Werner Dreher
Werner Dreher
Publications
2018
The effect of monitor raster latency on VEPs, ERPs and Brain-Computer Interface performance
by Sebastian Nagel, Werner Dreher, Wolfgang Rosenstiel, and Martin SpülerIn Journal of Neuroscience Methods 295: 45-50, 2018. [BIB] [DOI] [ABSTRACT]
Abstract: BACKGROUND: Visual neuroscience experiments and Brain–Computer Interface (BCI) control often require strict timings in a millisecond scale. As most experiments are performed using a personal computer (PC), the latencies that are introduced by the setup should be taken into account and be corrected. As a standard computer monitor uses a rastering to update each line of the image sequentially, this causes a monitor raster latency which depends on the position, on the monitor and the refresh rate. NEW METHOD: We technically measured the raster latencies of different monitors and present the effects on visual evoked potentials (VEPs) and event-related potentials (ERPs). Additionally we present a method for correcting the monitor raster latency and analyzed the performance difference of a code-modulated VEP BCI speller by correcting the latency. COMPARISON WITH EXISTING METHODS: There are currently no other methods validating the effects of monitor raster latency on VEPs and ERPs. RESULTS: The timings of VEPs and ERPs are directly affected by the raster latency. Furthermore, correcting the raster latency resulted in a significant reduction of the target prediction error from 7.98% to 4.61% and also in a more reliable classification of targets by significantly increasing the distance between the most probable and the second most probable target by 18.23%.
@article{SWWM012018,
author = {Nagel, Sebastian and Dreher, Werner and Rosenstiel, Wolfgang and Spüler, Martin},
title = {The effect of monitor raster latency on VEPs, ERPs and Brain-Computer Interface performance},
journal = {Journal of Neuroscience Methods},
year = {2018},
month = {jan},
volume = {295},
pages = {45-50},
doi = {10.1016/j.jneumeth.2017.11.018},
month_numeric = {1}
}
1999
Das Weaver-II-Board als neue HW/SW-Codesign Plattform
by Werner Dreher, Hans-Georg Martin, and Wolfgang RosenstielIn SDA , 1999. [BIB]
@inproceedings{WHGW1999,
author = {Dreher, Werner and Martin, Hans-Georg and Rosenstiel, Wolfgang},
title = {Das Weaver-II-Board als neue HW/SW-Codesign Plattform},
booktitle = {SDA },
year = {1999}
}