Back to results
US 7,680,531 B2Granted
Separation of one or more fetal heart component signals from heart signal information obtained from a pregnant female
AssigneeThe Board of Trustees of the University of Illinois
InventorsMenachem H. Graupe, Daniel Graupe, Piotr L. Suliga, Yunde Zhong
Life of this patent
Estimating the term…
Abstract
One or more fetal heart component signals in one example are separated from heart signal information obtained from a pregnant female based on singular value decomposition.
Claims37
A method, comprising the step of:
- separating one or more fetal heart component signals from heart signal information obtained from a pregnant female based on singular value decomposition, wherein the step of separating the one or more fetal heart component signals from the heart signal information obtained from the pregnant female based on singular value decomposition comprises the steps of:
- computing a singular value decomposition of a covariance matrix of the heart signal information to yield a set of output signals;
- computing a delay parameter to minimize an absolute value of cross-correlations between the set of output signals;
- taking a singular value decomposition of the sum of a covariance matrix of the set of output signals;
- and
- taking a singular value decomposition of a transpose of the covariance matrix of the set of output signals to yield a separated output estimate of the one or more fetal heart component signals.
3 more elements
An apparatus, comprising:
- one or more processor components that separate one or more fetal heart component signals from heart signal information obtained from a pregnant female based on singular value decomposition;
- wherein one or more of the one or in ore processor components compute a singular value decomposition of a covariance matrix of the heart signal information to yield a set of output signals;
- wherein the one or more of the one or more processor components compute a delay parameter to minimize an absolute value of cross-correlations between the set of output signals;
- wherein the one or more of the one or more processor components take a singular value decomposition of the sum of a covariance matrix of the set of output signals;
- and
- wherein the one or more of the one or more processor components take a singular value decomposition of a transpose of the covariance matrix of the set of output signals to yield a separated output estimate of the one or more fetal heart component signals.
3 more elements
An article, comprising:
- one or more computer-readable signal-bearing media;
- and
- means in the one or more media for separating one or more fetal heart component signals from heart signal information obtained from a pregnant female based on singular value decomposition, wherein the means in the one or more media for separating one or more fetal heart component signals from the heart signal information obtained from the pregnant female based on singular value decomposition comprises:
- means in the one or more media for computing a singular value decomposition of a covariance matrix of the heart signal information to yield a set of output signals;
- means in the one or more media for computing a delay parameter to minimize an absolute value of cross-correlations between the set of output signals;
- means in the one or more media for taking a singular value decomposition of the sum of a covariance matrix of the set of output signals;
- and
- means in the one or more media for taking a singular value decomposition of a transpose of the covariance matrix of the set output signals to yield a separated output estimate of the one or more fetal heart component signals.
5 more elements
A method, comprising the steps of:
- employing one or more filters to extract one or more fetal heart component signals from heart signal information obtained from pregnant female;
- separating the one more fetal heart component signals from the heart signal information based on independent component analysis;
- and
- employing one or more blind adaptive filtering components to reduce noise in the one or more fetal heart component signals wherein the step of employing one or more blind adaptive filtering components to reduce noise in the one or more fetal heart component signals comprises the step of:
- operating the one or more blind adaptive filtering components in one or more of a frequency domain, a cepstral domain, and/or a wavelet transform domain, wherein the one or more blind adaptive filtering components operate in the cepstral domain, wherein the step of employing the cepstral analysis to reduce noise in the one or more fetal heart component signals comprises the steps of:
- employing a cepstral transformation, a cepstral filtration, and an inverse cepstral transformation to reduce the noise in the one or more fetal heart component signals;
- employing the cepstral transformation to identify one or more noise components in the one or more fetal heart component signals;
- employing the cepstral filtration to reduce one or more amplitudes of the one or more noise components in the one or more fetal heart component signals to change the one or more fetal heart component signals into one or more reduced noise fetal heart component signals;
- and
- employing the inverse cepstral transformation to output one or more of the one or more reduced noise fetal heart component signals.
7 more elements
An apparatus, comprising:
- one or more processor components that cause one or more filters to extract one or more fetal heart component from heart signal information obtained from a pregnant female;
- wherein a first one or more of the one or more processor components separate the one or more fetal heart component signals from the heart signal information based on independent component analysis;
- wherein a second one or more of the one or more processor components employ one or more blind adaptive filtering components to reduce noise in the one or more fetal heart component signals, wherein the second one or more of the one or more processor components employ cepstral transformation to identify one or more noise components in the one or more fetal heart component signals;
- wherein the second one or more of the one or more processor components employ cepstral filtration to reduce one or more amplitudes of the one or more noise components in the one or more fetal heart component signals to change the one or more fetal heart component signals into one or more reduced noise fetal heart component signals;
- wherein the second one or more of the one or more processor components employ inverse cepstral transformation to output one or more of the one or more reduced noise fetal heart component signals.
2 more elements
An article, comprising:
- one or more computer-readable signal-bearing media;
- means in the one or more media for employing one or more filters to extract one or more fetal heart component signals from heart signal information obtained from a pregnant female;
- means in the one or more media for separating the one or more fetal heart component signals from the heart signal information based on independent component analysis;
- and
- means in the one or more media for employing a cepstral analysis to reduce noise in the one or more fetal heart component signals.
2 more elements
Dependencies are inferred from the claim text.