公开(公告)号：US11902527B2

公开(公告)日：2024-02-13

申请号：US17942691

申请日：2022-09-12

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/96

Abstract: According to the disclosure of the present document, it is possible for various LMCS application cases to apply an LMCS procedure to a block having a dual tree structure. In addition, the coding predormance of the block can be improved. According to the disclosure of the present document, resources required for the LMCS procedure can be reduced. Therefore, the complexity of the LMCS can be reduced and the video/image coding efficiency can be increased.

公开(公告)号：US11889082B2

公开(公告)日：2024-01-30

申请号：US17960986

申请日：2022-10-06

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/109 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/109 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: According to disclosure of the present document, an LMCS procedure can be used for blocks having various block tree structures, and memories used in the LMCS procedure can be reduced (limited).

公开(公告)号：US11889080B2

公开(公告)日：2024-01-30

申请号：US17840181

申请日：2022-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Mehdi Salehifar ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/122 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

CPC classification number: H04N19/122 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

Abstract: Techniques and systems for reconstructing a video signal, which include: obtaining a transform coefficient block by performing an entropy decoding and a dequantization for a current block; deriving a secondary transform corresponding to a specific area in the transform coefficient block, wherein the specific area represents an area including a top-left block of the transform coefficient block; performing an inverse secondary transform for each of subblocks within the specific area using the secondary transform; performing an inverse primary transform for a block which the inverse secondary transform is applied to; and reconstructing the current block using a block which the primary inverse transform is applied to.

公开(公告)号：US11889062B2

公开(公告)日：2024-01-30

申请号：US17979158

申请日：2022-11-02

Applicant: LG Electronics Inc.

Inventor： Seethal Paluri ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70 ,  H04N19/82

CPC classification number: H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70 ,  H04N19/82

Abstract: According to the disclosure of the present document, scaling list data transmitted from an adaptation parameter set (APS) can be signaled through a hierarchical structure. In addition, by setting a limit on the scaling list data transmitted from the APS, it is possible to reduce the amount of data which has to be signaled for video/image coding, and facilitate implementation.

公开(公告)号：US20240022727A1

公开(公告)日：2024-01-18

申请号：US18368861

申请日：2023-09-15

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri Park ,  Seunghwan Kim

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

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: According to the disclosure of the present document, when the inter prediction type of a current block indicates biprediction, 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：US11877010B2

公开(公告)日：2024-01-16

申请号：US17429569

申请日：2020-06-23

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Seunghwan Kim

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176

CPC classification number: H04N19/70 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176

Abstract: A decoding method performed by a decoding device according to the present document comprises: a step for determining the prediction mode of a current block on the basis of information on a prediction mode acquired from a bitstream; a step for deriving movement information on the current block on the basis of the prediction mode; a step for generating prediction samples of the current block on the basis of the movement information; and a step for generating reconstructed samples on the basis of the prediction samples, wherein the step for determining the prediction mode may include a step for acquiring a regular merge flag from the bitstream on the basis of a combined inter-picture merge and intra-picture prediction (CIIP) available flag that indicates whether or not a CIIP is available.

公开(公告)号：US11877005B2

公开(公告)日：2024-01-16

申请号：US18104692

申请日：2023-02-01

Applicant: LG ELECTRONICS INC.

Inventor： Jaeho Lee ,  Seunghwan Kim

IPC: H04N19/513 ,  H04N19/139 ,  H04N19/573 ,  H04N19/176 ,  H04N19/52

CPC classification number: H04N19/573 ,  H04N19/176 ,  H04N19/52

Abstract: An image decoding method performed by a decoding apparatus according to the present document includes constituting a candidate list for deriving motion information of a sub-block unit for a current block, wherein the merge candidate list includes constructed candidates; deriving control point motion vectors (CPMVs) for control points (CPs) of the current block based on the merge candidate list; deriving prediction samples for the current block based on the CPMVs; and generating a reconstructed picture for the current block based on the derived prediction samples, wherein the constructed candidates are derived based on combination of at least two of a first neighboring block in a first group, a second neighboring block in a second group, a third neighboring block in a third group and a fourth neighboring block, and the first neighboring block, the second neighboring block and the third neighboring block and the fourth neighboring block constituting the combination have the same reference picture index.

公开(公告)号：US11825096B2

公开(公告)日：2023-11-21

申请号：US17737806

申请日：2022-05-05

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Hendry Hendry ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/70

Abstract: A video decoding method performed by a video decoding apparatus, according to the present document, comprises the steps of: obtaining image information from a bitstream, wherein the image information includes a picture header associated with a current picture, and the current picture includes a plurality of slices; parsing at least one of a first flag and a second flag from the picture header; generating prediction samples by performing at least one of intra prediction and inter prediction on a current block in the current picture on the basis of at least one of the first flag and the second flag; generating reconstructed samples on the basis of the prediction samples; and generating a reconstructed picture on the basis of the reconstructed samples.

公开(公告)号：US11818370B2

公开(公告)日：2023-11-14

申请号：US17846692

申请日：2022-06-22

Applicant: LG ELECTRONICS INC.

Inventor： Jie Zhao ,  Seunghwan Kim

IPC: H04N19/186 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/70

Abstract: According to the disclosure of the present document, an ID value of an LMCS APS may be within a predetermined range. Thus, an LMCS procedure can be efficiently performed, and the complexity of LMCS is reduced. Since the performance of LMCS is improved, efficiency of video/image coding may increase.

公开(公告)号：US11812019B2

公开(公告)日：2023-11-07

申请号：US17797849

申请日：2021-02-05

Applicant: LG ELECTRONICS INC.

Inventor： Jungah Choi ,  Sunmi Yoo ,  Jin Heo ,  Jangwon Choi ,  Seunghwan Kim

IPC: H04N11/02 ,  H04N19/12 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/12 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: obtaining a dependent quantization available flag; obtaining a TSRC available flag, on the basis of the dependent quantization available flag; determining a residual coding syntax for a current block, on the basis of the TSRC available flag; obtaining residual information of the determined residual coding syntax for the current block; deriving a residual sample of the current block, on the basis of the residual information; and generating a reconstructed picture, on the basis of the residual sample, wherein the dependent quantization available flag is a flag regarding whether dependent quantization is available, the TSRC available flag is a flag regarding whether TSRC is available, and the TSRC available flag is obtained on the basis of the dependent quantization available flag having a value of 0.