Video decoding method and device in video coding system
AssigneeLG Electronics Inc.
InventorsJungdong SEO, Jaehyun LIM
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Abstract
According to the present invention, a method by which a decoding device performs video decoding comprises the steps of: parsing a merge index of a current block; configuring a merge candidate list on the basis of neighboring blocks; selecting a merge candidate indicated by the merge index among merge candidates included in the merge candidate list; deriving L0 motion information and L1 motion information of the current block on the basis of the selected merge candidate; deriving an L0 weight and an L1 weight of the current block; and generating a prediction sample of the current block by weighted-summing an L0 reference sample and an L1 reference sample on the basis of the L0 weight and the L1 weight.
Claims15
An image decoding method performed by a decoding apparatus, the method comprising:
- parsing a merge index for a current block;
- configuring a merge candidate list based on neighboring blocks to the current block;
- selecting a merge candidate indicated by the merge index among merge candidates included in the merge candidate list;
- deriving L0 motion information and L1 motion information for the current block based on the selected merge candidate;
- deriving a L0 reference sample based on the L0 motion information;
- deriving a L1 reference sample based on the L1 motion information;
- deriving a L0 weight and a L1 weight for the current block;
- and
- weighted-summing the L0 reference sample and the L1 reference sample based on the L0 weight and the L1 weight to generate a predicted sample of the current block.
A decoding apparatus for decoding an image, wherein the device comprises:
- an entropy-decoder configured for parsing a merge index for a current block;
- and
- a predictor configured for:
- configuring a merge candidate list based on neighboring blocks to the current block;
- selecting a merge candidate indicated by the merge index among merge candidates included in the merge candidate list;
- deriving L0 motion information and L1 motion information about the current block based on the selected merge candidate;
- deriving a L0 reference sample based on the L0 motion information;
- deriving a L1 reference sample based on the L1 motion information;
- deriving a L0 weight and a L1 weight for the current block;
- and
- weighted-summing the L0 reference sample and the L1 reference sample based on the L0 weight and the L1 weight to generate a predicted sample of the current block.
Dependencies are inferred from the claim text.