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

Claim 10:
11. A system comprising:
at least one memory configured to store computer program code; and
at least one processor configured to access the computer program code and operate as instructed by the computer program code, the computer program code comprising:
decoding code configured to cause the at least one processor to decode a bitstream that includes a picture, the decoding code comprising:
first determining code configured to cause the at least one processor to determine 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;
second determining code configured to cause the at least one processor to determine 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
third determining code configured to cause the at least one processor to determine 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

outputting code configured to cause the at least one processor to decode 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.