公开(公告)号：US12113975B2

公开(公告)日：2024-10-08

申请号：US17789939

申请日：2020-12-31

申请人： LG Electronics Inc.

发明人： Hyeong Moon Jang ,  Jung Hak Nam

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

CPC分类号： H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/96

摘要： 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.

公开(公告)号：US12058375B2

公开(公告)日：2024-08-06

申请号：US18199785

申请日：2023-05-19

申请人： LG ELECTRONICS INC.

发明人： Ling Li ,  Jung Hak Nam

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

CPC分类号： H04N19/61 ,  H04N19/11 ,  H04N19/119 ,  H04N19/122 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

摘要： 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, based 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：US12022083B2

公开(公告)日：2024-06-25

申请号：US18206547

申请日：2023-06-06

申请人： LG ELECTRONICS INC.

发明人： Ling Li ,  Jung Hak Nam

IPC分类号： H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

摘要： 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 inter prediction mode information, based on the prediction mode of the current block being an inter prediction mode, generating a residual block of the current block based on a transform block of the current block, and reconstructing the current block based on the prediction block and the residual block of the current bloc.

公开(公告)号：US20240171749A1

公开(公告)日：2024-05-23

申请号：US18429159

申请日：2024-01-31

申请人： LG ELECTRONICS INC.

发明人： Nae Ri PARK ,  Seung Hwan Kim ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC分类号： H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

CPC分类号： H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

摘要： 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 deriving a prediction sample of a current block based on motion information of the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block, deriving, based on that the PROF applies to the current block, a difference motion vector for each sample position in the current block, deriving a gradient for each sample position in the current block, deriving a PROF offset based on the difference motion vector and the gradient, and deriving a refined prediction sample for the current block based on the PROF offset.

公开(公告)号：US20220368891A1

公开(公告)日：2022-11-17

申请号：US17860547

申请日：2022-07-08

申请人： LG ELECTRONICS INC.

发明人： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC分类号： H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46

摘要： 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 constructing a merge candidate list for a current block based on a prediction mode of the current block, deriving motion information of the current block based on the merge candidate list, and generating a prediction block of the current block based on the motion information. Information on a maximum number of merge candidates included in the merge candidate list may be obtained through a sequence parameter set, and, based on the prediction mode being a subblock-based merge mode, the maximum number of merge candidates may be determined based on whether an affine mode is available for the current block.

公开(公告)号：US12003721B2

公开(公告)日：2024-06-04

申请号：US18209665

申请日：2023-06-14

申请人： LG ELECTRONICS INC.

发明人： Ling Li ,  Jung Hak Nam

IPC分类号： H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

摘要： An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include obtaining a current block by splitting an image, determining a prediction mode of the current block, generating an intra prediction block of the current block, based on the prediction mode of the current block being an intra prediction mode, generating a residual block of the current block, and reconstructing the current block based on the prediction block and the residual block of the current block.

公开(公告)号：US11792419B2

公开(公告)日：2023-10-17

申请号：US17677410

申请日：2022-02-22

申请人： LG Electronics Inc.

发明人： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC分类号： H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

CPC分类号： H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

摘要： 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 first flag specifying whether to perform weighted prediction on a current block and a weight index BcwIdx of bi-prediction with CU-level weight (BCW) for the current block, determining whether to perform default weighted prediction or explicit weighted prediction on the current block based on the first flag and BcwIdx, and generating a prediction block for the current block by performing the determined method.

公开(公告)号：US12096041B2

公开(公告)日：2024-09-17

申请号：US17766954

申请日：2020-10-06

申请人： LG ELECTRONICS INC.

发明人： Hyeong Moon Jang ,  Seethal Paluri ,  Hendry Hendry ,  Jung Hak Nam

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

CPC分类号： H04N19/82 ,  H04N19/117 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/86

摘要： 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：US12075043B2

公开(公告)日：2024-08-27

申请号：US17437349

申请日：2020-03-13

申请人： LG ELECTRONICS INC.

发明人： Hyeong Moon Jang ,  Nae Ri Park ,  Jung Hak Nam

IPC分类号： H04N7/12 ,  H04N19/119 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/96

CPC分类号： H04N19/119 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/96

摘要： 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：US12058342B2

公开(公告)日：2024-08-06

申请号：US17438003

申请日：2020-03-13

申请人： LG Electronics Inc.

发明人： Hyeong Moon Jang ,  Jung Hak Nam

IPC分类号： H04N19/105 ,  H04N19/119 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

CPC分类号： H04N19/159 ,  H04N19/105 ,  H04N19/119 ,  H04N19/137 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

摘要： An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure comprises determining whether a prediction mode of a current block is an intra block copy (IBC) mode based on information on the prediction mode of the current block, based on the prediction mode of the current block being an IBC mode, deriving motion information of the current block based on motion information of a corresponding block corresponding to the current block, and generating a prediction block for the current block, by performing IBC prediction based on the derived motion information of the current block. Based on absence of motion information of the corresponding block, the motion information of the current block is derived based on default motion information.