Overlapped Block Motion Compensation Using Modified Sigmoid Window

In this paper, we present a new method to perform overlapped block motion compensation (OBMC) using the modified Sigmoid window (MSW). The proposed MSW-OBMC method uses a variable weighting function to generate a window in order to maximally reduce the blocky artifacts on the edges of the block under consideration. It can be applied in any block partitioned motion compensation scheme. Benchmarked with other relevant methods, the proposed method shows better performance in reducing prediction error energy or blocky artifacts.