Interpolation Scheme for Fractional-Pel Motion Compensation Using Multi-Directional Filters

The H.264/AVC video coding standard supports motion-compensated prediction with quarter-pel accuracy of motion vectors. In the case of fractional-pel motion vector, pixels at fractional positions have to be interpolated. In an interpolation scheme, the two most important criteria are computational complexity and coding efficiency. In order to enhance both the computational complexity and coding efficiency for various textures of videos, we propose a new interpolation scheme using multi-directional filters. Experimental results show that our proposed scheme outperforms other schemes, including the H.264/AVC standard and the latest interpolation schemes, in terms of both complexity and coding efficiency.