公开(公告)号：US20250168344A1

公开(公告)日：2025-05-22

申请号：US19028701

申请日：2025-01-17

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Sunmi YOO ,  Jin HEO ,  Jangwon CHOI ,  Seunghwan KIM

IPC: 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.

公开(公告)号：US20250133212A1

公开(公告)日：2025-04-24

申请号：US18833579

申请日：2023-01-10

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

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

Abstract: An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: deriving neighboring samples for sign prediction of a current block; deriving costs of sign combination candidates for transform coefficients of the current block on the basis of the neighboring samples; predicting signs of the transform coefficients from the sign combination candidates on the basis of the costs; deriving residual samples of the current block on the basis of the predicted signs; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20240373014A1

公开(公告)日：2024-11-07

申请号：US18772834

申请日：2024-07-15

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jaehyun LIM ,  Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: An image decoding method, which is performed by a decoding device according to the present document, is characterized by including: a step for receiving a bitstream including residual information about the current block; a step for deriving a maximum value of the number of context-encoding bins for context syntax elements coded on the basis of context included in the residual information; a step for entropy-decoding the context syntax elements on the basis of the maximum value; a step for deriving conversion coefficients for the current block on the basis of the entropy-decoded context syntax elements; a step for deriving a residual sample for the current block on the basis of the conversion coefficients; and a step for generating a reconstructed picture on the basis of the residual sample for the current block.

公开(公告)号：US20240357111A1

公开(公告)日：2024-10-24

申请号：US18573087

申请日：2022-07-06

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jie ZHAO ,  Moonmo KOO ,  Jaehyun LIM ,  Jangwon CHOI ,  Seung Hwan KIM

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

CPC classification number: H04N19/122 ,  H04N19/176 ,  H04N19/196

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method comprises generating a residual block of a current block by performing inverse transform on the current block based on a predetermined non-separable primary transform matrix and reconstructing the current block based on the residual block. The non-separable primary transform matrix may be applied to all transform coefficients of the current block regardless of a size of the current block.

公开(公告)号：US20240323355A1

公开(公告)日：2024-09-26

申请号：US18733676

申请日：2024-06-04

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Jungah CHOI

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

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

Abstract: A video decoding method according to the present document is characterized by comprising: obtaining Most Probable Mode (MPM) index information and reference line index information from a bitstream; compiling an MPM list including candidate intra prediction modes for the intra prediction of a current block; deriving an intra prediction mode for the current block from among the candidate intra prediction modes included in the MPM list on the basis of the MPM index information; generating prediction samples for the current block on the basis of the intra prediction mode; and generating reconstructed samples for the current block on the basis of the prediction samples, wherein the step for compiling the MPM list involves deriving a DC mode as one of the candidate intra prediction modes, and including the DC mode in the MPM list, the DC mode being derived on the basis of the value of reference line index information indicating a reference line used for the intra prediction of the current block not being zero.

公开(公告)号：US20240163475A1

公开(公告)日：2024-05-16

申请号：US18422857

申请日：2024-01-25

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Seunghwan KIM ,  Jin HEO ,  Jungah CHOI ,  Sunmi YOO

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30 ,  H04N19/70

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30 ,  H04N19/70

Abstract: An image decoding method according to this disclosure includes receiving image information including intra matrix-based intra prediction (MIP) flag information related to whether an MIP is applied to a current block through a bitstream, deriving an intra prediction type for the current block as the MIP based on the intra MIP flag information, generating intra prediction samples for the current block based on the MIP, and generating reconstructed samples for the current block based on the intra prediction samples.

公开(公告)号：US20240129534A1

公开(公告)日：2024-04-18

申请号：US18396644

申请日：2023-12-26

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/64 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/647 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91 ,  H04N19/513

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information; deriving quantized transform coefficients for a current block based on the residual information included in the bitstream; deriving residual samples for the current block based on the quantized transform coefficients; and generating a reconstructed picture based on the residual samples for the current block.

公开(公告)号：US20240056579A1

公开(公告)日：2024-02-15

申请号：US18383327

申请日：2023-10-24

Applicant: LG ELECTRONICS INC.

Inventor： Jungah CHOI ,  Seunghwan KIM ,  Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI

IPC: H04N19/132 ,  H04N19/129 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

CPC classification number: H04N19/132 ,  H04N19/129 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information; deriving quantized transform coefficients for a current block based on the residual information included in the bitstream; deriving transform coefficients for the current block from the quantized transform coefficients based on an inverse quantization process; deriving residual samples for the current block by applying inverse transform to the derived transform coefficients; and generating a reconstructed picture based on the residual samples for the current block.

公开(公告)号：US20230042089A1

公开(公告)日：2023-02-09

申请号：US17957986

申请日：2022-09-30

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Sunmi YOO ,  Junghak NAM ,  Jin HEO ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/18 ,  H04N19/70 ,  H04N19/184

Abstract: An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring a sign data hiding enable flag; acquiring a transform skip residual coding (TSRC) enable flag on the basis of the sign data hiding enable flag; acquiring residual information for a current block, on the basis of the TSRC enable flag; 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 sign data hiding enable flag is a flag indicating whether sign data hiding is enabled, the TSRC enable flag is a flag indicating whether TSRC is enabled, and the TSRC enable flag is acquired on the basis of the sign data hiding enable flag having a value of zero.

公开(公告)号：US20220264104A1

公开(公告)日：2022-08-18

申请号：US17732087

申请日：2022-04-28

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jaehyun LIM ,  Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70 ,  H04N19/88

Abstract: An image decoding method performed by a decoding device, according to the present document, comprises the steps of: receiving a bitstream including residual information of a current block; deriving a specific number of context-encoding bins for context syntax elements for a current sub-block of the current block; decoding the context syntax elements for the current sub-block included in the residual information on the basis of the specific number; deriving transform coefficients for the current sub-block on the basis of the decoded context syntax elements; deriving residual samples for the current block on the basis of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples.