公开(公告)号：EP1006652A3

公开(公告)日：2002-04-10

申请号：EP99309224.6

申请日：1999-11-19

申请人： SIEMENS CORPORATE RESEARCH, INC.

发明人： Balan, Radu ,  Jourjine, Alexander ,  Rosca, Justinian

IPC分类号： H03H21/00

CPC分类号： G06K9/6243 ,  H03H21/0012 ,  H03H2021/0034

摘要： A system that reconstructs independent signals (voice 1, voice 2) from degenerate mixtures estimates independent Auto Regressive (AR) processes from their sum. The system includes an identification system (20) and an estimator (22). A mixture (X) of two signals is inputted into the system and through the identifying and filtering processes, two estimates of the original signals are outputted. The identification system includes an ARMA identifier, a computation of autocovariance coefficients, an initializer and a gradient descent system. The estimator includes filtering.

公开(公告)号：EP0860944B1

公开(公告)日：2003-07-16

申请号：EP98200391.5

申请日：1998-02-09

申请人： Koninklijke Philips Electronics N.V.

发明人： Deville, Yannick

IPC分类号： H03H21/00

CPC分类号： H03H21/0012 ,  G06K9/624 ,  H03H2021/0034

公开(公告)号：EP1070390A1

公开(公告)日：2001-01-24

申请号：EP99944143.9

申请日：1999-04-08

申请人： Sarnoff Corporation

发明人： PARRA, Lucas ,  SPENCE, Clay, Douglas

IPC分类号： H03H21/00

CPC分类号： H03H21/0029 ,  G06K9/624 ,  H03H21/0012 ,  H03H2021/0034

摘要： A method and apparatus that performs blind source separation usign convolutive signal decorrelation. More specifically, the method accumulates a length of input signal (mixed signal) that comprises a plurality of independent signals from independent signal sources. The invention then divides the length of input signal into a plurality of T-length periods (windows) and performs a discrete Fourier transform (DFT) on the signal whithin each T-length period. Thereafter, estimated cross-correlation values are computed using a plurality of the average DFT values. A total number of K cross-correlation values are computed, where each of the K values is averaged over N of the T-length periods. Using the cross-correlation values, a gradient descent process computes the coefficients of a FIR filter that will effectively separate the source signals within the input signal. To achieve an accurate solution, the gradient descent process is constrained in that the time-domain values of the filter coefficents can attain only certain values, i.e., the time-domain filter coefficient values W(τ) are constrained within each T-length period to be zero for any time t > Q. In this manner, a unique solution for the FIR filter coefficients is computed and a filter produced using these coefficents will effectively separate the source signals.

公开(公告)号：EP0565479A1

公开(公告)日：1993-10-13

申请号：EP93630032.6

申请日：1993-04-07

申请人： RAMOT UNIVERSITY AUTHORITY FOR APPLIED RESEARCH & INDUSTRIAL DEVELOPMENT LTD.

发明人： Weinstein, Ehud ,  Yellin, Daniel

IPC分类号： H03H21/00

CPC分类号： G06K9/6243 ,  H03H21/0029 ,  H03H2021/0034 ,  H04R3/005

摘要： A signal processing system includes a plurality of detectors for detecting signals, each detector receiving signals from plural sources ; and a processor for receiving the detected signals and producing a reconstruction filter for filtering the detected sigals to produce reconstructed source signals in which each source signal is reconstructed without interference from the other source signals. The reconstruction filter is produced such that cross-polyspectra of the reconstructed signals are forced to approach zero.

摘要翻译： 信号处理系统包括用于检测信号的多个检测器，每个检测器接收来自多个信号源的信号; 以及处理器，用于接收所检测的信号并产生用于对所检测的信号进行滤波的重建滤波器，以产生重建的源信号，其中每个源信号被重建而不受其他源信号的干扰。 产生重构滤波器，使得重构信号的交叉多谱线被迫接近零。

公开(公告)号：EP1006652A2

公开(公告)日：2000-06-07

申请号：EP99309224.6

申请日：1999-11-19

申请人： SIEMENS CORPORATE RESEARCH, INC.

