且实现了高性能和低成本在波形均衡器中。波形均衡控制器控制抽头系数的更新，并且包括用于基于LMS算法减少输入信号的传输线失真的波形均衡器，用于从波形均衡器的输出信号估计误差信号的误差估计单元并输出误差信号;步长决定单元，用于生成具有任意大小的步长并输出步长;以及系数更新量计算单元，用于基于误差信号计算抽头系数更新量，步长和抽头系数更新数据。

5. 发明申请

US20020090079A1 METHOD AND APPARATUS FOR SETTING A STEP SIZE FOR AN ADAPTIVE FILTER COEFFICIENT OF AN ECHO CANCELLER 有权
标题翻译：用于设置ECHO CANCELLER自适应滤波器系统的步长尺寸的方法和装置
公开(公告)号：US20020090079A1
公开(公告)日：2002-07-11
申请号：US09266280
申请日：1999-03-11
发明人： JAMES ALLEN STEPHENS , JAMES BRIAN PIKET , ERNEST PEI-CHING CHEN , WILLIAM CHUNHUNG YIP
IPC分类号： H04M009/08
CPC分类号： H04M9/082 , H03H2021/0078
摘要： The step sizes for tap positions of an adaptive filter (124) in an echo canceller (125) for canceling an echo signal are individually selected based upon a profile of the echo environment. A training signal (112) is injected into the echo canceller and to the echo path during a training interval, or period. The adaptive filter profiles the echo path during the training interval. Respective step sizes nullnullknull for the tap positions are generated as a function of the echo profile so generated.
摘要翻译：基于回波环境的轮廓，单独地选择用于消除回波信号的回波消除器（125）中的自适应滤波器（124）的抽头位置的步长。训练信号（112）在训练间隔或周期期间被注入回波消除器和回波路径。自适应滤波器在训练间隔期间对回波路径进行轮廓。作为抽头位置的相应步长α[k]被生成为所生成的回波曲线的函数。

6. 发明授权

US06351457B1 Method of and apparatus for identifying unknown system 失效
标题翻译：识别未知系统的方法和装置
公开(公告)号：US06351457B1
公开(公告)日：2002-02-26
申请号：US09188201
申请日：1998-11-09
申请人： Akihiko Sugiyama
发明人： Akihiko Sugiyama
IPC分类号： H04B320
CPC分类号： H04B3/23 , H03H2021/0078 , H03H2021/0089
摘要： For identifying an unknown system such as a transmission line or a spatial acoustical coupling, tap coefficients are arranged at taps of an adaptive filter which correspond to a part of an impulse response waveform other than a flat delay part of the impulse response, thus attaining reduction of the convergence time and residual errors without resulting in errors of tap coefficients and tap positions even when a highly nonstationary signal is received. A tap control circuit 91 includes an input signal evaluation circuit 170, which evaluates input signal samples received from delay elements 201 to 20N, sets step sizes to zero and generate a signal for stopping tap position control according to the result of evaluation.
摘要翻译：为了识别诸如传输线或空间声耦合的未知系统，抽头系数被布置在与脉冲响应的平坦延迟部分以外的脉冲响应波形的一部分相对应的自适应滤波器的抽头处，从而达到减小的收敛时间和残差，而不会导致抽头系数和抽头位置的错误，即使接收到高度非稳态信号。抽头控制电路91包括输入信号评估电路170，其评估从延迟元件201至20N接收的输入信号样本，将步长设置为零，并根据评估结果生成用于停止分接头位置控制的信号。

7. 发明授权

US06285768B1 Noise cancelling method and noise cancelling unit 有权
标题翻译：降噪方法和噪声消除单元
公开(公告)号：US06285768B1
公开(公告)日：2001-09-04
申请号：US09324992
申请日：1999-06-02
申请人： Shigeji Ikeda
发明人： Shigeji Ikeda
IPC分类号： H03B2900
CPC分类号： H03H21/0012 , H03H2021/0078
摘要： A signal-to-noise power ratio estimation circuit 22 detects an error signal power of an error signal output from a subtracter 13 and a pseudo noise signal power of a pseudo signal output from an adaptive filter 12 and, based on the detected signal powers, outputs an estimated value SNR1 of a signal-to-noise power ratio. An SNR average circuit 20 calculates an average value SNR4 of the SNR1. A step size output circuit 21 controls the step size of the adaptive filter 12 according to the SNR4 value.
摘要翻译：信号噪声功率比估计电路22检测从减法器13输出的误差信号的误差信号功率和从自适应滤波器12输出的伪信号的伪噪声信号功率，并且基于检测到的信号功率，输出信噪比功率比的估计值SNR1。 SNR平均电路20计算SNR1的平均值SNR4。步长输出电路21根据SNR4值控制自适应滤波器12的步长。

