公开(公告)号：US20210321109A1

公开(公告)日：2021-10-14

申请号：US17353137

申请日：2021-06-21

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jaehyun LIM ,  Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/132 ,  H04N19/119 ,  H04N19/46 ,  H04N19/159 ,  H04N19/176

Abstract: A video decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: receiving a bitstream including information about merge data of a current block; checking mh intra flag information for mh intra prediction which is included in the information about the merge data; checking information about a merge triangle prediction on the basis of a checking result that a value of the mh intra flag information is related to checking the information about the merge triangle prediction included in the information about the merge data; deriving prediction samples for the current block on the basis of a result of checking the information about the merge triangle prediction; and generating a reconstructed picture on the basis of the prediction samples.

公开(公告)号：US20210274207A1

公开(公告)日：2021-09-02

申请号：US17242646

申请日：2021-04-28

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Seunghwan KIM ,  Junghak NAM ,  Jaehyun LIM ,  Hyeongmoon JANG

IPC: H04N19/513 ,  H04N19/115 ,  H04N19/176

Abstract: An image decoding method performed by a decoding apparatus, includes deriving a history-based motion vector prediction (HMVP) buffer for a current block based on a history, and deriving motion information of the current block based on an HMVP candidate included in the HMVP buffer, thereby increasing inter prediction efficiency.

公开(公告)号：US20210185356A1

公开(公告)日：2021-06-17

申请号：US17190215

申请日：2021-03-02

Applicant: LG Electronics Inc.

Inventor： Jaehyun LIM ,  Seungwook PARK ,  Yongjoon JEON ,  Jungsun KIM ,  Hendry HENDRY ,  Byeongmoon JEON ,  Joonyoung PARK ,  Chulkeun KIM ,  Naeri PARK

IPC: H04N19/593 ,  H04N19/96 ,  H04N19/174 ,  H04N19/61 ,  H04N19/625 ,  H04N19/159 ,  H04N19/426 ,  H04N19/117 ,  H04N19/13 ,  H04N19/11 ,  H04N19/176 ,  H04N19/44 ,  H04N19/82 ,  H04N19/122 ,  H04N19/124 ,  H04N19/463 ,  H04N19/129

Abstract: A method for intra prediction comprises determining a first MPM candidate corresponding to a left-side candidate block on the basis of a position of the left-side candidate block adjacent to a left side of a current block; determining a second MPM candidate corresponding to an upper-end candidate block on the basis of a position of the upper-end candidate block adjacent to an upper end of the current block; generating an MPM candidate list including a plurality of MPM candidates, on the basis of the first MPM candidate and the second MPM candidate; and determining one MPM candidate of the plurality of the MPM candidates that constitute the MPM candidate list as an intra prediction mode of the current block, and performing intra prediction for the current block on the basis of the determined intra prediction mode to generate a prediction block corresponding to the current block.

公开(公告)号：US20210112274A1

公开(公告)日：2021-04-15

申请号：US17132378

申请日：2020-12-23

Applicant: LG ELECTRONICS INC.

Inventor： Joonyoung PARK ,  Seungwook Park ,  Jaehyun LIM ,  Jungsun KIM ,  Younghee Choi ,  Byeongmoon Jeon ,  Yongjoon Jeon

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/117

Abstract: The present invention relates to an intra-prediction method and to an encoder and decoder using same. The intra-prediction method according to one embodiment of the present invention comprises the steps of: deriving a prediction mode of a current block; and generating a prediction block with respect to the current block on the basis of the prediction mode of the current block. When the prediction mode of the current block is an intra-angular prediction mode, values of boundary samples from among left boundary samples and upper boundary samples of the prediction block, which are not positioned in a prediction direction of the intra-angular prediction mode, are derived on the basis of reference samples positioned in the prediction direction of the intra-angular prediction mode, and on the basis of adjacent reference samples.

公开(公告)号：US20210092442A1

公开(公告)日：2021-03-25

申请号：US17090519

申请日：2020-11-05

Applicant: LG Electronics Inc.

Inventor： Jungsun KIM ,  Seungwook PARK ,  Jaewon SUNG ,  Joonyoung PARK ,  Byeongmoon JEON ,  Jaehyun LIM ,  Yongjoon JEON ,  Younghee CHOI

IPC: H04N19/593 ,  H04N19/96

Abstract: Disclosed are a method for partitioning a block and a decoding device. A method for decoding an image comprises the steps of: partitioning one prediction unit, in which an intra prediction is performed in a predetermined intra prediction mode, into a plurality of transform units; and performing the intra prediction for each of the plurality of the transform units on the basis of the predetermined intra prediction mode. Thus, the invention increases the image encoding efficiency.