发明人： Balan, Radu ,  Jourjine, Alexander ,  Rosca, Justinian

IPC分类号： H03H21/00

CPC分类号： G06K9/6243 ,  H03H21/0012 ,  H03H2021/0034

摘要： A system that reconstructs independent signals (voice 1, voice 2) from degenerate mixtures estimates independent Auto Regressive (AR) processes from their sum. The system includes an identification system (20) and an estimator (22). A mixture (X) of two signals is inputted into the system and through the identifying and filtering processes, two estimates of the original signals are outputted. The identification system includes an ARMA identifier, a computation of autocovariance coefficients, an initializer and a gradient descent system. The estimator includes filtering.

摘要翻译： 一种系统的确从退化混合物重构独立的信号（语音1，语音2）独立估算自回归（AR）处理从它们的总和。 该系统包括在识别系统（20），并估计器（22）。 两条信号的混合物（X）被输入到系统中，并通过识别和滤波过程，原始信号的两个估计的输出。 该识别系统包括ARMA标识符，初始值设定和梯度下降系统的自协方差系数的计算。该估计器包括过滤。

公开(公告)号：EP0904640A1

公开(公告)日：1999-03-31

申请号：EP97928111.0

申请日：1997-06-09

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： KLEIN, Anja ,  BAIER, Paul, Walter ,  STEINER, Bernd ,  JUNG, Peter

IPC分类号： H03H21 ,  H04B1 ,  H04L25

CPC分类号： H04B1/7097 ,  H03H21/0012 ,  H03H2021/0034 ,  H04B1/707 ,  H04L25/0242 ,  H04L25/03006 ,  H04L25/03987 ,  H04L2025/03375 ,  H04L2025/03605

摘要： In a multi-subscriber radio system (1) in which the signals are given a subscriber-specific form, after a transmission via one and the same channel (4), the mixture of signals received at a subscriber's station (5) is separated in two steps a manner tailored specifically for the subscriber concerned. In the first step channels are equalised (7). In the subsequent second step the signals are filtered (8), whereby the filter coefficients are determined from the signal form specific to the subscriber concerned. The process of the invention can be used for the down-link of a mobile telephone system operating on CDMA.

公开(公告)号：EP0779709A2

公开(公告)日：1997-06-18

申请号：EP96119522.9

申请日：1996-12-05

申请人： MOTOROLA, INC.

发明人： Torkkola, Kari

IPC分类号： H03H21/00

CPC分类号： H03H21/0012 ,  G06K9/624 ,  H03H2021/0034

摘要： A method of recovering source signals (y1, y2) from an equal number of mixed signals (x1, x2) including components of the source signals. Channel one (x1) and two (x2) mixed signals are multiplied by channel one (w1) and two (w2) adaptive weights to produce channel one and two product signals, respectively. A channel one filtered feedback signal is generated from a channel two approximation signal (u2) and a channel two filtered feedback signal is generated from a channel one approximation signal (u1). The channel one filtered feedback signal is added to the channel one product signal to produce the channel one approximation signal (u1) and the channel two filtered feedback signal is added to the channel two product signal to produce the channel two approximation signal (u2). A nonlinear function (35, 36) is applied to the approximation signals (u1, u2) to produce output signals (y1, y2). The adaptive weights and the filtered feedback signals are adjusted (37) to maximize entropy of the output signals (y1, y2).

