Abstract:
The emerging High Efficiency Video Coding(HEVC) standard adopts the quadtree-structured coding units,variable size of Coding Unit(CU),35 intra prediction modes,etc.Compared with other standards,HEVC provides higher coding efficiency,leading to higher coding complexity however.In order to reduce computational complexity,it proposes a depth decision algorithm for coding unit in HEVC by using the video temporal and spatial correlation.According to the depth in the previous and neighbor CU,it can pre-determine the candidate CU depth.Experimental results demonstrate that the proposed algorithm saves 30.2% encoding time on average while maintaining almost the same performance as the original HEVC algorithm.
Key words:
High Efficiency Video Coding(HEVC) standard,
Coding Unit(CU),
coding complexity,
temporal and spatial correlation,
depth decision,
coding time
摘要： 新一代高性能视频编码(HEVC)标准采用灵活的四叉树自适应存储结构、可变尺寸的编码块、35种帧内预测模式等新技术,能够有效提升HEVC的编码效率,但也造成了更高的编码复杂度。为此,提出一种基于时空相关性的编码单元深度决策算法。融合关联帧编码单元的深度信息及当前帧相邻编码单元的深度信息,从而预测当前编码单元的深度范围。实验结果表明,与HEVC标准测试算法相比,该算法能在不明显影响编码质量的基础上平均减少30.2%的编码时间。
关键词:
高性能视频编码标准,
编码单元,
编码复杂度,
时空相关性,
深度决策,
编码时间
CLC Number:
YAO Xiaomin,WANG Wanliang,CEN Yuefeng,WANG Chaochao. A Depth Decision Algorithm of Coding Unit for HEVC[J]. Computer Engineering, 2015, 41(1): 240-244.
姚晓敏,王万良,岑跃峰,王超超. 一种面向HEVC的编码单元深度决策算法[J]. 计算机工程, 2015, 41(1): 240-244.