Method and apparatus for multi-line intra prediction

An apparatus for controlling intra prediction for encoding of a video sequence, the apparatus comprising:

• at least one memory configured to store computer program code;
• and
• at least one processor configured to access the at least one memory and operate according to the computer program code, the computer program code comprising:
• first applying code configured to cause the at least one processor to, based on a reference line index signaling a first reference line nearest to a coding unit, among a plurality of reference lines adjacent to the coding unit, apply intra smoothing on one or more first reference lines comprising the first reference line, among the plurality of reference lines, and
• second applying code configured to cause the at least one processor to, based on the intra smoothing being applied on the one or more first reference lines, apply a position-dependent intra prediction combination (PDPC) on one or more third reference lines comprising the first reference line, among the plurality of reference lines, while preventing application of the PDPC on one or more fourth reference lines other than the one or more third reference lines, among the plurality of reference lines.