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公开(公告)号:US20110144522A1
公开(公告)日:2011-06-16
申请号:US12898508
申请日:2010-10-05
申请人: Paul Sajda , Lucas Cristobal Parra
发明人: Paul Sajda , Lucas Cristobal Parra
IPC分类号: A61B5/0476
CPC分类号: A61B5/0478 , A61B5/048 , A61B5/0482 , G06K9/0057
摘要: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
摘要翻译: 具有64或128个电极(10)的EEG帽(8)被放置在正在观看CRT监视器(14)的被摄体(11)的头部上。 每个通道上的信号由放大器(17)放大并发送到模拟 - 数字转换器(20)。 PC(23)捕获并记录放大的信号,并且通过进行线性信号处理的信号处理PC(26)处理信号。 所得到的信号被发送回具有监视器(14)的反馈/显示PC(29)。
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公开(公告)号:US07835787B2
公开(公告)日:2010-11-16
申请号:US10966290
申请日:2004-10-15
申请人: Paul Sajda , Lucas Cristobal Parra
发明人: Paul Sajda , Lucas Cristobal Parra
IPC分类号: A61B5/04
CPC分类号: A61B5/0478 , A61B5/048 , A61B5/0482 , G06K9/0057
摘要: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
摘要翻译: 具有64或128个电极(10)的EEG帽(8)被放置在正在观看CRT监视器(14)的被摄体(11)的头部上。 每个通道上的信号由放大器(17)放大并发送到模拟 - 数字转换器(20)。 PC(23)捕获并记录放大的信号,并且通过进行线性信号处理的信号处理PC(26)处理信号。 所得到的信号被发送回具有监视器(14)的反馈/显示PC(29)。
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公开(公告)号:US08731650B2
公开(公告)日:2014-05-20
申请号:US12898508
申请日:2010-10-05
申请人: Paul Sajda , Lucas Cristobal Parra
发明人: Paul Sajda , Lucas Cristobal Parra
IPC分类号: A61B5/04
CPC分类号: A61B5/0478 , A61B5/048 , A61B5/0482 , G06K9/0057
摘要: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
摘要翻译: 具有64或128个电极(10)的EEG帽(8)被放置在正在观看CRT监视器(14)的被摄体(11)的头部上。 每个通道上的信号由放大器(17)放大并发送到模拟 - 数字转换器(20)。 PC(23)捕获并记录放大的信号,并且通过进行线性信号处理的信号处理PC(26)处理信号。 所得到的信号被发送回具有监视器(14)的反馈/显示PC(29)。
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公开(公告)号:US20090326404A1
公开(公告)日:2009-12-31
申请号:US10966290
申请日:2004-10-15
申请人: Paul Sajda , Lucas Cristobal Parra
发明人: Paul Sajda , Lucas Cristobal Parra
IPC分类号: A61B5/0484
CPC分类号: A61B5/0478 , A61B5/048 , A61B5/0482 , G06K9/0057
摘要: An EEG cap (8) having 64 or 128 electrodes (10) is placed on the head of the subject (11) who is viewing CRT monitor (14). The signals on each channel are amplified by amplifier (17) and sent to an analog-to-digital converter (20). PC (23) captures and records the amplified signals and the signals are processed by signal processing PC (26) performing linear signal processing. The resulting signal is sent back to a feedback/display PC (29) having monitor (14).
摘要翻译: 具有64或128个电极(10)的EEG帽(8)被放置在正在观看CRT监视器(14)的被摄体(11)的头部上。 每个通道上的信号由放大器(17)放大并发送到模拟 - 数字转换器(20)。 PC(23)捕获并记录放大的信号,并且通过进行线性信号处理的信号处理PC(26)处理信号。 所得到的信号被发送回具有监视器(14)的反馈/显示PC(29)。
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公开(公告)号:US07917336B2
公开(公告)日:2011-03-29
申请号:US10470498
申请日:2002-01-17
申请人: Lucas Cristobal Parra , Christopher Vincent Alvino , Clay Douglas Spence , Craig Langdale Fancourt
发明人: Lucas Cristobal Parra , Christopher Vincent Alvino , Clay Douglas Spence , Craig Langdale Fancourt
IPC分类号: G06F19/00
CPC分类号: H03H21/0027 , G06K9/624 , G10L21/0272 , G10L2021/02166 , H03H2021/0036
摘要: A computer system that processes mixtures of signals, such as speech and noise sources derived from multiple simultaneous microphone recordings, in order to separate them into their underlying sources. A source separation routine optimizes a filter structure by minimizing cross powers of multiple output channels while enforcing geometric constraints on the filter response. The geometric constraints enforce desired responses for given locations of the underlying sources, based on the assumption that the sources are localized in space.
