Patent ID: 11949898
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by at least one processor, the method comprising:
decoding a bitstream that includes a picture, the decoding comprising:
determining a nominal angle of a current block of the picture for intra prediction, wherein the nominal angle of the current block is a base directional mode for intra prediction of the current block;
determining a nominal angle of at least one neighboring block of the current block for intra prediction, wherein the nominal angle of the at least one neighboring block is a base directional mode for intra prediction of the at least one neighboring block; and
determining whether all allowed delta angles of the nominal angle of the current block are signalled or only a subset of the allowed delta angles of the nominal angle of the current block are signalled, based on a comparison between the nominal angle of the current block and the nominal angle of the at least one neighboring block; and
decoding the bitstream based on whether the all allowed delta angles of the nominal angle of the current block are signalled are signalled or only the subset of the allowed delta angles of the nominal angle of the current block are signalled.