The present invention provides a method and an apparatus for inter-channel prediction and transform for point-cloud attribute coding. The method includes the steps of: obtaining a first reconstructedresidual; obtaining a quantization index of a second reconstructed residual; obtaining the second reconstructed residual, based on the obtained quantization index of the second reconstructed residualand the obtained first reconstructed residual; and obtaining a color attribute of a point of a point cloud by decoding the obtained second reconstructed residual or decoding a transform residual basedon the obtained second reconstructed residual.
METHOD AND APPARATUS FOR INTER-CHANNEL PREDICTION AND TRANSFORM FOR POINT-CLOUD ATTRIBUTE CODING