Content Based Hierarchical Fast Coding Unit Decision Algorithm for HEVC
Content Based Hierarchical Fast Coding Unit Decision Algorithm for HEVC
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DOI：
10.1109/cmsp.2011.167
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
Jie Leng;Lei Sun;T. Ikenaga;S. Sakaida
中科院分区：
文献类型：
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作者：
Jie Leng;Lei Sun;T. Ikenaga;S. Sakaida
大编码单元，也称为超级宏块，已经被采用在下一代编码标准高效视频编码的测试模型中。大于16 × 16且小于或等于64 × 64的编码单元提供了极大的比特率节省，但编码复杂度急剧增加。在本文中，我们提出了一种快速的编码单元决定算法，无论是在帧级或编码单元级，以加快编码过程。在帧级，通过分析各深度编码单元的利用率，跳过指定深度内几个很少使用的编码单元。在编码单元级别中，参考相邻和共置编码单元信息以进一步跳过不必要深度中的编码单元。结果表明，我们提出的算法提供了平均45%的总编码时间减少和率失真性能的下降可以忽略不计。
Large coding unit which is also known as super macroblock, has already been adopted in the test model of next generation coding standard called high efficiency video coding. The coding unit which is larger than 16x16 and less than or equal to 64x64 provides great bit rate saving while the coding complexity increases dramatically. In this paper, we propose a fast coding unit decision algorithm in either frame level or coding unit level to accelerate encoding procedure. In frame level, by analyzing the utilization rate of coding unit in all depth, we skip several rarely used coding units in specified depth. In coding unit level, the neighbor and co-located coding unit information are referred for further skipping coding unit in unnecessary depth. Results show our proposed algorithm provides averagely 45% total encoding time reduction and negligible drop of rate distortion performance.