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US 12,750,487 B2Granted
Image encoding/decoding method and device, and recording medium having bitstream stored thereon
AssigneeLG Electronics Inc.
InventorsJunghak Nam, Jaehyun Lim, Naeri Park, Sunmi Yoo, Hyeongmoon Jang, Jangwon Choi
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Abstract
An image decoding/encoding method and device disclosed herein can: acquire prediction samples of the current block; determine a reference area for the current block on the basis of one of a plurality of modes pre-defined in the decoding/encoding device; derive parameters for correcting the prediction samples of the current block, the parameters being derived on the basis of the reference area for the current block; and correct the prediction samples of the current block on the basis of the parameters.
Claims10
An image decoding method, comprising:
- obtaining a prediction sample of a current block;
- deriving, based on one of a plurality of modes, a parameter for modifying the prediction sample of the current block;
- and
- modifying the prediction sample of the current block based on the parameter,
- wherein the parameter includes at least one of a weight or an offset applied to the prediction sample,
- wherein the plurality of modes includes at least two of a first mode for deriving the parameter using, as a reference region, a top neighboring region and a left neighboring region of the current block, a second mode for deriving the parameter using, as the reference region, a left neighboring region of the current block, or a third mode for deriving the parameter using, as the reference region, a top neighboring region of the current block, and
- wherein the left neighboring region of the second mode includes a sample line that is not adjacent to the current block, and the top neighboring region of the third mode includes a sample line that is not adjacent to the current block.
4 more elements
An image encoding method, comprising:
- obtaining a prediction sample of a current block;
- deriving, based on one of a plurality of modes, a parameter for modifying the prediction sample of the current block;
- and
- modifying the prediction sample of the current block based on the parameter,
- wherein the parameter includes at least one of a weight or an offset applied to the prediction sample,
- wherein the plurality of modes includes at least two of a first mode for deriving the parameter using, as a reference region, a top neighboring region and a left neighboring region of the current block, a second mode for deriving the parameter using, as the reference region, a left neighboring region of the current block, or a third mode for deriving the parameter using, as the reference region, a top neighboring region of the current block, and
- wherein the left neighboring region of the second mode includes a sample line that is not adjacent to the current block, and the top neighboring region of the third mode includes a sample line that is not adjacent to the current block.
4 more elements
A non-transitory computer-readable storage medium storing a bitstream generated by an image encoding method, the image encoding method comprising:
- obtaining a prediction sample of a current block;
- deriving, based on one of a plurality of modes, a parameter for modifying the prediction sample of the current block;
- and
- modifying the prediction sample of the current block based on the parameter,
- wherein the parameter includes at least one of a weight or an offset applied to the prediction sample,
- wherein the plurality of modes includes at least two of a first mode for deriving the parameter using, as a reference region, a top neighboring region and a left neighboring region of the current block, a second mode for deriving the parameter using, as the reference region, a left neighboring region of the current block, or a third mode for deriving the parameter using, as the reference region, a top neighboring region of the current block, and
- wherein the left neighboring region of the second mode includes a sample line that is not adjacent to the current block, and the top neighboring region of the third mode includes a sample line that is not adjacent to the current block.
4 more elements
A method for transmitting data for image information, the method comprising:
- obtaining a prediction sample of a current block;
- deriving, based on one of a plurality of modes, a parameter for modifying the prediction sample of the current block;
- modifying the prediction sample of the current block based on the parameter;
- encoding the current block based on the modified prediction sample to generate a bitstream;
- and
- transmitting the data including the bitstream,
- wherein the parameter includes at least one of a weight or an offset applied to the prediction sample,
- wherein the plurality of modes includes at least two of a first mode for deriving the parameter using, as a reference region, a top neighboring region and a left neighboring region of the current block, a second mode for deriving the parameter using, as the reference region, a left neighboring region of the current block, or a third mode for deriving the parameter using, as the reference region, a top neighboring region of the current block, and
- wherein the left neighboring region of the second mode includes a sample line that is not adjacent to the current block, and the top neighboring region of the third mode includes a sample line that is not adjacent to the current block.
6 more elements
Dependencies are inferred from the claim text.