公开(公告)号：US11070797B2

公开(公告)日：2021-07-20

申请号：US16766982

申请日：2018-11-27

Applicant: LG ELECTRONICS INC.

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

IPC: H04N7/18 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182

Abstract: An image decoding method that is performed by a decoding apparatus according to the present disclosure comprises the steps of: forming a merge candidate list based on neighbouring blocks of a current block; deriving costs with respect to merge candidates included in the merge candidate list; deriving a revised merge candidate list based on the costs with respect to the merge candidates; deriving movement information of the current block based on the revised merge candidate list; and performing prediction on the current block based on the movement information, wherein the neighbouring blocks include spatial neighbouring blocks and temporal neighbouring blocks.

公开(公告)号：US20210144399A1

公开(公告)日：2021-05-13

申请号：US17124231

申请日：2020-12-16

Applicant: LG ELECTRONICS INC.

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

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

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：US10979738B2

公开(公告)日：2021-04-13

申请号：US16605447

申请日：2018-04-03

Applicant: LG ELECTRONICS INC.

Inventor： Junghak Nam ,  Seunghwan Kim ,  Hyeongmoon Jang ,  Jaehyun Lim

IPC: H04N19/64 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

Abstract: An image decoding method performed by means of a decoding device according to the present invention comprises the steps of: obtaining first split information relating to a first target block; if the first split information indicates that the first target block is to be split, splitting the first target block into first sub-blocks; obtaining MPT split information relating to a second target block which is one of the first sub-blocks of the first target block; splitting the second target block into second sub-blocks on the basis of the MPT split information; and decoding the second sub-blocks, wherein the second sub-blocks are non-square blocks.

公开(公告)号：US10917639B2

公开(公告)日：2021-02-09

申请号：US16324452

申请日：2017-02-07

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang ,  Junghak Nam ,  Jaehyun Lim ,  Jin Heo

IPC: H04N19/11 ,  H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/105

Abstract: Disclosed are an intra-prediction mode-based image processing method and a device therefor. Particularly, a method for processing an image on the basis of an intra-prediction mode may comprise the steps of: configuring a reference sample to be used for prediction of a current block on the basis of width information and height information of the current block when the current block is a non-square block; deriving an intra-prediction mode of the current block; and generating a prediction sample of the current block by using the reference sample on the basis of the intra-prediction mode of the current block.

公开(公告)号：US10911754B2

公开(公告)日：2021-02-02

申请号：US16818677

申请日：2020-03-13

Applicant: LG ELECTRONICS INC.

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

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

Abstract: 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.

公开(公告)号：US10728571B2

公开(公告)日：2020-07-28

申请号：US15750093

申请日：2016-07-15

Applicant: LG Electronics Inc.

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

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/105 ,  H04N19/517 ,  H04N19/503 ,  H04N19/182 ,  H04N19/159 ,  H04N19/44

Abstract: A video decoding method performed by a decoding device includes: deriving control points (CPs) for a current block; acquiring motion vectors for the CPs; deriving a sample-unit motion vector in the current block based on the acquired motion vectors; deriving a prediction sample for the current block based on the sample-unit motion vector; and generating a restoration sample based on the prediction sample, wherein coordinates of a bottom-right sample position of the current block are (0, 0), and coordinates of CPO among the CPs are (0, 0). Inter prediction is effectively performed through sample-unit motion vectors even when an image in a current block is planarly moved and variously changed, and since motion vectors for CPs are derived based on already-decoded neighboring blocks, an amount of information for the motion vectors for the CPs and for a residual signal for the current block is reduced, improving overall coding efficiency.

公开(公告)号：US20250106382A1

公开(公告)日：2025-03-27

申请号：US18727903

申请日：2023-01-13

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

Abstract: An image decoding/encoding method and apparatus according to the present disclosure may: derive a motion vector of a current block on the basis of a merge inter mode; correct the motion vector of the current block on the basis of any one of a directional matching-based correction method and a template matching-based correction method; and generate a prediction block of the current block on the basis of the corrected motion vector. Here, the motion vector of the current block may include a first motion vector in a first direction and a second motion vector in a second direction, the first motion vector may be derived on the basis of a first inter prediction mode, and the second motion vector may be derived on the basis of a second inter prediction mode.

公开(公告)号：US12231679B2

公开(公告)日：2025-02-18

申请号：US17431777

申请日：2020-03-04

Applicant: LG ELECTRONICS INC.

Inventor： Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/109 ,  H04N19/11 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/196 ,  H04N19/52

Abstract: According to the present disclosure of the present document, prediction can be performed on the basis of information related to the maximum number of block vector candidates included in a merge candidate list for the IBC merge mode, and thus information for IBC, which is distinguished from information used in inter prediction, can be signaled separately, and the efficiency of screen content coding (SCC) can be increased.

公开(公告)号：US12231626B2

公开(公告)日：2025-02-18

申请号：US18402182

申请日：2024-01-02

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Junghak Nam

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: According to the disclosure of this document, in subblock-based temporal motion vector prediction (sbTMVP), a subblock position for deriving a motion vector in units of a subblock can be efficiently calculated, and through this, video/image coding efficiency can be improved and hardware implementation can be simplified.

公开(公告)号：US12219147B2

公开(公告)日：2025-02-04

申请号：US18234208

申请日：2023-08-15

Applicant: LG ELECTRONICS INC.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

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

Abstract: According to embodiments of the present document, a prediction procedure can be performed for image video coding, and the prediction procedure can comprise merge mode motion vector differences (MMVD) and symmetric motion vector differences (SMVD) according inter prediction. The inter prediction can be performed on the basis of reference pictures of a current picture, and types of the reference pictures (e.g. a long-term reference picture, a short-term reference picture, etc.) can be considered for the inter prediction. Accordingly, performance and coding efficiency in the prediction procedure can be increased.