An efficient low-bit rate motion compensation technique based on quadtree

Summary form only given. A quadtree structured motion compensation technique effectively utilizes the motion content of a frame as oppose to a fixed size block motion compensation technique. In this paper, we propose a novel quadtree-structured region-wise motion compensation technique that divides a frame into equilateral triangle blocks using the quadtree structure. Arbitrary partition shapes are achieved by allowing 4-to-1, 3-to-1 and 2-to-1 merge/combine of sibling blocks having the same motion vector. We propose an optimal code scheme and a temporal predictive coding for the quadtree. Simulation results show that our techniques reduce the bit rate by 40% compared to other methods