System and method of separating signals
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Abstract
A computer-implemented method and apparatus that adapts class parameters, classifies data and separates sources configured in one of multiple classes whose parameters (i.e. characteristics) are initially unknown. A mixture model is used in which the observed data is categorized into two or more mutually exclusive classes. The class parameters for each of the classes are adapted to a data set in an adaptation algorithm in which class parameters including mixing matrices and bias vectors are adapted. Each data vector is assigned to one of the learned mutually exclusive classes. The adaptation and classification algorithms can be utilized in a wide variety of applications such as speech processing, image processing, medical data processing, satellite data processing, antenna array reception, and information retrieval systems.
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Citations
61 Claims
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1-31. -31. (canceled)
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32. A method for characterizing independent-source signals from mixed-source signals, comprising:
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determining a plurality of mixed-source vectors from a plurality of mixed-source signals;
defining a plurality of class indices for classifying the mixed-source vectors into a plurality of classes for separating sources;
defining a plurality of class parameters associated with the class indices;
adapting the class parameters according to a learning rule for classifying the mixed-source vectors;
classifying the mixed-source vectors based on the learning rule and the adapted class parameters; and
determining a plurality of independent-source vectors from the mixed-source vectors classified by a selected class index, wherein the independent-source vectors characterize one or more independent-source signals. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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39. A method for characterizing independent-source signals from mixed-source signals, comprising:
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determining a plurality of mixed-source vectors from a plurality of mixed-source signals;
defining a plurality of class indices for classifying the mixed-source vectors into a plurality of classes for separating sources;
defining a plurality of class parameters associated with the class indices;
adapting the class parameters based on a learning rule, wherein the adapted class parameters determine a plurality of filters associated with the class indices for relating mixed-source vectors with independent-source vectors that characterize independent-source signals - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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47. An apparatus for characterizing independent-source signals from mixed-source signals, the apparatus comprising executable instructions for:
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determining a plurality of mixed-source vectors from a plurality of mixed-source signals;
defining a plurality of class indices for classifying the mixed-source vectors into a plurality of classes for separating sources;
defining a plurality of class parameters associated with the class indices;
adapting the class parameters according to a learning rule for classifying the mixed-source vectors;
classifying the mixed-source vectors based on the learning rule and the adapted class parameters; and
determining a plurality of independent-source vectors from the mixed-source vectors classified by a selected class index, wherein the independent-source vectors characterize one or more independent-source signals. - View Dependent Claims (48, 49, 50, 51, 52, 53)
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54. An apparatus of characterizing independent-source signals from mixed-source signals, the apparatus comprising executable instructions for:
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determining a plurality of mixed-source vectors from a plurality of mixed-source signals;
defining a plurality of class indices for classifying the mixed-source vectors into a plurality of classes for separating sources;
defining a plurality of class parameters associated with the class indices;
adapting the class parameters based on a learning rule, wherein the adapted class parameters determine a plurality of filters associated with the class indices for relating mixed-source vectors with independent-source vectors that characterize independent-source signals - View Dependent Claims (55, 56, 57, 58, 59, 60, 61)
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Specification