Method and apparatus for extracting low SNR transient signals from noise
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United States of America Patent
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May 24, 2005
Grant Date -
Jan 22, 2004
app pub date -
Sep 26, 2001
filing date -
Dec 30, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for processing a composite signal generated by a transient signal generation mechanism to extract a repetitive low SNR transient signal, such as an evoked potential (EP) appearing in an electroencephalogram (EEG) generated in response to sensory stimulation, by: (a) dynamically identifying, via a learning process, the major transient signal types in the composite signal; (b) decomposing the identified major transient signal types into their respective constituent components; (c) synthesizing a parametric model emulating the transient signal generation mechanism; and (d) utilizing the model and the constituent components to identify and extract the low SNR transient signal from the composite signal.
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