There has been a consensus of cross-component prediction in video compression that the interchannel redundancies can be effectively removed through a linear prediction model. To fully explore the similarities existing in different color components, we propose prediction with multicross component (PMC) as a new chroma intracoding mode for the emerging video coding standard AVS3. The proposed PMC enjoys extremely low operational complexity and high flexibility, which advocates to reuse and reform the linear prediction model of conventional two-step cross-component prediction mode. Moreover, dual-prediction patterns of PMC are exploited to enhance the prediction efficiency. Experimental results on AVS3 test model HPM-6.0 show that PMC brings 0.32%, 1.60%, and 2.39% BD-rate savings for Y, Cb, and Cr components, respectively, under all intraconfiguration with natural-scene videos. Moreover, 0.91%, 2.24%, and 2.82% BD-rate gains can be observed on screen-content videos. Subset modes of PMC have been adopted by AVS3.

中文翻译：

---

使用多交叉组件预测未来视频编码


视频压缩中的跨分量预测已经达成共识，即可以通过线性预测模型有效地消除通道间冗余。为了充分探索不同颜色分量中存在的相似性，我们提出使用多重交叉分量（PMC）进行预测作为新兴视频编码标准 AVS3 的新色度帧内编码模式。所提出的PMC具有极低的运算复杂度和高度的灵活性，提倡重用和改造传统两步跨分量预测模式的线性预测模型。此外，利用PMC的双预测模式来提高预测效率。 AVS3 测试模型 HPM-6.0 的实验结果表明，在自然场景视频的所有内部配置下，PMC 分别为 Y、Cb 和 Cr 分量带来了 0.32%、1.60% 和 2.39% 的 BD 速率节省。此外，在屏幕内容视频上可以观察到 0.91%、2.24% 和 2.82% 的 BD 速率增益。 AVS3采用了PMC的子集模式。