Patent ID: 11949856
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of controlling intra prediction for decoding or encoding of a video sequence, the method being performed by at least one processor, and the method comprising:
obtaining intra prediction modes comprising directional modes respectively corresponding to angular prediction directions, and excluding either one or two of one or more of the directional modes from the intra prediction modes based on comparing a total number of the intra prediction modes to a number of a most probable mode (MPM), and the one or more of the directional modes excluded from the intra prediction modes comprising a first immediate mode corresponding to a first prediction direction immediately left of a second prediction direction corresponding to a second immediate mode, the second prediction direction immediately left of a vertical prediction direction corresponding to a vertical mode, among the directional modes;
selecting, as MPMs, two or more of the intra prediction modes from which the one or more of the directional modes are excluded; and
selecting, for decoding the video sequence, one of the intra prediction modes from which the one or more of the directional modes are excluded,
wherein excluding the either one or two of the one or more of the directional modes from the intra prediction modes comprises determining whether the total number is 68 and whether the number of the MPM is 2 or 3 such that:
in a case the number of the MPM is determined to be 3, the one or more of the directional modes is one angular prediction direction from 65 directional modes, and
in a case that the number of the MPM is determined to be 2, the one or more of the directional modes is two angular prediction directions from the 65 directional modes.