公开(公告)号：US20240187601A1

公开(公告)日：2024-06-06

申请号：US18438023

申请日：2024-02-09

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/60

CPC classification number: H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/60

Abstract: An image decoding method according to the present document comprises a step for deriving a residual sample, wherein the step for deriving the residual sample comprises the steps of: deriving a zero out block for a current block; deriving a context model for last significant coefficient location information on the basis of the width or height of the current block; deriving a value of a last significant coefficient location on the basis of the context model; and deriving the last significant coefficient location on the basis of a value of the last significant coefficient location information and the width or height of the zero out block.

公开(公告)号：US20240171771A1

公开(公告)日：2024-05-23

申请号：US18387809

申请日：2023-11-07

Applicant: LG ELECTRONICS INC.

Inventor： Jane ZHAO ,  Seunghwan KIM

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/56 ,  H04N19/176 ,  H04N19/513

Abstract: The disclosure discloses a method for processing video signals and an apparatus therefor. Specifically, the method of processing video signals based on inter prediction, comprising: configuring a merge candidate list based on a spatial neighboring block and a temporal neighboring block to a current block; adding a history-based merge candidate of the current block to the merge candidate list; obtaining a merge index indicating a merge candidate used for an inter prediction of the current block within the merge candidate list; generating a prediction sample of the current block based on motion information of the merge candidate indicated by the merge index; and updating a history-based merge candidate list based on the motion information.

公开(公告)号：US20240163460A1

公开(公告)日：2024-05-16

申请号：US18413610

申请日：2024-01-16

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/186 ,  H04N19/132 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96

CPC classification number: H04N19/186 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/1887 ,  H04N19/70 ,  H04N19/96 ,  H04N19/117

Abstract: According to the disclosure of the present document, the granularity of value(s) of a chroma residual scaling factor can be controlled through explicit signaling of information on the value(s) of the chroma residual scaling factor. In addition, chroma residual scaling can be efficiently performed through implicit derivation of the information on the value(s) of the chroma residual scaling factor.

公开(公告)号：US20240163435A1

公开(公告)日：2024-05-16

申请号：US17773295

申请日：2020-11-02

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/122 ,  H04N19/159 ,  H04N19/18 ,  H04N19/61

CPC classification number: H04N19/122 ,  H04N19/159 ,  H04N19/18 ,  H04N19/61

Abstract: An image decoding method according to the present disclosure comprises the steps of: deriving residual samples with respect to a target block on the basis of an inverse primary transform with respect to modified transform coefficients; and on the basis of the residual samples, generating a reconstructed picture, wherein a step of deriving the modified transform coefficients may include the steps of: parsing an LFNST index on the basis of the tree-type of a current block not being a dual-tree chroma and a MIP mode not being applicable to the current block; and deriving the modified transform coefficients on the basis of the LFNST index and an LFNST matrix.

公开(公告)号：US20240129467A1

公开(公告)日：2024-04-18

申请号：US18543091

申请日：2023-12-18

Applicant: LG Electronics Inc.

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

IPC: H04N19/122 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

CPC classification number: H04N19/122 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

Abstract: The present disclosure provides a method for reconstructing a video signal, which includes: obtaining a transform coefficient block by performing an entropy decoding and a dequantization for a current block; deriving a secondary transform corresponding to a specific area in the transform coefficient block, wherein the specific area represents an area including a top-left block of the transform coefficient block; performing an inverse secondary transform for each of subblocks within the specific area using the secondary transform; performing an inverse primary transform for a block which the inverse secondary transform is applied to; and reconstructing the current block using a block which the primary inverse transform is applied to.

公开(公告)号：US20240129457A1

公开(公告)日：2024-04-18

申请号：US18538463

申请日：2023-12-13

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Seunghwan KIM ,  Ling LI

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

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: An image decoding method according to the present disclosure comprises deriving a first candidate intra prediction mode based on a first neighboring block of a current block; deriving a second candidate intra prediction mode based on a second neighboring block of the current block; constructing MPM (Most Probable Mode) list of the current block based on the first candidate intra prediction mode and the second candidate intra prediction mode; deriving an intra prediction mode for the current block based on the MPM list; and generating a prediction sample for the current block based on the intra prediction mode, wherein the first neighboring block is a left neighboring block located at the lowermost side among neighboring blocks adjacent to a left boundary of the current block, and wherein the second neighboring block is an upper neighboring block located at the rightmost side among neighboring blocks adjacent to an upper boundary of the current block.

公开(公告)号：US20240121412A1

公开(公告)日：2024-04-11

申请号：US18530716

申请日：2023-12-06

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/186 ,  H04N19/109 ,  H04N19/132 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/109 ,  H04N19/132 ,  H04N19/70

Abstract: According to the disclosure of the present document, a luma mapping with chroma scaling (LMCS) process may be simplified, and a linear LMCS may be applied. Accordingly, the complexity of the LMCS may be reduced and video/image coding efficiency may be increased.

公开(公告)号：US20240098305A1

公开(公告)日：2024-03-21

申请号：US18388108

申请日：2023-11-08

Applicant: LG Electronics Inc.

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

IPC: H04N19/61 ,  H04N19/11 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

CPC classification number: H04N19/61 ,  H04N19/11 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: An image decoding method according to the present specification comprises the steps of: deriving transform coefficients through inverse quantization on the basis of quantized transform coefficient for a target block; deriving modified transform coefficients on the basis of inverse reduced secondary transform (RST) of the transform coefficients; and generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein the step of deriving the modified transform coefficients is characterized in deriving 16 modified transform coefficients by applying a transform kernel matrix to 8 transform coefficients in a 4×4 region of the target block.

公开(公告)号：US20240089506A1

公开(公告)日：2024-03-14

申请号：US18509983

申请日：2023-11-15

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Junghak NAM ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/176 ,  H04N19/503 ,  H04N19/593

CPC classification number: H04N19/70 ,  H04N19/172 ,  H04N19/176 ,  H04N19/503 ,  H04N19/593

Abstract: A video decoding method performed by a video decoding apparatus, according to the present document, comprises the steps of: acquiring general constraint information from a bitstream; parsing, from the bitstream, a flag indicating whether or not the general constraint information includes information about constraints to which output layer sets conform; parsing the information about the constraints in the general constraint information on the basis of the flag; and decoding a current picture on the basis of the information about the constraints, wherein the general constraint information includes number information and alignment information about the constraints, and, within the general constraint information, the alignment information may be present after the number information.

公开(公告)号：US20240073450A1

公开(公告)日：2024-02-29

申请号：US18237306

申请日：2023-08-23

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jin HEO ,  Seunghwan KIM

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119

Abstract: A method, performed by a digital device, for processing an image service according to the present document comprises the steps of: receiving image information; decoding a first image on the basis of the image information; processing the decoded first image to be displayed on a first area of a display screen; and processing a second image to be displayed on a second area of the display screen.