摘要翻译： 从在相等数目的混合信号的（X1，X2），包括源极信号的分量中恢复源信号（Y1，Y2）的方法。 通道的一个（X1）和两个（×2）的混合信号，乘以信道的一个（W1）和两个（W2）自适应权重，以产生信道1个2乘积信号，分别。 甲信道的一个滤波的反馈信号从信道2的近似信号（U2），并且从信道一个近似信号（U1）产生的信道两个滤波反馈信号来生成。 信道1滤波的反馈信号加到信道1个乘积信号产生信道1近似信号（U1）和信道2的滤波反馈信号加到信道2的乘积信号产生信道2的近似信号（U2）。 非线性函数（35，36）被施加到近似信号（U1，U2），以产生输出信号（Y1，Y2）。 自适应权重和过滤反馈信号进行调整（37）最大化输出信号（Y1，Y2）的熵。

公开(公告)号：EP1070390B1

公开(公告)日：2005-06-22

申请号：EP99944143.9

申请日：1999-04-08

申请人： Sarnoff Corporation

发明人： PARRA, Lucas ,  SPENCE, Clay, Douglas

IPC分类号： H03H21/00

CPC分类号： H03H21/0029 ,  G06K9/624 ,  H03H21/0012 ,  H03H2021/0034

公开(公告)号：EP0860944A1

公开(公告)日：1998-08-26

申请号：EP98200391.5

申请日：1998-02-09

申请人： PHILIPS ELECTRONICS N.V.

发明人： Deville, Yannick

IPC分类号： H03H21/00

CPC分类号： H03H21/0012 ,  G06K9/624 ,  H03H2021/0034

摘要： Le système (10) de séparation de sources traite des signaux d'entrée formés par des mélanges de signaux primaires issus des sources et estime les signaux primaires de manière à ce que les estimations ne divergent pas même en présence de signaux d'entrée non stationnaires.
Le système comprend un premier sous-ensemble (12) de séparation qui délivre des premières estimations des signaux primaires, un second sous-ensemble (14) qui détermine adaptativement les coefficients de séparation, un troisième sous-ensemble (15) qui normalise les premières estimations et délivre des premières estimations normalisées servant au calcul des coefficients de séparation.
Un module de sortie (17) permet de délivrer des estimations ayant entre elles un même rapport de proportionnalité que celui existant entre les signaux primaires. Un module de sélection (19) évite à une estimation d'être dupliquée sur plusieurs sorties dans le cas où certains signaux primaires sont absents ou très faibles.
Applications: Système de séparation de signaux de mélange, antenne, autoradio, chaîne Hi-Fi, télévision, système de téléconférence.

摘要翻译： 分离器从通过主信号混合形成的不同源获取输入信号（E（t））。 输入信号被施加到提供输出估计（Xi（t））的第一组件（12）。 组件使用由输出估计导出的分离系数（Wij），该组合接收输出估计并提供最大估计。 最大估计允许计算分离系数（14）。 选择模块（19）去除重复的信号。

公开(公告)号：EP0779709A3

公开(公告)日：1998-01-21

申请号：EP96119522.9

申请日：1996-12-05

申请人： MOTOROLA, INC.

发明人： Torkkola, Kari

IPC分类号： H03H21/00

CPC分类号： H03H21/0012 ,  G06K9/624 ,  H03H2021/0034

摘要： A method of recovering source signals (y1, y2) from an equal number of mixed signals (x1, x2) including components of the source signals. Channel one (x1) and two (x2) mixed signals are multiplied by channel one (w1) and two (w2) adaptive weights to produce channel one and two product signals, respectively. A channel one filtered feedback signal is generated from a channel two approximation signal (u2) and a channel two filtered feedback signal is generated from a channel one approximation signal (u1). The channel one filtered feedback signal is added to the channel one product signal to produce the channel one approximation signal (u1) and the channel two filtered feedback signal is added to the channel two product signal to produce the channel two approximation signal (u2). A nonlinear function (35, 36) is applied to the approximation signals (u1, u2) to produce output signals (y1, y2). The adaptive weights and the filtered feedback signals are adjusted (37) to maximize entropy of the output signals (y1, y2).