Waveform analysis apparatus and method using neural network techniques
First Claim
1. A wave analysis assembly for discriminating electrical signals and for producing output indicative of disease characteristics, said assembly comprising;
- means (12) for producing an electrical signal, control means (20) for identifying the location of individual unknown waveforms occurring about a peak within said electrical signal and producing a set comprised of the individual unknown waveforms, extraction neural network (22, 22'"'"') having a distributed network of synaptic weights for receiving said set and for learning the unknown waveform within said electrical signal through a mapping transformation of said individual waveforms of the set in the distributed network of synaptic weights to develop and store an idealized representation of the unknown waveform producing a learned waveform and for extracting said learned waveform from said electrical signal, and output means (42) for outputting information based on said extracted waveform.
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Abstract
A waveform analysis assembly (10) includes a sensor (12) for detecting physiological electrical and mechanical signals produced by the body. An extraction neural network (22, 22'"'"') will learn a repetitive waveform of the electrical signal, store the waveform in memory (18), extract the waveform from the electrical signal, store the location times of occurrences of the waveform, and subtract the waveform from the electrical signal. Each significantly different waveform in the electrical signal is learned and extracted. A single or multilayer layer neural network (22, 22'"'"') accomplishes the learning and extraction with either multiple passes over the electrical signal or accomplishes the learning and extraction of all waveforms in a single pass over the electrical signal. A reducer (20) receives the stored waveforms and times and reduces them into features characterizing the waveforms. A classifier neural network (36) analyzes the features by classifying them through nonliner mapping techniques within the network representing diseased states and produces results of diseased states based on learned features of the normal and patient groups.
236 Citations
33 Claims
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1. A wave analysis assembly for discriminating electrical signals and for producing output indicative of disease characteristics, said assembly comprising;
- means (12) for producing an electrical signal, control means (20) for identifying the location of individual unknown waveforms occurring about a peak within said electrical signal and producing a set comprised of the individual unknown waveforms, extraction neural network (22, 22'"'"') having a distributed network of synaptic weights for receiving said set and for learning the unknown waveform within said electrical signal through a mapping transformation of said individual waveforms of the set in the distributed network of synaptic weights to develop and store an idealized representation of the unknown waveform producing a learned waveform and for extracting said learned waveform from said electrical signal, and output means (42) for outputting information based on said extracted waveform.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wave analysis assembly for discriminating physiological signals produced within the body and for producing output indicative of disease characteristics, said assembly comprising;
- means for supplying a plurality of independent features characteristic of a waveform contained within a physiological signal, a classifier neural network (36) having a nonlinear distributed network of learned features and combinations thereof associated with a plurality of disease and normal patient states for transforming the features characterizing the physiological signal through the distributed network to produce an output representative of any of said plurality diseased and normal states, and output means for receiving the output and indicating the diseased and normal states.
- View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A wave analysis assembly for discriminating electrical signals having a waveform, said assembly comprising;
- input means (12) for sampling an electrical signal, control means (20) for identifying the location of individual unknown waveforms occurring about a peak within said electrical signal and producing a set comprised of the individual unknown waveforms, extraction neural network (22, 22'"'"') having a distributed network of synaptic weights for receiving the set and for learning the unknown waveform by a mapping transformation of said individual waveforms of the set in the distributed network of synaptic weights to produce a learned waveform and for extracting the learned waveform from the electrical signal, and output means (42) for outputting information of said extracted waveform, said extraction neural network including learning means for learning a template waveform inputted by the user for the extraction.
- View Dependent Claims (19)
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20. A method of discriminating electrical signals and producing an output, said method comprising the steps of:
- sensing the signals and producing an electrical signal, identifying the location of individual unknown waveforms occurring about a peak within the electrical signal, producing a set comprised of the individual unknown waveforms, learning the unknown waveform within the electrical signal by a mapping transformation of the individual waveforms of the set in a distributed network of synaptic weights to produce a learned waveform, extracting the learned waveform from the electrical signal, and outputting information based on the extracted waveform.
- View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for discriminating physiological signals produced within the body and for producing output indicative of disease characteristics, the method including the steps of;
- producing a plurality of independent features characteristic of a waveform contained within a physiological signal, learning and storing known features and combinations thereof associated with a plurality of disease and normal patient states in a distributed network, transforming the features through the distributed network to produce an output signal representative of any of said plurality of diseased states.
- View Dependent Claims (32, 33)
Specification