Fast intra partition and mode prediction for equirectangular projection 360-degree video coding
Fast intra partition and mode prediction for equirectangular projection 360-degree video coding
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DOI：
10.1049/ipr2.12655
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发表时间：
2022-10-14
影响因子：
2.3
通讯作者：
Yuan Bo-Sen
中科院分区：
文献类型：
--
作者：
Shu Zheng-Jie;Peng Zong-Ju;Yuan Bo-Sen
360-学位视频已经引起了学术界和产业界的高度关注。对于360度视频的传输和存储，联合视频探索团队提出了通用视频编码（VVC）标准。与先前的高效率视频编码相比，VVC可以显著降低比特率，同时保持相同的主观视觉质量。然而，VVC的计算复杂度非常高，这阻碍了交互式应用。提出了一种适用于等矩形投影360度视频编码的快速帧内划分方法和模式预测算法。首先，引入基于纬度的预处理以提前终止极区中的编码单元（CU）分区。其次，使用支持向量机来预测CU分区类型。第三，快速帧内模式搜索方法加速帧内模式预测。实验结果表明，该算法可以显着获得平均时间减少率为60.40%和Bjontegaard delta率增加1.96%。
360-degree videos have drawn great attention from both the academia and the industry. For transmission and storage of 360-degree video, the joint video exploration team proposed the Versatile Video Coding (VVC) standard. VVC can significantly reduce the bitrate while maintaining the same subjective visual quality compared to the preceding high efficiency video coding. However, the computational complexity of VVC is extremely high which hinders the interactive applications. This paper proposes a fast intra partition method and mode prediction algorithm for equirectangular projection 360-degree video coding. First, a latitude-based preprocessing is introduced to early terminate the Coding Unit (CU) partition in the polar region. Second, the support vector machine is used to predict the CU partition type. Third, the fast intra mode search method accelerates the intra mode prediction. Experimental results show that the proposed algorithm can significantly obtain an average time reduction rate of 60.40% and a Bjontegaard delta rate increase of 1.96%.