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US 2026/0313118 A1Published application
Encoding method and device, and decoding method and device
AssigneeSamsung Electronics Co., Ltd.
InventorsAnish TAMSE, Yin-ji PIAO, Jin-Young LEE
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Abstract
Provided is a video decoding method including: obtaining affine parameter group candidates of a current block based on whether adjacent blocks of the current block are decoded; determining an affine parameter group of the current block from among the affine parameter group candidates, according to affine parameter information of the current block; and reconstructing the current block, based on one or more affine parameters included in the affine parameter group.
Claims3
A video decoding method comprising:
- obtaining affine parameter group candidates of a current block based on whether adjacent blocks of the current block are decoded;
- determining an affine parameter group of the current block from among the affine parameter group candidates, according to affine parameter information of the current block;
- and
- reconstructing the current block, based on two or three affine parameters included in the affine parameter group,
- wherein the affine parameter group candidates include a first affine parameter group candidate, a second affine parameter group candidate and a third affine parameter group candidate,
- the first affine parameter group candidate is determined based on a motion vector obtained from one or more adjacent block corresponding to a top-left point of the current block,
- the second affine parameter group candidate is determined based on a motion vector obtained from one or more adjacent blocks corresponding to a bottom-left point of the current block,
- the third affine parameter group candidate is determined based on a motion vector obtained from one or more adjacent blocks corresponding to a bottom-right point of the current block, and
- the one or more adjacent blocks corresponding to the bottom-right point of the current block is decoded prior to the current block.
6 more elements
A video encoding method comprising:
- determining affine parameter group candidates of a current block based on whether adjacent blocks of the current block are decoded;
- determining an affine parameter group for predicting the current block;
- determining affine parameter information of the current block indicating the affine parameter group of the current block;
- and
- generating a bitstream including the affine parameter information of the current block,
- wherein the affine parameter group candidates include a first affine parameter group candidate, a second affine parameter group candidate and a third affine parameter group candidate,
- the first affine parameter group candidate is determined based on a motion vector obtained from one or more adjacent block corresponding to a top-left point of the current block,
- the second affine parameter group candidate is determined based on a motion vector obtained from one or more adjacent blocks corresponding to a bottom-left point of the current block, and
- the third affine parameter group candidate is determined based on a motion vector obtained from one or more adjacent blocks corresponding to a bottom-right point of the current block, and
- the one or more adjacent blocks corresponding to the bottom-right point of the current block is encoded prior to the current block.
7 more elements
Dependencies are inferred from the claim text.