Fast Algorithm for CU Partitioning and Mode Selection in HEVC Intra Prediction
Jinzheng Lu, Yixian Li · 2019
Aiming at the high complexity problem of the new generation of high efficiency video coding (HEVC) intra-frame coding, a fast CU partitioning algorithm based on intra-frame neighbor information and an improved intra mode selection algorithm are proposed. The algorithm predicts the depth range by using the depth information of neighboring CUs, and then uses the improved mode selection algorithm to reduce the computational complexity of the overall intra prediction process. Compared with the HM16.1 standard model, the intra-frame coding time is reduced by 54%, the peak signal-to-noise ratio (PSNR) loss is about 0.0139 dB, and the code rate is increased by 0.7%on average. Experimental data shows that the proposed algorithm significantly shortens the intra-frame coding time while maintaining the image quality, which effectively reduces the complexity of the intra-frame coding algorithm.