公开(公告)号：US20240333976A1

公开(公告)日：2024-10-03

申请号：US18742676

申请日：2024-06-13

Applicant: LG ELECTRONICS INC.

Inventor： Ling Lee ,  Jung Hak NAM

IPC: H04N19/61 ,  H04N19/11 ,  H04N19/119 ,  H04N19/122 ,  H04N19/132 ,  H04N19/167 ,  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, 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：US20230412830A1

公开(公告)日：2023-12-21

申请号：US18242408

申请日：2023-09-05

Applicant: LG Electronics Inc.

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

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

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

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 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：US20230353743A1

公开(公告)日：2023-11-02

申请号：US18206547

申请日：2023-06-06

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jung Hak NAM

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

CPC classification number: H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  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 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：US20230080116A1

公开(公告)日：2023-03-16

申请号：US17797953

申请日：2021-02-15

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/119 ,  H04N19/117 ,  H04N19/172 ,  H04N19/46

Abstract: An image coding/decoding method and device are provided. The image decoding method carried out by the image decoding device, according to the present disclosure, may comprise the steps of: determining the number of tiles in a current picture on the basis that the segmentation of the current picture is not restricted; on the basis that the number of tiles in the current picture is a plurality, acquiring from a bitstream, a first flag representing whether tile boundary filtering is available; and, on the basis of the value of the first flag, determining whether to carry out filtering for the boundaries of the tiles belonging to the current picture.

公开(公告)号：US20220337842A1

公开(公告)日：2022-10-20

申请号：US17639837

申请日：2020-09-09

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/137 ,  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 deriving a prediction sample of a current block based on motion information of the current block, determining whether bi-directional optical flow (BDOF) applies to the current block, based on that the BDOF applies to the current block, deriving a gradient for a current subblock in the current block, deriving motion refinement (vx, vy) for the current subblock based on the gradient, deriving a BDOF offset based on the gradient and the motion refinement, and deriving a refined prediction sample for the current block based on the prediction sample of the current block and the BDOF offset.

公开(公告)号：US20220279163A1

公开(公告)日：2022-09-01

申请号：US17636911

申请日：2020-08-20

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/14 ,  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 comprises deriving a prediction mode of a current block, constructing a merge candidate list for the current block, based on the prediction mode of the current block being a triangle partition mode (TPM), deriving motion information of two partitions of the current block based on the merge candidate list and two merge indices of the current block signaled through a bitstream, generating a prediction block of the current block based on the motion information, storing motion information of the current block, and updating a history-based motion vector predictor (HMVP) buffer based on the motion information of the current block.

公开(公告)号：US20220174321A1

公开(公告)日：2022-06-02

申请号：US17562389

申请日：2021-12-27

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jung Hak NAM

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

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, 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：US20250030851A1

公开(公告)日：2025-01-23

申请号：US18775661

申请日：2024-07-17

Applicant: LG ELECTRONICS INC.

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

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

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：US20240244213A1

公开(公告)日：2024-07-18

申请号：US18417903

申请日：2024-01-19

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

CPC classification number: 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：US20230388512A1

公开(公告)日：2023-11-30

申请号：US18232125

申请日：2023-08-09

Applicant: LG Electronics Inc.

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

IPC: H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

CPC classification number: H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure comprises determining whether to apply intra prediction to a current chroma block based on information on prediction of the current chroma block, deriving an intra prediction mode of the current chroma block based on an intra prediction mode of a corresponding luma block corresponding to the current chroma block and intra chroma prediction mode information of the current chroma block, when intra prediction applies to the current chroma block, and generating a prediction block of the current chroma block, by performing intra prediction based on the intra prediction mode of the current chroma block. When the intra prediction mode of the corresponding luma block is not present, the intra prediction mode of the current chroma block is derived based on a default intra prediction mode.