公开(公告)号：US20230239507A1

公开(公告)日：2023-07-27

申请号：US18131113

申请日：2023-04-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/64 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/647 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91 ,  H04N19/513

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information; deriving quantized transform coefficients for a current block based on the residual information included in the bitstream; deriving residual samples for the current block based on the quantized transform coefficients; and generating a reconstructed picture based on the residual samples for the current block.

公开(公告)号：US20230239463A1

公开(公告)日：2023-07-27

申请号：US18127257

申请日：2023-03-28

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Hendry Hendry ,  Jie Zhao ,  Seunghwan Kim

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A video decoding method performed by a video decoding device according to this document comprises the steps of: parsing prediction weighted table syntax from a bitstream; parsing information on the number of reference pictures in a reference picture list from the prediction weighted table syntax; deriving weights for weighted prediction on the basis of the information on the number of reference pictures; deriving prediction samples of a current block by performing weighted prediction for the current block on the basis of the weights; and reconstructing a current picture on the basis of the prediction samples, wherein the prediction weighted table syntax may be parsed from a picture header of the bitstream.

公开(公告)号：US11706426B2

公开(公告)日：2023-07-18

申请号：US17719090

申请日：2022-04-12

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 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 derived as 2. The method includes 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.

公开(公告)号：US11695948B2

公开(公告)日：2023-07-04

申请号：US17745524

申请日：2022-05-16

Applicant: LG ELECTRONICS INC.

Inventor： Jane Zhao ,  Seunghwan Kim

IPC: H04N19/00 ,  H04N19/51 ,  H04N19/176 ,  H04N19/423 ,  H04N19/52 ,  H04N19/503 ,  H04N19/70 ,  H04N19/105 ,  H04N19/55 ,  H04N19/103 ,  H04N19/513

CPC classification number: H04N19/51 ,  H04N19/176 ,  H04N19/423 ,  H04N19/103 ,  H04N19/105 ,  H04N19/503 ,  H04N19/513 ,  H04N19/52 ,  H04N19/55 ,  H04N19/70

Abstract: The disclosure discloses a method for processing a video signal and an apparatus therefor. Specifically, the method of processing a video signal based on an inter prediction, comprising: configuring a merge list based on a neighboring block of a current block; adding a history based merge candidate included in a history based merge candidate list to the merge list when a number of a merge candidate included in the merge list is smaller than a first predetermined number; obtaining a merge index indicating a merge candidate used for an inter prediction of the current block within the merge list; and generating a prediction block of the current block based on motion information of a merge candidate indicated by the merge index, wherein a step of adding the history based merge candidate to the merge list comprises checking whether a second predetermined number of the history based merge candidate within the history based merge candidate list has the same motion information as the merge candidate included in the merge list.

公开(公告)号：US20230209094A1

公开(公告)日：2023-06-29

申请号：US18113231

申请日：2023-02-23

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Hendry Hendry ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/70 ,  H04N19/132 ,  H04N19/174 ,  H04N19/503 ,  H04N19/593

CPC classification number: H04N19/70 ,  H04N19/132 ,  H04N19/174 ,  H04N19/503 ,  H04N19/593

Abstract: A video decoding method performed by a video decoding device according to the present document may comprise the steps of: acquiring image information from a bitstream, wherein the image information includes a picture header associated with a current picture, and the current picture includes multiple slices; on the basis of the picture header, acquiring at least one of a first flag indicating whether information required for an inter-prediction operation exists in the picture header and a second flag indicating whether information required for an intra-prediction operation exists in the picture header; on the basis of at least one of the first flag and the second flag, generating prediction samples by performing at least one of intra-prediction and inter-prediction with respect to a current block in the current picture; generating residual samples on the basis of residual information acquired from the image information; and generating reconstruction samples on the basis of the prediction samples and the residual samples.

公开(公告)号：US11671585B2

公开(公告)日：2023-06-06

申请号：US17320631

申请日：2021-05-14

Applicant: LG Electronics Inc.

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

IPC: H04N11/02 ,  H04N19/105 ,  H04N19/176 ,  H04N19/159

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

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving intra prediction information including at least one of most probable mode (MPM) flag information representing whether to derive an intra prediction mode for a current block based on MPM candidates for the current block or planar flag information representing whether to determine the intra prediction mode for the current block as a planar mode, deriving the intra prediction mode for the current block based on the MPM flag information and the planar flag information, deriving a predicted block for the current block based on the intra prediction mode for the current block, and generating a reconstructed picture based on the predicted block.

公开(公告)号：US11653000B2

公开(公告)日：2023-05-16

申请号：US17737573

申请日：2022-05-05

Applicant: LG ELECTRONICS INC.

Inventor： Seethal Paluri ,  Hendry Hendry ,  Seunghwan Kim ,  Jie Zhao

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/174 ,  H04N19/159 ,  H04N19/132 ,  H04N19/46

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/46 ,  H04N19/70

Abstract: A video decoding method performed by a video decoding device according to the present document may comprise the steps of: acquiring image information from a bitstream, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, at least one of a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header, or a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of at least one of the first flag or the second flag; and generating reconstructed samples on the basis of the prediction samples.

公开(公告)号：US11647232B2

公开(公告)日：2023-05-09

申请号：US17837754

申请日：2022-06-10

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Seethal Paluri ,  Seunghwan Kim

IPC: H04N19/82 ,  H04N19/18

CPC classification number: H04N19/82 ,  H04N19/18

Abstract: According to an image coding method according to embodiments of the present document, information related to in-loop filtering may be efficiently signaled, and repetitive procedures for signaling subpicture-related information may be reduced.

公开(公告)号：US11647202B2

公开(公告)日：2023-05-09

申请号：US17732087

申请日：2022-04-28

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/88 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70 ,  H04N19/88

Abstract: An image decoding method performed by a decoding device, according to the present document, comprises the steps of: receiving a bitstream including residual information of a current block; deriving a specific number of context-encoding bins for context syntax elements for a current sub-block of the current block; decoding the context syntax elements for the current sub-block included in the residual information on the basis of the specific number; deriving transform coefficients for the current sub-block on the basis of the decoded context syntax elements; deriving residual samples for the current block on the basis of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US11641471B2

公开(公告)日：2023-05-02

申请号：US17610985

申请日：2020-05-27

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Jaehyun Lim ,  Junghak Nam ,  Seunghwan Kim

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: An image decoding method according to the present document comprises the steps of: obtaining intra prediction mode information and an LFNST index; deriving an intra prediction mode of a current block on the basis of intra prediction mode information; when wide-angle intra prediction is applied to the current block, deriving a modified intra prediction mode by means of intra prediction mode remapping; deciding an LFNST set comprising LFNST matrices on the basis of the modified intra prediction mode; selecting one of the LFNST matrices on the basis of the LFNST set and LFNST index; and deriving transform coefficients for the current block on the basis of the selected LFNST matrix.