公开(公告)号：US07647209B2

公开(公告)日：2010-01-12

申请号：US10594983

申请日：2006-02-07

申请人： Hiroshi Sawada ,  Shoko Araki ,  Ryo Mukai ,  Shoji Makino

发明人： Hiroshi Sawada ,  Shoko Araki ,  Ryo Mukai ,  Shoji Makino

IPC分类号： G06F3/00

CPC分类号： G10L21/0272 ,  G06K9/6245 ,  G10L15/20 ,  G10L2021/02165

摘要： A frequency domain transforming section transforms mixed signals observed by multiple sensors into mixed signals in the frequency domain, a complex vector generating section generates a complex vector by using the frequency-domain mixed signals, a normalizing section generates a normalized vector excluding frequency dependence of the complex vector, and a clustering section clusters the normalized vectors to generate clusters. Then, a separated signal generating section generates separated signals in the frequency domain by using information about the clusters and a time domain transforming section transforms the separated signals in the frequency domain into separated signals in the time domain.

摘要翻译： 频域变换部将多个传感器观测到的混合信号变换为频域的混合信号，复矢量生成部通过使用频域混合信号生成复矢量，归一化部生成除了频率依赖性的归一化矢量 复数向量，聚类部分聚类归一化向量以生成聚类。 然后，分离信号生成部通过使用关于簇的信息来生成频域的分离信号，并且时域变换部将频域中的分离信号变换为时域中的分离信号。

公开(公告)号：US20050203981A1

公开(公告)日：2005-09-15

申请号：US10508708

申请日：2004-03-03

申请人： Hiroshi Sawada ,  Ryo Mukai ,  Shoko Araki ,  Shoji Makino

发明人： Hiroshi Sawada ,  Ryo Mukai ,  Shoko Araki ,  Shoji Makino

IPC分类号： G01S3/46 ,  G01S3/74 ,  G01S3/80 ,  G01S3/808 ,  G06F17/10

CPC分类号： G01S3/46 ,  G01S3/74 ,  G01S3/8006 ,  G01S3/808

摘要： Observed signals x1(t) to xj(t) from a plurality of sensors disposed in two dimensions are subject to a short-time Fourier transform, from which signals X1(ω1) to X1(ωN), . . . XJ(ω1) to XJ(ωN) are derived. Using the independent component analysis process, separation matrices W(ω1) to W(ωN) are produced. Their inverse matrices H(ω1) to H(ωN) are calculated, and for each ωn (n=1, . . . , N), using a pair of elements from each column of H(ωn), Hji(ωn) and Hj′i(ωn), an angle {circumflex over (θ)}i,jj′(ωn)=cos−1(arg(|Hji(ωn)/Hj′i(ωn))/(ωnc−1∥dj−dj′∥)) is calculated where arg(α) represents an argument of α, c the propagation velocity of a signal, and ∥dj−dj′∥ represents a spacing between sensors i and j′. Columns are permuted so that {circumflex over (θ)}i,jj′(ωn) obtained from each column of H(ω1) to H(ωN) assume an ascending order. For columns which cannot be permuted, the equation ∥qi−dj′∥/∥qi−dj∥=|Hji(ωn)/Hj′i(ωn)|=DRi,jj′(ωn) is solved for qi to calculate Ri,jj′(ωn)=∥DRi,jj′(ωn)·(dj−dj′)/(DR2i,jj′(ωn)−1)|. Columns of H(ωn) is permuted so that Ri,jj′(ωn) assume an ascending order. H(ωn) is used to solve the permutation problem of W(ω).

公开(公告)号：US07039546B2

公开(公告)日：2006-05-02

申请号：US10508708

申请日：2004-03-03

申请人： Hiroshi Sawada ,  Ryo Mukai ,  Shoko Araki ,  Shoji Makino

发明人： Hiroshi Sawada ,  Ryo Mukai ,  Shoko Araki ,  Shoji Makino

IPC分类号： G01C9/00

CPC分类号： G01S3/46 ,  G01S3/74 ,  G01S3/8006 ,  G01S3/808

摘要： Signals from a plurality of sources are observed by a plurality of sensors disposed in two dimensions, and the observed signals are subject to a short-time Fourier transform, from which frequency domain signals are derived. Using the independent component analysis process on the frequency domain signals, separation matrices are produced, and an inverse matrix of each separation matrix is calculated. The direction of each source is calculated based on a ratio of a pair of elements in each column of the inverse matrix.

