公开(公告)号：US20130251169A1

公开(公告)日：2013-09-26

申请号：US13990982

申请日：2012-03-29

申请人： Tomoharu Awano ,  Atsuyoshi Yano ,  Bunkei Matsuoka

发明人： Tomoharu Awano ,  Atsuyoshi Yano ,  Bunkei Matsuoka

IPC分类号： G10K11/16

CPC分类号： G10K11/16 ,  H04M9/082 ,  H04R3/02

摘要： An echo canceler includes a signal-to-echo ratio calculating unit 103 and a residual echo suppressing unit 105. The signal-to-echo ratio calculating unit 103 computes a signal-to-echo ratio SE(n) indicating a ratio of an echo component to a received signal x(n) from a first residual signal and a second residual signal. The first residual signal is obtained using a filter coefficient sequence of an update filter 102, which is obtained up to the previous operation. The second residual signal is obtained using an updated filter coefficient sequence that undergoes a coefficient update which is performed, using an arbitrary update step size μ(n), on the filter coefficient sequence of the update filter 102, which is obtained up to the previous operation. The residual echo suppressing unit 105 suppresses the echo component contained in the microphone input signal in accordance with the signal-to-echo ratio the signal-to-echo ratio calculating unit 103 computes.

摘要翻译： 回波消除器包括信号回波比计算单元103和残留回波抑制单元105.信号与回波比计算单元103计算指示回波比的信号回波比SE（n） 分量到来自第一残差信号和第二残差信号的接收信号x（n）。 使用更新过滤器102的滤波器系数序列获得第一残差信号，该序列是直到先前的操作获得的。 使用更新的滤波器系数序列获得第二残差信号，该更新的滤波器系数序列使用任意更新步长mu（n）对更新过滤器102的滤波器系数序列执行的系数更新，该更新滤波器系数序列直到先前 操作。 残留回波抑制单元105根据信号与回波比计算单元103计算的信号与回波比，抑制麦克风输入信号中包含的回波分量。

公开(公告)号：US20140286498A1

公开(公告)日：2014-09-25

申请号：US14361835

申请日：2012-04-25

申请人： Takashi Sudo ,  Atsuyoshi Yano ,  Tomoharu Awano

发明人： Takashi Sudo ,  Atsuyoshi Yano ,  Tomoharu Awano

IPC分类号： H04R3/00

CPC分类号： H04R3/002 ,  H04M9/082

摘要： An echo cancelling device splits a low-band signal through LPFs having characteristics which do not cause aliasing during downsampling of downsamplers, and splits a high-band signal through HPFs having characteristics which do not cause aliasing during downsampling of downsamplers. The echo canceling device generates a mid-band signal by subtracting the low-band signal and the high-band signal from a pre-split signal by adder-subtractors, and cancels an echo on a band-by-band basis.

摘要翻译： 回波消除装置通过具有在下采样器的下采样期间不引起混叠的特性的LPF分离低频带信号，并且通过具有在下采样器的下采样中不引起混叠的特征的HPF分离高频带信号。 回波消除装置通过减法器从预分割信号中减去低频带信号和高频带信号来产生中频信号，并逐个取消回波。

公开(公告)号：US09286881B2

公开(公告)日：2016-03-15

申请号：US13990982

申请日：2012-03-29

申请人： Tomoharu Awano ,  Atsuyoshi Yano ,  Bunkei Matsuoka

发明人： Tomoharu Awano ,  Atsuyoshi Yano ,  Bunkei Matsuoka

IPC分类号： H04M9/08 ,  G10K11/16 ,  H04R3/02

CPC分类号： G10K11/16 ,  H04M9/082 ,  H04R3/02

摘要： An echo canceler includes a signal-to-echo ratio calculating unit 103 and a residual echo suppressing unit 105. The signal-to-echo ratio calculating unit 103 computes a signal-to-echo ratio SE(n) indicating a ratio of an echo component to a received signal x(n) from a first residual signal and a second residual signal. The first residual signal is obtained using a filter coefficient sequence of an update filter 102, which is obtained up to the previous operation. The second residual signal is obtained using an updated filter coefficient sequence that undergoes a coefficient update which is performed, using an arbitrary update step size μ(n), on the filter coefficient sequence of the update filter 102, which is obtained up to the previous operation. The residual echo suppressing unit 105 suppresses the echo component contained in the microphone input signal in accordance with the signal-to-echo ratio the signal-to-echo ratio calculating unit 103 computes.

