Adaptive patch matching for motion compensated prediction

Motion compensated prediction (MCP) plays an important role in video coding due to its great capability of reducing temporal redundancy. In this paper, we propose a new MCP scheme by adaptive patch matching with the full use of the reconstructed pixels surrounding the current block (referred to as the template inside the patch) aiming at achieving a more accurate prediction than conventional MCP. The proposed scheme not only takes advantage of the temporal correlation but also efficiently exploits the spatial correlation between the current block and its template inside the patch. An adaptive linear combination of the current block and its template in motion estimation is designed to generate an optimal prediction while maintaining the local variation of the current block. Accordingly, a modification of the rate-distortion criterion is introduced to select the combined prediction. Experimental results show that our proposed APM achieves improved coding performance compared with H.264/AVC.