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

Claim 10:
11. An apparatus configured to decode video data, the apparatus comprising:
means for 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 the means for constructing the general most probable mode list comprises:
means for adding a planar mode as an ordinal first entry in the general most probable mode list,
means for adding respective intra prediction modes from respective neighboring blocks of the current block of video data to the general most probable mode list, and
means for 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;

means for 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;
means for constructing a secondary most probable mode list from a remaining (N−Np) entries in the general most probable mode list;
means for 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, the means for decoding the index comprising:
means for 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 means for selecting between at least a first value, a second, value, and a third value for the context based on the coding tool, the means for selecting being configured to select the first value for the regular intra prediction mode, select the second value for the intra sub-partition mode, and select the third value for the multiple reference line mode; and
means for entropy decoding the first bin of the index using the context and entropy decoding the index based on the first bin;

means for 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
means for decoding the current block of video data using the current intra prediction mode to generate a decoded block of video data.