摘要翻译： 回波消除器包括信号回波比计算单元103和残留回波抑制单元105.信号与回波比计算单元103计算指示回波比的信号回波比SE（n） 分量到来自第一残差信号和第二残差信号的接收信号x（n）。 使用更新过滤器102的滤波器系数序列获得第一残差信号，该序列是直到先前的操作获得的。 使用更新的滤波器系数序列获得第二残差信号，该更新的滤波器系数序列使用任意更新步长μ（n）对更新过滤器102的滤波器系数序列执行的系数更新，该更新滤波器系数序列直到先前 操作。 残留回波抑制单元105根据信号与回波比计算单元103计算的信号与回波比，抑制麦克风输入信号中包含的回波分量。

公开(公告)号：US20130315408A1

公开(公告)日：2013-11-28

申请号：US13984136

申请日：2012-03-29

申请人： Atsuyoshi Yano ,  Tomoharu Awano

发明人： Atsuyoshi Yano ,  Tomoharu Awano

IPC分类号： G10K11/175

CPC分类号： G10K11/175 ,  G10K11/178 ,  H03G5/165 ,  H04B3/235 ,  H04R3/02

摘要： A variable update step size is determined in proportion to a magnitude ratio or magnitude difference between a first residual signal and a second residual signal. The first residual signal is obtained by using adaptive filter coefficient sequence, where the adaptive filter coefficient sequence has been obtained in previous operations of the adaptive equalizer. The second residual signal is obtained by using a prior update adaptive filter coefficient sequence, where the prior update adaptive filter coefficient sequence is obtained by performing a coefficient update with an arbitrary prior update step size on the adaptive filter coefficient sequence having been obtained in previous operations of the adaptive equalizer.

摘要翻译： 与第一残差信号和第二残差信号之间的幅度比或幅度差成比例地确定可变更新步长。 通过使用自适应滤波器系数序列获得第一残差信号，其中自适应滤波器系数序列已经在自适应均衡器的先前操作中获得。 通过使用先前更新自适应滤波器系数序列获得第二残差信号，其中先前更新自适应滤波器系数序列是通过在先前操作中获得的自适应滤波器系数序列上执行具有任意先前更新步长的系数更新而获得的 的自适应均衡器。

公开(公告)号：US09830900B2

公开(公告)日：2017-11-28

申请号：US13984136

申请日：2012-03-29

申请人： Atsuyoshi Yano ,  Tomoharu Awano

发明人： Atsuyoshi Yano ,  Tomoharu Awano

IPC分类号： H03G5/16 ,  H04B3/23 ,  H04R3/02 ,  G10K11/175 ,  G10K11/178 ,  H04M9/08 ,  H03H21/00

CPC分类号： G10K11/175 ,  G10K11/178 ,  H03G5/165 ,  H04B3/235 ,  H04R3/02

摘要： A variable update step size is determined in proportion to a magnitude ratio or magnitude difference between a first residual signal and a second residual signal. The first residual signal is obtained by using adaptive filter coefficient sequence, where the adaptive filter coefficient sequence has been obtained in previous operations of the adaptive equalizer. The second residual signal is obtained by using a prior update adaptive filter coefficient sequence, where the prior update adaptive filter coefficient sequence is obtained by performing a coefficient update with an arbitrary prior update step size on the adaptive filter coefficient sequence having been obtained in previous operations of the adaptive equalizer.

公开(公告)号：US09210502B2

公开(公告)日：2015-12-08

申请号：US14361835

申请日：2012-04-25

申请人： Takashi Sudo ,  Atsuyoshi Yano ,  Tomoharu Awano

发明人： Takashi Sudo ,  Atsuyoshi Yano ,  Tomoharu Awano

IPC分类号： H04B3/20 ,  H04R3/00 ,  H04M9/08

CPC分类号： H04R3/002 ,  H04M9/082

摘要： An echo cancelling device splits a low-band signal through LPFs having characteristics which do not cause aliasing during downsampling of downsamplers, and splits a high-band signal through HPFs having characteristics which do not cause aliasing during downsampling of downsamplers. The echo canceling device generates a mid-band signal by subtracting the low-band signal and the high-band signal from a pre-split signal by adder-subtractors, and cancels an echo on a band-by-band basis.

摘要翻译： 回波消除装置通过具有在下采样器的下采样期间不引起混叠的特性的LPF分离低频带信号，并且通过具有在下采样器的下采样中不引起混叠的特征的HPF分离高频带信号。 回波消除装置通过减法器从预分割信号中减去低频带信号和高频带信号来产生中频信号，并逐个取消回波。

公开(公告)号：US20060182290A1

公开(公告)日：2006-08-17

申请号：US10549752

申请日：2004-05-14

申请人： Atsuyoshi Yano

发明人： Atsuyoshi Yano

IPC分类号： H03G5/00 ,  H03G5/06

CPC分类号： H03H17/0213

摘要： A tone control apparatus is provided with a desired filter response input unit 11 for inputting a desired filter response into the tone control apparatus, a spectrum calculating unit 12 for calculating a Fourier spectrum for the set filter response which is inputted by the desired filter response input unit 11, a spectrum smoothing processing unit 13 for performing smoothing processing on the Fourier spectrum calculated by the spectrum calculating unit 12, a cepstrum calculating unit 14 for converting the Fourier spectrum smoothed by spectrum smoothing processing unit 13 into a cepstrum, and an LMA filter 15 to which the cepstrum calculated by the cepstrum calculating unit 14 is set as the filter factor of the LMA filter. The tone control apparatus also has an input terminal 16 for inputting a sound signal into the LMA filter 15, and an output terminal 17 for outputting a sound signal.

