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An Efficient CU Partition Algorithm for HEVC Based on Improved Sobel Operator

机译：基于改进的Sobel算子的高效HEVC CU分区算法

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As the latest video coding standard, High Efficiency Video Coding (HEVC) achieves over 50% bit rate reduction with similar video quality compared with previous standards H.264/AVC. However, the higher compression efficiency is attained at the cost of significantly increasing computational load. In order to reduce the complexity, this paper proposes a fast coding unit (CU) partition technique to speed up the process. To detect the edge features of each CU, a more accurate improved Sobel filtering is developed and performed By analyzing the textural features of CU, an early CU splitting termination is proposed to decide whether a CU should be decomposed into four lower-dimensions CUs or not. Compared with the reference software HM16.7, experimental results indicate the proposed algorithm can lessen the encoding time up to 44.09% on average, with a negligible bit rate increase of 0.24%, and quality losses lower 0.03 dB, respectively. In addition, the proposed algorithm gets a better trade-off between complexity and rate-distortion among the other proposed works.
机译：作为最新的视频编码标准，与以前的标准H.264 / AVC相比，高效视频编码（HEVC）在视频质量相似的情况下可将比特率降低50％以上。但是，以显着增加计算负荷为代价获得了更高的压缩效率。为了降低复杂度，本文提出了一种快速编码单元（CU）分割技术以加快处理速度。为了检测每个CU的边缘特征，开发并执行了更精确的改进的Sobel滤波。通过分析CU的纹理特征，提出了早期的CU拆分终止，以决定是否应将CU分解为四个较低维度的CU。 。与参考软件HM16.7相比，实验结果表明，该算法平均可减少编码时间达44.09％，而比特率的增加可忽略不计0.24％，而质量损失则降低了0.03 dB。另外，在其他提出的工作中，提出的算法在复杂度和速率失真之间获得了更好的权衡。

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