Back to results
US 2020/0288163 A1Published application
Improved predictor candidates for motion compensation
AssigneeInterDigital VC Holdings, Inc.
InventorsTangi POIRIER, Antoine ROBERT, Fabrice LELEANNEC
Life of this patent
Estimating the term…
Abstract
Different implementations are described for determining a set of predictor candidates for affine merge coding mode from neighboring blocks for motion compensation of a picture block based on a motion model for a video content encoder or decoder.
Claims27
A method for video encoding, comprising:
- determining, for a block being encoded in a picture, at least one spatial neighboring block;
- determining, for the block being encoded, a set of predictor candidates for inter coding mode based on the at least one spatial neighboring block, wherein a predictor candidate comprises one or more control point motion vectors and one reference picture;
- determining, for the block being encoded and for each predictor candidate, a motion field based on a motion model and on the one or more control point motion vectors of the predictor candidate, wherein the motion field identifies motion vectors used for prediction of sub-blocks of the block being encoded;
- selecting a predictor candidate from the set of predictor candidates based on a rate distortion determination between predictions responsive to the motion field determined for each predictor candidate;
- encoding the block based on the motion field for the selected predictor candidate.
2 more elements
A method for video decoding, comprising:
- determining, for the block being decoded, at least one spatial neighboring block;
- determining, for the block being decoded, a set of predictor candidates for inter coding mode based on the at least one spatial neighboring block, wherein a predictor candidate comprises one or more control point motion vectors and one reference picture;
- determining, for the block being decoded, one or more control point motion vectors from a particular predictor candidate;
- determining, for the block being decoded, a motion field based on a motion model and on the one or more control point motion vectors for the block being decoded, wherein the motion field identifies motion vectors used for prediction of sub-blocks of the block being decoded;
- and
- decoding the block based on the determined motion field.
3 more elements
3-4. (canceled)
(canceled)
13-14. (canceled)
(canceled)
(canceled)
An apparatus for video encoding comprising at least a memory and and one or more processors configured for:
- determining, for a block being encoded in a picture, at least one spatial neighboring block;
- determining, for the block being encoded, a set of predictor candidates for inter coding mode based on the at least one spatial neighboring block, wherein a predictor candidate comprises one or more control point motion vectors and one reference picture;
- determining, for the block being encoded and for each predictor candidate, a motion field based on a motion model and on the one or more control point motion vectors of the predictor candidate, wherein the motion field identifies motion vectors used for prediction of sub-blocks of the block being encoded;
- selecting a predictor candidate from the set of predictor candidates based on a rate distortion determination between predictions responsive to the motion field determined for each predictor candidate;
- encoding the block based on the motion field for the selected predictor candidate.
2 more elements
An apparatus for video decoding comprising at least a memory and and one or more processors configured for:
- determining, for the block being decoded, at least one spatial neighboring block;
- determining, for the block being decoded, a set of predictor candidates for inter coding mode based on the at least one spatial neighboring block, wherein a predictor candidate comprises one or more control point motion vectors and one reference picture;
- determining, for the block being decoded, one or more control point motion vectors from a particular predictor candidate;
- determining, for the block being decoded, a motion field based on a motion model and on the one or more control point motion vectors for the block being decoded, wherein the motion field identifies motion vectors used for prediction of sub-blocks of the block being decoded;
- and
- decoding the block based on the determined motion field.
3 more elements
Dependencies are inferred from the claim text.