公开(公告)号：US20250150608A1

公开(公告)日：2025-05-08

申请号：US18952620

申请日：2024-11-19

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seung Hwan KIM

IPC: H04N19/187 ,  H04N19/169

Abstract: An image encoding/decoding method and apparatus is provided. The image decoding method comprises determining at least one layer in an output layer set (OLS), and determining a number of sublayers for the at least one layer.

公开(公告)号：US20240422323A1

公开(公告)日：2024-12-19

申请号：US18821525

申请日：2024-08-30

Applicant: LG Electronics Inc.

Inventor： Nae Ri PARK ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Seung Hwan KIM

IPC: H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise deriving a prediction sample of a current block based on motion information of the current block, determining whether bi-directional optical flow (BDOF) applies to the current block, based on that the BDOF applies to the current block, deriving a gradient for a current subblock in the current block, deriving motion refinement (vx, vy) for the current subblock based on the gradient, deriving a BDOF offset based on the gradient and the motion refinement, and deriving a refined prediction sample for the current block based on the prediction sample of the current block and the BDOF offset.

公开(公告)号：US20240380884A1

公开(公告)日：2024-11-14

申请号：US18285957

申请日：2022-04-08

Applicant: LG Electronics Inc.

Inventor： Nae Ri PARK ,  Jaehyun LIM ,  Sunmi YOO ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Jangwon CHOI ,  Seung Hwan KIM

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method is performed by the image decoding apparatus and comprises generating a first prediction sample for a current block based on a first intra prediction mode, generating a second prediction sample for the current block based on a second intra prediction mode, and generating a prediction block for the current block based on the first prediction sample and the second prediction sample. The prediction block may be generated by respectively applying a first weight and a second weight to the first prediction sample and the second prediction sample.

公开(公告)号：US20240129460A1

公开(公告)日：2024-04-18

申请号：US18525025

申请日：2023-11-30

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Jungah CHOI ,  Seung Hwan KIM

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include identifying a prediction mode of a current block, determining a candidate intra prediction mode for the current block, based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block being an intra prediction mode, generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode, and determine an intra prediction mode of the current block based on the candidate intra prediction mode list. In this case, the candidate intra prediction mode may be determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode.

公开(公告)号：US20240031575A1

公开(公告)日：2024-01-25

申请号：US18222230

申请日：2023-07-14

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seung Hwan KIM ,  Seethal PALURI

IPC: H04N19/136 ,  H04N19/172 ,  H04N19/174

CPC classification number: H04N19/136 ,  H04N19/172 ,  H04N19/174

Abstract: Disclosed herein are an image encoding/decoding method and apparatus. An image decoding method performed by an image encoding apparatus may include acquiring size information indicating a size of a current slice corresponding to at least a portion of a current picture from a bitstream and determining the size of the current slice based on the size information.

公开(公告)号：US20240015294A1

公开(公告)日：2024-01-11

申请号：US18131763

申请日：2023-04-06

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seung Hwan KIM ,  Hendry HENDRY ,  Seethal PALURI

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/70

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method performed by the image decoding apparatus, according to the present disclosure, comprises the steps of: determining a current block by splitting an image on the basis of split information acquired from a bitstream; determining a quantization parameter of the current block; and determining a transform coefficient of the current block on the basis of the quantization parameter.

公开(公告)号：US20230319302A1

公开(公告)日：2023-10-05

申请号：US17915928

申请日：2021-03-31

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seung Hwan KIM

IPC: H04N19/503 ,  H04N19/105 ,  H04N19/184 ,  H04N19/31

CPC classification number: H04N19/503 ,  H04N19/105 ,  H04N19/184 ,  H04N19/31

Abstract: An image encoding/decoding method and apparatus is provided. The image decoding method performed by the image decoding apparatus may comprise determining inter-layer direct reference and determining the number of sublayers of a current layer based on the inter-layer direct reference.

公开(公告)号：US20230308674A1

公开(公告)日：2023-09-28

申请号：US18021599

申请日：2021-08-19

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Hyeong Moon JANG ,  Jaehyun LIM ,  Seung Hwan KIM

IPC: H04N19/46 ,  H04N19/172

CPC classification number: H04N19/46 ,  H04N19/172

Abstract: An image encoding/decoding method and apparatus are provided. The image encoding method comprises deriving information for a composite picture generated from one or more source pictures and generating a bitstream by encoding a single composite picture information (CPI) supplemental enhancement information (SEI) message including the information for the composite picture. The composite picture may comprise one or more patches obtained from the source pictures, the information for the composite picture may comprise first information for a source area corresponding to each of the patches in the source pictures and second information for a patch area covered by each of the patches in the composite picture, and each layer including the source pictures may be an output layer.

公开(公告)号：US20230300350A1

公开(公告)日：2023-09-21

申请号：US18009248

申请日：2021-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seung Hwan KIM ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Seethal PALURI

IPC: H04N19/184 ,  H04N19/189 ,  H04N19/105 ,  H04N19/159 ,  H04N19/30

CPC classification number: H04N19/184 ,  H04N19/189 ,  H04N19/105 ,  H04N19/159 ,  H04N19/30

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method performed by the image decoding apparatus according to the present disclosure may include: obtaining, from a bitstream, maximum temporal identifier information indicating a maximum temporal identifier of a reference layer which is referred to for inter-layer prediction of a current layer; and performing, based on the maximum temporal identifier information, a sub-bitstream extraction process from the bitstream, wherein, in the sub-bitstream extraction process, among parameter sets of the reference layer, a parameter set not referred to for the inter-layer prediction of the current layer may be removed from the bitstream.

公开(公告)号：US20230199191A1

公开(公告)日：2023-06-22

申请号：US17916452

申请日：2021-03-26

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seung Hwan KIM ,  Seethal PALURI ,  Jie ZHAO

IPC: H04N19/136 ,  H04N19/70 ,  H04N19/186 ,  H04N19/103

CPC classification number: H04N19/136 ,  H04N19/70 ,  H04N19/186 ,  H04N19/103 ,  H04N19/82

Abstract: An image encoding/decoding method and apparatus for signaling a high level syntax (HLS) and a method of transmitting a bitstream are provided. An image decoding method according to the present disclosure may include obtaining first information indicating whether to constrain luma mapping with chroma scaling (LMCS), obtaining second information indicating whether LMCS for a current video sequence is allowed, and reconstructing a current picture within the current video sequence based on the second information. A value of the second information may be determined based on a value of the first information.