摘要翻译： 来自多个源的信号由设置在二维上的多个传感器观察，并且所观测的信号经受​​短时傅里叶变换，从其导出频域信号。 对频域信号采用独立分量分析过程，产生分离矩阵，并计算每个分离矩阵的逆矩阵。 每个源的方向基于逆矩阵的每列中的一对元素的比率来计算。

公开(公告)号：US20060058983A1

公开(公告)日：2006-03-16

申请号：US10539609

申请日：2004-09-01

申请人： Shoko Araki ,  Hiroshi Sawada ,  Shoji Makino ,  Ryo Mukai

发明人： Shoko Araki ,  Hiroshi Sawada ,  Shoji Makino ,  Ryo Mukai

IPC分类号： G06F15/00 ,  H03F1/26 ,  H04B15/00

CPC分类号： G10L21/0272 ,  G06K9/6245

摘要： This invention achieves high-quality separation of mixed signals in situations where the relationship between the number of signal sources N and the number of sensors M is such that N>M. First, the values of the observed signal observed by M sensors are transformed into frequency domain values, and these frequency domain values are used to calculate the relative values of the observed values between the sensors at each frequency. These relative values are clustered into N clusters, and the representative value of each cluster is calculated. Then, using these representative values, a mask is produced to extract the values of the signals emitted by V (1≦V≦M) signal sources from the frequency-domain signal values, and this mask is used to extract the signal values emitted by V signal sources from these frequency-domain signal values. After that, if V=1 then the limited signal is output directly as a separated signal, while if V≧2 then the separated values are obtained from this limited signal by subjecting it to separation techniques such as ICA.

摘要翻译： 本发明在信号源数目N与传感器数量M之间的关系为N> M的情况下实现混合信号的高质量分离。 首先，由M个传感器观察到的观测信号的值被变换为频域值，并且这些频域值用于计算每个频率下传感器之间的观测值的相对值。 将这些相对值聚类为N个簇，并计算每个簇的代表值。 然后，使用这些代表值，产生掩模以从频域信号值中提取由V（1 <= V <= M）个信号源发射的信号的值，并且该掩码用于提取信号值 由V信号源从这些频域信号值发射。 之后，如果V = 1，则限制信号直接作为分离信号输出，而如果V> = 2，则通过对分离技术（如ICA）进行分离，从该有限信号获得分离值。

公开(公告)号：US07496482B2

公开(公告)日：2009-02-24

申请号：US10539609

申请日：2004-09-01

申请人： Shoko Araki ,  Hiroshi Sawada ,  Shoji Makino ,  Ryo Mukai

发明人： Shoko Araki ,  Hiroshi Sawada ,  Shoji Makino ,  Ryo Mukai

IPC分类号： G06F15/00

CPC分类号： G10L21/0272 ,  G06K9/6245

摘要： A method and a device for signal separation. First, values of signals observed by M sensors are transformed into frequency domain values, and these frequency domain values are used to calculate relative values of the observed values between the sensors at each frequency. These relative values are clustered into N clusters, and the representative value of each cluster is calculated. Then, using these representative values, a mask is produced to extract the values of the signals emitted by V (1≦V≦M) signal sources from the frequency-domain signal values, and this mask is applied to the frequency-domain signal values. After that, if V=1 then the limited signal is output directly as a separated signal, while if V≧2 then the separated values are obtained by separating this limited signal with separation techniques such as ICA.

摘要翻译： 一种用于信号分离的方法和装置。 首先，将M个传感器观察到的信号值变换为频域值，并使用这些频域值来计算每个频率下传感器之间的观测值的相对值。 将这些相对值聚类为N个簇，并计算每个簇的代表值。 然后，使用这些代表值，产生掩模，以从频域信号值中提取由V（1 <= V <= M）个信号源发射的信号的值，并将该掩码应用于频域 信号值。 之后，如果V = 1，则限制信号作为分离信号直接输出，而如果V> = 2，则通过用ICA等分离技术分离该限制信号来获得分离的值。

公开(公告)号：US20080215651A1

公开(公告)日：2008-09-04

申请号：US10594983

申请日：2006-02-07

申请人： Hiroshi Sawada ,  Shoko Araki ,  Ryo Mukai ,  Shoji Makino

发明人： Hiroshi Sawada ,  Shoko Araki ,  Ryo Mukai ,  Shoji Makino

IPC分类号： G06F17/14

CPC分类号： G10L21/0272 ,  G06K9/6245 ,  G10L15/20 ,  G10L2021/02165

摘要： A frequency domain transforming section 2 transforms mixed signals observed by multiple sensors into mixed signals in the frequency domain, a complex vector generating section 3 generates a complex vector by using the frequency-domain mixed signals, a normalizing section 4 generates a normalized vector excluding frequency dependence of the complex vector, and a clustering section 5 clusters the normalized vectors to generate clusters. Then, a separated signal generating section 6 generates separated signals in the frequency domain by using information about the clusters and a time domain transforming section 7 transforms the separated signals in the frequency domain into separated signals in the time domain.

