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.

公开(公告)号：US20220060689A1

公开(公告)日：2022-02-24

申请号：US17414893

申请日：2020-01-02

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/513 ,  H04N19/159 ,  H04N19/132

Abstract: A method by which a decoding device performs image decoding, according to the present document, comprises the steps of: deriving a reference block on the basis of a motion shift; determining whether a subblock temporal motion vector predictor (sbTMVP) candidate is available, on the basis of whether the reference block is a current picture referencing (CPR) block; deriving motion information about a current block on the basis of the sbTMVP candidate when the sbTMVP candidate is available; generating prediction samples on the basis of the motion information; and generating a restored picture on the basis of the prediction samples, wherein the sbTMVP candidate is determined to be unavailable with respect to the reference block which is the CPR block.

公开(公告)号：US20220007021A1

公开(公告)日：2022-01-06

申请号：US17481415

申请日：2021-09-22

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/176

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: receiving prediction mode information about a current block; receiving intra sub-partitions (ISP)-related information about the current block on the basis of the size and the maximum conversion block size of the current block; deriving an intra prediction mode of the current block on the basis of the prediction mode information; and generating a prediction sample of the current block on the basis of the intra prediction mode and the ISP-related information.

公开(公告)号：US20210337209A1

公开(公告)日：2021-10-28

申请号：US17366722

申请日：2021-07-02

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Junghak NAM

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176

Abstract: A method for decoding an image by a decoding apparatus according to the present document comprises the steps of: receiving a bit stream including prediction information of a current block; configuring a merge candidate list with respect to the current block; deriving motion information of the current block on the basis of a merge candidate indicated by a candidate flag of the current block in the merge candidate list; deriving an MVD of the current block on the basis of MVD information of the current block and whether or not integer sample precision or fractional sample precision is used in the motion information; deriving modified motion information of the current block on the basis of the motion information and the MVD; and performing prediction of the current block on the basis of the modified motion information, wherein the prediction information includes the candidate flag and the MVD information.

公开(公告)号：US20210321141A1

公开(公告)日：2021-10-14

申请号：US17356016

申请日：2021-06-23

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/85

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: generating a restoration picture on the basis of prediction samples of a coding block; deriving a boundary strength (BS) for a boundary of the coding block in the restoration picture; performing deblocking filtering on the boundary of the coding block on the basis of the boundary strength; and deriving a modified restoration picture for the restoration picture on the basis of the deblocking filtering, wherein the boundary strength is derived on the basis of a prediction mode of a first block and a second block that are adjacent to the boundary of the coding block, and the prediction mode of the first block or the second block is derived on the basis of whether the prediction mode of the first block or the second block is a current picture referencing (CPR) mode to be coded in reference to a current picture.

公开(公告)号：US20210297684A1

公开(公告)日：2021-09-23

申请号：US16325994

申请日：2016-08-19

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Sunmi YOO ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/82 ,  H04N19/46 ,  H04N19/176

Abstract: The present invention provides a method for decoding a video signal, which includes: generating a first prediction block according to a prediction mode of a current block; checking the prediction mode of a neighboring block adjacent to the current block; generating a second prediction block based on the prediction mode of the neighboring block; generating a final prediction block by applying a weight to the first prediction block and the second prediction block; and reconstructing the video signal by using the final prediction block.

公开(公告)号：US20210218957A1

公开(公告)日：2021-07-15

申请号：US17215316

申请日：2021-03-29

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

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

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.