US Patent 11805268 Two step cross-component prediction mode

A method for video bitstream processing includes generating, using a first video block derived from a third video block of a first component and having a first size, a prediction block for a second video block of a video related to a second component, where the first component is different from the second component, and where the second video block has a second size that is different from the first size. The method also includes performing, using the prediction block, a conversion between the second video block and a bitstream representation of the video according to a two-step cross-component prediction mode (TSCPM).