公开(公告)号：US11277607B2

公开(公告)日：2022-03-15

申请号：US17215316

申请日：2021-03-29

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/85 ,  H04N19/132

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: constructing an AMVP candidate list comprising at least one AMVP candidate for a current block; deriving an HMVP candidate list for the current block that includes HMVP candidates for the current block; selecting at least one HMVP candidate among the HMVP candidates in the HMVP candidate list; deriving an updated AMVP candidate list by adding the at least one HMVP candidate to the AMVP candidate list; deriving motion information for the current block on the basis of the updated AMVP candidate list; deriving prediction samples for the current block on the basis of the motion information for the current block; and generating reconstruction samples for the current block on the basis of the prediction samples for the current block.

公开(公告)号：US11272221B2

公开(公告)日：2022-03-08

申请号：US17073047

申请日：2020-10-16

Applicant: LG Electronics Inc.

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

IPC: H04N19/00 ,  H04N19/96 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70

Abstract: Disclosed are a method for decoding a video signal and an apparatus therefor. Specifically, a method for decoding an image may include: partitioning a current coding tree block into a plurality of coding blocks so that coding blocks partitioned from the current coding tree block are included in a current picture when the current coding tree block is out of a boundary of the current picture; parsing a first syntax element indicating whether a current coding block is partitioned into a plurality of subblocks when the current coding block satisfies a predetermined condition; and determining a split mode of the current coding block based on the syntax element.

公开(公告)号：US11252432B2

公开(公告)日：2022-02-15

申请号：US17060582

申请日：2020-10-01

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Junghak Nam ,  Naeri Park

IPC: H04N11/02 ,  H04N19/513 ,  H04N19/109 ,  H04N19/136 ,  H04N19/176 ,  H04N19/587 ,  H04N19/70

Abstract: In the present disclosure, a method of decoding a video signal and a device therefor are disclosed. Specifically, a method of decoding an image based on an inter prediction mode includes deriving a motion vector of an available spatial neighboring block around a current block; deriving a collocated block of the current block based on the motion vector of the spatial neighboring block; deriving a motion vector in a sub-block unit in the current block based on a motion vector of the collocated block; and generating a prediction block of the current block using the motion vector derived in the sub-block unit, wherein the collocated block may be specified by the motion vector of the spatial neighboring block in one pre-defined reference picture.

公开(公告)号：US20220030266A1

公开(公告)日：2022-01-27

申请号：US17411688

申请日：2021-08-25

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/577 ,  H04N19/176

Abstract: A video decoding method according to this disclosure 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：US11234003B2

公开(公告)日：2022-01-25

申请号：US16319637

申请日：2016-07-26

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Junghak Nam

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/70 ,  H04N19/593 ,  H04N19/107 ,  H04N19/91

Abstract: An intra-prediction method according to the present invention comprises the steps of: acquiring intra-prediction mode information from a bitstream; deriving neighboring reference samples of a current block; determining an intra-directional mode for the current block; deriving a predicted block for the current block based on the intra-directional mode and the neighboring reference samples; deriving template reference samples based on the neighboring reference samples; a template reference block based on the template reference samples; and generating a modified predicted block based on the predicted block and the template reference block. The present invention can generate a modified predicted block based on an intra-predicted block and a template reference block, thereby improving the intra-prediction performance.

公开(公告)号：US11206430B2

公开(公告)日：2021-12-21

申请号：US17219184

申请日：2021-03-31

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：US11134247B2

公开(公告)日：2021-09-28

申请号：US16341002

申请日：2017-09-29

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Junghak Nam

IPC: H04N19/117 ,  H04N19/182 ,  H04N19/70

Abstract: Disclosed in the present invention are an image processing method and an apparatus therefor. Specifically, the image processing method can comprise the steps of: extracting encoded image data from a bitstream received from an encoder; decoding the encoded image data so as to generate a reconstructed image; determining a category of a current pixel by comparing a pixel value of the current pixel in the reconstructed image with pixel values of neighboring pixels of the current pixel; generating an offset applied to the current pixel on the basis of a difference value between pixel values of pixels, determined according to the category, among the neighboring pixels and the pixel value of the current pixel; and compensating for the current pixel by adding the offset to the pixel value of the current pixel.

公开(公告)号：US20210266560A1

公开(公告)日：2021-08-26

申请号：US17260739

申请日：2019-07-17

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

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

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：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.