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：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：US20220256160A1

公开(公告)日：2022-08-11

申请号：US17610943

申请日：2020-06-17

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to this document comprises the steps of: determining whether the width and the height of a current block are smaller than or equal to the size of a maximum transform block; when the width and the height are smaller than or equal to the size of the maximum transform block, obtaining a BDPCM flag representing whether or not to apply BDPCM for the current block; deriving prediction samples for first and second samples of the current block on the basis of the BDPCM flag; deriving residual samples on the basis of received residual information; and deriving reconstructed samples for the first and second samples on the basis of the prediction samples and the residual samples.

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：US20220174270A1

公开(公告)日：2022-06-02

申请号：US17436964

申请日：2019-12-23

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jin HEO ,  Junghak NAM

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/132 ,  H04N19/172 ,  H04N19/107

Abstract: A method for decoding a video performed by a decoding device according to the present disclosure, comprises: a step for deriving a prediction mode of a neighboring block of a current block; a step for deriving an intra prediction mode candidate for configuring an MPM list on the basis of the derived prediction mode of the neighboring block; a step for configuring the MPM list on the basis of the derived intra prediction mode candidate; a step for determining an intra prediction mode for the current block on the basis of the configured MPM list; a step for deriving prediction samples for the current block on the basis of the determined intra prediction mode for the current block; and a step for generating a reconstructed picture on the basis of the prediction samples.

公开(公告)号：US20220159294A1

公开(公告)日：2022-05-19

申请号：US17424322

申请日：2020-06-17

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/132 ,  H04N19/11 ,  H04N19/70 ,  H04N19/136

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring image information including a block-based delta pulse code modulation (BDPCM) constraint flag indicating whether or not BDPCM is constrained with respect to an image; acquiring BDPCM-associated information regarding a current block on the basis of the BDPCM constraint flag; and generating reconstructed samples for the current block on the basis of the BDPCM-associated information.

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：US20220086448A1

公开(公告)日：2022-03-17

申请号：US17535090

申请日：2021-11-24

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Jaehyun LIM ,  Junghak NAM ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/18 ,  H04N19/176

Abstract: An image decoding method, according to the present document, may comprise the steps of: deriving transform coefficients for a current block on the basis of residual information; determining whether a significant coefficient is present in a second region excluding a first region in the top-left end of the current block; parsing a LFNST index from a bitstream if the significant coefficient is not present in the second region; deriving modified transform coefficients by applying a LFNST matrix, derived on the basis of the LFNST index, to transform coefficients of the first region; and deriving residual samples of the current block on the basis of an inverse primary transform of the modified transform coefficients.