A generalized subspace approach for estimating visual evoked potentials.

N.S., Kamel and M.Z., Yusoff (2008) A generalized subspace approach for estimating visual evoked potentials. Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, 2008 . pp. 5208-5211. ISSN 1557170X

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A "single-trial" signal subspace approach for extracting visual evoked potential (VEP) from the ongoing 'colored' electroencephalogram (EEG) noise is proposed. The algorithm applies the generalized eigendecomposition on the covariance matrices of the VEP and noise to transform them jointly into diagonal matrices in order to avoid a pre-whitening stage. The proposed generalized subspace approach (GSA) decomposes the corrupted VEP space into a signal subspace and noise subspace. Enhancement is achieved by removing the noise subspace and estimating the clean VEPs only from the signal subspace. The validity and effectiveness of the proposed GSA scheme in estimating the latencies of P100's (used in objective assessment of visual pathways) are evaluated using real data collected from Selayang Hospital in Kuala Lumpur. The performance of GSA is compared with the recently proposed single-trial technique called the Third Order Correlation (TOC).

Item Type:Article
Uncontrolled Keywords:algorithm; article; computer assisted diagnosis; electroencephalography; event related potential; evoked visual response; human; methodology; physiology; reproducibility; sensitivity and specificity; signal processing; visual cortex; Algorithms; Diagnosis, Computer-Assisted; Electroencephalography; Event-Related Potentials, P300; Evoked Potentials, Visual; Humans; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Visual Cortex
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments / MOR / COE:Departments > Electrical & Electronic Engineering
ID Code:440
Deposited By: Assoc Prof Dr Nidal Kamel
Deposited On:09 Mar 2010 01:59
Last Modified:19 Jan 2017 08:26

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