Fine-grained intra prediction fusion

A method for video encoding, the method comprising:

• determining a plurality of intra predictions of a current block based on a plurality of respective intra prediction modes;
• determining a fused prediction of the current block based on a weighted summation of the plurality of intra predictions of the current block, the weighted summation being according to respective weights associated with the plurality of intra predictions, and
• encoding the current block based on the fused prediction, wherein
• each of the weights is based on one of a plurality of weighting functions that depends on a sample location (x, y) and the intra prediction mode of the intra prediction associated with the respective weight.

A method of processing visual media data, the method comprising:

• processing a bitstream of the visual media data according to a format rule, wherein
• the bitstream includes a syntax element indicating that a current block is predicted based on a combination of a plurality of intra prediction modes;
• and
• the format rule specifies that:
• a plurality of intra predictions of the current block is determined based on the respective intra prediction modes;
• a fused prediction of the current block is determined based on a weighted summation of the plurality of intra predictions of the current block, the weighted summation being according to respective weights associated with the plurality of intra predictions;
• the current block is reconstructed based on the fused prediction;
• and
• each of the weights is based on one of a plurality of weighting functions that depends on a sample location (x, y) and the intra prediction mode of the intra prediction associated with the respective weight.