公开(公告)号：US20220116651A1

公开(公告)日：2022-04-14

申请号：US17559417

申请日：2021-12-22

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/139 ,  H04N19/109 ,  H04N19/176 ,  H04N19/172 ,  H04N19/105 ,  H04N19/132 ,  H04N19/573

Abstract: According to embodiments according to the present document, merge mode motion vector differences (MMVD) and symmetric motion vector differences (SMVD) may be performed on the basis of reference picture types and, in particular, short-term reference pictures may be used. Accordingly, prediction performance and coding efficiency in an inter prediction mode may be increased.

公开(公告)号：US20220103858A1

公开(公告)日：2022-03-31

申请号：US17545927

申请日：2021-12-08

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Junghak Nam

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/167 ,  H04N19/132 ,  H04N19/176

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

公开(公告)号：US20220103855A1

公开(公告)日：2022-03-31

申请号：US17546534

申请日：2021-12-09

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：US20220070498A1

公开(公告)日：2022-03-03

申请号：US17521726

申请日：2021-11-08

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Junghak Nam ,  Jaehyun Lim

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/52

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: decoding, on the basis of a bitstream, an affine flag that indicates whether affine prediction is applicable to a current block and a sub-block TMVP flag that indicates whether a temporal motion vector predictor based on a sub-block of the current block is usable; determining whether to decode a predetermined merge mode flag that indicates whether to apply a predetermined merge mode to the current block, on the basis of the decoded affine flag and the decoded sub-block TMVP flag; deriving prediction samples of the current block on the basis of the determining of whether to decode the predetermined merge mode flag; and generating reconstructed samples of the current block based on the prediction samples of the current block.

公开(公告)号：US11240495B2

公开(公告)日：2022-02-01

申请号：US16327192

申请日：2017-08-21

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang ,  Junghak Nam

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/14 ,  H04N19/86 ,  H04N19/119 ,  H04N19/182 ,  H04N19/186 ,  H04N19/96

Abstract: The present invention discloses an image coding/decoding method and an apparatus for the method. More specifically, a method for filtering an image by a decoding apparatus comprises deriving boundaries of a block divided into quad-tree plus binary-tree structure; determining an edge among boundaries of the block to which de-blocking filtering is applied; determining a type of de-blocking filtering to be applied to the edge; and performing de-blocking filtering to a picture sample restored according to the de-blocking filtering type, wherein the edge or the type of de-blocking filtering is determined by considering width or height of the block.

公开(公告)号：US11095905B2

公开(公告)日：2021-08-17

申请号：US16943338

申请日：2020-07-30

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/513 ,  H04N19/70

Abstract: Disclosed are a method for encoding a video signal and a device therefor. Specifically, a method for decoding an image based on an inter prediction mode comprises: generating a merging candidate list by using a spatial merge candidate and a temporal merge candidate of a current block; obtaining a merge index indicating a certain merge candidate in the merging candidate list; and generating a prediction block of the current block by using motion information of the certain merge candidate, wherein the generating of the merging candidate list may include adding a first merge candidate indicating a collocated block specified by motion information of the spatial merge candidate to the merging candidate list if a reference picture of the spatial merge candidate is same as a predetermined picture.

公开(公告)号：US11089309B2

公开(公告)日：2021-08-10

申请号：US16943908

申请日：2020-07-30

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/137 ,  H04N19/176 ,  H04N19/159 ,  H04N19/105 ,  H04N19/52

Abstract: Disclosed herein are a method for decoding a video signal and a device therefor. Specifically, a method for decoding an image based on an inter prediction mode may include: if a merge mode is applied to a current block, generating a merge candidate list by using a spatial neighboring block and a temporal neighboring block of the current block; obtaining a merge index indicating a candidate to be used for an inter prediction of the current block in the merge candidate list; deriving a motion vector of each of subblocks included in the current block based on a motion vector of the candidate used for the inter prediction of the current block; and generating a prediction sample of the current block by using the motion vector of each of subblocks.

公开(公告)号：US11082702B2

公开(公告)日：2021-08-03

申请号：US16628420

申请日：2018-03-14

Applicant: LG Electronics Inc.

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

IPC: H04N19/00 ,  H04N19/159 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

Abstract: Disclosed herein are an inter prediction mode-based image processing method and an apparatus therefor. Specifically, a method for processing an image based on an inter prediction mode may include: generating a temporary candidate list by using a spatial neighbor block or temporal neighbor block of a current block; calculating a cost for each candidate in the temporary candidate list by using a template of the current block; generating a final candidate list by rearranging candidates of the temporary candidate list based on the calculated cost; decoding a merge index indicating a specific candidate in the final candidate list; and generating a prediction block of the current block by using motion information of a candidate indicated by the merge index.

公开(公告)号：US11006109B2

公开(公告)日：2021-05-11

申请号：US16624734

申请日：2018-06-19

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: The present invention provides an image processing method on the basis of an intra prediction mode and an apparatus therefor. Specifically, a method for processing an image on the basis of an intra prediction mode may comprise the steps of: identifying whether weighted intra prediction is allowed for a current block and whether the weight intra prediction is applied to the current block; identifying whether reference sample filtering is applied to the current block when the weighted intra prediction is not allowed for the current block or when the weighted intra prediction is not applied to the current block; and performing reference sample filtering of reference samples neighboring the current block when the reference sample filtering is applied.

公开(公告)号：US10812795B2

公开(公告)日：2020-10-20

申请号：US16337125

申请日：2017-09-25

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang ,  Jin Heo

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/105 ,  H04N19/593 ,  H04N19/463

Abstract: A method and a device for processing an intra prediction mode based video are disclosed. More specifically, a method for processing a video based on an intra-prediction mode may include determining a left prediction mode and an upper prediction mode using a prediction mode of a block neighboring a current block, wherein the left prediction mode and the upper prediction mode are determined based on a split structure of the block neighboring the current block; constructing a most probable mode (MPM) candidate list of the current block using the left prediction mode and the upper prediction mode; determining a prediction mode of the current block using a MPM index indicating a specific prediction mode in the MPM candidate list; and generating a prediction block of the current block using the prediction mode of the current block.