公开(公告)号：US20250150639A1

公开(公告)日：2025-05-08

申请号：US18838153

申请日：2023-04-12

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jung Hak NAM

IPC: H04N19/89 ,  H04N19/105 ,  H04N19/176 ,  H04N19/88

Abstract: An image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium storing the bitstream therein are provided. The image decoding method according to the present disclosure, which is an image decoding method performed by an image decoding device, may comprise the steps of: constructing a prediction candidate list for a current block; deriving an error value for the current block on the basis of whether a reference picture referred to by a prediction candidate in the prediction candidate list is a resampled reference picture; and reordering an order of the prediction candidates in the prediction candidate list on the basis of the error value, wherein the error value is derived to a predetermined value on the basis of the reference picture being a resampled reference picture.

公开(公告)号：US20240373034A1

公开(公告)日：2024-11-07

申请号：US18689337

申请日：2022-09-21

Applicant: LG Electronics Inc.

Inventor： Jung Hak NAM ,  Sunmi YOO ,  Jaehyun LIM ,  Seung Hwan KIM

IPC: H04N19/147 ,  H04N19/103 ,  H04N19/124 ,  H04N19/132 ,  H04N19/14 ,  H04N19/184

Abstract: An image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium for storing a bitstream are provided. An image encoding method according to the present disclosure is an image encoding method performed by an image encoding device, and may be an image encoding method comprising the steps of: obtaining information on the similarity between a current image and a reference image and information on the complexity of the current image; predicting bitrate information and distortion information of one or more candidate resolutions on the basis of the information on the similarity and the information on the complexity; and selecting a resolution to be applied to the current image among the candidate resolutions on the basis of the bitrate information and the distortion information.

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：US20240283929A1

公开(公告)日：2024-08-22

申请号：US18654364

申请日：2024-05-03

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jung Hak NAM ,  Jaehyun LIM ,  Jin HEO ,  Seung Hwan KIM

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/423 ,  H04N19/70 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/186 ,  H04N19/423 ,  H04N19/70 ,  H04N19/82

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining a chroma array type of a current image, determining an adaptive loop filter (ALF) indicator of a chroma component based on the chroma array type, and performing ALF filtering with respect to a reconstructed image based on a value of the ALF indicator. The value of the ALF indicator may be determined to be a predetermined value without being obtained from a bitstream, based on the chroma array type being a predetermined type, and the value of the ALF indicator may be obtained from the bitstream, based on the chroma array type being not the predetermined type.

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：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：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：US20250071258A1

公开(公告)日：2025-02-27

申请号：US18723700

申请日：2023-04-12

Applicant: LG Electronics Inc.

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

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

Abstract: An image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium storing a bitstream are provided. The image decoding method performed by an image decoding apparatus, according to the present disclosure, comprises the steps of: on the basis of whether or not reordering of prediction candidates in a merge mode with motion vector difference (MMVD) mode is activated, determining whether or not to reorder the prediction candidates; identifying a prediction candidate indicated by prediction candidate identification information from the prediction candidates or the reordered prediction candidates; and deriving an offset of the MMVD mode on the basis of the identified prediction candidate, wherein the prediction candidate identification information is acquired from a bitstream.