公开(公告)号：US12095997B2

公开(公告)日：2024-09-17

申请号：US17791478

申请日：2021-01-08

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/46 ,  H04N19/96

CPC classification number: H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/46 ,  H04N19/96

Abstract: An image decoding method according to the present document may comprise a step for deriving corrected transform coefficients, wherein the step for deriving corrected transform coefficients may comprise the steps of: determining whether the tree type of the current block is a single tree; deriving a first variable and a second variable for a luma component of the current block and not deriving the first and second variables for a chroma component of the current block if the tree type is the first tree; parsing an LFNST index on the basis of the first variable and the second variable; and deriving the corrected transform coefficients by applying an LFNST kernel derived on the basis of the LFNST index.

公开(公告)号：US20240305814A1

公开(公告)日：2024-09-12

申请号：US18595710

申请日：2024-03-05

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Seunghwan Kim ,  Sunmi Yoo ,  Jungah Choi ,  Ling Li

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196

Abstract: An image decoding method executed by a decoding apparatus according to the present document comprises the steps of: deriving an intra prediction mode of the current chroma block by means of cross-component linear model (CCLM) mode; deriving downsampled luma samples on the basis of the current luma block; deriving downsampled neighboring luma samples on the basis of neighboring luma samples of the current luma block; and deriving the CCLM parameter on the basis of the downsampled neighboring luma samples and neighboring chroma samples of the current neighboring chroma block, wherein the number of downsampled neighboring luma samples and number of neighboring chroma samples are equal to the previously set thresh-hold value, and the thresh-hold value is derived on the basis of the width and height of the current chroma block

公开(公告)号：US12088845B2

公开(公告)日：2024-09-10

申请号：US17740284

申请日：2022-05-09

Applicant: LG ELECTRONICS INC.

Inventor： Junghak Nam ,  Seunghwan Kim ,  Hyeongmoon Jang ,  Jaehyun Lim

IPC: H04N19/64 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

CPC classification number: H04N19/647 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

Abstract: An image decoding method performed by means of a decoding device according to the present invention comprises the steps of: obtaining first split information relating to a first target block; if the first split information indicates that the first target block is to be split, splitting the first target block into first sub-blocks; obtaining MPT split information relating to a second target block which is one of the first sub-blocks of the first target block; splitting the second target block into second sub-blocks on the basis of the MPT split information; and decoding the second sub-blocks, wherein the second sub-blocks are non-square blocks.

公开(公告)号：US12088830B2

公开(公告)日：2024-09-10

申请号：US18100781

申请日：2023-01-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/18 ,  H04N19/176 ,  H04N19/184 ,  H04N19/46 ,  H04N19/60 ,  H04N19/91

CPC classification number: H04N19/18 ,  H04N19/176 ,  H04N19/184 ,  H04N19/46 ,  H04N19/60 ,  H04N19/91

Abstract: An image information decoding method performed by means of a decoding device according to the present invention comprises the steps of: decoding a non-separable secondary transform (NSST) index from a bitstream if NSST is applied to a target block; decoding information relating to transform coefficients with respect to the target block from the bitstream on the basis of the decoded NSST index; and deriving the transform coefficients with respect to the target block on the basis of the decoded information relating to the transform coefficients, wherein the NSST index is decoded prior to the information relating to the transform coefficients with respect to the target block.

公开(公告)号：US12088812B2

公开(公告)日：2024-09-10

申请号：US17777241

申请日：2020-11-17

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

CPC classification number: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

Abstract: In relation to an in-loop filtering procedure described in the present document, a virtual boundary is defined so as to further increase the subjective/objective visual quality of a restored picture and the in-loop filtering procedure can be applied across the virtual boundary. The virtual boundary can include, for example, a discontinuous edge such as a 360-degree image, a VR image, or picture in picture (PIP). For example, the virtual boundary can be at a predetermined appointed position, and the existence and/or the position thereof can be signaled. Embodiments of the present document present a method for efficiently signaling virtual boundary-related information.

公开(公告)号：US20240291984A1

公开(公告)日：2024-08-29

申请号：US18644627

申请日：2024-04-24

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/119 ,  H04N19/167 ,  H04N19/174 ,  H04N19/196 ,  H04N19/70

CPC classification number: H04N19/119 ,  H04N19/167 ,  H04N19/174 ,  H04N19/196 ,  H04N19/70

Abstract: In a method for decoding an image by a decoding apparatus according to the present disclosure, a current picture is configured to include a single slice, on the basis of a flag indicating whether information on a subpicture exists and a flag indicating whether the subpicture includes a single slice.

公开(公告)号：US12075050B2

公开(公告)日：2024-08-27

申请号：US17629597

申请日：2020-08-20

Applicant: LG Electronics Inc.

Inventor： Jie Zhao ,  Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/50 ,  H04N19/61 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/50 ,  H04N19/61 ,  H04N19/70 ,  H04N19/96

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: acquiring image information; and generating a reconstruction picture on the basis of the image information.

公开(公告)号：US12069254B2

公开(公告)日：2024-08-20

申请号：US18141159

申请日：2023-04-28

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82 ,  H04N19/91

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82 ,  H04N19/91

Abstract: According to the disclosure of the present disclosure, the index of an alternative filter is derived from ALF information, and an ALF procedure for a chroma component of a current block can be performed on the basis of the alternative filter.

公开(公告)号：US20240275973A1

公开(公告)日：2024-08-15

申请号：US18611275

申请日：2024-03-20

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/96

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/96

Abstract: An image decoding method according to the present document can comprise the steps of: acquiring, from a bitstream, intra prediction mode information and an LFNST index; deriving, as a cross-component linear model (CCLM) mode, an intra prediction mode of a chroma block on the basis of the intra prediction mode information; changing the intra prediction mode of the chroma block from the CCLM mode to an intra prediction mode of a luma block corresponding to the chroma block; determining an LFNST set, including LFNST matrices, on the basis of the intra prediction mode of the luma block; selecting one of the LFNST matrices on the basis of the LFNST set and the LFNST index; and deriving transform coefficients for the chroma block on the basis of the selected LFNST matrix.

公开(公告)号：US12063368B2

公开(公告)日：2024-08-13

申请号：US18128132

申请日：2023-03-29

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N7/18 ,  G06F9/48 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N23/60

CPC classification number: H04N19/132 ,  G06F9/4812 ,  G06F9/4881 ,  H04N19/176 ,  H04N19/18 ,  H04N19/1883 ,  H04N19/60 ,  H04N23/60

Abstract: An image decoding method according to the present document comprises a step of deriving a corrected transform coefficient, wherein the step of deriving the corrected transform coefficient comprises the steps of: determining whether LFNST can be applied to the height and width of a divided sub-partition block when an ISP is applied to a current block; parsing a LFNST index when the LFNST can be applied; and deriving the corrected transform coefficient on the basis of the LFNST index and a LFNST matrix.