公开(公告)号：US20210211667A1

公开(公告)日：2021-07-08

申请号：US17207162

申请日：2021-03-19

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/122 ,  H04N19/136 ,  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：US20200374516A1

公开(公告)日：2020-11-26

申请号：US16769429

申请日：2017-12-04

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Junghak NAM ,  Sunmi YOO ,  Jangwon CHOI

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61 ,  H04N19/44 ,  H04N19/625

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises a step of obtaining information on an intra prediction mode of a current chroma block and a transform coefficients, a step of generating a prediction sample based on the intra prediction mode of the current chroma block, a step of generating a residual sample using the transform coefficients of the current chroma block based on the transform information of the corresponding luma block of the current chroma block, and a step of generating a reconstruction sample based on the prediction sample and the residual sample.

公开(公告)号：US20200177878A1

公开(公告)日：2020-06-04

申请号：US16625975

申请日：2018-03-19

Applicant: LG ELECTRONICS INC

Inventor： Jangwon CHOI ,  Jaehyun LIM

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/593 ,  H04N19/176 ,  H04N19/159 ,  H04N19/186

Abstract: Disclosed are an intra-prediction mode-based image processing method and apparatus. In particular, the intra-prediction mode-based image processing method may comprise the steps of: generating a first prediction sample by performing spatial prediction on a current chroma block; determining whether or not a combined intra-prediction mode is applicable to the current chroma block; when the combined intra-prediction mode is applicable to the current chroma block, determining a component prediction mode used for inter-component prediction of the current chroma block; generating a second prediction sample by applying the determined component prediction mode to the current chroma block; and generating a final prediction sample of the current chroma block by using the first prediction sample and the second prediction sample.

公开(公告)号：US20200021806A1

公开(公告)日：2020-01-16

申请号：US16507558

申请日：2019-07-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/46

Abstract: Provided is a video decoding method performed by a decoding apparatus, which includes: obtaining intra prediction information of the current block through a bitstream; deriving MPM (Most Probable Mode) list including MPM candidates of the current block; when a value of a MPM flag is 0, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, in which the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates; deriving a prediction sample of the current block based on the intra prediction mode; and deriving a reconstructed picture based on the prediction sample, in which the intra prediction information includes the MPM flag, the intra prediction information includes the remaining intra prediction mode information when the value of the MPM flag is 0, the MPM flag is coded through a fixed length (FL) binarization process, a binarization parameter for the FL binarization process is 1, the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and a binarization parameter for the TB binarization process is 60.

公开(公告)号：US20250080754A1

公开(公告)日：2025-03-06

申请号：US18293202

申请日：2022-08-18

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jaehyun LIM ,  Nae Ri PARK ,  Sunmi YOO ,  Jung Hak NAM ,  Hyeong Moon JANG

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176

Abstract: Provided are an image encoding/decoding method and apparatus. An image decoding method performed by an image decoding apparatus may comprise determining an intra prediction mode of a current block, performing planar intra prediction based on the intra prediction mode being a planar prediction mode and obtaining a reconstructed sample of the current block based on a prediction sample obtained based on the planar intra prediction. The performing the planar intra prediction may comprise applying filtering to an intra prediction reference sample of the current block.

公开(公告)号：US20250080720A1

公开(公告)日：2025-03-06

申请号：US18726662

申请日：2022-12-28

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Jaehyun LIM ,  Sunmi YOO ,  Junghak NAM ,  Hyeongmoon JANG ,  Jangwon CHOI

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

Abstract: An image encoding/decoding method and device according to the present disclosure can generate a candidate list of a current block, add an average candidate to the candidate list of the current block, and perform inter-prediction on the current block on the basis of the candidate list including the average candidate. Here, the candidate list includes a plurality of affine candidates, the plurality of affine candidates include at least one from among an inherited candidate, a constructed candidate, and a history-based candidate, and the average candidate can be generated on the basis of two affine candidates selected according to a predetermined priority from the candidate list.

公开(公告)号：US20250071285A1

公开(公告)日：2025-02-27

申请号：US18932879

申请日：2024-10-31

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI

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

Abstract: According to disclosures of the present document, dependency conditions can defined for effectively parsing/signaling syntax elements having dependency to transform skip- and/or palette coding-related data, and, on the basis of the dependency conditions, whether or not to parse the transform skip- and/or palette coding-related data can be determined. As a result, bits necessary to be signaled for video/image coding can be reduced and coding efficiency can be improved.

公开(公告)号：US20250063179A1

公开(公告)日：2025-02-20

申请号：US18724568

申请日：2022-12-30

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jaehyun LIM ,  Sunmi YOO ,  Jungah CHOI

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/186 ,  H04N19/196

Abstract: Provided are an image encoding/decoding method and apparatus. An image decoding method may comprise deriving chroma reference samples located around a chroma block and luma reference samples corresponding to the chroma reference samples based on an intra prediction mode of the chroma block being a cross-component linear model (CCLM) mode, deriving CCLM parameters based on the chroma reference samples and the luma reference samples, and generating a prediction sample of the chroma block based on the CCLM parameters. The chroma reference samples may be obtained from two or more chroma reference lines adjacent to the chroma block.

公开(公告)号：US20250008111A1

公开(公告)日：2025-01-02

申请号：US18703583

申请日：2022-10-18

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI

IPC: H04N19/159 ,  H04N19/129 ,  H04N19/172 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus, according to the present disclosure, comprises the steps of: selecting, from among residual coefficients of a current block, specific residual coefficients for sine prediction in a scan order; predicting sines for the specific residual coefficients; deriving residual samples of the current block on the basis of the predicted sines; and generating a reconstructed picture on the basis of the residual samples, wherein the scan order is derived on the basis of an intra prediction mode which has been applied to the current block.

公开(公告)号：US20240406383A1

公开(公告)日：2024-12-05

申请号：US18804497

申请日：2024-08-14

Applicant: LG Electronics Inc.

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

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

Abstract: A method for decoding an image by a decoding device according to the present document comprises the steps of receiving prediction-related information of a current block; deriving an intra prediction type of the current block on the basis of the prediction-related information; forming an intra prediction mode candidate list of the current block on the basis of intra prediction modes of blocks neighboring the current block; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and deriving reference samples of the current block on the basis of the intra prediction type and the intra prediction mode, and deriving a prediction sample on the basis of the reference samples.