公开(公告)号：US20220210476A1

公开(公告)日：2022-06-30

申请号：US17603543

申请日：2020-08-26

Applicant: LG Electronics Inc.

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

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/132 ,  H04N19/12 ,  H04N19/18 ,  H04N19/60

Abstract: A method for decoding a video performed by a decoding device according to the present document is characterized by comprising: a step for acquiring video information including residual syntax elements for a current residual coefficient in a current block; a step for deriving the current residual coefficient on the basis of the residual syntax elements; and a step for deriving a reconstructed sample of the current block on the basis of the current residual coefficient.

公开(公告)号：US20220150542A1

公开(公告)日：2022-05-12

申请号：US17612186

申请日：2020-05-22

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/159 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: acquiring a block-based delta pulse code modulation (BDPCM) flag for a current block; on the basis of the BDPCM flag indicating that BDPCM is applied to the current block, acquiring a BDPCM direction flag for the current block; and storing, as an intra-prediction mode of the current block, an intra-prediction mode of a prediction direction derived on the basis of the BDPCM direction flag.

公开(公告)号：US20220150527A1

公开(公告)日：2022-05-12

申请号：US17612097

申请日：2020-05-22

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: acquiring a block-based delta pulse code modulation (BDPCM) flag indicating whether BDPCM is applied to a current block; on the basis of the BDPCM flag, acquiring residual information and a BDPCM direction flag indicating a prediction direction for the current block; on the basis of the BDPCM direction flag, deriving the prediction direction; and storing, as an intra-prediction mode of the current block, an intra-prediction mode of the prediction direction derived on the basis of the BDPCM direction flag.

公开(公告)号：US20220132157A1

公开(公告)日：2022-04-28

申请号：US17569342

申请日：2022-01-05

Applicant: LG ELECTRONICS INC.

Inventor： Jungah CHOI ,  Jaehyun Lim ,  Sunmi Yoo ,  Jangwon Choi ,  Seunghwan Kim

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

Abstract: An image decoding method performed by a decoding device according to the present document is characterized by including the steps of: receiving image information including a residual coding flag indicating whether a transform skip residual coding syntax structure is available for the current slice; determining whether the transform skip residual coding syntax structure is available for the current block in the current slice on the basis of the residual coding flag; parsing residual information for the current block on the basis of the results of the determination to derive residual samples of the current block; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20210352281A1

公开(公告)日：2021-11-11

申请号：US17369706

申请日：2021-07-07

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/132 ,  H04N19/105

Abstract: An image decoding method according to the present document derives a left mode, which is a candidate intra prediction mode for a left peripheral block of a current block, derives an upper mode, which is a candidate intra prediction mode for an upper peripheral block of the current block, constructs an MPM list on the basis of the left mode and the upper mode, derives an intra prediction mode of the current block on the basis of the MPM list, generates prediction samples of the current block on the basis of the intra prediction mode, generates a restoration picture of the current block on the basis of the prediction samples, and derives the left mode or the upper mode as one from among candidate intra prediction modes of the MPM list, on the basis of when the left mode and the upper mode are not the same and the left mode and the upper mode are respectively a planar mode and a DC mode.

公开(公告)号：US20200252616A1

公开(公告)日：2020-08-06

申请号：US16856406

申请日：2020-04-23

Applicant: LG Electronics Inc.

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

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

Abstract: A method for decoding an image by a decoding device according to the present disclosure comprises the steps of: receiving a bit stream including residual information; deriving a quantized conversion factor of a current block on the basis of the residual information included in the bit stream; deriving a residual sample of the current block on the basis of the quantized conversion factor; and generating a reconstructed picture on the basis of the residual sample of the current block.

公开(公告)号：US20200177882A1

公开(公告)日：2020-06-04

申请号：US16709471

申请日：2019-12-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/136 ,  H04N19/60 ,  H04N19/124

Abstract: An image decoding method includes receiving residual information including first size related information for a first residual coefficient and second size related information for a second residual coefficient, setting a Rice parameter of the first size related information and the second size related information as a specific value, deriving available binary values based on the Rice parameter, deriving binary values of the first size related information and the second size related information by decoding the first size related information and the second size related information, deriving values of the first size related information and the second size related information by comparing the binary values and the available binary values, deriving the first residual coefficient and the second residual coefficient based on the values, and reconstructing a current picture based on the first residual coefficient and the second residual coefficient.

公开(公告)号：US20250159180A1

公开(公告)日：2025-05-15

申请号：US19021641

申请日：2025-01-15

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: deriving a context model for a sign flag of a current residual coefficient of a current block; and decoding the sign flag on the basis of the context model, wherein the context model for the sign flag is derived on the basis of a sign flag of a residual coefficient decoded before the current residual coefficient in the current block.

公开(公告)号：US20250071276A1

公开(公告)日：2025-02-27

申请号：US18935072

申请日：2024-11-01

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI

IPC: H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

Abstract: According to the disclosure of the present document, transform skip availability information and palette availability information are signaled via a sequence parameter set (SPS), and transform skip- and/or palette coding-related information can be effectively parsed/signaled on the basis of at least one of the transform skip availability information and the palette availability information. 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：US20240373022A1

公开(公告)日：2024-11-07

申请号：US18778196

申请日：2024-07-19

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/60 ,  H04N19/70

Abstract: A method by which a decoding device decodes an image, according to the present invention, comprises the steps of: receiving a bitstream including residual information; deriving a quantized transform coefficient for a current block on the basis of the residual information included in the bitstream; deriving a residual sample for the current block on the basis of the quantized transform coefficient; and generating a restored picture on the basis of the residual sample for the current block.