Method and Apparatus for Cross Component Linear Model with Multiple Hypotheses Intra Modes in Video Coding System

An apparatus for intra prediction for colour pictures, the apparatus comprising one or more electronics or processors arranged to:

• receive input data associated with a current block comprising at least one colour block, wherein the input data comprise pixel data for the current block to be encoded at an encoder side or encoded data associated with said at least one colour block to be decoded at a decoder side, and wherein the current block is coded in an intra block mode;
• determine a blending predictor according to a weighted sum of at least two candidate predictions generated based on one or more first hypotheses of prediction, one or more second hypotheses of prediction, or both, wherein said one or more first hypotheses of prediction are generated based on one or more intra prediction modes comprising a DC mode, a planar mode or at least one angular modes, and said one or more second hypotheses of prediction are generated based on one or more cross-component modes and a collocated block of said at least one colour block;
• and
• encode the input data associated with said at least one colour block using the blending predictor at the encoder side or decode the input data associated with said at least one colour block using the blending predictor at the decoder side.