基于HEVC帧内预测的复杂度控制

帧内预测在视频编码中是非常重要的模块.在视频实时编码与传输过程中,场景切换会经常出现.此时,一般会采用全Ⅰ帧编码.研究发现,即使是全Ⅰ帧编码,也往往会非常耗时.基于编码单元深度范围和帧内预测中候选预测方向个数研究了HEVC编码器的复杂度控制问题.针对不同的目标编码复杂度,算法自适应地选择不同的方法来优化编码过程.实验结果表明,该算法在保证视频质量的前提下实现了对不同复杂度目标的控制.

Complexity Control of HEVC Intra Prediction

Intra prediction is a very important module in video coding. In real-time video coding and transmission, scene changes frequently occur and all-I frames are usually adopted. Researches have showed that it also will take lots of time even using the all-I frames coding. In this paper, the coding unit depth range and the number of candidate prediction in intra prediction are used to control the coding complexity. According to different target coding complexity, different algorithm is adaptively used to optimize the coding process. The experiment results show that the algorithm in this paper achieves the different target complexity control on the condition of ensuring the quality of the video.