公开(公告)号：US11936916B2

公开(公告)日：2024-03-19

申请号：US17611098

申请日：2020-06-25

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/82 ,  H04N19/124 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/82 ,  H04N19/124 ,  H04N19/176 ,  H04N19/70

Abstract: According to a disclosure of the present document, coding efficiency and complexity of residual coding may be improved on the basis of a determination regarding whether or not lossless coding is used.

公开(公告)号：US11936878B2

公开(公告)日：2024-03-19

申请号：US17959001

申请日：2022-10-03

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: An image decoding method includes: deriving a refined L0 motion vector and a refined L1 motion vector by applying decoder-side motion vector refinement (DMVR) based on an L0 motion vector and an L1 motion vector of a current block, deriving prediction samples for the current block based on L0 prediction samples derived based on the refined L0 motion vector and L1 prediction samples derived based on the refined L1 motion vector, and generating reconstructed samples for the current block based on the prediction samples. The L0 prediction samples are derived based on an L0 reference picture and the refined L0 motion vector, and the L1 prediction samples are derived based on an L1 reference picture and the refined L1 motion vector, and deriving the prediction samples comprises determining whether to apply bi-directional optical flow (BDOF) process based on a first POC difference and a second POC difference are the same.

公开(公告)号：US11910002B2

公开(公告)日：2024-02-20

申请号：US17950390

申请日：2022-09-22

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Junghak Nam

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/587

CPC classification number: H04N19/513 ,  H04N19/176 ,  H04N19/587

Abstract: According to the disclosure of the present document, a subblock position for deriving a subblock unit motion vector in a subblock-based temporal motion vector prediction (sbTMVP) can be efficiently calculated, thereby enabling video/image coding efficiency to increase and a simplifying effect for hardware implementation to be obtained.

公开(公告)号：US11902569B2

公开(公告)日：2024-02-13

申请号：US17957916

申请日：2022-09-30

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang ,  Eunyong Son ,  Moonmo Koo ,  Seungwook Park ,  Yongjoon Jeon

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/124 ,  H04N19/503 ,  H04N19/105 ,  H04N19/70 ,  H04N19/182 ,  H04N19/513 ,  H04N19/66 ,  H04N19/91

CPC classification number: H04N19/56 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182 ,  H04N19/503 ,  H04N19/513 ,  H04N19/66 ,  H04N19/70 ,  H04N19/91

Abstract: A video decoding method performed by a decoding apparatus includes the steps of: deriving control points (CP) for a current block; acquiring movement vectors for the CPs; deriving a sample unit movement vector in the current block on the basis of the acquired movement vectors; and deriving a prediction sample for the current block on the basis of the sample unit movement vector. According to the present invention, it is possible to effectively perform, through sample unit motion vectors, inter-prediction not only in a case where an image in the current block is plane-shifted but also in a case where there are various image distortions.

公开(公告)号：US11876957B2

公开(公告)日：2024-01-16

申请号：US17413419

申请日：2019-12-18

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Junghak Nam

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/573 ,  H04N19/577

CPC classification number: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/573 ,  H04N19/577

Abstract: A video processing method according to an embodiment of the present disclosure includes obtaining motion information and bi-directional prediction weight information for inter prediction of a current block, deriving a prediction sample of the current block based on the motion information and the bi-directional prediction weight information, and updating an HMVP candidate list based on a history-based motion vector predictor (HMVP) candidate including the motion information and the bi-directional prediction weight information. The motion information includes a first reference index and a first motion vector related to a first reference picture and a second reference index and a second motion vector related to a second reference picture. The bi-directional prediction weight information may be used to derive a first weight value applied to a first prediction sample from the first reference picture and a second weight value applied to a second prediction sample from the second reference picture.

公开(公告)号：US11871029B2

公开(公告)日：2024-01-09

申请号：US17887911

申请日：2022-08-15

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang ,  Junghak Nam ,  Jaehyun Lim

IPC: H04N19/52 ,  H04N19/132 ,  H04N19/176 ,  H04N19/31 ,  H04N19/55

CPC classification number: H04N19/52 ,  H04N19/132 ,  H04N19/176 ,  H04N19/31 ,  H04N19/55

Abstract: A method for image decoding performed by a decoding apparatus according to the present disclosure comprises the steps of: deriving an ATMVP candidate for a current block; deriving merge candidates for the current block; deriving prediction samples for the current block on the basis of the merge candidates and the ATMVP candidate; and deriving reconstruction samples for the current block on the basis of the prediction samples, wherein the ATMVP candidate is a spatial neighboring block spatially adjacent to the current block.

公开(公告)号：US11843779B2

公开(公告)日：2023-12-12

申请号：US17674765

申请日：2022-02-17

Applicant: LG Electronics Inc.

Inventor： Ling Li ,  Jaehyun Lim ,  Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/46 ,  H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: A video decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: receiving a bitstream including information about merge data of a current block; checking mh intra flag information for mh intra prediction which is included in the information about the merge data; checking information about a merge triangle prediction on the basis of a checking result that a value of the mh intra flag information is related to checking the information about the merge triangle prediction included in the information about the merge data; deriving prediction samples for the current block on the basis of a result of checking the information about the merge triangle prediction; and generating a reconstructed picture on the basis of the prediction samples.

公开(公告)号：US11831908B1

公开(公告)日：2023-11-28

申请号：US17963394

申请日：2022-10-11

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/527 ,  H04N19/577 ,  H04N19/109 ,  H04N19/139 ,  H04N19/52

CPC classification number: H04N19/577 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52

Abstract: According to a disclosure of the present document, when the type of inter-prediction of a current block is indicated as biprediction, weight index information for a candidate within a merge candidate list or a sub-block merge candidate list may be derived, and coding efficiency may be increased.

公开(公告)号：US11800112B2

公开(公告)日：2023-10-24

申请号：US17555264

申请日：2021-12-17

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Seunghwan Kim

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: An image encoding method may include acquiring image information including inter prediction mode information and residual information through a bitstream, generating residual samples based on the residual information, generating prediction samples of a current block by applying a prediction mode determined based on the inter prediction mode information, and generating reconstructed samples based on the prediction samples and the residual samples. Based on a CIIP mode being not enabled, a partitioning prediction mode in which prediction is performed by dividing the current block into two partitions being not enabled, a value of the first flag for a subblock merge mode being equal to 0 and a value of the third flag for a MMVD being equal to 0, the inter prediction mode information includes merge index information indicating one of merge candidates included in a merge candidate list generated for the regular merge mode.

公开(公告)号：US11800089B2

公开(公告)日：2023-10-24

申请号：US17414893

申请日：2020-01-02

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Junghak Nam

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/513

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513

Abstract: A method by which a decoding device performs image decoding, according to the present document, comprises the steps of: deriving a reference block on the basis of a motion shift; determining whether a subblock temporal motion vector predictor (sbTMVP) candidate is available, on the basis of whether the reference block is a current picture referencing (CPR) block; deriving motion information about a current block on the basis of the sbTMVP candidate when the sbTMVP candidate is available; generating prediction samples on the basis of the motion information; and generating a restored picture on the basis of the prediction samples, wherein the sbTMVP candidate is determined to be unavailable with respect to the reference block which is the CPR block.