CPC H04N 19/593 (2014.11) [H04N 19/11 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/186 (2014.11)] | 20 Claims |
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.
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