We present a fast block partitioning scheme for chrominance intra prediction of the Versatile Video Coding (VVC) standard. VVC adopted several innovative tools to improve the coding performance compared with its predecessor standard, enabling the efficient handling of emerging video content such as ultra-high definition (UHD). These coding performance improvements come at the cost of a significant increase in coding complexity, mainly due to the new block partitioning structure called quadtree with nested multi-type tree (QTMT), which can be applied separately for luminance and chrominance components. Thus, this work proposes a scheme focusing on chrominance intra coding, composed of chrominance splitting early termination based on luminance QTMT and fast chrominance split decision based on the sub-block variances. Experimental results demonstrated that the proposed scheme provides 60.03% and 8.18% of chrominance and total encoding time savings, respectively, with a negligible impact of 0.66% in the YUV-BDBR.

中文翻译：

---

通用视频编码标准色度帧内预测的快速块分割方案

我们提出了一种用于多功能视频编码 (VVC) 标准的色度帧内预测的快速块分割方案。与之前的标准相比，VVC 采用了多种创新工具来提高编码性能，从而能够高效处理新兴视频内容，例如超高清 (UHD)。这些编码性能的改进是以编码复杂度的显着增加为代价的，这主要是由于称为带有嵌套多类型树 (QTMT) 的四叉树的新块分区结构，它可以分别应用于亮度和色度分量。因此，这项工作提出了一种专注于色度帧内编码的方案，由基于亮度 QTMT 的色度分裂早期终止和基于子块方差的快速色度分裂决策组成。