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.

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：US20230353733A1

公开(公告)日：2023-11-02

申请号：US18206499

申请日：2023-06-06

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Sangheon LEE

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/132 ,  H04N19/46 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/46 ,  H04N19/80

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise obtaining a reconstructed picture, determining a target boundary of deblocking filtering in the reconstructed picture, determining a boundary strength for the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength. Based on the target boundary being a transform block boundary and a color component of the reconstructed picture being a chroma component, the boundary strength may be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding may correspond to encoding residual samples for a chroma Cb component and a chroma Cr component as a single transform block.

公开(公告)号：US20230308674A1

公开(公告)日：2023-09-28

申请号：US18021599

申请日：2021-08-19

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Hyeong Moon JANG ,  Jaehyun LIM ,  Seung Hwan KIM

IPC: H04N19/46 ,  H04N19/172

CPC classification number: H04N19/46 ,  H04N19/172

Abstract: An image encoding/decoding method and apparatus are provided. The image encoding method comprises deriving information for a composite picture generated from one or more source pictures and generating a bitstream by encoding a single composite picture information (CPI) supplemental enhancement information (SEI) message including the information for the composite picture. The composite picture may comprise one or more patches obtained from the source pictures, the information for the composite picture may comprise first information for a source area corresponding to each of the patches in the source pictures and second information for a patch area covered by each of the patches in the composite picture, and each layer including the source pictures may be an output layer.

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：US20230082353A1

公开(公告)日：2023-03-16

申请号：US17987274

申请日：2022-11-15

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining whether to parse first information specifying whether a skip mode applies to a current block, determining whether to parse second information specifying whether an IBC (Intra Block Copy) mode applies to the current block, determining whether the IBC mode applies to the current block based on the first information and the second information, and deriving a prediction block of the current block based on whether to apply the IBC mode. Whether to parse the first information may be determined based on at least one of a width or height of the current block.

公开(公告)号：US20230047175A1

公开(公告)日：2023-02-16

申请号：US17968311

申请日：2022-10-18

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/109 ,  H04N19/186 ,  H04N19/70 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise determining prediction mode characteristic information based on a color format of a current block, determining a prediction mode type of a lower-layer block split from the current block based on the prediction mode characteristic information, obtaining the lower-layer block by splitting the current block based on the prediction mode type of the lower-layer block, and decoding the lower-layer block based on the prediction mode type of the lower-layer block. The prediction mode type of the lower-layer block comprises a first prediction mode type specifying that both an intra prediction mode and an inter prediction mode are available, a second prediction mode type specifying that only the intra prediction mode is available and a third prediction mode type specifying that only the inter prediction mode is available. Based on a first condition for the current block being satisfied, the prediction mode characteristic information has a first value, and the first condition comprises a case where a color format of the current block is a monochrome format or a 4:4:4 format. Based on the first condition for the current block being not satisfied, the prediction mode characteristic information has a second value or a third value based on at least one of a color format, split mode or size of the current block.