公开(公告)号：US12081738B2

公开(公告)日：2024-09-03

申请号：US18104477

申请日：2023-02-01

申请人： LG ELECTRONICS INC.

发明人： Jaeho Lee

IPC分类号： H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

CPC分类号： H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

摘要： Disclosed is an inter prediction method which includes deriving control points (CPs) for the current block, wherein the CPs include a first CP and a second CP, deriving a first motion vector predictor (MVP) for the first CP and a second MVP for the second CP based on neighboring blocks of the current block, decoding a first motion vector difference (MVD) for the first CP, decoding a difference of two MVDs (DMVD) for the second CP, deriving a first motion vector (MV) for the first CP based on the first MVP and the first MVD, deriving a second MV for the second CP based on the second MVP and the DMVD for the second CP, and generating a predicted block for the current block based on the first MV and the second MV.

公开(公告)号：US12022109B2

公开(公告)日：2024-06-25

申请号：US18128757

申请日：2023-03-30

申请人： LG Electronics Inc.

发明人： Jaeho Lee ,  Seunghwan Kim

IPC分类号： H04N19/52 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/463 ,  H04N19/513 ,  H04N19/577

CPC分类号： H04N19/52 ,  H04N19/132 ,  H04N19/139 ,  H04N19/577

摘要： An image decoding method performed by a decoding device according to the present disclosure comprises: a step of deriving reference picture list 0 (L0) and reference picture list 1 (L1); a step of deriving two motion vectors (MV) for a current block, the two MVs including MVL0 for the L0 and MVL1 for the L1; a step of determining whether to apply bi-prediction optical flow (BIO) prediction for deriving refined motion vectors by sub-blocks to the current block; a step of deriving a refined motion vector for a sub-block of the current block based on the MVL0 and MVL1, if the BIO prediction is applied to the current block; and a step of deriving a prediction sample based on the refined motion vector.

公开(公告)号：US12003708B2

公开(公告)日：2024-06-04

申请号：US18091933

申请日：2022-12-30

申请人： LG ELECTRONICS INC.

发明人： Sunmi Yoo ,  Jaeho Lee ,  Jangwon Choi ,  Jungdong Seo ,  Jin Heo

IPC分类号： H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

CPC分类号： H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

摘要： A method by which a decoding device performs image decoding, according to the present invention, comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring samples including left neighboring samples and upper neighboring samples of the current block; deriving reference samples for prediction of a target sample among the neighboring samples on the basis of the position of the target sample of the current block and the prediction angle of the intra prediction mode; determining an interpolation filter for the target sample; and deriving the prediction sample of the target sample on the basis of the interpolation filter and the reference samples.

公开(公告)号：US11943470B2

公开(公告)日：2024-03-26

申请号：US18114791

申请日：2023-02-27

申请人： LG ELECTRONICS INC.

发明人： Jaeho Lee

IPC分类号： H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/573 ,  H04N19/70

CPC分类号： H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/573 ,  H04N19/70

摘要： The present disclosure relates to a method by which a decoding apparatus performs video coding, comprising the steps of: generating a motion information candidate list for a current block; selecting one candidate from among those included in the motion information candidate list; deriving control point motion vectors (CPMVs) of the current block based on the selected candidate; deriving sub-block-unit or sample-unit motion vectors of the current block based on the CPMVs; deriving a predicted block based on the motion vectors; and reconstructing a current picture based on the predicted block, wherein the motion information candidate list includes an inherited affine candidate, the inherited affine candidate is derived based on candidate blocks coded by affine prediction, from among spatial neighboring blocks of the current block, and the inherited affine candidate is generated up to a pre-defined maximum number.

公开(公告)号：US11849143B2

公开(公告)日：2023-12-19

申请号：US16798087

申请日：2020-02-21

申请人： LG ELECTRONICS INC.

发明人： Jaeho Lee ,  Seunghwan Kim

IPC分类号： H04N19/90 ,  H04N19/573 ,  H04N19/176 ,  H04N19/52

CPC分类号： H04N19/573 ,  H04N19/176 ,  H04N19/52

摘要： An image decoding method performed by a decoding apparatus according to the present document includes constituting a candidate list for deriving motion information of a sub-block unit for a current block, wherein the merge candidate list includes constructed candidates; deriving control point motion vectors (CPMVs) for control points (CPs) of the current block based on the merge candidate list; deriving prediction samples for the current block based on the CPMVs; and generating a reconstructed picture for the current block based on the derived prediction samples, wherein the constructed candidates are derived based on combination of at least two of a first neighboring block in a first group, a second neighboring block in a second group, a third neighboring block in a third group and a fourth neighboring block, and the first neighboring block, the second neighboring block and the third neighboring block and the fourth neighboring block constituting the combination have the same reference picture index.

