公开(公告)号：US20200221084A1

公开(公告)日：2020-07-09

申请号：US16624734

申请日：2018-06-19

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/117 ,  H04N19/593 ,  H04N19/70 ,  H04N19/176 ,  H04N19/159

Abstract: The present invention provides an image processing method on the basis of an intra prediction mode and an apparatus therefor. Specifically, a method for processing an image on the basis of an intra prediction mode may comprise the steps of: identifying whether weighted intra prediction is allowed for a current block and whether the weight intra prediction is applied to the current block; identifying whether reference sample filtering is applied to the current block when the weighted intra prediction is not allowed for the current block or when the weighted intra prediction is not applied to the current block; and performing reference sample filtering of reference samples neighboring the current block when the reference sample filtering is applied.

公开(公告)号：US20200177889A1

公开(公告)日：2020-06-04

申请号：US16496319

申请日：2018-01-31

Applicant: LG Electronics Inc.

Inventor： Seunghwan KIM ,  Hyeongmoon JANG ,  Jaehyun LIM

IPC: H04N19/176 ,  H04N19/122 ,  H04N19/124 ,  H04N19/18 ,  H04N19/593 ,  H04N19/159 ,  H04N19/13

Abstract: A transform method, according to the present invention, comprises the steps of: obtaining transform coefficients for a target block; determining a non-separable secondary transform (NSST) set for the target block; selecting one of a plurality of NSST kernels included in the NSST set on the basis of an NSST index; and generating modified transform coefficients by non-separable secondary-transform of the transform coefficients on the basis of the NSST kernel that has been selected, wherein the NSST set for the target block is determined on the basis of an intra-prediction mode and/or the size of the target block. According to the present invention, the amount of data transmitted, which is required for residual processing, can be reduced and residual coding efficiency can be increased.

公开(公告)号：US20200177882A1

公开(公告)日：2020-06-04

申请号：US16709471

申请日：2019-12-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/136 ,  H04N19/60 ,  H04N19/124

Abstract: An image decoding method includes receiving residual information including first size related information for a first residual coefficient and second size related information for a second residual coefficient, setting a Rice parameter of the first size related information and the second size related information as a specific value, deriving available binary values based on the Rice parameter, deriving binary values of the first size related information and the second size related information by decoding the first size related information and the second size related information, deriving values of the first size related information and the second size related information by comparing the binary values and the available binary values, deriving the first residual coefficient and the second residual coefficient based on the values, and reconstructing a current picture based on the first residual coefficient and the second residual coefficient.

公开(公告)号：US20200162743A1

公开(公告)日：2020-05-21

申请号：US16628420

申请日：2018-03-14

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Seunghwan KIM ,  Jungdong SEO ,  Jaeho LEE ,  Hyeongmoon JANG

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/513 ,  H04N19/105 ,  H04N19/139

Abstract: Disclosed herein are an inter prediction mode-based image processing method and an apparatus therefor. Specifically, a method for processing an image based on an inter prediction mode may include: generating a temporary candidate list by using a spatial neighbor block or temporal neighbor block of a current block; calculating a cost for each candidate in the temporary candidate list by using a template of the current block; generating a final candidate list by rearranging candidates of the temporary candidate list based on the calculated cost; decoding a merge index indicating a specific candidate in the final candidate list; and generating a prediction block of the current block by using motion information of a candidate indicated by the merge index.

公开(公告)号：US20190356915A1

公开(公告)日：2019-11-21

申请号：US16475825

申请日：2017-12-27

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Seunghwan KIM ,  Junghak NAM ,  Jaehyun LIM

IPC: H04N19/12 ,  H04N19/91 ,  H04N19/176 ,  H04N19/14 ,  H04N19/124

Abstract: Disclosed are a method and an apparatus for encoding/decoding a video signal. Specifically, a method for decoding a video signal may include: generating a quantized transform block by performing entropy decoding for the video signal; generating a dequantized transform block by performing dequantization for the quantized transform block; determining whether to apply secondary inverse transform based on information related to a non-zero coefficient in the dequantized transform block; and performing the secondary inverse transform for the dequantized transform block by using a secondary inverse transform kernel applied to the dequantized transform block.

