  Plenoptic images and videos bearing rich information demand a tremendous
amount of data storage and high transmission cost. While there has been much
study on plenoptic image coding, investigations into plenoptic video coding
have been very limited. We investigate the motion compensation for plenoptic
video coding from a slightly different perspective by looking at the problem in
the ray-space domain instead of in the conventional pixel domain. Here, we
develop a novel motion compensation scheme for lenslet video under two
sub-cases of ray-space motion, that is, integer ray-space motion and fractional
ray-space motion. The proposed new scheme of light field motion-compensated
prediction is designed such that it can be easily integrated into well-known
video coding techniques such as HEVC. Experimental results compared to relevant
existing methods have shown remarkable compression efficiency with an average
gain of 19.63% and a peak gain of 29.1%.
