公开(公告)号：US20240414374A1

公开(公告)日：2024-12-12

申请号：US18703597

申请日：2022-10-20

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Seunghwan KIM ,  Moonmo KOO ,  Jie ZHAO ,  Jaehyun LIM ,  Jangwon CHOI

IPC: H04N19/60 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: According to the disclosure of the present document, by configuring a primary transform to include a non-separable transform, higher encoding efficiency may be expected compared to the existing primary transform including only a separable transform. Also, by efficiently signaling information related to a primary transform including a separable transform and a non-separable transform, the effect of reducing the number of bits and improving coding performance may be expected. In addition, by efficiently applying a primary transform and a secondary transform, computational complexity and power consumption may be reduced, and latency required for additionally generated transform coefficient processing may be minimized.

公开(公告)号：US20240406387A1

公开(公告)日：2024-12-05

申请号：US18723772

申请日：2023-01-02

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Hyeong Moon JANG ,  Sunmi YOO ,  Jungah CHOI

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

Abstract: An image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium for storing a bitstream are provided. The image decoding method according to the present disclosure is an image decoding method performed by an image decoding device, and may comprise the steps of: deriving multiple direct mode (DM) candidates for a chroma block; determining one DM candidate among the multiple DM candidates on basis of first information; and performing intra prediction of the chroma block on the basis of the determined DM candidate, wherein default modes for the chroma block are modified on the basis of whether same are identical to the multiple DM candidates.

公开(公告)号：US20240380901A1

公开(公告)日：2024-11-14

申请号：US18771179

申请日：2024-07-12

Applicant: LG Electronics Inc.

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

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

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining, through a bitstream, image information including a motion information candidate index and residual information; deriving motion information of a current block on the basis of the motion information candidate index; deriving a prediction sample on the basis of the motion information; deriving, on the basis of residual syntax elements for a current residual coefficient in the current block, the current residual coefficient; deriving a residual sample on the basis of the current residual coefficient; and deriving a reconstruction sample of the current block on the basis of the prediction sample and the residual sample.

公开(公告)号：US20240305823A1

公开(公告)日：2024-09-12

申请号：US18623644

申请日：2024-04-01

Applicant: LG Electronics Inc.

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

IPC: H04N19/60 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18

CPC classification number: H04N19/60 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18

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 restoration picture on the basis of the residual sample for the current block, wherein the residual information includes position information for indicating the position of a transform coefficient, which is not the last 0 in a transform block, and the position information can be derived if a transform skip is not applied to the transform block.

公开(公告)号：US20240297984A1

公开(公告)日：2024-09-05

申请号：US18662464

申请日：2024-05-13

Applicant: LG Electronics Inc.

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

IPC: H04N19/105 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/18 ,  H04N19/1883 ,  H04N19/70

Abstract: A video decoding method performed by a decoding apparatus according to the present document may comprise the steps of: obtaining, from a bitstream, information indicating a level value of a transform coefficient in a current block; selecting one Rice parameter look-up table for the information indicating the level value of the transform coefficient, from among a plurality of Rice parameter look-up tables; deriving a Rice parameter for the information indicating the level value of the transform coefficient on the basis of the selected Rice parameter look-up table; 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.

公开(公告)号：US20240291977A1

公开(公告)日：2024-08-29

申请号：US18569032

申请日：2022-08-03

Applicant: LG Electronics Inc.

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

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/82

Abstract: Provided are an image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium that stores a bitstream. The image decoding method according to the present disclosure is performed by an image decoding apparatus, and comprises the steps of: applying deblocking filtering to reconstructed samples; and deriving a modified luma sample and modified chroma samples by applying one or more of sample adaptive offset (SAO) filtering and cross component sample adaptive offset (CC-SAO) filtering to the reconstructed samples to which the deblocking filtering has been applied, wherein the modified luma sample is derived by applying the SAO filtering to a luma sample to which the deblocking filtering has been applied, and the modified chroma samples are derived by applying the SAO filtering to chroma samples to which the deblocking filtering has been applied, and applying the CC-SAO filtering to chroma samples to which the deblocking filtering has been applied and a luma sample to which first in-loop filtering has been applied.

公开(公告)号：US20240121440A1

公开(公告)日：2024-04-11

申请号：US18393285

申请日：2023-12-21

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/70 ,  H04N19/12 ,  H04N19/176 ,  H04N19/61

CPC classification number: H04N19/70 ,  H04N19/12 ,  H04N19/176 ,  H04N19/61

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

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.