公开(公告)号：US20230319311A1

公开(公告)日：2023-10-05

申请号：US18133799

申请日：2023-04-12

Applicant: LG ELECTRONICS INC.

Inventor： Seunghwan KIM ,  Medhi Salehifar ,  Moonmo Koo ,  Jaehyun Lim

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/11 ,  H04N19/593

CPC classification number: H04N19/61 ,  H04N19/11 ,  H04N19/176 ,  H04N19/593

Abstract: The present disclosure, in a method of decoding a video signal, provides a method including checking whether a transform skip is applied to a current block; acquiring a transform index indicating transform types applied to a horizontal direction and a vertical direction of the current block from among a plurality of predefined transform types from the video signal when the transform skip is not applied to the current block; and performing an inverse primary transform on the current block using the transform types indicated by the transform index, wherein the transform types applied to the horizontal direction and the vertical direction of the current block are determined from among transform types defined according to an intra prediction mode of the current block based on the transform index.

公开(公告)号：US11765357B2

公开(公告)日：2023-09-19

申请号：US17675716

申请日：2022-02-18

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method carried out by a decoding apparatus according to the present document comprises the steps of: acquiring, via a bitstream, image data comprising residual data, and prediction mode data for the current block; deriving the prediction mode of the current block on the basis of the prediction mode data; deriving prediction samples for the current block on the basis of the prediction mode; deriving residual samples for the current block on the basis of the residual data; and generating reconstructed samples for the current block on the basis of the prediction samples and residual samples.

公开(公告)号：US11750849B2

公开(公告)日：2023-09-05

申请号：US17577785

申请日：2022-01-18

Applicant: LG ELECTRONICS INC.

Inventor： Junghak Nam ,  Seunghwan Kim ,  Jaehyun Lim ,  Hyeongmoon Jang

IPC: H04N19/00 ,  H04N19/96 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/96 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70

Abstract: Disclosed are a method for decoding a video signal and an apparatus therefor. Specifically, a method for decoding an image may include: partitioning a current coding tree block into a plurality of coding blocks so that coding blocks partitioned from the current coding tree block are included in a current picture when the current coding tree block is out of a boundary of the current picture; parsing a first syntax element indicating whether a current coding block is partitioned into a plurality of subblocks when the current coding block satisfies a predetermined condition; and determining a split mode of the current coding block based on the syntax element.

公开(公告)号：US11743494B2

公开(公告)日：2023-08-29

申请号：US17853169

申请日：2022-06-29

Applicant: LG Electronics Inc.

Inventor： Hendry Hendry ,  Seungwook Park ,  Jaehyun Lim ,  Yongjoon Jeon ,  Chulkeun Kim ,  Jungsun Kim ,  Naeri Park ,  Byeongmoon Jeon ,  Joonyoung Park

IPC: H04N19/00 ,  H04N19/577 ,  H04N19/503 ,  H04N19/46 ,  H04N19/70 ,  H04N19/423 ,  H04N19/573 ,  H04N19/44

CPC classification number: H04N19/577 ,  H04N19/423 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/573 ,  H04N19/70

Abstract: The present invention relates to a method for signaling image information and to a decoding method using same. The method for signaling image information according to the present invention comprises: a step of performing inter-prediction for a current picture; and a step of signaling information including the result of said inter-prediction and reference picture information indicating reference pictures usable in said inter prediction, wherein said reference picture information contains pieces of picture order count (POC) information of said usable reference pictures. The POC information of said usable reference pictures in said reference picture information is configured such that POCs for the pictures existing before said current picture in terms of a POC sequence are located at the front, and POCs for the pictures existing after said current picture in terms of a POC sequence are located following the POCs located at the front.

公开(公告)号：US11711549B2

公开(公告)日：2023-07-25

申请号：US17563135

申请日：2021-12-28

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Byeongmoon Jeon ,  Yongjoon Jeon ,  Seungwook Park ,  Jungsun Kim ,  Joonyoung Park ,  Jaehyun Lim ,  Naeri Park ,  Chulkeun Kim

IPC: H04N19/91 ,  H04N19/436 ,  H04N21/6336 ,  H04N19/184 ,  H04N19/70 ,  H04N19/96 ,  H04N19/174 ,  H04N19/13 ,  H04N19/124

CPC classification number: H04N19/91 ,  H04N19/13 ,  H04N19/174 ,  H04N19/184 ,  H04N19/436 ,  H04N19/70 ,  H04N19/96 ,  H04N21/6336 ,  H04N19/124

Abstract: A video encoding method includes deriving entry point information specifying an entry point of a substream for a picture. The entry point information may include a number syntax element representing a number of offset syntax elements in a slice header; an offset syntax element representing an entry point offset between in bytes two entry points; and a length syntax element representing a bits length of the offset syntax element. A value of the length syntax element plus one corresponds to the bits length of the offset syntax element and the length syntax element is signaled when the number of the offset syntax elements is larger than 0. A value of the number syntax element corresponds to the number of offset syntax elements in the slice header, and the offset syntax element is signaled when the number of the offset syntax elements is larger than 0.

