Method and apparatus for Intra prediction fusion in image and video coding

An apparatus for video encoding or decoding used by a video encoding system or video decoding system respectively, the apparatus comprising one or more electronic circuits or processors arranged to:

• receive input data associated with a current block in a current image;
• for at least one sample in the current block:
• identify a left reference sample and a right predictor in a same row as said at least one sample, wherein the left reference sample corresponds to a previously coded sample in an immediately left column of the current block and the right predictor located in an immediately right column of the current block is generated according to angular prediction;
• generate a first predictor by interpolating the left reference sample and the right predictor;
• identify a top reference sample and a bottom predictor in a same column as said at least one sample, wherein the top reference sample corresponds to a previously coded sample in an immediately above row of the current block and the bottom predictor located in an immediately below row of the current block is generated according to the angular prediction;
• generate a second predictor by interpolating the top reference sample and the bottom predictor;
• generate a final Intra prediction sample for said at least one sample in the current block according to the first predictor and the second predictor;
• and
• apply predictive encoding or decoding to the current block using an Intra prediction block comprising the final Intra prediction sample,
• wherein an interpolation process of the first predictor uses a first parameter depending on width of the current block;
• interpolation process of the second predictor uses a second parameter depending on height of the current block;
• and the final Intra prediction sample is generated using third parameters depending on both height and width of the current block for division-less implementation of the final Intra prediction sample,
• wherein a bottom-right corner predictor located at an intersection of the immediately right column of the current block and the immediately below row of the current block is generated from one or more reference samples in an angular direction associated with the angular prediction, wherein the right predictor is generated by interpolating the bottom-right corner predictor and a top-right reference sample located at an intersection of the immediately right column of the current block and the immediately above row of the current block, and the bottom predictor is generated by interpolating the bottom-right corner predictor and a bottom-left reference sample located at an intersection of the immediately left column of the current block and the immediately below row of the current block.

An apparatus for video encoding or decoding used by a video encoding system or video decoding system respectively, the apparatus comprising one or more electronic circuits or processors arranged to:

• receive input data associated with a current block in a current image;
• generate a first prediction block according to angular prediction;
• generate a second prediction block according to planar prediction;
• generate a final Intra prediction block according to the first prediction block and the second prediction block;
• and
• apply predictive encoding or decoding to the current block using the final Intra prediction block;
• wherein horizontal interpolation process of the planar prediction uses a first parameter depending on width of the current block;
• vertical interpolation process of the planar prediction uses a second parameter depending on height of the current block;
• and the final Intra prediction block is generated using third parameters depending on both height and width of the current block for division-less implementation of the planar prediction,
• wherein a bottom-right corner predictor located at an intersection of an immediately right column of the current block and the immediately below row of the current block is generated from one or more reference samples in an angular direction associated with the angular prediction, wherein the right predictor is generated by interpolating the bottom-right corner predictor and a top-right reference sample located at an intersection of the immediately right column of the current block and the immediately above row of the current block, and the bottom predictor is generated by interpolating the bottom-right corner predictor and a bottom-left reference sample located at an intersection of an immediately left column of the current block and the immediately below row of the current block.