公开(公告)号：US12108044B2

公开(公告)日：2024-10-01

申请号：US17639262

申请日：2020-08-31

Applicant: LG Electronics Inc.

Inventor： Jangwon Choi ,  Junghak Nam

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82

CPC classification number: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82

Abstract: According to one embodiment of the present document, cross-component filter coefficients for cross-component filtering can be derived. Modified filtered reconstructed chroma samples can be generated on the basis of the cross-component filter coefficients. The present embodiment can improve the accuracy of in-loop filtering.

公开(公告)号：US12101464B2

公开(公告)日：2024-09-24

申请号：US17441841

申请日：2020-03-18

Applicant: LG Electronics Inc.

Inventor： Jangwon Choi ,  Jin Heo ,  Seunghwan Kim ,  Jaehyun Lim ,  Ling Li

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

CPC classification number: 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：US12088814B2

公开(公告)日：2024-09-10

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 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  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：US12058318B2

公开(公告)日：2024-08-06

申请号：US18112259

申请日：2023-02-21

Applicant: LG Electronics Inc.

Inventor： Jin Heo ,  Sunmi Yoo ,  Ling Li ,  Jangwon Choi

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

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: An image decoding method according to the present disclosure comprises the steps of: obtaining intra prediction type related information for a current block from a bit stream; deriving the intra prediction type of the current block based on the intra prediction type-related information; obtaining intra prediction mode-related information for the current block from the bitstream; configuring a most probable mode (MPM) list including candidate intra prediction modes for the current block based on neighboring blocks of the current block; deriving the intra prediction mode of the current block based on the MPM list and the intra prediction mode-related information; and generating a predicted block of the current block based on the intra prediction type and the intra prediction mode, wherein when the intra prediction type indicates the particular intra prediction type, the MPM index is parsed from the bit stream without parsing of an MPM flag.

公开(公告)号：US20240251107A1

公开(公告)日：2024-07-25

申请号：US18618641

申请日：2024-03-27

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Jungah Choi ,  Jin Heo ,  Jangwon Choi

IPC: H04N19/70 ,  H04N19/132 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

CPC classification number: H04N19/70 ,  H04N19/132 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

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：US12015779B2

公开(公告)日：2024-06-18

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

CPC classification number: H04N19/136 ,  H04N19/176 ,  H04N19/1883 ,  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.

公开(公告)号：US12010349B2

公开(公告)日：2024-06-11

申请号：US18097922

申请日：2023-01-17

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Jangwon Choi

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/139 ,  H04N19/18 ,  H04N19/186 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/18 ,  H04N19/186 ,  H04N19/70 ,  H04N19/96 ,  H04N19/139

Abstract: According to one embodiment of the present document, filtering for chroma blocks can be performed on the basis of luma blocks. For example, a cross component adaptive loop filtering process can be performed. Therefore, the accuracy of in-loop filtering can be improved.

公开(公告)号：US11991357B2

公开(公告)日：2024-05-21

申请号：US17977892

申请日：2022-10-31

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Jin Heo ,  Sunmi Yoo ,  Jungah Choi ,  Seung Hwan Kim

IPC: H04N19/159 ,  H04N19/103 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593 ,  H04N19/96

CPC classification number: 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 structure of a current block composed of chroma components, determining a splitting type of the current block based on the splitting structure, obtaining a plurality of lower-layer blocks by splitting the current block based on the splitting type, and decoding the lower-layer blocks based on a prediction mode of the lower-layer blocks.

公开(公告)号：US11979608B2

公开(公告)日：2024-05-07

申请号：US17283906

申请日：2019-10-07

Applicant: LG Electronics Inc.

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

IPC: H04N11/02 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

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：US11943434B2

公开(公告)日：2024-03-26

申请号：US17667957

申请日：2022-02-09

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Seunghwan Kim ,  Jin Heo

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/593

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/593

Abstract: A method for image decoding performed by a decoding device includes: deriving a specific value for a current chroma block; when a width and a height of the current chroma block have a value equal to or greater than the specific value, deriving upper peripheral chroma samples of a number equal to the specific value of the current chroma block and left peripheral chroma samples of a number equal to the specific value; deriving CCLM parameters on the basis of the upper peripheral chroma samples, the left peripheral chroma samples, and down-sampled peripheral luma samples; and deriving prediction samples for the current chroma block on the basis of the down-sampled luma samples and the CCLM parameters, where the derived specific value is 2.