公开(公告)号：US20240357132A1

公开(公告)日：2024-10-24

申请号：US18760491

申请日：2024-07-01

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jung Hak NAM

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/119 ,  H04N19/137 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/119 ,  H04N19/137 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure comprises determining whether a prediction mode of a current block is an intra block copy (IBC) mode based on information on the prediction mode of the current block, based on the prediction mode of the current block being an IBC mode, deriving motion information of the current block based on motion information of a corresponding block corresponding to the current block, and generating a prediction block for the current block, by performing IBC prediction based on the derived motion information of the current block. Based on absence of motion information of the corresponding block, the motion information of the current block is derived based on default motion information.

公开(公告)号：US20230179760A1

公开(公告)日：2023-06-08

申请号：US17912692

申请日：2021-03-19

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Jung Hak NAM ,  Sunmi YOO

IPC: H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method comprises obtaining palette prediction information and palette index information of a current block from a bitstream, constructing a palette table for the current block based on the palette prediction information, generating a palette index map for the current block based on the palette index information, and decoding the current block based on the palette table and the palette index map. The palette prediction information may comprise run-value information specifying a first palette entry reused in the palette table among palette entries in the palette predictor for the current block, the run-value information may be obtained from the bitstream only when an index value of the first palette entry is smaller than a first size of the palette predictor, and last run-value information of the palette predictor may have a first value for terminating search of the first palette entry, based on the first palette entry being a last reused palette entry in the palette table.

公开(公告)号：US20230143648A1

公开(公告)日：2023-05-11

申请号：US17916724

申请日：2021-04-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/174

CPC classification number: H04N19/159 ,  H04N19/176 ,  H04N19/174

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method may comprise determining whether an inter slice type is allowed for a current picture including a current block, determining whether an intra slice type is allowed for the current picture, based on the inter slice type being allowed for the current picture, and decoding the current block based on a slice type allowed for the current picture. Whether the inter slice type is allowed for the current picture may be determined based on a picture type of the current picture and whether a current layer including the current picture is able to use inter-layer prediction.

公开(公告)号：US20230049298A1

公开(公告)日：2023-02-16

申请号：US17789939

申请日：2020-12-31

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jung Hak NAM

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/159 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus comprises obtaining a current block corresponding to a leaf node of a split tree structure based on a predetermined prediction mode type, resetting a prediction mode type of the current block, obtaining prediction mode information of the current block based on the reset prediction mode type, and generating a prediction block of the current block based on the prediction mode information. The resetting the prediction mode type of the current block may be performed based on at least one of a slice type or size of the current block.

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：US20250063176A1

公开(公告)日：2025-02-20

申请号：US18937174

申请日：2024-11-05

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Hyeong Moon JANG ,  Jangwon CHOI

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus include features of generating a prediction block by performing intra prediction on a current block, determining whether to apply position dependent intra prediction combination (PDPC) to the prediction block, and generating a final prediction block of the current block, by applying PDPC to the prediction block based on the determination. The determining whether to apply PDPC to the prediction block may include determining whether a size of the current block satisfies a predetermined condition. Based on the size of the current block satisfying the predetermined condition, it may be determined to apply PDPC to the prediction block. Based on the size of the current block not satisfying the predetermined condition, a determination of a color component of the current block may be skipped and it may be determined not to apply PDPC to the prediction block.

公开(公告)号：US20250030851A1

公开(公告)日：2025-01-23

申请号：US18775661

申请日：2024-07-17

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/119 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining whether predetermined splitting is allowed for a current block based on a size of the current block, obtaining information on splitting of the current block based on whether the predetermined splitting is allowed, splitting the current block based on the information on splitting of the current block, and decoding the current block. Whether the predetermined splitting is allowed may be determined based on whether a width or height of the current block is a predetermined sample length.

公开(公告)号：US20240414342A1

公开(公告)日：2024-12-12

申请号：US18703177

申请日：2022-10-28

Applicant: LG Electronics Inc.

Inventor： Chulkeun KIM ,  Hyeong Moon JANG

IPC: H04N19/13 ,  H04N19/91

Abstract: Herein provided are a feature encoding/decoding method, a recording medium storing a bitstream generated by the feature encoding method and a method of transmitting the bitstream. The feature decoding method may comprise obtaining channel information of a current coding unit, determining a context model for the current coding unit based on the channel information; and decoding the current coding unit based on the context model. The channel information may comprise channel grouping information of a feature map including the current coding unit, and the context model is determined based on the channel grouping information.

公开(公告)号：US20240406372A1

公开(公告)日：2024-12-05

申请号：US18700423

申请日：2022-11-01

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Chulkeun KIM

IPC: H04N19/103 ,  H04N19/124 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/184

Abstract: Provided are a feature encoding/decoding method and device, a recording medium in which a bitstream generated by the feature encoding method is stored, and a method for transmitting the bitstream. A feature decoding method according to the present disclosure comprises the steps of: determining an encoding structure of a current channel in a feature map; acquiring, on the basis of the encoding structure, a current block by splitting the current channel; and reconstructing the current block, wherein the encoding structure of the current channel can be determined on the basis of whether an inter-channel reference referring to an encoding structure of a channel, having been reconstructed for the current channel, is applied.

公开(公告)号：US20240314330A1

公开(公告)日：2024-09-19

申请号：US18671368

申请日：2024-05-22

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/159 ,  H04N19/103 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593 ,  H04N19/96

CPC classification number: H04N19/159 ,  H04N19/103 ,  H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise obtaining a current block by splitting an image, determining prediction mode characteristic information based on encoding information of the current block, determining a prediction mode type of a lower-layer block split from the current block based on the prediction mode characteristic information, obtaining the lower-layer block by splitting the current block, and decoding the lower-layer block based on the determined prediction mode type of the lower-layer block. The prediction mode characteristic information may be determined based on a color format of the current block.