SHVC中CU分割模式快速算法的研究

Fast Algorithm for CU Splitting Mode in SHVC

虽然可伸缩高效视频编码(SHVC)可以实现对视频序列的分层编码,但其编码的时间复杂度也会大大增加,尤其是在编码单元(CU)分割模式的判决过程中,其可能性高达85种,需要遍历每种情况以选出最佳CU分割模式。为了加速增强层(EL)CU分割模式的决策进程,基于当前CU与空间上相邻的CU以及当前CU在基本层(BL)相同位置CU的分割模式的相关性,提出了CU分割模式快速决策算法。实验结果证明,在基本不改变视频的重建质量情况下,与SHVC的标准代码SHM-9.0比较,文章提出的快速算法可以减少16.1%~32.7%的编码时间。此外,仿真结果也证明了快速算法的有效性。

Scalable extension of high efficiency video coding （SHVC） can achieve hierarchical coding -br video sequences, because of the realization of the hierarchical coding, the time complexity of coding is greatly increased, especially in the decision process of split mode for coding unit（CU） , and its probability of split mode is up to 85, need to traverse each mode to select the best CU split mode. In order to accelerate the decision process of the enhancement layer （EL） CU segmentation mode, based on the correlation of split mode among the current CU and the adjacent CU in space and the same position CU in base layer （BL）, this paper proposed a fast algorithm for CU split mode. The experiment results show that, in the guaranteeing the video quality is basically unchanged, compared with SHVC standard SHM-9.0, the total coding time can be reduced by about 16.1% to 32.7%. The simulation results show that the fast algorithm proposed in this paper is effective.