公开(公告)号：US08271277B2

公开(公告)日：2012-09-18

申请号：US12280101

申请日：2007-03-05

申请人： Keisuke Kinoshita ,  Tomohiro Nakatani ,  Masato Miyoshi

发明人： Keisuke Kinoshita ,  Tomohiro Nakatani ,  Masato Miyoshi

IPC分类号： G10L21/02 ,  H04B3/20

CPC分类号： H04N7/147 ,  G10L2021/02082 ,  H04R3/04 ,  H04S7/305

摘要： A model application unit calculates linear prediction coefficients of a multi-step linear prediction model by using discrete acoustic signals. Then, a late reverberation predictor calculates linear prediction values obtained by substituting the linear prediction coefficients and the discrete acoustic signals into linear prediction term of the multi-step linear prediction model, as predicted late reverberations. Next, a frequency domain converter converts the discrete acoustic signals to discrete acoustic signals in the frequency domain and also converts the predicted late reverberations to predicted late reverberations in the frequency domain. A late reverberation eliminator calculates relative values between the amplitude spectra of the discrete acoustic signals expressed in the frequency domain and the amplitude spectra of the predicted late reverberations expressed in the frequency domain, and provides the relative values as predicted amplitude spectra of a dereverberation signal.

摘要翻译： 模型应用单元通过使用离散声信号来计算多步线性预测模型的线性预测系数。 然后，后期混响预测器计算通过将线性预测系数和离散声信号代入多阶线性预测模型的线性预测项而获得的线性预测值，如预测的后期混响。 接下来，频域转换器将离散声学信号转换成频域中的离散声学信号，并将预测的后期混响转换为频域中预测的后期混响。 后期的混响消除器计算在频域中表示的离散声信号的幅度谱与在频域中表示的预测后期混响的幅度谱之间的相对值，并将相对值作为混响前信号的预测振幅谱提供。

公开(公告)号：US20110002473A1

公开(公告)日：2011-01-06

申请号：US12919694

申请日：2009-02-27

申请人： Tomohiro Nakatani ,  Takuya Yoshioka ,  Keisuke Kinoshita ,  Masato Miyoshi

发明人： Tomohiro Nakatani ,  Takuya Yoshioka ,  Keisuke Kinoshita ,  Masato Miyoshi

IPC分类号： H04B3/20

CPC分类号： G10L2021/02082

摘要： A sound source model storage section stores a sound source model that represents an audio signal emitted from a sound source in the form of a probability density function. An observation signal, which is obtained by collecting the audio signal, is converted into a plurality of frequency-specific observation signals each corresponding to one of a plurality of frequency bands. Then, a dereverberation filter corresponding to each frequency band is estimated by using the frequency-specific observation signal for the frequency band on the basis of the sound source model and a reverberation model that represents a relationship for each frequency band among the audio signal, the observation signal and the dereverberation filter. A frequency-specific target signal corresponding to each frequency band is determined by applying the dereverberation filter for the frequency band to the frequency-specific observation signal for the frequency band, and the resulting frequency-specific target signals are integrated.

摘要翻译： 声源模型存储部存储以概率密度函数的形式表示从声源发出的音频信号的声源模型。 通过收集音频信号而获得的观测信号被转换为多个频率特定的观测信号，每个频率特定的观测信号对应于多个频带之一。 然后，通过使用基于声源模型的频带的频率特定观察信号和表示音频信号中的每个频带的关系的混响模型来估计与每个频带相对应的混响滤波器， 观察信号和混响滤波器。 通过对频带应用频带的混响除复用滤波器来确定对应于每个频带的频率特定目标信号，并将所得到的频率特定目标信号进行积分。

公开(公告)号：US20090248403A1

公开(公告)日：2009-10-01

申请号：US12280101

申请日：2007-03-05

申请人： Keisuke Kinoshita ,  Tomohiro Nakatani ,  Masato Miyoshi

发明人： Keisuke Kinoshita ,  Tomohiro Nakatani ,  Masato Miyoshi

IPC分类号： G10L19/00

CPC分类号： H04N7/147 ,  G10L2021/02082 ,  H04R3/04 ,  H04S7/305

摘要： A model application unit calculates linear prediction coefficients of a multi-step linear prediction model by using discrete acoustic signals. Then, a late reverberation predictor calculates linear prediction values obtained by substituting the linear prediction coefficients and the discrete acoustic signals into linear prediction term of the multi-step linear prediction model, as predicted late reverberations. Next, a frequency domain converter converts the discrete acoustic signals to discrete acoustic signals in the frequency domain and also converts the predicted late reverberations to predicted late reverberations in the frequency domain. A late reverberation eliminator calculates relative values between the amplitude spectra of the discrete acoustic signals expressed in the frequency domain and the amplitude spectra of the predicted late reverberations expressed in the frequency domain, and provides the relative values as predicted amplitude spectra of a dereverberation signal.

