Planar prediction mode for visual media encoding and decoding

An apparatus for video processing, comprising:

• a processor configured to:
• select a first set of reference samples comprising a top reference sample and a left reference sample that are reconstructed neighboring samples of a current block;
• determine a second set of reference samples based on the first set of reference samples, the second set of reference samples comprising a bottom neighboring sample and a right neighboring sample that are neighboring samples of the current block;
• and
• determine a first prediction value the right neighboring sample, p[W][y], of the current block based on a weighted sum from the first set of reference samples of a first sample in a first predetermined location, p[W][−1], of a same column as the right neighboring sample and a second sample in a variable location, p[−1][y], in a same row as the right neighboring sample, wherein the right neighboring sample is expressed as:
• p
• [
• W
• ]
• [
• y
• ]
• =
• W
• W
• +
• y
• +
• 1
• ⁢
• p
• [
• W
• ]
• [
• -
• 1
• ]
• +
• y
• +
• 1
• W
• +
• y
• +
• 1
• ⁢
• p
• [
• -
• 1
• ]
• [
• y
• ]
• wherein W is a fixed value and y is a variable value,
• wherein the right neighboring sample is aligned horizontally with the first sample, and
• wherein the right neighboring sample is aligned vertically with the second sample.