Fast wedgelet pattern decision for DMM in 3D-HEVC

3D-HEVC is in the process of standardization as the highest profile extension of HEVC for 3D video coding, which supports the advanced 3D video format, namely multi-view videos plus depth (MVD). In order to preserve the sharp edges and avoid the ringing artifacts in the synthesized views, depth modelling modes (DMMs) are adopted into 3D-HEVC to achieve high coding efficiency. However, the computational complexity increases significantly with these modes. In this paper, an efficient algorithm of wedgelet pattern decision is proposed for one type of the DMMs: the explicit wedgelet signaling or equivalently DMM1. The proposed algorithm roughly estimates the position of sharp edges by pre-defined regions. Then the optimal wedgelet pattern is only searched in the most probable region. Simulation results show that our algorithm saves about 55% time of the wedgelet pattern selection with the BD-Rate increased by 0.49% in average.