公开(公告)号：US12206857B2

公开(公告)日：2025-01-21

申请号：US17784556

申请日：2020-12-10

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Seunghwan Kim

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/503 ,  H04N19/70 ,  H04N19/80 ,  H04N19/86

Abstract: An image decoding method performed by a decoding apparatus, according to the present disclosure, comprises the steps of: obtaining indication information including a first flag which indicates whether signaling of a reference picture list, to be applied to a current block, is applied at a picture level or a slice level; on the basis of the first flag, parsing, from a picture header or a slice header, information related to the signaling of the reference picture list; performing inter-prediction on the basis of the information related to the signaling of the reference picture list so as to derive prediction samples for the current block; and generating, on the basis of the prediction samples, reconstructed samples for the current block.

公开(公告)号：US12200268B2

公开(公告)日：2025-01-14

申请号：US18410484

申请日：2024-01-11

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Junghak Nam ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/184

Abstract: A method by which a video decoding device decodes a video, according to the present document, comprises the steps of: parsing, from a bitstream, level information indicating the level with which output layer sets comply; acquiring, from the bitstream, constraint information about constraints with which the output layer sets comply; and performing a decoding procedure on the current picture on the basis of the level information and the constraint information, wherein the level information and the constraint information are included in a profile_tier_level syntax structure of the bitstream, and the constraint information in the profile_tier_level syntax structure can be next to the level information.

公开(公告)号：US12192470B2

公开(公告)日：2025-01-07

申请号：US18381446

申请日：2023-10-18

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/70 ,  H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46

Abstract: A video decoding method performed by a video decoding device according to the present document comprises the steps of: acquiring image information from a bitstream, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header; parsing, from the picture header, a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; and generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of the first flag or the second flag.

公开(公告)号：US12184868B1

公开(公告)日：2024-12-31

申请号：US18242961

申请日：2023-09-06

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Seunghwan Kim ,  Jin Heo

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

Abstract: Disclosed are a method for decoding a video signal and a device therefore. More particularly, a method for decoding an image based on an intra prediction mode, may comprise the steps of: acquiring a most probable mode (MPM) flag for indicating whether an MPM is applied to a current block, the MPM representing a mode in which an intra prediction mode of the current block is induced from an intra predicted block neighboring the current block; configuring an MPM list, on the basis of whether intra prediction modes of a left neighboring block and an above neighboring block of the current block satisfy predefined conditions, if the MPM is applied to the current block; acquiring an MPM index for indicating, within the MPM list, a specific intra prediction mode; and generating a prediction block for the current block by using the intra prediction mode specified by the MPM index.

公开(公告)号：US12177418B2

公开(公告)日：2024-12-24

申请号：US17780142

申请日：2020-12-07

Applicant: LG Electronics Inc.

Inventor： Hendry Hendry ,  Seunghwan Kim ,  Seethal Paluri

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/169 ,  H04N19/176

Abstract: According to the disclosure of the present document, by signaling NAL unit-related information for a first picture and a collocated reference picture-related information for a second picture following the first picture in a decoding order, a collocated reference picture with respect to the second picture can be limited, and thus the image coding efficiency can be enhanced.

公开(公告)号：US20240414325A1

公开(公告)日：2024-12-12

申请号：US18812623

申请日：2024-08-22

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: According to the disclosure of this document, it is possible to signal information related to a chroma quantization parameter offset through a palette coding syntax, and to efficiently parse and signal index information for a chroma quantization parameter offset list on the basis of information about the number of entries in the chroma quantization parameter offset list. Accordingly, bits that need to be signaled for video/image coding can be reduced, and coding efficiency can be improved.

公开(公告)号：US12160612B2

公开(公告)日：2024-12-03

申请号：US17914602

申请日：2021-03-23

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N11/02 ,  H04N19/122 ,  H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70 ,  H04N19/96

Abstract: An image decoding method according to the present document may comprise: a step of deriving transform coefficients for a current block by performing inverse quantization on the basis of residual information; and a step of deriving modified transform coefficients by applying LFNST to the transform coefficients, wherein the step of deriving the transform coefficients comprises a step of parsing position information of a last non-zero transform coefficient, an LFNST index related to application of the LFNST is parsed after parsing a position of the last non-zero transform coefficient, and the transform coefficients are derived after parsing the LFNST index.

公开(公告)号：US12155830B2

公开(公告)日：2024-11-26

申请号：US18201700

申请日：2023-05-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/136 ,  H04N19/122 ,  H04N19/176 ,  H04N19/196

Abstract: A method for decoding a picture performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information, deriving a quantized transform coefficient for a current block based on the residual information included in the bitstream, deriving a transform coefficient from the quantized transform coefficient based on a dequantization process, deriving a residual sample for the current block by applying an inverse transform to the derived transform coefficient, and generating a reconstructed picture based on the residual sample for the current block.

公开(公告)号：US12143585B2

公开(公告)日：2024-11-12

申请号：US17344410

申请日：2021-06-10

Applicant: LG Electronics Inc.

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

IPC: H04N19/122 ,  H04N19/11 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46

Abstract: A video decoding method according to the present document comprises the steps of: deriving transform coefficients by performing de-quantization on the basis of quantized transform coefficients for a target block; deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) of the transform coefficients; and generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein an inverse RST using a transform kernel matrix is performed on transform coefficients of an upper-left 4×4 region of an 8×8 region of the target block, and modified transform coefficients of the upper-left 4×4 region, an upper-right 4×4 region, and a lower-left 4×4 region of the 8×8 region are derived through the inverse RST.

公开(公告)号：US12126831B2

公开(公告)日：2024-10-22

申请号：US17947047

申请日：2022-09-16

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Jaehyun Lim ,  Seunghwan Kim

IPC: H04N11/02 ,  H04N19/119 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/61

CPC classification number: H04N19/61 ,  H04N19/119 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46

Abstract: An image decoding method according to the present document comprises the steps of: receiving a quantized transform coefficient for a target block and a transform index for non-separable quadratic transform; deriving transform coefficients by inversely quantizing the quantized transform coefficient; deriving corrected transform coefficients on the basis of a transform kernel matrix in a predetermined transform set indicated by the transform index; and deriving residual samples for the target block on the basis of inverse linear transform for the corrected transform coefficients, wherein when the target block is divided into a predetermined number of sub-blocks and is coded by intra prediction, the corrected transform coefficients are derived in units of the sub-blocks, and the transform index is received for the target block.