摘要翻译： 模型应用单元通过使用离散声信号来计算多步线性预测模型的线性预测系数。 然后，后期混响预测器计算通过将线性预测系数和离散声信号代入多阶线性预测模型的线性预测项而获得的线性预测值，如预测的后期混响。 接下来，频域转换器将离散声学信号转换成频域中的离散声学信号，并将预测的后期混响转换为频域中预测的后期混响。 后期的混响消除器计算在频域中表示的离散声信号的幅度谱与在频域中表示的预测后期混响的幅度谱之间的相对值，并将相对值作为混响前信号的预测振幅谱提供。

公开(公告)号：US08467538B2

公开(公告)日：2013-06-18

申请号：US12919694

申请日：2009-02-27

申请人： Tomohiro Nakatani ,  Takuya Yoshioka ,  Keisuke Kinoshita ,  Masato Miyoshi

发明人： Tomohiro Nakatani ,  Takuya Yoshioka ,  Keisuke Kinoshita ,  Masato Miyoshi

IPC分类号： H04B3/20

CPC分类号： G10L2021/02082

摘要： A sound source model storage section stores a sound source model that represents an audio signal emitted from a sound source in the form of a probability density function. An observation signal, which is obtained by collecting the audio signal, is converted into a plurality of frequency-specific observation signals each corresponding to one of a plurality of frequency bands. Then, a dereverberation filter corresponding to each frequency band is estimated by using the frequency-specific observation signal for the frequency band on the basis of the sound source model and a reverberation model that represents a relationship for each frequency band among the audio signal, the observation signal and the dereverberation filter. A frequency-specific target signal corresponding to each frequency band is determined by applying the dereverberation filter for the frequency band to the frequency-specific observation signal for the frequency band, and the resulting frequency-specific target signals are integrated.

摘要翻译： 声源模型存储部存储以概率密度函数的形式表示从声源发出的音频信号的声源模型。 通过收集音频信号而获得的观测信号被转换为多个频率特定的观测信号，每个频率特定的观测信号对应于多个频带之一。 然后，通过使用基于声源模型的频带的频率特定观察信号和表示音频信号中的每个频带的关系的混响模型来估计与每个频带相对应的混响滤波器， 观察信号和混响滤波器。 通过对频带应用频带的混响除复用滤波器来确定对应于每个频带的频率特定目标信号，并将所得到的频率特定目标信号进行积分。

公开(公告)号：US08848933B2

公开(公告)日：2014-09-30

申请号：US12920222

申请日：2009-03-05

申请人： Takuya Yoshioka ,  Tomohiro Nakatani ,  Masato Miyoshi

发明人： Takuya Yoshioka ,  Tomohiro Nakatani ,  Masato Miyoshi

IPC分类号： H04B3/20

CPC分类号： G10L2021/02082

摘要： The initial values of parameter estimates are set, including reverberation parameter estimates, which includes a regression coefficient used in a linear convolutional operation for calculating an estimated value of reverberation included in an observed signal, source parameter estimates, which includes estimated values of a linear prediction coefficient and a prediction residual power that identify the power spectrum of a source signal, and noise parameter estimates, which include noise power spectrum estimates. Then, the maximum likelihood estimation is used to alternately repeat processing for updating at least one of the reverberation parameter estimates and the noise parameter estimates and processing for updating the source parameter estimates until a predetermined termination condition is satisfied.

摘要翻译： 设置参数估计的初始值，包括混响参数估计，其包括在线性卷积运算中使用的回归系数，用于计算包括在观察信号中的混响的估计值，源参数估计，其包括线性预测的估计值 系数和识别源信号的功率谱的预测剩余功率，以及包括噪声功率谱估计的噪声参数估计。 然后，使用最大似然估计来交替地重复用于更新混响参数估计和噪声参数估计中的至少一个的处理，以及用于更新源参数估计的处理，直到满足预定的终止条件。

