关键词: 高效视频编码, 帧内编码, 最大编码单元, 模式选择

Abstract: To solve the problem of high computational complexity and long coding time of intra prediction in High Efficiency Video Coding （HEVC）, a fast intra coding algorithm is proposed. Firstly, the spatio-temporal correlation of adjacent Largest Coding Unit （LCU） depth is used to narrow the depth range of LCU and then unnecessary depth can be split or prune early. At the same time, according to whether Planar is selected as the optimal prediction mode, the number of prediction modes is reduced in different methods. Compared with original HM10.0, experimental results show that the proposed algorithm can save nearly 30% encoding time with the same coding performance and has practical applications.

Key words: High Efficiency Video Coding（HEVC）, intra coding, Largest Coding Unit（LCU）, mode decision