公开(公告)号：US11736707B2

公开(公告)日：2023-08-22

申请号：US17363648

申请日：2021-06-30

申请人： LG ELECTRONICS INC.

发明人： Jaeho Lee

IPC分类号： H04N19/44 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

CPC分类号： H04N19/44 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

摘要： The present disclosure provides a method for decoding a video signal including a current block based on an affine motion prediction mode (affine mode, AF mode), the method including: checking whether the AF mode is applied to the current block, the AF mode representing a motion prediction mode using an affine motion model; checking whether an AF4 mode is used when the AF mode is applied to the current block, the AF4 mode representing a mode in which a motion vector is predicted using four parameters constituting the affine motion model; generating a motion vector predictor using the four parameters when the AF4 mode is used and generating a motion vector predictor using six parameters constituting the affine motion model when the AF4 mode is not used; and obtaining a motion vector of the current block based on the motion vector predictor.

公开(公告)号：US11601643B2

公开(公告)日：2023-03-07

申请号：US17373153

申请日：2021-07-12

申请人： LG ELECTRONICS INC.

发明人： Jaeho Lee

IPC分类号： H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/105

摘要： Disclosed is an inter prediction method which includes deriving control points (CPs) for the current block, wherein the CPs include a first CP and a second CP, deriving a first motion vector predictor (MVP) for the first CP and a second MVP for the second CP based on neighboring blocks of the current block, decoding a first motion vector difference (MVD) for the first CP, decoding a difference of two MVDs (DMVD) for the second CP, deriving a first motion vector (MV) for the first CP based on the first MVP and the first MVD, deriving a second MV for the second CP based on the second MVP and the DMVD for the second CP, and generating a predicted block for the current block based on the first MV and the second MV.

公开(公告)号：US11259041B2

公开(公告)日：2022-02-22

申请号：US17190849

申请日：2021-03-03

申请人： LG Electronics Inc.

发明人： Jaeho Lee

IPC分类号： H04N19/52 ,  H04N19/176 ,  H04N19/184

摘要： An image decoding method performed by a decoding apparatus includes the steps of: acquiring motion prediction information on a current block from a bitstream; generating an affine MVP candidate list including affine motion vector predictor candidates for the current block; deriving CPMVPs for CPs of the current block on the basis of one affine MVP candidate among the affine MVP candidates included in the affine MVP candidate list; deriving CPMVDs for the CPs of the current block on the basis of the motion prediction information; deriving CPMVs for the CPs of the current block on the basis of the CPMVPs and the CPMVDs; and deriving prediction samples for the current block on the basis of the CPMVs.

公开(公告)号：US11240527B2

公开(公告)日：2022-02-01

申请号：US16861787

申请日：2020-04-29

申请人： LG ELECTRONICS INC.

发明人： Jaeho Lee

IPC分类号： H04N19/105 ,  H04N19/52 ,  H04N19/124 ,  H04N19/176

摘要： An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: obtaining motion prediction information relating to a current block from a bitstream; generating an affine MVP candidate list for the current block; deriving CPMVPs for CPs of the current block on the basis of the affine MVP candidate list; deriving CPMVDs for the CPs of the current block on the basis of the motion prediction information; deriving CPMVs for the CPs of the current block on the basis of the CPMVPs and the CPMVDs; and deriving prediction samples for the current block on the basis of the CPMVs.

公开(公告)号：US20210120236A1

公开(公告)日：2021-04-22

申请号：US17138245

申请日：2020-12-30

申请人： LG ELECTRONICS INC.

发明人： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang ,  Jaeho Lee

IPC分类号： H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/423 ,  H04N19/533 ,  H04N19/70

摘要： According to an embodiment disclosed in the present specification, a history-based motion vector prediction (HMVP) candidate set with respect to a current block may be derived based on a history, the HMVP candidate set may be updated or initialized according to a condition, and motion information of the current block may be derived based on the HMVP candidate set, through which inter prediction efficiency can be improved.