公开(公告)号：US20230370642A1

公开(公告)日：2023-11-16

申请号：US18199785

申请日：2023-05-19

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jung Hak NAM

IPC: H04N19/61 ,  H04N19/167 ,  H04N19/11 ,  H04N19/122 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/61 ,  H04N19/11 ,  H04N19/119 ,  H04N19/122 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining a prediction mode of a current block, generating a prediction block of the current block based on intra block copy (IBC) prediction mode information, basede on the prediction mode of the current block being an IBC prediction mode, determining a size of a transform block of the current block based on a color component of the current block, generating a residual block of the current block based on the size of the transform block; and reconstructing the current block based on the prediction block and the residual block of the current block.

公开(公告)号：US20230353749A1

公开(公告)日：2023-11-02

申请号：US17782933

申请日：2020-12-04

Applicant: LG ELECTRONICS INC.

Inventor： Jung Hak NAM ,  Hendry HENDRY ,  Jaehyun LIM ,  Seung Hwan KIM

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method according to the present disclosure may comprise the steps of: deriving a temporal motion vector predictor for the current block on the basis of a co-located picture for the current block; deriving a motion vector of the current block on the basis of the temporal motion vector predictor; and generating a prediction block of the current block on the basis of the motion vector, wherein the co-located picture is determined on the basis of identification information of the co-located picture, which is included in a slice header of the current slice including the current block, and when the slice header does not include identification information of the co-located picture, the co-located picture is determined on the basis of identification information of the co-located picture, which is included in a picture header of the current picture including the current block.

公开(公告)号：US20230291915A1

公开(公告)日：2023-09-14

申请号：US18198170

申请日：2023-05-16

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Sunmi YOO ,  Jung Hak NAM

IPC: H04N19/186 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/96

CPC classification number: H04N19/186 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise obtaining palette information and palette index prediction information of a current block from a bitstream, based on a palette mode applying for the current block, constructing a palette predictor for the current block based on the palette information and constructing a palette table for the current block based on the palette predictor, generating a palette index map for the current block based on the palette index prediction information, and decoding the current block based on the palette table and the palette index map. The palette predictor may be selectively updated based on a split structure of the current block.

公开(公告)号：US20230089062A1

公开(公告)日：2023-03-23

申请号：US17970124

申请日：2022-10-20

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri PARK ,  Jung Hak NAM ,  Hyeong Moon JANG

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/513

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a prediction sample of a current block based on motion information of the current block, deriving a reference picture resampling (RPR) condition for the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block based on the RPR condition, and deriving a refined prediction sample for the current block by applying PROF to the current block.

公开(公告)号：US20220337814A1

公开(公告)日：2022-10-20

申请号：US17760676

申请日：2020-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Jangwon CHOI ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Moonmo KOO

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise determining an intra prediction mode of a current block, determining a reference sample based on the intra prediction mode and a neighboring sample of the current block, generating the prediction block based on the reference sample, and decoding the current block based on the prediction block. The reference sample may be determined by applying at least one of first filtering or second filtering to the neighboring sample value based on the intra prediction mode.

公开(公告)号：US20220210449A1

公开(公告)日：2022-06-30

申请号：US17697474

申请日：2022-03-17

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Sunmi YOO YOO ,  Jung Hak NAM

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/119 ,  H04N19/159 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise obtaining palette information and palette index prediction information of a current block from a bitstream, based on a palette mode applying for the current block, constructing a palette predictor for the current block based on the palette information and constructing a palette table for the current block based on the palette predictor, generating a palette index map for the current block based on the palette index prediction information, and decoding the current block based on the palette table and the palette index map, The palette predictor may be selectively updated based on a split structure of the current block.

公开(公告)号：US20220191535A1

公开(公告)日：2022-06-16

申请号：US17566962

申请日：2021-12-31

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri PARK ,  Jung Hak NAM ,  Hyeong Moon JANG

IPC: H04N19/51 ,  H04N19/176 ,  H04N19/159 ,  H04N19/137 ,  H04N19/105

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a constructed affine merge candidate of a current block, based on an inter prediction mode of the current block being an affine merge mode, constructing an affine merge candidate list including the constructed affine merge candidate, selecting an affine merge candidate of the current block based on the affine merge candidate list, generating a prediction block of the current block based on motion information of the selected affine merge candidate. The deriving the constructed affine merge candidate may comprise deriving a weight index of bi-prediction for the constructed affine merge candidate.

公开(公告)号：US20220182623A1

公开(公告)日：2022-06-09

申请号：US17437349

申请日：2020-03-13

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Nae Ri PARK ,  Jung Hak NAM

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96 ,  H04N19/593 ,  H04N19/159 ,  H04N19/137

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining whether predetermined splitting is allowed for a current block based on a size of the current block, obtaining information on splitting of the current block based on whether the predetermined splitting is allowed, splitting the current block based on the information on splitting of the current block, and decoding the current block. Whether the predetermined splitting is allowed may be determined based on whether a width or height of the current block is a predetermined sample length.

公开(公告)号：US20250063205A1

公开(公告)日：2025-02-20

申请号：US18818451

申请日：2024-08-28

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Seethal PALURI ,  Hendry HENDRY ,  Jung Hak NAM

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/86

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus comprises decoding a first flag specifying whether in-loop filtering is able to be performed across a boundary of a subpicture from a bitstream and performing the in-loop filtering on a boundary of a current block, based on the first flag. Based on the boundary of the current block being a boundary of a current subpicture including the current block, the in-loop filtering on the boundary of the current block is not performed, based on the first flag for the current subpicture specifying that the in-loop filtering is not able to be performed across the boundary of the current subpicture or the first flag for an adjacent subpicture adjacent to the boundary of the current block specifying that the in-loop filtering is not able to be performed across the boundary of the adjacent subpicture.

公开(公告)号：US20240430422A1

公开(公告)日：2024-12-26

申请号：US18825219

申请日：2024-09-05

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jung Hak NAM

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus comprises obtaining a current block corresponding to a leaf node of a split tree structure based on a predetermined prediction mode type, resetting a prediction mode type of the current block, obtaining prediction mode information of the current block based on the reset prediction mode type, and generating a prediction block of the current block based on the prediction mode information. The resetting the prediction mode type of the current block may be performed based on at least one of a slice type or size of the current block.