Graphics Reference
In-Depth Information
Our HVS is still capable to align and fuse stereoscopic content if one view is affected by
artifacts due to compression, transmission, and rendering. Binocular suppression theory
suggests that in these situations the overall perception is usually driven by the quality of
the best view (i.e., left or right view), at least if the quality of the worst view is above a
threshold value. However this capability is limited and studies show that additional cog-
nitive load is necessary to fuse these views
[113].
Increased cognitive load leads to visual
fatigue and eye strain and prevents users from watching 3D content for a long time. This
directly affects user perception and QoE. If one of the views is extremely altered by the
transmission system, the HVS will not be able to fuse the affected views, and this causes
binocular rivalry. This has detrimental effects on the final QoE perceived by the end user.
Recent studies on3Dvideo transmission
[112]
have found that binocular rivalry is causing
theoverallperceptiontobeaffectedandthiseffectprevailsovertheeffectofbinocularsup-
pression.Toavoidthedetrimentaleffectofbinocularrivalry,thetransmission system could
be designed appropriately taking this issue into account. For instance, the transmission
systemparameterscanbeupdated“onthefly”toobtain3Dviewswithminimumdistortions,
according to the feedback on the measure of 3D video quality at the receiver-side. In case
of low quality due to different errors in the two views, if the received quality of one of
the views is significantly low, the transmission system could be informed to allocate more
resources to the worse view or to increase the error protection level for that 3D video
channel to mitigate the quality loss in the future. This increases the opportunity to fuse the
3D video content more effectively and improve the final QoE of users.