公开(公告)号：US11706420B2

公开(公告)日：2023-07-18

申请号：US17214289

申请日：2021-03-26

Applicant: LG Electronics Inc.

Inventor： Jaehyun Lim ,  Byeongmoon Jeon ,  Yongjoon Jeon ,  Seungwook Park ,  Jungsun Kim ,  Joonyoung Park ,  Hendry Hendry ,  Naeri Park ,  Chulkeun Kim

IPC: H04N19/122 ,  H04N19/136 ,  H04N19/50 ,  H04N19/96 ,  H04N19/91 ,  H04N19/44 ,  H04N19/174 ,  H04N19/176 ,  H04N19/13

CPC classification number: H04N19/136 ,  H04N19/174 ,  H04N19/44 ,  H04N19/50 ,  H04N19/91 ,  H04N19/96 ,  H04N19/13 ,  H04N19/176

Abstract: The present invention relates to an entropy decoding method which includes: generating context related to a bin that forms a codeword of a syntax element; and performing arithmetic decoding of the bin based on the context.

公开(公告)号：US11700394B2

公开(公告)日：2023-07-11

申请号：US17379108

申请日：2021-07-19

Applicant: LG Electronics Inc.

Inventor： Jaehyun Lim ,  Seungwook Park ,  Yongjoon Jeon ,  Jungsun Kim ,  Hendry Hendry ,  Byeongmoon Jeon ,  Joonyoung Park ,  Chulkeun Kim ,  Naeri Park

IPC: H04N19/593 ,  H04N19/426 ,  H04N19/176 ,  H04N19/11 ,  H04N19/463 ,  H04N19/117 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/159 ,  H04N19/174 ,  H04N19/44 ,  H04N19/61 ,  H04N19/625 ,  H04N19/82 ,  H04N19/96

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/117 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/426 ,  H04N19/44 ,  H04N19/463 ,  H04N19/61 ,  H04N19/625 ,  H04N19/82 ,  H04N19/96

Abstract: A method for intra prediction comprises determining a first MPM candidate corresponding to a left-side candidate block on the basis of a position of the left-side candidate block adjacent to a left side of a current block; determining a second MPM candidate corresponding to an upper-end candidate block on the basis of a position of the upper-end candidate block adjacent to an upper end of the current block; generating an MPM candidate list including a plurality of MPM candidates, on the basis of the first MPM candidate and the second MPM candidate; and determining one MPM candidate of the plurality of the MPM candidates that constitute the MPM candidate list as an intra prediction mode of the current block, and performing intra prediction for the current block on the basis of the determined intra prediction mode to generate a prediction block corresponding to the current block.

公开(公告)号：US11616985B2

公开(公告)日：2023-03-28

申请号：US17034949

申请日：2020-09-28

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Mehdi Salehifar ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/625 ,  H04N19/129 ,  H04N19/176 ,  H04N19/18

Abstract: The present disclosure provides a method of reconstructing a video signal based on a reduced secondary transform, which includes: obtaining a secondary transform index from the video signal; deriving a secondary transform corresponding to the secondary transform index, wherein the secondary transform represents a reduced secondary transform, and the reduced secondary transform represents a transform outputting L (L

公开(公告)号：US20230078291A1

公开(公告)日：2023-03-16

申请号：US17985577

申请日：2022-11-11

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/61 ,  H04N19/122 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: An image decoding method according to the present document may include the steps of: deriving the position of the final significant coefficient in the current block and transform coefficients for the current block on the basis of residual information; determining whether the index of a sub-block including the final significant coefficient is 0 and whether the position of the final significant coefficient in the sub-block is greater than 0; determining whether a significant coefficient exists in a second area excluding a first area at the upper left end of the current block; and parsing an LFNST index from a bitstream when the position of the final significant coefficient is determined to be greater than 0 in the sub-block in which the index is 0, and the significant coefficient does not exist in the second area.

公开(公告)号：US11606557B2

公开(公告)日：2023-03-14

申请号：US17343274

申请日：2021-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Bumshik Lee ,  Moonmo Koo ,  Jaehyun Lim

IPC: H04N19/176 ,  H04N19/61 ,  H04N19/625 ,  H04N19/12

Abstract: The present disclosure relates to a method for processing a video signal by using a linear relationship between transform types, comprising the steps of: determining a transform group on the basis of a prediction mode of a current block; parsing a transform combination index from a video signal, wherein the transform combination index indicates anyone of a plurality of transform combinations in the transform group; deriving a transform combination corresponding to the transform combination index, wherein the transform combination consists of a horizontal transform and a vertical transform, and includes DST-7 or DCT-8; performing inverse transform on the current block on the basis of the transform combination; and restoring the video signal by using the inverse transformed current block.