Patent ID: 11871033
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of directional intra prediction for chroma component of a picture, the method comprising:
obtaining an initial intra prediction mode of the chroma component of the picture;
deriving a chroma intra prediction mode (intraPredModeC) from a look up table (LUT) by using the initial intra prediction mode of the chroma component, wherein a horizontal direction of the chroma component (SubWidthC) is different from a vertical direction of the chroma component (SubHeightC);
performing wide-angle mapping on the intraPredModeC to obtain a modified intraPredModeC;
obtaining an angle parameter for the chroma component based on the modified intraPredModeC; and
obtaining predicted samples of the chroma component based on the angle parameter.