摘要翻译: 处理来自多个同时麦克风记录的语音和噪声源的信号混合的计算机系统,以将它们分离成它们的潜在源。 源分离程序通过最小化多个输出通道的交叉功率来优化滤波器结构,同时对滤波器响应实施几何约束。 基于源在本地化的假设,几何约束对基础源的给定位置执行预期响应。
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公开(公告)号:US06898612B1
公开(公告)日:2005-05-24
申请号:US09597105
申请日:2000-06-20
CPC分类号: G06K9/6243 , G10L21/0272 , H03H21/0012 , H03H21/0029 , H03H2021/0034
摘要: A method and apparatus is disclosed for performing blind source separation using convolutive signal decorrelation. For a first embodiment, the method accumulates a length of input signal (mixed signal) that includes 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 within each T-length period. Thereafter, estimated cross-correlation values are computed using a plurality of the averaged 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 finite impulse response (FIR) filter that will effectively separate the source signals within the input signal. A second embodiment of the invention is directed to on-line processing of the input signal—i.e., processing the signal as soon as it arrives with no storage of the signal data. In particular, an on-line gradient algorithm is provided for application to non-stationary signals and having an adaptive step size in the frequency domain based on second derivatives of the cost function. The on-line separation methodology of this embodiment is characterized as multiple adaptive decorrelation.
摘要翻译: 公开了一种使用卷积信号去相关进行盲源分离的方法和装置。 对于第一实施例,该方法累积包括来自独立信号源的多个独立信号的输入信号(混合信号)的长度。 然后,本发明将输入信号的长度划分成多个T长度周期(窗口),并在每个T长度周期内对该信号执行离散付里叶变换(DFT)。 此后,使用多个平均DFT值来计算估计的互相关值。 计算总共K个互相关值,其中K个值中的每一个在T个长度周期的N个上被平均。 使用互相关值,梯度下降处理计算有效脉冲响应(FIR)滤波器的系数,其将有效地分离输入信号内的源信号。 本发明的第二个实施例涉及输入信号的在线处理,即,一旦信号到达就处理该信号而没有信号数据的存储。 特别地,提供在线梯度算法用于非平稳信号的应用,并且基于成本函数的二阶导数在频域中具有自适应步长。 本实施例的在线分离方法被表征为多自适应去相关。
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公开(公告)号:US07603401B2
公开(公告)日:2009-10-13
申请号:US11095346
申请日:2005-03-31
CPC分类号: G06K9/6243 , G10L21/0272 , H03H21/0012 , H03H21/0029 , H03H2021/0034
摘要: A method and apparatus is disclosed for performing blind source separation using convolutive signal decorrelation. For a first embodiment, 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 within each T-length period. Thereafter, estimated cross-correlation values are computed using a plurality of the averaged 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. A second embodiment of the invention is directed to on-line processing of the input signal—i.e., processing the signal as soon as it arrives with no storage of the signal data. In particular, an on-line gradient algorithm is provided for application to non-stationary signals and having an adaptive step size in the frequency domain based on second derivatives of the cost function. The on-line separation methodology of this embodiment is characterized as multiple adaptive decorrelation.
摘要翻译: 公开了一种使用卷积信号去相关进行盲源分离的方法和装置。 对于第一实施例,该方法累积包括来自独立信号源的多个独立信号的输入信号(混合信号)的长度。 然后,本发明将输入信号的长度划分成多个T长度周期(窗口),并对每个T长度周期内的信号执行离散付里叶变换(DFT)。 此后,使用多个平均DFT值来计算估计的互相关值。 计算总共K个互相关值,其中K个值中的每一个在T个长度周期的N个上被平均。 使用互相关值,梯度下降处理计算将有效地分离输入信号内的源信号的FIR滤波器的系数。 本发明的第二个实施例涉及输入信号的在线处理,即,一旦信号到达就处理该信号而没有信号数据的存储。 特别地,提供在线梯度算法用于非平稳信号的应用,并且基于成本函数的二阶导数在频域中具有自适应步长。 本实施例的在线分离方法被表征为多自适应去相关。
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