US Patent 12003749 Mapping intra prediction modes to wide angle modes

A method for video encoding includes selecting a second intra prediction mode for encoding a first block, the first block being a non-square block and the second intra prediction mode being selected from a second set of intra prediction modes. The method also includes generating prediction information for the first block, the generated prediction information indicating a first intra prediction mode in a first set of intra prediction modes. The second set of intra prediction modes includes at least the selected second intra prediction mode, which is not included in the first set of intra prediction modes and is outside an angular range of the first set of intra prediction modes that extends 180 degrees from a bottom-left diagonal direction mode to a top-right diagonal direction mode. The method also includes encoding at least one sample of the first block according to the second intra prediction mode.