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.

公开(公告)号：US20240357130A1

公开(公告)日：2024-10-24

申请号：US18701082

申请日：2022-12-09

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Jaehyun LIM ,  Junghak NAM ,  Jangwon CHOI

IPC: H04N19/159 ,  H04N19/117 ,  H04N19/139 ,  H04N19/176 ,  H04N19/59 ,  H04N19/80

CPC classification number: H04N19/159 ,  H04N19/117 ,  H04N19/139 ,  H04N19/176 ,  H04N19/59 ,  H04N19/80

Abstract: An image decoding method performed by a decoding device, according to the present disclosure, comprises the steps of: deriving an intra block copy (IBC) mode as a prediction mode of a current block; deriving one or more block vectors and/or scaling information for the IBC mode; deriving a revised reference block for the current block by using the one or more block vectors and/or the scaling information in a current picture; deriving a prediction sample of the current block on the basis of the revised reference block; and generating a reconstructed picture on the basis of the prediction sample.

公开(公告)号：US20240283936A1

公开(公告)日：2024-08-22

申请号：US18569068

申请日：2022-07-01

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/136 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/136 ,  H04N19/186 ,  H04N19/70

Abstract: Provided are an image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium which stores a bitstream. An image decoding method according to the present disclosure may be an image decoding method performed by an image decoding device, the method comprising the steps of: determining whether a cross component sample adaptive offset (CC-SAO) is activated, on the basis of a value of a first syntax element; deriving collocated luma samples and collocated chroma samples corresponding to each other from reconstructed samples on the basis of a chroma format of the reconstructed samples, on the basis of the value of the first syntax element specifying that the CC-SAO is activated; and determining an offset to be applied to the reconstructed samples on the basis of the collocated luma samples and the collocated chroma samples.

公开(公告)号：US20240275992A1

公开(公告)日：2024-08-15

申请号：US18596372

申请日：2024-03-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/186 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176

CPC classification number: H04N19/186 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176

Abstract: A video decoding method performed by a decoding apparatus according to the present disclosure includes deriving one of a plurality of cross-component linear model (CCLM) prediction mode as a CCLM prediction mode of the current chroma block, deriving a sample number of neighboring chroma samples of the current chroma block based on the CCLM prediction mode of the current chroma block, a size of the current chroma block, and a specific value; deriving the neighboring chroma samples of the sample number, calculating CCLM parameters based on the neighboring chroma samples and the down sampled neighboring luma samples, deriving prediction samples for the current chroma block based on the CCLM parameters and the down sampled luma samples and generating reconstructed samples for the current chroma block based on the prediction samples, wherein the specific value is derived as 2.

公开(公告)号：US20240244257A1

公开(公告)日：2024-07-18

申请号：US18391092

申请日：2023-12-20

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176

Abstract: An image decoding method according to the present document comprises the steps of: acquiring, from a bitstream, reference line index information indicating a reference line to be used for intra prediction of a current block; constructing a most probable mode (MPM) list by deriving candidate intra prediction modes of the current block on the basis of the value of the reference line index information; deriving the intra prediction mode of the current block on the basis of the MPM list; generating prediction samples for the current block on the basis of the intra prediction mode; and generating restoration samples for the current block on the basis of the prediction samples, wherein, on the basis of the case in which the value of the reference line index information is not zero, one of the candidate intra prediction modes is a DC mode and the number of candidate intra prediction modes including the DC mode is 5.

公开(公告)号：US20240236315A1

公开(公告)日：2024-07-11

申请号：US18612610

申请日：2024-03-21

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Junghak NAM

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/169 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/50 ,  H04N19/70 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/1883 ,  H04N19/50 ,  H04N19/70 ,  H04N19/80

Abstract: According to one embodiment of the present document, an in-loop filtering procedure in an image/video coding procedure may comprise a cross-component adaptive loop filtering procedure. CCALF, according to the present embodiment, can increase the accuracy of in-loop filtering.

公开(公告)号：US20240205444A1

公开(公告)日：2024-06-20

申请号：US18593762

申请日：2024-03-01

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/46 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/46 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring image information including a Block-based Delta Pulse Code Modulation (BDPCM) available flag; and generating a reconstructed picture on the basis of the image information, wherein the BDPCM available flag relates to whether BDPCM is available for chroma and luma blocks.