8. 发明授权

US5390364A Least-mean squares adaptive digital filter havings variable size loop bandwidth 失效
标题翻译：最小均方自适应数字滤波器具有可变大小的环路带宽
公开(公告)号：US5390364A
公开(公告)日：1995-02-14
申请号：US970115
申请日：1992-11-02
申请人： Mark A. Webster , James C. Richards
发明人： Mark A. Webster , James C. Richards
IPC分类号： H03H21/00 , H04B15/00 , H03H7/30 , H04B1/10
CPC分类号： H03H21/0012 , H03H2021/007 , H03H2021/0074 , H03H2021/0078
摘要： An adaptive digital filter uses a weight adjustment unit for adjusting the weights of an adaptive digital filter according to one or more input signals to the digital filter and according to an error signal indicative of the difference between the actual and desired outputs of the digital filter. The weight adjustment unit has a first low-pass filter for low-pass filtering a signal indicative of the product of the error signal and the one or more input signals, a squarer for squaring the output of the first low-pass filter, a second low-pass filter for low-pass filtering the output of the squarer to extract the D.C. component thereof, a third low-pass filter for low-pass filtering a signal indicative of the output of the error signal squared to extract the D.C. component thereof, a dividing unit for dividing the output of the second low-pass filter by the output of the third low-pass filter to provide a loop bandwidth, and a weight calculation unit for providing values for one or more weights of the adaptive digital filter according to the previous values of the weights and the value of the loop bandwidth.
摘要翻译：自适应数字滤波器使用权重调整单元，用于根据到数字滤波器的一个或多个输入信号并根据表示数字滤波器的实际输出和期望输出之间的差异的误差信号来调整自适应数字滤波器的权重。权重调整单元具有第一低通滤波器，用于对表示误差信号和一个或多个输入信号的乘积的信号进行低通滤波，用于对第一低通滤波器的输出进行平方的平方器;第二低通滤波器，低通滤波器，用于对平方器的输出进行低通滤波以提取其直流分量;第三低通滤波器，用于对表示误差信号的输出的信号进行低通滤波以提取其DC分量; 分割单元，用于通过第三低通滤波器的输出来分频第二低通滤波器的输出以提供循环带宽;以及权重计算单元，用于根据第一低通滤波器的一个或多个权重来提供根据权重的先前值和循环带宽的值。

9. 发明授权

US09543926B2 Signal processing method and device 有权
标题翻译：信号处理方法及装置
公开(公告)号：US09543926B2
公开(公告)日：2017-01-10
申请号：US12751570
申请日：2010-03-31
申请人： Miki Sato , Akihiko Sugiyama
发明人： Miki Sato , Akihiko Sugiyama
IPC分类号： G10L21/0208 , H03H21/00 , G10L21/0216
CPC分类号： H03H21/0012 , G10L21/0208 , G10L2021/02165 , H03H2021/0078
摘要： A signal processor includes: a first adaptive filter that takes a first signal as input and generates a first pseudo signal; a first subtractor that subtracts the first pseudo signal from a second signal to supply a first differential signal as output; a second adaptive filter that takes the first signal as input to generate a second pseudo signal; a second subtractor that subtracts the second pseudo signal from the second signal to supply a second differential signal as output; a first step size control circuit that generates a first step size used in updating the first adaptive filter in accordance with the relation between the second pseudo signal and the second differential signal; and a second step size control circuit that generates a second step size used in updating the second adaptive filter in accordance with the relation between the first signal and the second signal.
摘要翻译：信号处理器包括：第一自适应滤波器，其将第一信号作为输入并产生第一伪信号; 第一减法器，从第二信号中减去第一伪信号以提供第一差分信号作为输出; 第二自适应滤波器，其将第一信号作为输入产生第二伪信号; 第二减法器，从第二信号中减去第二伪信号，以提供第二差分信号作为输出; 第一步长控制电路，根据第二伪信号与第二差分信号之间的关系产生用于更新第一自适应滤波器的第一步长; 以及第二步长控制电路，其根据第一信号和第二信号之间的关系产生用于更新第二自适应滤波器的第二步长。

10. 发明申请

US20150117658A1 PARTICULAR SIGNAL CANCEL METHOD, PARTICULAR SIGNAL CANCEL DEVICE, ADAPTIVE FILTER COEFFICIENT UPDATE METHOD, ADAPTIVE FILTER COEFFICIENT UPDATE DEVICE, AND COMPUTER PROGRAM 审中-公开
标题翻译：特殊信号取消方法，特殊信号取消装置，自适应滤波器系数更新方法，自适应滤波器系统更新装置和计算机程序
公开(公告)号：US20150117658A1
公开(公告)日：2015-04-30
申请号：US14587276
申请日：2014-12-31
申请人： NEC CORPORATION
发明人： Akihiko SUGIYAMA
IPC分类号： G10K11/16
CPC分类号： G10K11/16 , G10K2210/505 , H03H2021/0078 , H04B3/23 , H04M9/082 , H04R3/02
摘要： By using the adaptive filter, the reference input signal is processed so as to identify a pseudo-signal of a particular signal to be deleted. The pseudo-signal is subtracted from the mixture containing a target signal inputted from a microphone, the particular signal to be deleted, and a noise so as to obtain an error signal. A stationary noise is estimated to obtain a stationary noise estimated value. A non-stationary noise is estimated to obtain a non-stationary noise estimated value. The stationary noise estimated value is mixed with the non-stationary estimated value to obtain a mixed noise estimated value. An update amount is calculated according to a correlation value between the error signal and the reference input signal, and the mixed noise estimated value. According to the update amount, a coefficient of the adaptive filter is updated.
摘要翻译：通过使用自适应滤波器，处理参考输入信号，以便识别要删除的特定信号的伪信号。从包含从麦克风输入的目标信号，要删除的特定信号和噪声的混合中减去伪信号，以获得误差信号。估计静态噪声获得静态噪声估计值。估计非平稳噪声以获得非平稳噪声估计值。将静态噪声估计值与非稳定估计值混合以获得混合噪声估计值。根据误差信号和参考输入信号之间的相关值以及混合噪声估计值来计算更新量。根据更新量，更新自适应滤波器的系数。

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