摘要翻译： 频域变换部2将由多个传感器观测到的混合信号变换为频域的混合信号，复矢量生成部3通过使用频域混合信号生成复矢量，归一化部4生成除频率以外的归一化矢量 复合向量的依赖性，并且聚类部分5聚集归一化向量以生成聚类。 然后，分离信号生成部6通过使用关于簇的信息来生成频域的分离信号，时域变换部7将频域中的分离信号变换为时域中的分离信号。

公开(公告)号：US20060177655A1

公开(公告)日：2006-08-10

申请号：US10561155

申请日：2004-06-18

申请人： Seiji Mizohata ,  Shoji Makino ,  Shigeru Morioka ,  Masao Uchida ,  Bunsow Nagasaka

发明人： Seiji Mizohata ,  Shoji Makino ,  Shigeru Morioka ,  Masao Uchida ,  Bunsow Nagasaka

IPC分类号： D02G3/00

CPC分类号： D01F6/86 ,  Y10T428/2913

摘要： A polyether ester elastic fiber comprising a polyether ester elastomer containing polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment and copolymerized with a specific metal organic sulfonate, having a coefficient of moisture absorption of not less than 5% at 35° C. and at a RH of 95% and a coefficient of water absorption extension of not less than 10%. The above-mentioned polyether ester elastic fiber has a good moisture-absorbing property, and is reversibly largely expanded or contracted by the absorption or release of water. Therefore, a fabric giving excellent comfortableness can be obtained from said elastic fibers, and can be recycled.

摘要翻译： 一种聚醚酯弹性纤维，其包含聚对苯二甲酸丁二醇酯作为硬链段的聚醚酯弹性体，聚氧乙烯二醇作为软链段，并与特定的金属有机磺酸盐共聚，其吸湿系数在35℃下不低于5％ RH为95％，吸水系数为10％以上。 上述聚醚酯弹性纤维具有良好的吸湿性，并且通过水的吸收或释放而可逆地大幅膨胀或收缩。 因此，可以从所述弹性纤维获得具有优异舒适性的织物，并且可以再循环。

公开(公告)号：US5408530A

公开(公告)日：1995-04-18

申请号：US127375

申请日：1993-09-28

申请人： Shoji Makino ,  Yutaka Kaneda

发明人： Shoji Makino ,  Yutaka Kaneda

IPC分类号： H04B3/23 ,  H04M9/08

CPC分类号： H04M9/082

摘要： A received signal vector x(n), a coefficient error covariance matrix P(n) from a memory part 12 and a forgetting factor .nu. from a memory part 13 are provided to a gain calculating part 14 to obtain a gain vector k(n). The thus obtained gain vector k(n) and an error e(n) between an echo and an echo replica are multiplied in a multiplying part 16. The multiplied output and a filter coefficient h(n) from a memory part 18 are added together to update the latter. The thus updated filter coefficient is used as the filter coefficient of an estimated echo path (an FIR filter, for example). The coefficient error covariance matrix P(n), the gain vector k(n), the received signal vector x(n) and the forgetting factor .nu. are provided to an updating part 19 to update the coefficient error covariance matrix P(n), and an adjustment matrix A representing an expectation of an impulse response variation of an echo path is added to the updated coefficient error covariance matrix P(n) and the added value is used as a new coefficient error covariance matrix P(n).

摘要翻译： 接收信号矢量x（n），来自存储器部分12的系数误差协方差矩阵P（n）和来自存储器部分13的遗忘因子nu被提供给增益计算部分14以获得增益矢量k（n） 。 如此获得的增益矢量k（n）和回波和回波复制品之间的误差e（n）在乘法部分16中相乘。将乘法输出和来自存储器部分18的滤波器系数h（n）相加在一起 更新后者。 将这样更新的滤波器系数用作估计回波路径的滤波器系数（例如FIR滤波器）。 将系数误差协方差矩阵P（n），增益矢量k（n），接收信号矢量x（n）和遗忘因子nu提供给更新部分19以更新系数误差协方差矩阵P（n） 并且将表示回波路径的脉冲响应变化的期望的调整矩阵A添加到更新的系数误差协方差矩阵P（n），并且将附加值用作新的系数误差协方差矩阵P（n）。