公开(公告)号：US20190335203A1

公开(公告)日：2019-10-31

申请号：US16475978

申请日：2017-09-29

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/597 ,  H04N19/593 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70 ,  H04N19/11

Abstract: An intra-prediction method executed by a decoding device, according to the present invention, comprises the steps of: receiving 360-degree video information; on the basis of the 360-degree video information, deriving a prediction mode of a target block in a target face of a projected picture; deriving reference samples for the target block in a reference face of the projected picture; and deriving prediction samples of the target block on the basis of the reference samples in the reference face.

公开(公告)号：US20250168404A1

公开(公告)日：2025-05-22

申请号：US19028594

申请日：2025-01-17

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Seunghwan KIM ,  Mehdi SALEHIFAR ,  Jaehyun LIM

IPC: H04N19/60 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70 ,  H04N19/96

Abstract: An image decoding method according to the present document comprises a step of deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) regarding transform coefficients regarding a target block. The inverse RST is performed on the basis of transform sets determined on the basis of a mapping relation following an intra prediction mode applied to the target block, and a transform kernel matrix selected from two transform kernel matrices included in the transform sets, respectively, and and is performed on the basis of whether or not the inverse RST is applied, and a transform index indicating one of the transform kernel matrices included in the transform sets. A syntax element bin string regarding the transform index is decoded on the basis of a different context set according to the tree type regarding the division structure of the target block.

公开(公告)号：US20250126240A1

公开(公告)日：2025-04-17

申请号：US18727021

申请日：2023-01-06

Applicant: LG Electronics Inc.

Inventor： Seunghwan KIM ,  Seethal PALURI ,  Jie ZHAO

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/577

Abstract: According to a present disclosure, an image decoding method performed by a decoding apparatus, the image decoding method comprising obtaining image information including inter prediction-related information of a current block from a bitstream; configuring at least one of a merge list of the current block and an advanced motion vector prediction (AMVP) list of the current block for inter prediction; deriving motion information of the current block on the basis of the at least one of the merge list of the current block and the AMVP list of the current block; generating prediction samples for the current block based on the motion information of the current block; and generating reconstruction samples for the current block based on the prediction samples for the current block, wherein the merge list includes at least one of a primary merge list and a secondary merge list (SML).

公开(公告)号：US20250113022A1

公开(公告)日：2025-04-03

申请号：US18977335

申请日：2024-12-11

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46

Abstract: According to embodiments described herein, sub-pictures and/or virtual boundaries can be used for coding an image. For example, sub-pictures in the current picture can be used for predicting, reconstructing, and/or filtering the current picture. Virtual boundaries can be used for filtering reconstructed samples of the current picture. Through image coding based on the subpictures and/or virtual boundaries according to embodiments described herein, the subjective/objective quality of an image can be improved, and the consumption of hardware resources necessary for the coding can be reduced.

公开(公告)号：US20250113021A1

公开(公告)日：2025-04-03

申请号：US18940151

申请日：2024-11-07

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jaehyun LIM ,  Jin HEO ,  Jangwon CHOI ,  Seunghwan KIM

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

Abstract: A method for decoding an image performed by a decoding apparatus according to the present disclosure comprises the steps of: receiving intra prediction information including at least one of MPM flag information indicating whether to derive an intra prediction mode for a current block on the basis of MPM candidates for the current block, or PLANAR flag information indicating whether to determine the intra prediction mode for the current block as a PLANAR mode; deriving the intra prediction mode for the current block on the basis of the MPM flag information and the PLANAR flag information; deriving a predicted block for the current block on the basis of the intra prediction mode for the current block; and generating a reconstructed picture on the basis of the predicted block.