  Increasing the frame rate of a 3D video generally results in improved Quality
of Experience (QoE). However, higher frame rates involve a higher degree of
complexity in capturing, transmission, storage, and display. The question that
arises here is what frame rate guarantees high viewing quality of experience
given the existing/required 3D devices and technologies (3D cameras, 3D TVs,
compression, transmission bandwidth, and storage capacity). This question has
already been addressed for the case of 2D video, but not for 3D. The objective
of this paper is to study the relationship between 3D quality and bitrate at
different frame rates. Our performance evaluations show that increasing the
frame rate of 3D videos beyond 60 fps may not be visually distinguishable. In
addition, our experiments show that when the available bandwidth is reduced,
the highest possible 3D quality of experience can be achieved by adjusting
(decreasing) the frame rate instead of increasing the compression ratio. The
results of our study are of particular interest to network providers for rate
adaptation in variable bitrate channels.