公开(公告)号：US20110044462A1

公开(公告)日：2011-02-24

申请号：US12920222

申请日：2009-03-05

申请人： Takuya Yoshioka ,  Tomohiro Nakatani ,  Masato Miyoshi

发明人： Takuya Yoshioka ,  Tomohiro Nakatani ,  Masato Miyoshi

IPC分类号： H04B3/20

CPC分类号： G10L2021/02082

摘要： The initial values of parameter estimates are set, including reverberation parameter estimates, which includes a regression coefficient used in a linear convolutional operation for calculating an estimated value of reverberation included in an observed signal, source parameter estimates, which includes estimated values of a linear prediction coefficient and a prediction residual power that identify the power spectrum of a source signal, and noise parameter estimates, which include noise power spectrum estimates. Then, the maximum likelihood estimation is used to alternately repeat processing for updating at least one of the reverberation parameter estimates and the noise parameter estimates and processing for updating the source parameter estimates until a predetermined termination condition is satisfied.

摘要翻译： 设置参数估计的初始值，包括混响参数估计，其包括在线性卷积运算中使用的回归系数，用于计算包括在观察信号中的混响的估计值，源参数估计，其包括线性预测的估计值 系数和识别源信号的功率谱的预测剩余功率，以及包括噪声功率谱估计的噪声参数估计。 然后，使用最大似然估计来交替地重复用于更新混响参数估计和噪声参数估计中的至少一个的处理，以及用于更新源参数估计的处理，直到满足预定的终止条件。

公开(公告)号：US4683590A

公开(公告)日：1987-07-28

申请号：US839677

申请日：1986-03-14

申请人： Masato Miyoshi ,  Yutaka Kaneda ,  Juro Ohga

发明人： Masato Miyoshi ,  Yutaka Kaneda ,  Juro Ohga

IPC分类号： H03H21/00 ,  H04R3/04 ,  H04B15/00 ,  G10K11/16 ,  G11B3/00

CPC分类号： H03H21/0012 ,  H04S7/301 ,  H04R3/04

摘要： An inverse control system is disclosed, which comprises FIR filters provided between transmitting elements at n (n=2, 3, . . . ) input points of a linear FIR system and a common signal source, for an inverse control such as to provide desired impulse responses between the signal source and m (n>m) output points of the linear FIR system. A j-th (j=1, 2, . . . , n) one of the FIR filters has a number L.sub.j of taps which satisfies the relationships represented by ##EQU1## for all i=1, 2, . . . , m and j=1, 2 . . . , n where w.sub.ij is the number of discrete signals representing the impulse response g.sub.ij (k) between the j-th output point and i-output point and P.sub.i is the number of discrete signals representing the desired impulse response r.sub.i (k) between the signal source and i-th output point. The j-th FIR filters has a filter coefficient h.sub.j (k) satisfying the relationship ##EQU2## where .circle.* is a discrete convolution.

摘要翻译： 公开了一种逆控制系统，其包括在线性FIR系统的n（n = 2,3，...）个输入点的发射元件和公共信号源之间提供的FIR滤波器，用于逆控制，以提供期望的 线性FIR系统的信号源和m（n> m）输出点之间的脉冲响应。 第j个（j = 1,2，...，n）个FIR滤波器之一具有数目Lj的抽头，其满足关于所有i = 1的所示关系，由 wij + Lj-1> / = 1，2，... 。 。 ，m和j = 1,2。 。 。 ，n其中wij是表示第j个输出点和i输出点之间的脉冲响应gij（k）的离散信号的数量，Pi是表示信号之间的期望脉冲响应ri（k）的离散信号的数量 源和第i个输出点。 第j个FIR滤波器具有满足关系的滤波器系数hj（k），其中＆cir＆*是离散卷积。

公开(公告)号：US08494845B2

公开(公告)日：2013-07-23

申请号：US11913241

申请日：2007-02-16

申请人： Takuya Yoshioka ,  Takafumi Hikichi ,  Masato Miyoshi

发明人： Takuya Yoshioka ,  Takafumi Hikichi ,  Masato Miyoshi

IPC分类号： G10L21/02 ,  G10L19/14 ,  G10L19/02 ,  G10L15/20 ,  G10L13/00

CPC分类号： G10L2021/02082

摘要： Provided is a signal distortion elimination apparatus comprising: an inverse filter application means that outputs the signal obtained by applying an inverse filter to an observed signal as a restored signal when a predetermined iteration termination condition is met and outputs the signal obtained by applying the inverse filter to the observed signal as an ad-hoc signal when the predetermined iteration termination condition is not met; a prediction error filter calculation means that segments the ad-hoc signal into frames and outputs a prediction error filter of each frame obtained by performing linear prediction analysis of the ad-hoc signal of each frame; an inverse filter calculation means that calculates an inverse filter such that a concatenation of innovation estimates of the respective frames becomes mutually independent among their samples, where the innovation estimate of a single frame (an innovation estimate) is the signal obtained by applying the prediction error filter of the corresponding frame to the ad-hoc signal of the corresponding frame, and outputs the inverse filter; and a control means that iteratively executes the inverse filter application means, the prediction error filter calculation means and the inverse filter calculation means until the iteration termination condition is met.