公开(公告)号：US20210092407A1

公开(公告)日：2021-03-25

申请号：US17110147

申请日：2020-12-02

Applicant: LG Electronics Inc.

Inventor： Joonyoung PARK ,  Byeongmoon JEON ,  Yongjoon JEON ,  Seungwook PARK ,  Jungsun KIM ,  Jaehyun LIM ,  Hendry HENDRY ,  Naeri PARK ,  Chulkeun KIM

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/11 ,  H04N19/44

Abstract: A method for decoding an image according to the present invention comprises the steps of: receiving and decoding MPM index information for indicating an MPM candidate which is to be used as an intra prediction mode of a current block; generating an MPM candidate list containing a plurality of MPM candidates for the current block; determining the MPM candidate indicated by the decoded MPM index information as the intra prediction mode of the current block, among the plurality of the MPM candidates which constitute the MPM candidate list; and generating a prediction block corresponding to the current block by performing intra prediction for the current block based on the determined intra prediction mode.

公开(公告)号：US20200374558A1

公开(公告)日：2020-11-26

申请号：US16758732

申请日：2018-07-04

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jaehyun LIM

IPC: H04N19/597 ,  H04N19/46 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172

Abstract: An image encoding method performed by an encoding device, according to the present invention, comprises the steps of: acquiring information associated with a 360-degree image in a 3D space; deriving rotation parameters for the 360-degree image; acquiring a projected picture by processing the 360-degree image on the basis of the rotation parameters for the 360-degree image, and a projection type; and generating, encoding and outputting 360-degree video information for the projected picture, wherein the projection type is equirectangular projection (ERP), and the 360-degree image in the 3D space is projected so that the specific position thereof in the 3D space, derived on the basis of the rotation parameters, is mapped at the center of the projected picture.

公开(公告)号：US20200267414A1

公开(公告)日：2020-08-20

申请号：US16651979

申请日：2018-07-02

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Jaehyun LIM

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/192

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：US20200260121A1

公开(公告)日：2020-08-13

申请号：US16848659

申请日：2020-04-14

Applicant: LG ELECTRONICS INC.

Inventor： Seungwook PARK ,  Jaehyun LIM ,  Yongjoon JEON ,  Chulkeun KIM ,  Jungsun KIM ,  Naeri PARK ,  Hendry HENDRY ,  Byeongmoon JEON ,  Joonyoung PARK

IPC: H04N19/86 ,  H04N19/60 ,  H04N19/176 ,  H04N19/134 ,  H04N19/61 ,  H04N19/117 ,  H04N19/14 ,  H04N19/82 ,  H04N19/159 ,  H04N19/172 ,  H04N19/136 ,  H04N19/196 ,  G06T5/00

Abstract: The present invention relates to a deblocking filtering method, a method for inducing bs (boundary strength) therefor, and a method and an apparatus for encoding/decoding using the same. The method for inducing the bS of the present invention comprises the steps of: inducing a boundary of a deblocking filtering unit block as a unit block for applying the deblocking filtering; and setting the bS according to each bS setting unit block within the deblocking filtering unit block, wherein the bS setting step can set a bS value for a target boundary corresponding to a boundary of the deblocking filtering unit block as the bs setting unit block.

公开(公告)号：US20200244967A1

公开(公告)日：2020-07-30

申请号：US16849646

申请日：2020-04-15

Applicant: LG Electronics Inc.

Inventor： Seungwook PARK ,  Joonyoung PARK ,  Jungsun KIM ,  Younghee CHOI ,  Yongjoon JEON ,  Jaewon SUNG ,  Byeongmoon JEON ,  Jaehyun LIM

IPC: H04N19/139 ,  H04N19/513 ,  H04N19/167 ,  H04N19/51 ,  H04N19/105 ,  H04N19/159 ,  H04N19/61 ,  H04N19/56 ,  H04N19/96

Abstract: The present invention discloses a method and apparatus for encoding or decoding a video signal. The method for processing a video signal according to the present invention uses a merging mode in which prediction information on a neighbor unit is used instead of transmitting prediction information on the present unit, so as to improve coding efficiency. In this case, the number of available candidate units for merging among the units in a predetermined position is determined, and information for the merging mode is acquired on the basis of the number of the available candidate units for merging. The unit to be merged is determined using the information for the merging mode, and prediction information on the unit to be merged is acquired. The prediction value for the present unit is acquired using the prediction information on the unit to be merged, and the present unit is restored using the acquired prediction value.