公开(公告)号：US20240422323A1

公开(公告)日：2024-12-19

申请号：US18821525

申请日：2024-08-30

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：US20240380884A1

公开(公告)日：2024-11-14

申请号：US18285957

申请日：2022-04-08

Applicant: LG Electronics Inc.

Inventor： Nae Ri PARK ,  Jaehyun LIM ,  Sunmi YOO ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Jangwon CHOI ,  Seung Hwan KIM

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method is performed by the image decoding apparatus and comprises generating a first prediction sample for a current block based on a first intra prediction mode, generating a second prediction sample for the current block based on a second intra prediction mode, and generating a prediction block for the current block based on the first prediction sample and the second prediction sample. The prediction block may be generated by respectively applying a first weight and a second weight to the first prediction sample and the second prediction sample.

公开(公告)号：US20230328238A1

公开(公告)日：2023-10-12

申请号：US18209665

申请日：2023-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jung Hak NAM

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

CPC classification number: H04N19/119 ,  H04N19/132 ,  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 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：US20230300350A1

公开(公告)日：2023-09-21

申请号：US18009248

申请日：2021-06-09

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/184 ,  H04N19/189 ,  H04N19/105 ,  H04N19/159 ,  H04N19/30

CPC classification number: H04N19/184 ,  H04N19/189 ,  H04N19/105 ,  H04N19/159 ,  H04N19/30

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method performed by the image decoding apparatus according to the present disclosure may include: obtaining, from a bitstream, maximum temporal identifier information indicating a maximum temporal identifier of a reference layer which is referred to for inter-layer prediction of a current layer; and performing, based on the maximum temporal identifier information, a sub-bitstream extraction process from the bitstream, wherein, in the sub-bitstream extraction process, among parameter sets of the reference layer, a parameter set not referred to for the inter-layer prediction of the current layer may be removed from the bitstream.

公开(公告)号：US20230188714A1

公开(公告)日：2023-06-15

申请号：US17925782

申请日：2021-06-09

Applicant: LG ELECTRONICS INC

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

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/82 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus for signaling an identifier for an APS and a method of transmitting a bitstream are provided. The image decoding method according to the present disclosure may comprise obtaining adaptive parameter set (APS) parameter type information specifying an APS parameter type signaled by an APS, obtaining APS identifier information specifying the APS after obtaining the APS parameter type information, and reconstructing an image based on the APS identifier information.

公开(公告)号：US20220286689A1

公开(公告)日：2022-09-08

申请号：US17630028

申请日：2020-08-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/137 ,  H04N19/105 ,  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 comprises determining an inter prediction technique applying to a current block based on a prediction mode of the current block being an inter prediction mode, deriving a motion information candidate of the current block based on a type of the determined inter prediction technique, deriving motion information of the current block based on motion information of the derived motion information candidate, and generating a prediction block for the current block by performing inter prediction on the current block based on the motion information of the current block. The motion information candidate may comprise an interpolation filter index.

公开(公告)号：US20220182606A1

公开(公告)日：2022-06-09

申请号：US17564640

申请日：2021-12-29

Applicant: LG Electronics Inc.

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

IPC: H04N19/105 ,  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 may comprise constructing an affine merge candidate list for a current block, based on an inter prediction mode of the current block being an affine merge mode, selecting one affine merge candidate from the affine merge candidate list, deriving motion information of the current block based on motion information of the selected affine merge candidate, generating a prediction block of the current block based on the motion information of the current block, and reconstructing the current block based on the prediction block of the current block. The constructing the affine merge candidate list may comprise deriving a constructed affine merge candidate, and the deriving the constructed affine merge candidate may comprise deriving a weight index for bi-prediction of the constructed affine merge candidate.

公开(公告)号：US20220174278A1

公开(公告)日：2022-06-02

申请号：US17562315

申请日：2021-12-27

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jung Hak NAM

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

Abstract: 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：US20220078420A1

公开(公告)日：2022-03-10

申请号：US17472137

申请日：2021-09-10

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jin HEO ,  Moonmo KOO ,  Jung Hak NAM

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include determining whether a prediction mode of a current block is an intra prediction mode based on information on the prediction mode of the current block, determining whether intra sub-partitions (ISP) is available for the current block, when the prediction mode of the current block is an intra prediction mode, decoding an ISP application indicator indicating whether to apply ISP to the current block, when ISP is available for the current block, and generating a prediction block for the current block by applying ISP to the current block, upon determining that ISP applies to the current block based on the ISP application indicator.

公开(公告)号：US20250080754A1

公开(公告)日：2025-03-06

申请号：US18293202

申请日：2022-08-18

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jaehyun LIM ,  Nae Ri PARK ,  Sunmi YOO ,  Jung Hak NAM ,  Hyeong Moon JANG

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

Abstract: Provided are an image encoding/decoding method and apparatus. An image decoding method performed by an image decoding apparatus may comprise determining an intra prediction mode of a current block, performing planar intra prediction based on the intra prediction mode being a planar prediction mode and obtaining a reconstructed sample of the current block based on a prediction sample obtained based on the planar intra prediction. The performing the planar intra prediction may comprise applying filtering to an intra prediction reference sample of the current block.