摘要翻译： 音调控制装置设置有用于将期望的滤波响应输入到音调控制装置中的期望的滤波器响应输入单元11，用于计算由所需滤波器响应输入输入的设定滤波器响应的傅立叶频谱的频谱计算单元12 单元11，用于对由频谱计算单元12计算的傅立叶频谱执行平滑处理的频谱平滑处理单元13，用于将由频谱平滑处理单元13平滑的傅立叶频谱转换为倒频谱的倒谱计算单元14和LMA滤波器 15，由倒谱计算单元14计算的倒谱被设置为LMA滤波器的滤波器因子。 音调控制装置还具有用于将声音信号输入到LMA滤波器15中的输入端子16和用于输出声音信号的输出端子17。

公开(公告)号：US20140064514A1

公开(公告)日：2014-03-06

申请号：US13992055

申请日：2011-05-24

申请人： Takashi Mikami ,  Atsuyoshi Yano

发明人： Takashi Mikami ,  Atsuyoshi Yano

IPC分类号： H04R3/00

CPC分类号： H04R3/005 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02166

摘要： A target sound enhancement device 10 has a first beamformer 16 and a second beamformer 17 which are of different types. A vehicle interior environment model in which this target sound enhancement device 10 is mounted is stored in a vehicle interior environment model storage unit 13. A beamformer type determining unit 14 selects a most suitable beamformer according to the vehicle interior environment model for each of predetermined frequency bands, and a BF selector 15 outputs a signal in each frequency band to the beamformer selected. A signal combining unit 18 combines signals in the frequency bands in each of which the driver's voice outputted from the first beamformer 16 or the second beamformer 17 is enhanced.

摘要翻译： 目标声音增强装置10具有不同类型的第一波束形成器16和第二波束形成器17。 其中安装有该目标声音增强装置10的车辆内部环境模型被存储在车辆内部环境模型存储单元13中。波束形成器类型确定单元14根据车辆内部环境模型为每个预定频率选择最合适的波束形成器 频带，BF选择器15将每个频带中的信号输出到所选择的波束形成器。 信号组合单元18组合从第一波束形成器16或第二波束形成器17输出的驱动器声音的频带中的信号被增强。

公开(公告)号：US20150269924A1

公开(公告)日：2015-09-24

申请号：US14434150

申请日：2012-11-05

申请人： Atsuyoshi Yano

发明人： Atsuyoshi Yano

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K2210/1282 ,  G10K2210/3028

摘要： A first control signal filter to which a cosine wave oscillating at a control frequency is input; a second control signal filter to which a sine wave oscillating at the control frequency is input; a control signal adder for outputting a control signal generated by adding an output of the first control signal filter and an output of the second control signal filter; a filter coefficient update unit for updating filter coefficients of the first control signal filter and the second control signal filter; and a frequency correction value calculation unit for calculating a frequency correction value for correcting the control frequency on the basis of the control signal and the control frequency.

摘要翻译： 输入以控制频率振荡的余弦波的第一控制信号滤波器; 输入以控制频率振荡的正弦波的第二控制信号滤波器; 控制信号加法器，用于输出通过将第一控制信号滤波器的输出和第二控制信号滤波器的输出相加而产生的控制信号; 滤波器系数更新单元，用于更新第一控制信号滤波器和第二控制信号滤波器的滤波器系数; 以及频率校正值计算单元，用于基于控制信号和控制频率计算用于校正控制频率的频率校正值。

公开(公告)号：US20110135105A1

公开(公告)日：2011-06-09

申请号：US13058212

申请日：2008-09-24

申请人： Atsuyoshi Yano

发明人： Atsuyoshi Yano

IPC分类号： H04B3/20

CPC分类号： H04M9/082 ,  H04B3/235

摘要： An adaptive filter unit 103 outputs a send-mid signal obtained by eliminating echo from a send-in signal, and a power comparing unit 107 calculates a power ratio between received signal power and send-mid signal power. When a receiver ST detecting unit 104 detects a single talk state at a receiving side, an acoustic coupling amount estimating unit 108 estimates and updates the estimated amount of acoustic coupling from the power ratio. A residual echo power estimating unit 109 estimates estimated residual echo power from the received signal power and the estimated amount of acoustic coupling, and a signal-to-echo ratio estimating unit 110 estimates a ratio between the send-mid signal power and the estimated residual echo power. An amplitude suppression coefficient determining unit 111 determines the amplitude suppression coefficient corresponding to the ratio, and an amplitude suppression unit 112 amplitude suppresses the send-mid signal.

摘要翻译： 自适应滤波器单元103输出通过从发送信号消除回波而获得的发送中间信号，功率比较单元107计算接收信号功率和发送中间信号功率之间的功率比。 当接收机ST检测单元104在接收侧检测到单个通话状态时，声耦合量估计单元108从功率比估计和更新估计的声耦合量。 残余回波功率估计单元109根据接收信号功率和估计的声耦合量来估计估计的残余回波功率，并且信号与回波比率估计单元110估计发送中间信号功率与估计残差之间的比率 回波功率。 幅度抑制系数确定单元111确定对应于该比率的振幅抑制系数，振幅抑制单元112的振幅抑制发送中间信号。