Predicting Tolerance to Velocity Mismatch Between Virtual and Physical Head Rotation in Cloud Virtual Reality Systems

The idea of virtual velocity loss strategy is introduced to reduce the viewport quality degradation caused by the limited capacity and bandwidth of current network transmission for cloud virtual reality service. To avoid the negative effect of velocity mismatch, this paper quantitatively models the human perceptual tolerance to the velocity mismatch with regard to various physical rotational velocities and velocity losses through a psychophysiological experiment. The experimental results revealed a decreased tolerance to loss for larger physical velocity. We found that virtual rotational velocity can be tuned at least about 25.8 % less than physical rotational velocity.