US Patent 11470307 Harmonized local illumination compensation and intra block copy coding

A video processing method is provided to include determining, for a conversion between a current block of a current video picture of a video and a coded representation of the video, that both a local illumination compensation (LIC) tool and an intra block copy (IBC) tool are enabled for the conversion of the current block, and performing the conversion based on the determining. The LIC tool uses a linear model of illumination changes in the current block during the conversion, and the IBC tool uses a portion of the current video picture for the conversion of the current block.