公开(公告)号：US20240107034A1

公开(公告)日：2024-03-28

申请号：US18511346

申请日：2023-11-16

Applicant: LG Electronics Inc.

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

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

CPC classification number: H04N19/18 ,  H04N19/184 ,  H04N19/70

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：US20240089470A1

公开(公告)日：2024-03-14

申请号：US18517527

申请日：2023-11-22

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：US20240031604A1

公开(公告)日：2024-01-25

申请号：US17801939

申请日：2021-02-25

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/60 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus according to the present document is characterized by comprising the steps of: acquiring image information; and generating a reconstructed picture on the basis of the image information.

公开(公告)号：US20230276052A1

公开(公告)日：2023-08-31

申请号：US18142804

申请日：2023-05-03

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

Abstract: A method for performing video decoding by a decoding device 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：US20230119780A1

公开(公告)日：2023-04-20

申请号：US17987732

申请日：2022-11-15

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include identifying a prediction mode of a current block, determining a candidate intra prediction mode for the current block, based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block being an intra prediction mode, generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode, and determine an intra prediction mode of the current block based on the candidate intra prediction mode list. In this case, the candidate intra prediction mode may be determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode.

公开(公告)号：US20230079866A1

公开(公告)日：2023-03-16

申请号：US17797925

申请日：2021-02-05

Applicant: LG Electronics Inc.

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

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring prediction-related information for a current block; acquiring a dependent quantization enable flag related to whether dependent quantization is available; acquiring, on the basis of the dependent quantization enable flag, a transform skip residual coding (TSRC) enable flag related to whether TSRC is available; acquiring residual information of residual coding syntax for the current block, which has been derived on the basis of the TSRC enable flag; deriving motion information of the current block on the basis of the prediction-related information; deriving a prediction sample of the current block on the basis of the motion information; 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 prediction sample and the residual sample.

公开(公告)号：US20230024570A1

公开(公告)日：2023-01-26

申请号：US17946807

申请日：2022-09-16

Applicant: LG Electronics Inc.

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

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/136 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include parsing, from a bitstream, first information specifying whether block difference pulse code modulation (BDPCM) applies to an intra-predicted current block, determining a prediction direction of BDPCM for the current block and generating a residual block of the current block based on the determined prediction direction of BDPCM, based on the first information specifying that BDPCM applies to the current block, generating a prediction block of the current block, by performing intra prediction based on an intra prediction mode of the current block, and reconstructing the current block based on the residual block and the prediction block.

公开(公告)号：US20220408095A1

公开(公告)日：2022-12-22

申请号：US17894026

申请日：2022-08-23

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring a transform skip available flag; acquiring a TSRC available flag on the basis of the transform skip available flag; acquiring prediction-related information regarding a current block; deriving a prediction sample of the current block on the basis of the prediction-related information; acquiring residual information of a residual coding syntax for the current block, derived on the basis of the TSRC available 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 prediction sample and the residual sample.

公开(公告)号：US20220385925A1

公开(公告)日：2022-12-01

申请号：US17882934

申请日：2022-08-08

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image decoding method according to the present document 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 reconstructed picture on the basis of the residual sample for the current block, wherein the residual information may be derived via different syntax elements depending on whether a transform has been applied to the current block.

公开(公告)号：US20220377345A1

公开(公告)日：2022-11-24

申请号：US17765740

申请日：2020-10-06

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/136 ,  H04N19/169 ,  H04N19/176 ,  H04N19/70

Abstract: A video decoding method performed by a decoding apparatus according to the present document may comprise the steps of: acquiring, from a bitstream, information indicating a level value of a transform coefficient in a current block; deriving a Rice parameter for the information indicating the level value of the transform coefficient, on the basis of a quantization parameter of the current block; deriving a bin string for the information indicating the level value of the transform coefficient, on the basis of the Rice parameter; and deriving the level value of the transform coefficient on the basis of the bin string.