公开(公告)号：US20220086475A1

公开(公告)日：2022-03-17

申请号：US17420063

申请日：2020-01-08

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/513 ,  H04N19/577 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: determining whether a temporal motion information candidate is available for a current block; deriving motion information for the current block on the basis of whether the temporal motion information candidate is available; generating prediction samples for the current block on the basis of the motion information; and generating reconstruction samples on the basis of the prediction samples, wherein whether the temporal motion information candidate is available is determined on the basis of available flag information for the temporal motion information candidate, which indicates whether the temporal motion information candidate is available for inter prediction.

公开(公告)号：US11190790B2

公开(公告)日：2021-11-30

申请号：US17044536

申请日：2019-04-01

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/00 ,  H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: A method for parallel processing of color components of a video signal and an apparatus therefor are disclosed. Specifically, there is provided a method for decoding images based on an intra prediction mode, the method comprising: parsing a syntax element indicating whether a CCLM (cross-component linear model) intra prediction on a current chroma block is disabled or not; deriving an intra prediction mode applied to the current chroma block; and generating a prediction sample for the current chroma block based on the intra prediction mode, wherein, when the CCLM intra prediction is disabled, the intra prediction mode is derived in a predetermined first prediction mode set, when the CCLM intra prediction is not disabled, the intra prediction mode is derived in a predetermined second prediction mode set, and the second prediction mode set includes intra prediction modes included in the first prediction mode set and the CCLM intra prediction mode.

公开(公告)号：US11166036B2

公开(公告)日：2021-11-02

申请号：US16338344

申请日：2017-09-28

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Hyeongmoon Jang

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/46

Abstract: Disclosed are an image processing method and an apparatus therefor. Specifically, the image processing method comprises the steps of: obtaining an intra prediction mode; obtaining a reference sample using a neighboring sample of the current block; determining whether to perform filtering on the reference sample; filtering the reference sample if it is determined to perform the filtering; and generating a prediction block using the reference sample or the filtered reference sample on the basis of the prediction mode, wherein the current block is a non-square block, the reference sample comprises a left reference sample and a top reference sample, and whether to perform the filtering is determined on the basis of at least one of a current block parameter or a surrounding block parameter.

公开(公告)号：US11140409B2

公开(公告)日：2021-10-05

申请号：US16861579

申请日：2020-04-29

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/577 ,  H04N19/176 ,  H04N19/56 ,  H04N19/70 ,  H04N19/139

Abstract: A video decoding method includes deriving an L0 motion vector and an L1 motion vector for a current block; deriving a refined L0 motion vector and a refined L1 motion vector, by applying DMVR to the current block based on DMVR flag information; deriving L0 prediction samples of the current block based on the refined L0 motion vector and L1 prediction samples of the current block based on the refined L1 motion vector; deriving prediction samples for the current block based on the L0 prediction samples and the L1 prediction samples, by applying BDOF to the current block based on BDOF flag information; and generating reconstruction samples for the current block based on the prediction samples, in which the DMVR flag information is derived based on a predetermined DMVR application condition, and the BDOF flag information is derived based on a predetermined BDOF application condition.

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.