Methods and apparatuses for video encoding and video decoding

A method for video decoding, comprising:

• determining, for a block being decoded in a picture, a predictor candidate;
• determining for the predictor candidate, one or more corresponding control point generator motion vectors, based on motion information associated to the at least one predictor candidate;
• determining for the block being decoded, one or more corresponding control point motion vectors, based on the one or more corresponding control point generator motion vectors determined for the predictor candidate;
• determining, based on the one or more corresponding control point motion vectors determined for the block, a corresponding motion field, wherein the corresponding motion field identifies motion vectors used for prediction of sub-blocks of the block being decoded;
• decoding the block based on the corresponding motion field.

An apparatus for video decoding, comprising a memory and at least one processor configured for:

• determining, for a block being decoded in a picture, a predictor candidate;
• determining for the predictor candidate, one or more corresponding control point generator motion vectors, based on motion information associated to the at least one predictor candidate;
• determining for the block being decoded, one or more corresponding control point motion vectors, based on the one or more corresponding control point generator motion vectors determined for the predictor candidate;
• determining, based on the one or more corresponding control point motion vectors determined for the block, a corresponding motion field, wherein the corresponding motion field identifies motion vectors used for prediction of sub-blocks of the block being decoded;
• decoding the block based on the corresponding motion field.

A method for video encoding, comprising:

• determining, for a block being encoded in a picture, at least one predictor candidate;
• determining for the at least one predictor candidate, one or more corresponding control point generator motion vectors, based on motion information associated to the at least one predictor candidate;
• determining for the block being encoded, one or more corresponding control point motion vectors, based on the one or more corresponding control point generator motion vectors determined for the at least one predictor candidate;
• determining, based on the one or more corresponding control point motion vectors determined for the block, a corresponding motion field, wherein the corresponding motion field identifies motion vectors used for prediction of sub-blocks of the block being encoded;
• encoding the block based on the corresponding motion field.

An apparatus for video encoding, comprising a memory and at least one processor configured for:

• determining, for a block being encoded in a picture, at least one predictor candidate;
• determining for the at least one predictor candidate, one or more corresponding control point generator motion vectors, based on motion information associated to the at least one predictor candidate;
• determining for the block being encoded, one or more corresponding control point motion vectors, based on the one or more corresponding control point generator motion vectors determined for the at least one predictor candidate;
• determining, based on the one or more corresponding control point motion vectors determined for the block, a corresponding motion field, wherein the corresponding motion field identifies motion vectors used for prediction of sub-blocks of the block being encoded;
• encoding the block based on the corresponding motion field.