Priority-based template matching intra prediction

Template matching intra prediction has been reported earlier, to generate intra prediction signal from wider reconstructed areas compared with H.264/AVC intra prediction. In this paper an improved intra prediction scheme which introduces priority-guided template matching is presented. The proposed method first calculates a priority value of each pixel on the border between the current to-be-predicted block and the reconstructed or predicted area, and then performs template matching for the template centered on the pixel with the highest priority among all the border pixels, in an iterative manner. Simulation results demonstrate that the proposed algorithm can save about 2% bitrate than the non-priority algorithm.