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Memorias de investigación
Communications at congresses:
BRAIN COMPUTER INTERFACE - Application of an Adaptive Bi-stage Classifier based on RBF-HMM
Year:2010
Research Areas
  • Service robots
Information
Abstract
Brain Computer Interface is an emerging technology that allows new output paths to communicate the users intentions without the use of normal output paths, such as muscles or nerves. In order to obtain their objective, BCI devices make use of classifiers which translate inputs from the users brain signals into commands for external devices. This paper describes an adaptive bi-stage classifier. The first stage is based on Radial Basis Function neural networks, which provides sequences of pre-assignations to the second stage, that it is based on three different Hidden Markov Models, each one trained with pre-assignation sequences from the cognitive activities between classifying. The segment of EEG signal is assigned to the HMMwith the highest probability of generating the pre-assignation sequence. The algorithm is tested with real samples of electroencephalografic signal, from five healthy volunteers using the cross-validation method. The results allow to conclude that it is possible to implement this algorithm in an on-line BCI device. The results also shown the huge dependency of the percentage of the correct classification from the user and the setup parameters of the classifier.
International
Si
Congress
The International Joint Conference on Biomedical Engineering Systems and Technologies
960
Place
Valencia-España
Reviewers
Si
ISBN/ISSN
978-989-674-017-7
Start Date
20/01/2010
End Date
24/01/2010
From page
13
To page
20
Proceedings of the Third International Conference on Biomedical Electronics and Devices
Participants
  • Autor: Antonio Barrientos Cruz (UPM)
  • Autor: José Luis Martínez Pérez
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Robótica y Cibernética
  • Departamento: Automática, Ingeniería Electrónica e Informática Industrial
  • Centro o Instituto I+D+i: Centro de Automática y Robótica (CAR). Centro Mixto UPM-CSIC
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