Tagging the World: Broad-Band noise tagging as an alternative to steady-state frequency tagging
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2013-07-31
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en
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Abstract
In the field of EEG-based Brain Computer Interfaces the Evoked Potential
is a well-studied response. To elicit this response, frequency tagging
is a common paradigm to use. In this paradigm a periodic stimulus signal
elicits Steady-State Evoked Potentials.
Recently, an alternative has been proposed called noise tagging. In this
method Pseudo-Random Noise sequences are used to watermark stimuli.
These Broad-Band stimuli also elicit Evoked Potentials in EEG.
Like Steady-State Evoked Potentials they can be used in different sensory
modalities, in this paper visual stimulation with LEDs was used.
Using noise tagging it is possible to model and predict the response based
on the specific stimulus bit-sequence. The paradigm that was developed
allows for short train sessions, a high number of classes that require no
extra classifier training, a prior selection of a set of optimal code sequences
and high information transfer rates.
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Faculteit der Sociale Wetenschappen