公开(公告)号：US20220377320A1

公开(公告)日：2022-11-24

申请号：US17873487

申请日：2022-07-26

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 a current block indicates bi-prediction, weight index information for candidates in a merge candidate list or a sub-block merge candidate list can be derived, and thus coding efficiency can be increased.

公开(公告)号：US20220329825A1

公开(公告)日：2022-10-13

申请号：US17843531

申请日：2022-06-17

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Jaehyun LIM ,  Seunghwan KIM ,  Jungdong SEO ,  Jaeho LEE ,  Hyeongmoon JANG

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/503

Abstract: An image decoding method performed by a decoding apparatus includes the operations of: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block based on a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated based on the scaled movement vector and location of the current block; and deriving a movement vector of the current block based on the updated movement vector.

公开(公告)号：US20220272388A1

公开(公告)日：2022-08-25

申请号：US17611098

申请日：2020-06-25

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

IPC: H04N19/82 ,  H04N19/176 ,  H04N19/70 ,  H04N19/124

Abstract: According to a disclosure of the present document, coding efficiency and complexity of residual coding may be improved on the basis of a determination regarding whether or not lossless coding is used.

公开(公告)号：US20220264103A1

公开(公告)日：2022-08-18

申请号：US17730758

申请日：2022-04-27

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/18 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method according to the present document comprises the steps of: on the basis that an intra prediction mode of a chroma block is a cross-component linear model (CCLM) mode, updating the intra prediction mode of the chroma block on the basis of an intra prediction mode of a luma block corresponding to the chroma block; and determining an LFNST set including LFNST matrices on the basis of the updated intra prediction mode, wherein the updated intra prediction mode is derived as an intra prediction mode corresponding to a specific location in the luma block, and on the basis that the intra prediction mode corresponding to the specific location is an MIP mode, the updated intra prediction mode is updated to an intra planner mode.

公开(公告)号：US20220264102A1

公开(公告)日：2022-08-18

申请号：US17729917

申请日：2022-04-26

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method according to the present document comprises the steps of: on the basis of an intra prediction mode of a chroma block being a cross-component linear model (CCLM) mode and an intra prediction mode of a luma block corresponding to the chroma block being a palette mode, updating the intra prediction mode of the chroma block to an intra DC mode; on the basis of the updated intra prediction mode, determining an LFNST set including LFNST matrices; and performing LFNST on the chroma block on the basis of an LFNST matrix derived from the LFNST set, wherein the intra DC mode is an intra prediction mode corresponding to a specific location within the luma block.

公开(公告)号：US20220248055A1

公开(公告)日：2022-08-04

申请号：US17727516

申请日：2022-04-22

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/61 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/167

Abstract: An image decoding method according to the present document comprises the steps of: updating an intra-prediction mode of a chroma block on the basis of an intra-prediction mode of a luma block corresponding to the chroma block on the basis of the intra-prediction mode of the chroma block being a cross-component linear model (CCLM) mode; and determining a LFNST set including LFNST matrixes on the basis of the updated intra-prediction mode, wherein the updated intra-prediction mode is derived as an intra-prediction mode corresponding to a specific position in the luma block, and the updated intra-prediction mode is updated as an intra-DC mode on the basis of the intra-prediction mode, that corresponds to the specific position, being an intra-block copy (IBC) mode.

公开(公告)号：US20220232218A1

公开(公告)日：2022-07-21

申请号：US17615432

申请日：2020-06-23

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Seunghwan KIM

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

Abstract: A decoding method performed by a decoding device according to the present document comprises the steps of: determining a prediction mode of a current block on the basis of information about a prediction mode obtained from a bitstream; constructing a merge candidate list on the basis of the prediction mode; deriving motion information of the current block on the basis of the merge candidate list; and generating prediction samples of the current block on the basis of the motion information, wherein the bitstream includes information about a combined inter-picture merge and intra-picture prediction (CIIP) available flag indicating whether the CIIP is available, and the determination step may include a step of acquiring a regular merge flag from the bitstream on the basis of the CIIP available flag.

公开(公告)号：US20220141498A1

公开(公告)日：2022-05-05

申请号：US17577785

申请日：2022-01-18

Applicant: LG ELECTRONICS INC.

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

IPC: 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：US20220124357A1

公开(公告)日：2022-04-21

申请号：US17491791

申请日：2021-10-01

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Hyeongmoon JANG

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: Disclosed are an image processing method and an apparatus therefor. Specifically, the image processing method comprises the steps of: obtaining an intra prediction mode; obtaining a reference sample using a neighboring sample of the current block; determining whether to perform filtering on the reference sample; filtering the reference sample if it is determined to perform the filtering; and generating a prediction block using the reference sample or the filtered reference sample on the basis of the prediction mode, wherein the current block is a non-square block, the reference sample comprises a left reference sample and a top reference sample, and whether to perform the filtering is determined on the basis of at least one of a current block parameter or a surrounding block parameter.

公开(公告)号：US20220103809A1

公开(公告)日：2022-03-31

申请号：US17550476

申请日：2021-12-14

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

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

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