公开(公告)号：US20230164355A1

公开(公告)日：2023-05-25

申请号：US17916466

申请日：2021-03-30

Applicant: LG Electronics Inc.

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

IPC: H04N19/60 ,  H04N19/124 ,  H04N19/176 ,  H04N19/11

CPC classification number: H04N19/60 ,  H04N19/124 ,  H04N19/176 ,  H04N19/11

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: acquiring a dependent quantization available flag about whether dependent quantization is available; acquiring a sign data hiding available flag about whether sign data hiding is available; and acquiring, on the basis of the dependent quantization available flag and the sign data hiding available flag, a transform skip residual coding (TSRC) available flag about whether TSRC is available.

公开(公告)号：US20230156199A1

公开(公告)日：2023-05-18

申请号：US18098382

申请日：2023-01-18

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

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

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

Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: deriving prediction samples for a first sample and a second sample of the current block on the basis of BDPCM-related information about the current block and neighboring samples of the current block; deriving residual samples for the first sample and the second sample on the basis of a residual coefficient of the first sample and a modified residual coefficient of the second sample; and storing, as the intra prediction mode of the current block, the intra prediction mode in the prediction direction of the current block, which is derived on the basis of a BDPCM direction flag.

公开(公告)号：US20230086768A1

公开(公告)日：2023-03-23

申请号：US17797924

申请日：2021-02-05

Applicant: LG Electronics Inc.

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

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

Abstract: A method, performed by a decoding device, for decoding an image according to the present document comprises the steps of: acquiring residual information of a current block; deriving residual samples of the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20230021515A1

公开(公告)日：2023-01-26

申请号：US17849296

申请日：2022-06-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/593 ,  H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/159 ,  H04N19/11 ,  H04N19/132 ,  H04N19/136

Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: obtaining a Block-based Delta Pulse Code Modulation (BDPCM) available flag indicating whether or not BDPCM is available for a chroma block and a luma block; obtaining BDPCM-related information for a current luma block and current chroma blocks on the basis of the BDPCM available flag; and generating reconstructed samples for the current luma block and the current chroma blocks on the basis of the BDPCM-related information.

公开(公告)号：US20230007267A1

公开(公告)日：2023-01-05

申请号：US17894762

申请日：2022-08-24

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: obtaining a sign data hiding availability flag indicating whether or not sign data hiding is available for a current slice; obtaining a TSRC availability flag indicating whether or not TSRC is available for a transform skip block of the current slice; obtaining residual coding information about the transform skip block on the basis of the TSRC availability flag; deriving a residual sample for the transform skip block on the basis of the residual coding information; and generating a reconstruction picture on the basis of the residual sample, wherein the TSRC availability flag is obtained on the basis of the sign data hiding availability flag.

公开(公告)号：US20220417517A1

公开(公告)日：2022-12-29

申请号：US17373522

申请日：2021-07-12

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/117 ,  H04N19/82 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method according to the present disclosure comprises the steps of: deriving downsampled luma samples and downsampled peripheral luma samples on the basis of a current luma block and peripheral samples of the current luma block; and deriving a cross-component linear model (CCLM) parameter on the basis of the downsampled peripheral luma samples and peripheral chroma samples of a current chroma block, wherein the peripheral chroma samples include left peripheral chroma samples of the current chroma block and upper peripheral chroma samples of the current chroma block, and the downsampled peripheral luma samples include two downsampled left peripheral luma samples related to the left peripheral chroma samples and two downsampled upper peripheral luma samples related to the upper peripheral chroma samples.

公开(公告)号：US20220377330A1

公开(公告)日：2022-11-24

申请号：US17882025

申请日：2022-08-05

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Jungah CHOI ,  Seung Hwan KIM

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining a splitting type of a current block, splitting the current block into a plurality of lower-layer blocks based on the splitting type, and decoding the lower-layer blocks. In this case, the current block may be a chroma block, and the determining the splitting type of the current block may be performed by disallowing a predetermined splitting type having a width or height of the lower-layer blocks being a predetermined value, among a plurality of splitting types.

公开(公告)号：US20220353506A1

公开(公告)日：2022-11-03

申请号：US17765979

申请日：2020-10-05

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI

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

Abstract: According to the disclosure of the present document, dependency conditions can be defined for efficiently parsing/signaling syntax elements having dependency on transform skip- and/or palette coding-related information, and, on the basis of the dependency conditions, whether or not to parse the transform skip- and/or palette coding-related information can be determined. 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：US20220321887A1

公开(公告)日：2022-10-06

申请号：US17765935

申请日：2020-10-05

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI

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

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：US20220312015A1

公开(公告)日：2022-09-29

申请号：US17834500

申请日：2022-06-07

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46 ,  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 a block-based delta pulse code modulation (BDPCM) available flag about whether a BDPCM is available for a chroma block and a luma block; acquiring, on the basis of the BDPCM available flag, a BDPCM luma flag about whether to apply the BDPCM to the current luma block; and acquiring, on the basis of the BDPCM available flag, a BDPCM chroma flag about whether to apply the BDPCM to the current chroma blocks.