公开(公告)号：US20230062754A1

公开(公告)日：2023-03-02

申请号：US17954151

申请日：2022-09-27

Applicant: LG ELECTRONICS INC

Inventor： Seethal PALURI ,  Hendry HENDRY ,  Seung Hwan KIM

IPC: H04N19/136 ,  H04N19/187 ,  H04N19/70

Abstract: An image encoding/decoding method and apparatus for signaling PTL related information through a VPS and a recording medium storing a bitstream are provided. An image decoding method may comprise obtaining first information indicating the number of profile_tier_level (PTL) syntax structures in a video parameter set (VPS), obtaining PTL syntax structures in the VPS based on the first information, determining whether a total number of output layer sets (OLSs) specified by the VPS is equal to the number of PTL syntax structures in the VPS, and deriving mapping information between the OLSs and the PTL syntax structures respectively applied to the OLSs based on the determination.

公开(公告)号：US20220312014A1

公开(公告)日：2022-09-29

申请号：US17731077

申请日：2022-04-27

Applicant: LG ELECTRONICS, INC.

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

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

Abstract: Provided are an image encoding/decoding method and apparatus. The image decoding method performed by the image decoding apparatus according to the present disclosure comprises: a step for determining whether color space transformation can be applied to a residual sample of a current block; a step for determining a quantization parameter of the current block based on whether the color space transformation can be applied; and a step for determining a transformation coefficient of the current block based on the quantization parameter.

公开(公告)号：US20220256162A1

公开(公告)日：2022-08-11

申请号：US17683203

申请日：2022-02-28

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/137 ,  H04N19/105 ,  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 prediction refinement with optical flow (PROF) applies to the current block, deriving, based on that the PROF applies to the current block, a difference motion vector for each sample position in the current block, deriving a gradient for each sample position in the current block, deriving a PROF offset based on the difference motion vector and the gradient, and deriving a refined prediction sample for the current block based on the PROF offset.

公开(公告)号：US20220191512A1

公开(公告)日：2022-06-16

申请号：US17547753

申请日：2021-12-10

Applicant: LG Electronics Inc.

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/119 ,  H04N19/593 ,  H04N19/105 ,  H04N19/186

Abstract: An image encoding/decoding method and method are provided. An image decoding method performed by an image decoding apparatus includes obtaining partitioning information of an image from a bitstream, determining a current block by partitioning the image based on the partitioning information, identifying a neighboring block located around the current block, identifying whether a prediction mode of the neighboring block is an MIP (matrix based intra prediction) mode, generating a candidate mode list of the current block based on a predetermined candidate mode, based on the prediction mode of the neighboring block being an MIP mode, and determining a prediction mode of the current block based on the candidate mode list.

公开(公告)号：US20250168411A1

公开(公告)日：2025-05-22

申请号：US19030043

申请日：2025-01-17

Applicant: LG ELECTRONICS INC.

Inventor： Hendry TAN ,  Jung Hak NAM ,  Jaehyun LIM ,  Hyeong Moon JANG ,  Seung Hwan KIM

IPC: H04N19/80 ,  H04N19/172 ,  H04N19/70

Abstract: An image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium for storing a bitstream are provided. The image decoding method according to the present disclosure is an image decoding method performed by an image decoding device, and may be an image decoding method comprising the steps of: obtaining size information from a neural-network post-filter characteristics (NNPFC) supplemental enhancement information (SEI) message; and determining the size of an output picture on the basis of the size information, wherein the size information comprises information on the numerator value of the ratio between the size of the output picture and the size of an input picture and information on the denominator value of the ratio.

公开(公告)号：US20250159145A1

公开(公告)日：2025-05-15

申请号：US19022620

申请日：2025-01-15

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

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：US20250106439A1

公开(公告)日：2025-03-27

申请号：US18976949

申请日：2024-12-11

Applicant: LG Electronics Inc.

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

IPC: H04N19/70 ,  H04N19/30 ,  H04N19/503

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 comprises determining whether a video parameter set (VPS) referenced by a sequence parameter set (SPS) is present, deriving information on inter layer prediction, based on the determination as to whether the video parameter set referenced by the sequence parameter set is present, and reconstructing an image based on the information on inter layer prediction.

公开(公告)号：US20250088629A1

公开(公告)日：2025-03-13

申请号：US18830391

申请日：2024-09-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining a splitting type of a current block, splitting the current block into a plurality of lower-layer blocks based on the splitting type, and decoding the lower-layer blocks. In this case, the current block may be a chroma block, and the determining the splitting type of the current block may be performed by disallowing a predetermined splitting type having a width or height of the lower-layer blocks being a predetermined value, among a plurality of splitting types.

公开(公告)号：US20250080762A1

公开(公告)日：2025-03-06

申请号：US18883138

申请日：2024-09-12

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Hendry HENDRY ,  Seung Hwan KIM

IPC: H04N19/423 ,  H04N19/70

Abstract: Disclosed herein are an image encoding and decoding method and apparatus for signaling information on the number of DPB parameters, and a recording medium storing a bitstream. An image decoding method may comprise obtaining first information indicating the number of decoded picture buffer (DPB) parameter syntax structures in a video parameter set (VPS), computing the number of DPB parameter syntax structures in the VPS based on the first information, obtaining the DPB parameter syntax structures in the VPS based on the number of DPB parameter syntax structures, and managing a DPB based on the DPB parameter syntax structures.

公开(公告)号：US20250039411A1

公开(公告)日：2025-01-30

申请号：US18778079

申请日：2024-07-19

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seung Hwan KIM ,  Mehdi SALEHIFAR

IPC: H04N19/186 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/463

Abstract: Provided are an image encoding/decoding method and device. The image decoding method performed by the image decoding device, according to the present disclosure, may comprise the steps of: determining a residual sample of a current block; and resetting the value of the residual sample on the basis of whether a color space transform is applied. The step for resetting the value of the residual block may be performed on the basis of a half value of a chroma residual sample value.