摘要翻译： 提供了一种信号失真消除装置，包括：逆滤波器应用装置，当满足预定的迭代终止条件时，将通过对观测信号应用反相滤波器获得的信号作为恢复信号输出，并输出通过应用逆滤波器获得的信号 当不满足预定的迭代终止条件时，将观测信号作为ad-hoc信号; 预测误差滤波器计算装置，将所述自组织信号分割为帧，并输出通过对每帧的自组织信号进行线性预测分析获得的每帧的预测误差滤波器; 反向滤波器计算意味着计算逆滤波器，使得各帧的创新估计的级联在其样本之间变得相互独立，其中单个帧（创新估计）的创新估计是通过应用预测误差获得的信号 对相应帧的ad-hoc信号进行相应帧的滤波，并输出逆滤波器; 以及在满足迭代终止条件之前，迭代地执行逆滤波器应用装置，预测误差滤波器计算装置和逆滤波器计算装置的控制装置。

公开(公告)号：US06785391B1

公开(公告)日：2004-08-31

申请号：US09316358

申请日：1999-05-21

申请人： Satoru Emura ,  Masato Miyoshi

发明人： Satoru Emura ,  Masato Miyoshi

IPC分类号： H03G300

CPC分类号： H04S7/301

摘要： N correlated signals are processed by N pre-filters whose transfer characteristics have different zero points, then the processed signals are input into an N-input M-output linear FIR system, and its transfer characteristics are estimated from its response outputs and the processed signals from the pre-filters.

摘要翻译： N个相关信号由传输特性具有不同零点的N个预滤波器处理，然后处理的信号被输入到N输入M输出线性FIR系统中，并且其传输特性根据其响应输出和处理信号 从预过滤器。

公开(公告)号：US20080189103A1

公开(公告)日：2008-08-07

申请号：US11913241

申请日：2007-02-16

申请人： Takuya Yoshioda ,  Takafumi Hikichi ,  Masato Miyoshi

发明人： Takuya Yoshioda ,  Takafumi Hikichi ,  Masato Miyoshi

IPC分类号： G10L21/02

CPC分类号： G10L2021/02082

摘要： Provided is a signal distortion elimination apparatus comprising: an inverse filter application means that outputs the signal obtained by applying an inverse filter to an observed signal as a restored signal when a predetermined iteration termination condition is met and outputs the signal obtained by applying the inverse filter to the observed signal as an ad-hoc signal when the predetermined iteration termination condition is not met; a prediction error filter calculation means that segments the ad-hoc signal into frames and outputs a prediction error filter of each frame obtained by performing linear prediction analysis of the ad-hoc signal of each frame; an inverse filter calculation means that calculates an inverse filter such that a concatenation of innovation estimates of the respective frames becomes mutually independent among their samples, where the innovation estimate of a single frame (an innovation estimate) is the signal obtained by applying the prediction error filter of the corresponding frame to the ad-hoc signal of the corresponding frame, and outputs the inverse filter; and a control means that iteratively executes the inverse filter application means, the prediction error filter calculation means and the inverse filter calculation means until the iteration termination condition is met.

摘要翻译： 提供了一种信号失真消除装置，包括：逆滤波器应用装置，当满足预定的迭代终止条件时，将通过对观测信号应用反相滤波器获得的信号作为恢复信号输出，并输出通过应用逆滤波器获得的信号 当不满足预定的迭代终止条件时，将观测信号作为ad-hoc信号; 预测误差滤波器计算装置，将所述自组织信号分割为帧，并输出通过对每帧的自组织信号进行线性预测分析获得的每帧的预测误差滤波器; 反向滤波器计算意味着计算逆滤波器，使得各帧的创新估计的级联在其样本之间变得相互独立，其中单个帧（创新估计）的创新估计是通过应用预测误差获得的信号 对相应帧的ad-hoc信号进行相应帧的滤波，并输出逆滤波器; 以及在满足迭代终止条件之前，迭代地执行逆滤波器应用装置，预测误差滤波器计算装置和逆滤波器计算装置的控制装置。