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  4. Latency Correction of Error Potentials Between Different Experiments Reduces Calibration Time for Single-Trial Classification
 
conference paper

Latency Correction of Error Potentials Between Different Experiments Reduces Calibration Time for Single-Trial Classification

Iturrate, Iñaki
•
Chavarriaga, Ricardo  
•
Montesano, Luis
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2012
2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society
34th International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'12)

One fundamental limitation of EEG-based brain- computer interfaces is the time needed to calibrate the system prior to the detection of signals, due to the wide variety of issues affecting the EEG measurements. For event-related potentials (ERP), one of these sources of variability is the application performed: Protocols with different cognitive workloads might yield to different latencies of the ERPs. In this sense, it is still not clear the effect that these latency variations have on the single-trial classification. This work studies the differences in the latencies of error potentials across three experiments with increasing cognitive workloads. A delay-correction algorithm based on the cross-correlation of the averaged signals is presented, and tested with a single-trial classification of the signals. The results showed that latency variations exist between different protocols, and that it is feasible to re-use data from previous experiments to calibrate a classifier able to detect the signals of a new experiment, thus reducing the calibration time.

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Type
conference paper
DOI
10.1109/EMBC.2012.6346667
Author(s)
Iturrate, Iñaki
Chavarriaga, Ricardo  
Montesano, Luis
Minguez, Javier
Millán, José del R.  
Date Issued

2012

Published in
2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Start page

3288

End page

3291

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CNBI  
CNP  
Event nameEvent placeEvent date
34th International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'12)

San Diego

August 28 - September 1, 2012

Available on Infoscience
June 4, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/81327
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