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Changes in blinking behavior while watching videos with reduced quality
Citation key schleicher2013a
Author Schleicher, Robert and Arndt, Sebastian and Antons, Jan-Niklas
Title of Book Abstracts of the 17th European Conference on Eye Movements
Pages 130
Year 2013
ISSN 1995-8692
DOI 10.16910/jemr.6.3.1
Workshop Conference
Location Lund, Sweden
Month aug
Note Electronic/online
Series ECEM
How Published Abstract
Abstract This study examines the effect of quality impairment on eye blink behavior as an indicator for fatigue while watching HD movies. Subjects watched eighteen minutes excerpts from a HD movie of sea-life scenes in original quality as well as with a reduced bitrate, a common impairment when streaming audiovisual material. Each six minutes, subjects rated the perceived video quality on a scale recommended by the International Telecommunication Union (ITU). Order of presentation was randomized across subjects. The version with reduced bitrate was rated to be of significantly lower quality than the high-quality version. Eye movements were recorded using electrooculogram (EOG), and blinks were extracted semi-automatically using freely available software for Matlab. All blink parameters were normalized subject-wise using the first two minutes of each video block as a baseline. While the interval between two blinks, i.e. the blink rate, showed no significant change between or within the videos, indicating comparable visual load across the sequences, average blink duration was significantly higher for the lower quality video, indicating a stronger fatiguing effect caused by the quality impairments. These results suggest that blink parameters can be deployed to assess the tonic effects of reduced video quality on the viewer.
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