公开(公告)号：US11089312B2

公开(公告)日：2021-08-10

申请号：US16323488

申请日：2017-08-08

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Junghak Nam

IPC: H04N19/174 ,  H04N19/122 ,  H04N19/176 ,  H04N19/64 ,  H04N19/70 ,  H04N19/96 ,  G06T9/40

Abstract: The present invention relates to an image processing method and an apparatus therefor. Specifically, a method for decoding an image may comprise the steps of: decoding a first split flag indicating whether to split a first block using a binary tree structure; when the first split flag indicates that the first block is split, decoding split mode information indicating the direction in which the first block is split; checking whether a second block split from the first block is a square block, according to the split mode information; and when, as a result of the checking, it is determined that the second block is a square block, decoding a second split flag indicating whether to split the second block using a quad tree structure.

公开(公告)号：US10904561B2

公开(公告)日：2021-01-26

申请号：US16836248

申请日：2020-03-31

Applicant: LG ELECTRONICS INC.

Inventor： Jaeho Lee ,  Junghak Nam ,  Naeri Park ,  Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/19 ,  H04N19/176 ,  H04N19/119

Abstract: An image decoding method according to the present document includes obtaining motion prediction information for a current block from a bitstream, generating an affine MVP candidate list for the current block, deriving CPMVPs for CPs of the current block based on the affine MVP candidate list, deriving CPMVDs for the CPs of the current block based on the motion prediction information, deriving CPMVs for the CPs of the current block based on the CPMVPs and the CPMVDs, and deriving prediction samples for the current block based on the CPMVs.

公开(公告)号：US10812796B2

公开(公告)日：2020-10-20

申请号：US16337802

申请日：2017-08-30

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Hyeongmoon Jang ,  Sunmi Yoo

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/513 ,  H04N19/593

Abstract: The image decoding method performed by a decoding apparatus, according to the present invention, comprises the steps of: receiving intra prediction mode information of a current chroma block; deriving intra prediction candidate modes of the current chroma block on the basis of a neighboring chroma block of the current chroma block; deriving an intra prediction mode of the current chroma block on the basis of the intra prediction mode information and the intra prediction candidate modes; and predict the current chroma block on the basis of the intra prediction mode, wherein the intra prediction candidate modes include an intra prediction mode applied to a neighboring chroma block of the current chroma block.

公开(公告)号：US10547847B2

公开(公告)日：2020-01-28

申请号：US15761356

申请日：2016-03-03

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Jaehyun Lim ,  Seungwook Park ,  Sehoon Yea

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/51 ,  H04N19/517 ,  H04N19/52

Abstract: An image encoding method according to the present invention, which is performed by an encoding apparatus, comprises the steps of: generating an adaptive motion vector range (AMVR) enable flag; deriving a motion vector difference (MVD) with respect to a current block; deriving a representative MVD value of an MVD range including a value of the MVD from among a plurality of MVD ranges; generating a coded MVD corresponding to the representative MVD value; and outputting the AMVR enable flag and the coded MVD through a bit stream. According to the present invention, the amount of bits allocated to an MVD can be reduced and the overall coding efficiency can thus be increased.

公开(公告)号：US12289444B2

公开(公告)日：2025-04-29

申请号：US18386130

申请日：2023-11-01

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

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

Abstract: According to the disclosure of the present document, when the inter prediction type of a current block indicates bi-prediction, weight index information for candidates in a merge candidate list or a sub-block merge candidate list can be derived, and thus coding efficiency can be increased.

公开(公告)号：US12278982B2

公开(公告)日：2025-04-15

申请号：US18402108

申请日：2024-01-02

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Junghak Nam

IPC: 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：US12262048B2

公开(公告)日：2025-03-25

申请号：US18391106

申请日：2023-12-20

Applicant: LG ELECTRONICS INC.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/107 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573 ,  H04N19/70

Abstract: An image decoding method according to the present document may comprise the steps of: deriving an inter prediction mode from encoded information; configuring reference picture lists, deriving motion information comprising reference picture indexes for symmetric motion vector differences (SMVD); and generating prediction samples on the basis of the motion information, wherein the reference picture indexes for SMVD can be derived on the basis of short-term reference pictures included within the reference picture lists.

公开(公告)号：US12231650B2

公开(公告)日：2025-02-18

申请号：US18537723

申请日：2023-12-12

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

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

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes determining whether to use an advanced temporal motion vector predictor (ATMVP) candidate of sub-block unit for a current block, specifying a corresponding block corresponding to the current block in a reference picture based on a motion vector for a spatial neighboring block of the current block when the ATMVP candidate of the sub-block unit is used, deriving the ATMVP candidate of the sub-block unit for the current block based on motion vectors of sub-block unit of the corresponding block, constructing a merge candidate list including the ATMVP candidate of the sub-block unit for the current block, generating prediction samples of the current block by deriving motion vectors of the sub-block unit for the current block based on the merge candidate list and reconstructing a current picture based on the prediction samples of the current block.

公开(公告)号：US12212758B2

公开(公告)日：2025-01-28

申请号：US18525179

申请日：2023-11-30

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/186 ,  H04N19/46

Abstract: An image decoding method includes: deriving an L0 motion vector and a L1 motion vector of the current block; deriving prediction samples of the current block based on the L0 motion vector and the L1 motion vector; and generating reconstructed samples of the current block based on the prediction samples. Deriving the prediction samples includes applying bi-directional optical flow (BDOF) to the current block based on whether the condition for applying BDOF to the current block is satisfied, and the application condition of the BDOF includes a condition whereby the values of L0 luma weighted prediction flag information and L1 luma weighted prediction flag information are both zero, where the a value of each of the L0 luma weighted prediction flag information and L1 luma weighted prediction flag information being 0 represents that a weight factor for each of a L0 and L1 prediction luma components does not exist, respectively.

公开(公告)号：US12137215B2

公开(公告)日：2024-11-05

申请号：US17555052

申请日：2021-12-17

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Seunghwan Kim

IPC: H04N19/109 ,  H04N19/122 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/503 ,  H04N19/70

Abstract: A decoding method performed by a decoding device, according to the present document, may comprise the steps of: acquiring, from a bitstream, at least one of a combined inter-picture merge and intra-picture prediction (CIIP) enable flag and a coding unit (CU) skip flag indicating whether a skip mode is applied to a current block; acquiring, from the bitstream, a regular merge flag on the basis that a condition based on the current block size, and at least one of a condition based on the CIIP enable flag and a condition based on the CU skip flag are satisfied; generating prediction samples of the current block on the basis of the regular merge flag; and generating restoration samples on the basis of the prediction samples.