3D immersive communications are trending as real-time point
clouds capture and display of point cloud video become feasible.
This paper presents a novel motion-compensated approach to encoding
dynamic voxelized point clouds (VPC) at low bit rates. A simple
coder breaks the VPC into blocks which are intra-frame coded or
replaced by a motion-compensated version of a block in the previous
frame. The decision is optimized in a rate-distortion sense, encoding
with distortion both geometry and the color, at reduced bit-rates. Inloop
filtering is employed to minimize compression artifacts caused
by distortion in the geometry information. Simulations reveal that
this simple motion compensated coder can efficiently extend the
compression range of dynamic voxelized point clouds to rates below
what intra-frame coding alone can accommodate, trading rate for
geometry accuracy.