公开(公告)号：US5272695A

公开(公告)日：1993-12-21

申请号：US756622

申请日：1991-09-09

申请人： Shoji Makino ,  Yoichi Haneda ,  Yutaka Kanesa

发明人： Shoji Makino ,  Yoichi Haneda ,  Yutaka Kanesa

IPC分类号： H03H21/00 ,  H04B3/23 ,  H04M9/08 ,  H04J1/00

CPC分类号： H04M9/082

摘要： A received input signal and an echo signal resulting from the passage of the received input signal through an echo path are both analyzed or divided into a plurality of common subbands. The received input signal in each subband is supplied to an estimated echo path provided in the subband, by which it is rendered into an echo replica signal. The echo replica signal is subtracted, by a subtractor provided in each subband, from the echo signal in the same subband as the echo replica signal to obtain a residual echo signal. The residual echo signals in the respective subbands are synthesized into a full-band residual echo signal. The estimated echo path in each subband is formed by a digital FIR filter and its filter coefficients are calculated by a coefficient calculation part in the subband, based on the received input signal, the residual echo signal and a step size matrix. The filter coefficients are iteratively updated so that the residual echo signal in each subband may be minimized. The step size matrix is used to define the step size of the filter coefficients and is determined by an acoustic field characteristics calculation part, based on the variation characteristics of an impulse response of the echo path in each subband.

摘要翻译： 接收到的输入信号和由接收到的输入信号通过回波路径而产生的回波信号都被分析或分成多个公共子带。 每个子带中的接收到的输入信号被提供给在子带中提供的估计回波路径，由此将其呈现为回波复制信号。 通过在每个子带中提供的减法器从与回波复制信号相同子带中的回波信号中减去回波复制信号，以获得残留回波信号。 各个子带中的残余回波信号被合成为全带残留回波信号。 每个子带中的估计回波路径由数字FIR滤波器形成，并且其滤波器系数由子带中的系数计算部分基于接收到的输入信号，残余回波信号和步长矩阵来计算。 滤波器系数被迭代地更新，使得每个子带中的残余回波信号可以被最小化。 步长矩阵用于定义滤波器系数的步长，并且由声场特性计算部分基于每个子带中的回波路径的脉冲响应的变化特性来确定。

公开(公告)号：US06246760B1

公开(公告)日：2001-06-12

申请号：US08927961

申请日：1997-09-11

申请人： Shoji Makino ,  Suehiro Shimauchi ,  Yoichi Haneda ,  Akira Nakagawa ,  Junji Kojima

发明人： Shoji Makino ,  Suehiro Shimauchi ,  Yoichi Haneda ,  Akira Nakagawa ,  Junji Kojima

IPC分类号： H04M100

CPC分类号： H04M9/082 ,  H04M1/60

摘要： In a subband echo cancellation for a multichannel teleconference, received signals x1(k), x2(k), . . . , xI(k) of each channel are divided into N subband signals, an echo y(k) picked up by a microphone 16j after propagation over an echo path is divided into N subband signals y0(k), . . . ,yN−1(k), and vectors each composed of a time sequence of subband received signals x1(k), . . . , xI(k) are combined for each corresponding subband. The combined vector and an echo cancellation error signal in the corresponding subband are input into an estimation part 19n, wherein a cross-correlation variation component is extracted. The extracted component is used as an adjustment vector to iteratively adjust the impulse response of an estimated echo path. The combined vector is applied to an estimated echo path 18n formed by the adjusted value to obtain an echo replica. An echo cancellation error signal en(k) is calculated from the echo replica and a subband echo yn(k).

摘要翻译： 在多声道电话会议的子带回波消除中，接收信号x1（k），x2（k），... 。 。 ，每个信道的xI（k）被划分为N个子带信号，在通过回波路径传播之后由麦克风16j拾取的回波y（k）被划分为N个子带信号y0（k）。 。 。 ，yN-1（k），以及由子带接收信号x1（k）的时间序列组成的矢量。 。 。 ，对于每个对应的子带组合xI（k）。 将相应子带中的组合矢量和回波消除误差信号输入到估计部分19n中，其中提取互相关变化分量。 提取的分量被用作调整向量以迭代地调整估计回波路径的脉冲响应。 将组合矢量应用于由调整值形成的估计回波路径18n，以获得回波复制品。 从回波复制品和子带回波yn（k）计算回波消除误差信号en（k）。