公开(公告)号：US11490111B2

公开(公告)日：2022-11-01

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：US11483553B2

公开(公告)日：2022-10-25

申请号：US17560722

申请日：2021-12-23

Applicant: LG ELECTRONICS INC.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/105 ,  H04N19/51 ,  H04N19/573 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52

Abstract: According to the disclosure of the present document, weight index information for sub-block merge candidates of a current block can be derived and coding efficiency can be increased.

公开(公告)号：US11477475B2

公开(公告)日：2022-10-18

申请号：US17065822

申请日：2020-10-08

Applicant: LG ELECTRONICS INC.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/513 ,  H04N19/44

Abstract: An image decoding method according to the present disclosure includes deriving a history-based motion vector prediction (HMVP) buffer for a current block, deriving motion information of the current block based on an HMVP candidate included in the HMVP buffer, generating prediction samples for the current block based on the motion information, and generating reconstructed samples based on the prediction samples, and the HMVP buffer is initialized when processing a first-ordered CTU in a CTU row in which a current CTU is located, and the current block is included in the current CTU.

公开(公告)号：US11470325B2

公开(公告)日：2022-10-11

申请号：US17572329

申请日：2022-01-10

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Jaehyun Lim ,  Junghak Nam

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82

Abstract: A method for decoding an image, according to the present document, comprises: receiving a bitstream including BDPCM information; deriving residual samples for a current block on the basis of the BDPCM information; deriving prediction samples for the current block on the basis of the BDPCM information; generating a reconstructed picture on the basis of the residual samples and the prediction samples; and performing deblocking filtering on the reconstructed picture, wherein when BDPCM is applied to the current block, the deblocking filtering is not performed.

公开(公告)号：US11438579B2

公开(公告)日：2022-09-06

申请号：US17257169

申请日：2019-07-02

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Seunghwan Kim ,  Junghak Nam ,  Sunmi Yoo ,  Ling Li ,  Jaehyun Lim ,  Jangwon Choi ,  Jungah Choi

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/423 ,  H04N19/44

Abstract: Embodiments of the present disclosure provide a method and an apparatus for processing a video signal through intra prediction. A method for processing a video signal according to an embodiment of the present disclosure may include: checking that intra prediction is applied to a current block including a current sample to be predicted; determining a first reference sample value on a first reference location from at least one of samples positioned at an upper horizontal line and a left vertical line adjacent to the current block, based on an intra-prediction direction of the current block; determining a second reference sample value on a second reference location positioned in an opposite direction to the intra-prediction direction from a location of the current sample or the first reference location; determining a distance between the first reference location and the current sample as a first distance and determining a distance between the second reference location and the current sample as a second distance; and generating a prediction value of the current sample using the linear interpolation prediction based on a sample value of the first reference sample, the first distance, a sample value of the second reference sample, and the second distance.

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：US11240535B2

公开(公告)日：2022-02-01

申请号：US16651979

申请日：2018-07-02

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Jaehyun Lim

IPC: H04N7/12 ,  H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/192 ,  H04N19/635 ,  H04N19/189 ,  H04N19/64

Abstract: A filtering method by a decoding device according to the present invention comprises the steps of: receiving information relating to ALF control depth; deciding an ALF control unit on the basis of information relating to the division depth and the ALF control depth of a current block in a restoration picture with respect to a current picture; determining whether or not ALF is applied to the current block in an ALF control unit level; and, if the ALF is determined to be applied to the current block, performing the ALF for the current block. In the filtering method, the current picture is recursively divided on the basis of a QTBT structure, and the current block is one of blocks divided on the basis of the QTBT structure.

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.