Coding of color attribute components in geometry-based point cloud compression (G-PCC)

An apparatus for decoding encoded point cloud data may be configured to: determine, for a point in a point cloud, a first attribute value of a first color component based on a first prediction value and a first residual value; applying a scaling factor to the first residual value to determine a predicted second residual value, where the scaling factor has one or both of a non-integer value or an absolute value greater than one; for a point in the point cloud, receiving a second residual value in the encoded point cloud data; determining a final second residual value based on the predicted second residual value and the received second residual value; and determining, for points in the point cloud, a second attribute value of the second color component based on the second predicted value and the final second residual value. 一种用于解码编码的点云数据的设备，可被配置为：针对点云中的点，基于第一预测值和第一残差值来确定第一颜色分量的第一属性值；将缩放因子应用于第一残差值以确定预测的第二残差值，其中，缩放因子具有非整数值或大于一的绝对值中的一个或两个；针对点云中的点，接收编码的点云数据中的第二残差值；基于预测的第二残差值和接收的第二残差值来确定最终的第二残差值；并且针对点云中的点，基于第二预测值和最终