Adaptive Early Termination Algorithm Using Coding Unit Depth History in HEVC
Adaptive Early Termination Algorithm Using Coding Unit Depth History in HEVC
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DOI：
10.1007/s11265-018-1399-y
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发表时间：
2018-07
期刊：
影响因子：
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通讯作者：
J. Bae;M. Sunwoo
中科院分区：
文献类型：
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作者：
J. Bae;M. Sunwoo
提出一种基于编码单元(CU)深度历史(AECH)的自适应提前终止算法。AECH使用共址编码树单元(CTU)的时间相关性，并跟踪CU深度历史。为了跟踪CU深度历史，AECH计算所有CU深度值的平均值，并找出CU深度历史与平均值的标准偏差。然后基于与平均值的标准偏差自适应地选择目标CU深度范围。该算法可以跳过超出范围的CU深度。因此，它可以大大降低计算复杂度。与高效视频编码测试模型(HM)9.0和12.0版本相比，AECH的时间节约(TS)性能分别为42.15%和41.08%(低延迟B)。此外，AECH在HM 12.0中显示了40.51%的TS(低延迟P)。此外，在HM 9.0和HM 12.0中，Bjontegaard增量码率(BDBR)分别仅增加约1.22%和1.04%(低延迟B)。此外，AECH在HM 12.0中获得了1.26%的BDBR(低延迟P)。
This study proposes an adaptive early termination algorithm using a coding unit (CU) depth history (AECH). AECH uses the temporal correlation of co-located coding tree units (CTUs) and traces a CU depth history. For tracing the CU depth history, AECH computes the average of all CU depth values and finds the standard deviation of the CU depth history from the average. The target CU depth range is then adaptively chosen based on the standard deviation from the mean. The proposed algorithm can skip the CU depths, which are out of range. Thus, it can considerably reduce computational complexity. AECH yields time-saving (TS) performance of 42.15 and 41.08% (low delay B) compared to the high efficiency video coding test model (HM) 9.0 and 12.0 version, respectively. Furthermore, AECH shows 40.51% TS (low delay P) in HM 12.0. In addition, the proposed algorithm increments Bjontegaard delta bitrate (BDBR) at only approximately 1.22 and 1.04% (low delay B) in HM 9.0 and HM 12.0, respectively. Moreover, AECH achieves 1.26% BDBR (low delay P) in HM 12.0.