公开(公告)号：US20230007269A1

公开(公告)日：2023-01-05

申请号：US17899248

申请日：2022-08-30

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

Abstract: A video decoding method comprises: deriving L0 and L1 motion vectors of a current block; deriving decoder-side motion vector refinement (DMVR) flag information indicating whether to apply a DMVR to the current block; when the DMVR flag information indicates that the DMVR is to be applied to the current block, deriving refined L0 and L1 motion vectors based on the L0 and L1 motion vectors by applying the DMVR to the current block; deriving prediction samples of the current block based on the refined L0 and L1 motion vectors; and generating reconstructed samples of the current block based on the predicted samples, wherein deriving DMVR flag information comprises deriving the DMVR flag information by applying the DMVR to the current block when the height of the current block is 8 or more, and when the values of L0 and L1 luma weighted prediction flag information are both 0.

公开(公告)号：US20220385936A1

公开(公告)日：2022-12-01

申请号：US17846499

申请日：2022-06-22

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  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：US20220377370A1

公开(公告)日：2022-11-24

申请号：US17618728

申请日：2020-06-15

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Junghak NAM

IPC: H04N19/577 ,  H04N19/52 ,  H04N19/70

Abstract: An image decoding method according to the present document comprises the steps of: acquiring inter prediction mode information from encoded information; constructing a motion vector predictor candidate list of a current block on the basis of the inter prediction mode information; deriving a motion vector of the current block on the basis of the motion vector predictor candidate list; and generating prediction samples of the current block on the basis of the motion vector.

公开(公告)号：US20220360773A1

公开(公告)日：2022-11-10

申请号：US17620936

申请日：2020-06-18

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG

IPC: H04N19/117 ,  H04N19/80 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: According to the disclosure of the present document, filter length can be determined on the basis of the distance between block boundaries in a deblocking filtering process, the deblocking filtering can be performed on the basis of the filter length, and thereby, the picture quality of the image/video can be enhanced, and the effects of improved subjective picture quality relative to complexity and simplification of H/W design can be obtained.

公开(公告)号：US20220353499A1

公开(公告)日：2022-11-03

申请号：US17863980

申请日：2022-07-13

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Jaehyun LIM ,  Jin HEO

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/119 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159

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：US20220174285A1

公开(公告)日：2022-06-02

申请号：US17674765

申请日：2022-02-17

Applicant: LG Electronics Inc.

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

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

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：US20220150472A1

公开(公告)日：2022-05-12

申请号：US17550847

申请日：2021-12-14

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: According to the disclosure of the present document, when the inter-prediction type of the current block indicates biprediction, weight index information for a candidate in a merge candidate list or sub-block merge candidate list can be derived, and coding efficiency can be raised.

公开(公告)号：US20220116652A1

公开(公告)日：2022-04-14

申请号：US17559964

申请日：2021-12-22

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/52 ,  H04N19/107 ,  H04N19/105 ,  H04N19/139 ,  H04N19/132 ,  H04N19/176 ,  H04N19/172 ,  H04N19/573

Abstract: An image decoding method according to the present document may comprise the steps of: deriving an inter prediction mode from encoded information; configuring reference picture lists, deriving motion information comprising reference picture indexes for symmetric motion vector differences (SMVD); and generating prediction samples on the basis of the motion information, wherein the reference picture indexes for SMVD can be derived on the basis of short-term reference pictures included within the reference picture lists.

公开(公告)号：US20220070442A1

公开(公告)日：2022-03-03

申请号：US17420241

申请日：2020-01-02

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG

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

Abstract: A video decoding method performed by a decoding device according to the present document is characterized by including: a step for deriving reference subblocks in a reference picture on the basis of the motion vector of an adjacent block on the left side of the current block; a step for deriving a subblock-based temporal merge candidate for the current block on the basis of motion information about the reference subblocks; a step for forming an affine merge candidate list for the current block, the affine merge candidate list including the subblock-based temporal merge candidate; a step for deriving motion information about subblocks of the current block on the basis of the affine merge candidate list; a step for deriving prediction samples for the current block on the basis of the motion information about the subblocks; and a step for generating a reconstructed picture on the basis of the prediction samples.

公开(公告)号：US20220070440A1

公开(公告)日：2022-03-03

申请号：US17416913

申请日：2020-01-02

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Junghak NAM

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

Abstract: A method for decoding an image by a decoding apparatus according to the present document comprises the steps of: obtaining merge with motion vector difference (MMVD) flag information of a current block from a bit stream; determining whether or not the current block is a current picture referencing (CPR) coding block; if the current block is a CPR coding block, deriving base motion information; deriving motion information of the current block on the basis of the base motion information; generating prediction samples of the current block on the basis of the motion information; and generating reconstruction samples of the current block on the basis of the prediction samples, wherein the MMVD flag information indicates whether or not motion information is derived when the MMVD is applied to the current block, and the CPR coding block is a block coded by using a current picture including the current block as a reference picture.