Patent ID: 11863752
Assignee: QUALCOMM INCORPORATED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of decoding video data, the method comprising:
constructing a general most probable mode list containing N entries, wherein the N entries of the general most probable mode list are intra prediction modes, and wherein constructing the general most probable mode list comprises:
adding a planar mode as an ordinal first entry in the general most probable mode list,
adding respective intra prediction modes from respective neighboring blocks of the current block of video data to the general most probable mode list, and
adding a plurality of intra prediction modes offset from the respective intra prediction modes from the respective neighboring blocks to the general most probable mode list;

constructing a primary most probable mode list from a first Np entries in the general most probable mode list, where Np is less than N;
constructing a secondary most probable mode list from a remaining (N−Np) entries in the general most probable mode list;
decoding an index into the primary most probable mode list or the secondary most probable mode list, wherein the index indicates a non-planar intra prediction mode in the primary most probable mode list or the secondary most probable mode list, decoding the index comprising:
determining a context for entropy decoding a first bin of the index based on whether a coding tool used for the current block of video data is a regular intra prediction mode, an intra sub-partition mode, or a multiple reference line mode, comprising selecting between at least a first value, a second, value, and a third value for the context based on the coding tool, the selecting consisting of: selecting the first value for the regular intra prediction mode, selecting the second value for the intra sub-partition mode, and selecting the third value for the multiple reference line mode; and
entropy decoding the first bin of the index using the context and entropy decoding the index based on the first bin;

determining a current intra prediction mode for a current block of video data using the primary most probable mode list or the secondary most probable mode list based on the index; and
decoding the current block of video data using the current intra prediction mode to generate a decoded block of video data.