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US 11,889,064 B2Granted
Method and apparatus for processing video signal
AssigneeKt Corporation
InventorBae Keun Lee
Life of this patent
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Abstract
An image decoding method according to the present invention may comprise the steps of: deriving a merge candidate from a candidate block; generating a first merge candidate list including the merge candidate; specifying any one of a plurality of merge candidates included in the first merge candidate list; deriving affine vectors of a current block on the basis of motion information of the specified merge candidate; deriving a motion vector of a sub-block in the current block on the basis of the affine vectors; and performing motion compensation on the sub-block on the basis of the motion vector.
Claims9
A method of decoding a video, the method comprising:
- deriving an affine merge candidate from a neighboring block adjacent to a current block;
- generating a merge candidate list including the affine merge candidate;
- determining one of a plurality of merge candidates in the merge candidate list based on index information signaled from a bitstream, the index information specifying the one of the plurality of merge candidates;
- deriving first motion vectors of the current block based on the determined merge candidate;
- deriving a second motion vector of the current block based on the first motion vectors of the current block, the second motion vector being derived in units of sub-blocks in the current block;
- generating prediction samples of the current block by performing inter prediction on the current block based on the second motion vector;
- and
- reconstructing the current block based on the prediction samples,
- wherein the affine merge candidate is derived based on corner motion vectors of the neighboring block, and
- wherein, based on whether the neighboring block is included in the same CTU (Coding Tree Unit) as the current block, positions of corners corresponding to the corner motion vectors used to derive the affine merge candidate are differently determined.
7 more elements
A method of encoding a video, the method comprising:
- deriving an affine merge candidate from a neighboring block adjacent to a current block;
- generating a merge candidate list including the affine merge candidate;
- deriving first motion vectors of the current block based on one of a plurality of merge candidates in the merge candidate list;
- deriving a second motion vector of the current block based on the first motion vectors of the current block, the second motion vector being derived in units of sub-blocks in the current block;
- generating prediction samples of the current block by performing inter prediction on the current block based on the second motion vector;
- and
- encoding the current block based on the prediction samples,
- wherein index information specifying the one of the plurality of merge candidates is encoded into a bitstream,
- wherein the affine merge candidate is derived based on corner motion vectors of the neighboring block, and
- wherein, based on whether the neighboring block is included in the same CTU (Coding Tree Unit) as the current block, positions of corners corresponding to the corner motion vectors used to derive the affine merge candidate are differently determined.
7 more elements
A method of transmitting data for a video signal, the method comprising:
- obtaining a bitstream for the video signal, wherein obtaining the bitstream comprises:
- deriving an affine merge candidate from a neighboring block adjacent to a current block;
- generating a merge candidate list including the affine merge candidate;
- deriving first motion vectors of the current block based on one of a plurality of merge candidates in the merge candidate list;
- deriving a second motion vector of the current block based on the first motion vectors of the current block, the second motion vector being derived in units of sub-blocks in the current block;
- generating prediction samples of the current block by performing inter prediction on the current block based on the second motion vector;
- and
- encoding the current block based on the prediction samples;
- and
- transmitting the data including the bitstream,
- wherein index information specifying the one of the plurality of merge candidates is encoded into the bitstream,
- wherein the affine merge candidate is derived based on corner motion vectors of the neighboring block, and
- wherein, based on whether the neighboring block is included in the same CTU (Coding Tree Unit) as the current block, positions of corners corresponding to the corner motion vectors used to derive the affine merge candidate are differently determined.
10 more elements
Dependencies are inferred from the claim text.