公开(公告)号：US20230188714A1

公开(公告)日：2023-06-15

申请号：US17925782

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: H04N19/117 ,  H04N19/186 ,  H04N19/82

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

Abstract: An image encoding/decoding method and apparatus for signaling an identifier for an APS and a method of transmitting a bitstream are provided. The image decoding method according to the present disclosure may comprise obtaining adaptive parameter set (APS) parameter type information specifying an APS parameter type signaled by an APS, obtaining APS identifier information specifying the APS after obtaining the APS parameter type information, and reconstructing an image based on the APS identifier information.

公开(公告)号：US20230082353A1

公开(公告)日：2023-03-16

申请号：US17987274

申请日：2022-11-15

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining whether to parse first information specifying whether a skip mode applies to a current block, determining whether to parse second information specifying whether an IBC (Intra Block Copy) mode applies to the current block, determining whether the IBC mode applies to the current block based on the first information and the second information, and deriving a prediction block of the current block based on whether to apply the IBC mode. Whether to parse the first information may be determined based on at least one of a width or height of the current block.

公开(公告)号：US20230047175A1

公开(公告)日：2023-02-16

申请号：US17968311

申请日：2022-10-18

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/109 ,  H04N19/186 ,  H04N19/70 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise determining prediction mode characteristic information based on a color format of a 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 based on the prediction mode type of the lower-layer block, and decoding the lower-layer block based on the prediction mode type of the lower-layer block. The prediction mode type of the lower-layer block comprises a first prediction mode type specifying that both an intra prediction mode and an inter prediction mode are available, a second prediction mode type specifying that only the intra prediction mode is available and a third prediction mode type specifying that only the inter prediction mode is available. Based on a first condition for the current block being satisfied, the prediction mode characteristic information has a first value, and the first condition comprises a case where a color format of the current block is a monochrome format or a 4:4:4 format. Based on the first condition for the current block being not satisfied, the prediction mode characteristic information has a second value or a third value based on at least one of a color format, split mode or size of the current block.

公开(公告)号：US20220286689A1

公开(公告)日：2022-09-08

申请号：US17630028

申请日：2020-08-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/137 ,  H04N19/105 ,  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 comprises determining an inter prediction technique applying to a current block based on a prediction mode of the current block being an inter prediction mode, deriving a motion information candidate of the current block based on a type of the determined inter prediction technique, deriving motion information of the current block based on motion information of the derived motion information candidate, and generating a prediction block for the current block by performing inter prediction on the current block based on the motion information of the current block. The motion information candidate may comprise an interpolation filter index.

公开(公告)号：US20220279200A1

公开(公告)日：2022-09-01

申请号：US17703696

申请日：2022-03-24

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Jungah CHOI

IPC: H04N19/46 ,  H04N19/124 ,  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 determining a residual coding method of a current transform block corresponding to a current coding block, reconstructing residual information of the transform block based on the determined residual coding method and reconstructing the current transform block based on the residual information.

公开(公告)号：US20220279165A1

公开(公告)日：2022-09-01

申请号：US17703291

申请日：2022-03-24

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

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 bi-directional optical flow (BDOF) or prediction refinement with optical flow (PROF) applies to a current block, based on BDOF or PROF applying to the current block, fetching a prediction sample of the current block from a reference picture of the current block based on motion information of the current block, and deriving a refined prediction sample for the current block, by applying BDOF or PROF to the current block based on the fetched prediction sample.

公开(公告)号：US20220272346A1

公开(公告)日：2022-08-25

申请号：US17696619

申请日：2022-03-16

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/137 ,  H04N19/105 ,  H04N19/513

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 deriving a prediction sample of a current block based on motion information of the current block, deriving a reference picture resampling (RPR) condition for the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block based on the RPR condition, and deriving a refined prediction sample for the current block by applying PROF to the current block.

公开(公告)号：US20220182606A1

公开(公告)日：2022-06-09

申请号：US17564640

申请日：2021-12-29

Applicant: LG Electronics Inc.

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

IPC: H04N19/105 ,  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 may comprise constructing an affine merge candidate list for a current block, based on an inter prediction mode of the current block being an affine merge mode, selecting one affine merge candidate from the affine merge candidate list, deriving motion information of the current block based on motion information of the selected affine merge candidate, generating a prediction block of the current block based on the motion information of the current block, and reconstructing the current block based on the prediction block of the current block. The constructing the affine merge candidate list may comprise deriving a constructed affine merge candidate, and the deriving the constructed affine merge candidate may comprise deriving a weight index for bi-prediction of the constructed affine merge candidate.

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.