A new block-based coding method for HEVC intra coding

This paper presents a new block-based coding method for HEVC intra coding. Pixels in each prediction block are divided into two parts: half pixels are coded by a smart padding technique together with a constrained quantization algorithm; whereas the other half are reconstructed by simple linear interpolations along the prediction direction utilizing the neighboring reference pixels and the first half coded pixels. In the implementation, we employ a competition mechanism between this new method and the original HEVC intra coding in order to choose the best mode for each prediction block. Simulation results show that about 2% BD-rate reduction has been achieved with respect to HEVC´s intra coding.