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.

公开(公告)号：US20240406387A1

公开(公告)日：2024-12-05

申请号：US18723772

申请日：2023-01-02

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Hyeong Moon JANG ,  Sunmi YOO ,  Jungah CHOI

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

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 comprise the steps of: deriving multiple direct mode (DM) candidates for a chroma block; determining one DM candidate among the multiple DM candidates on basis of first information; and performing intra prediction of the chroma block on the basis of the determined DM candidate, wherein default modes for the chroma block are modified on the basis of whether same are identical to the multiple DM candidates.

公开(公告)号：US20240323365A1

公开(公告)日：2024-09-26

申请号：US18619945

申请日：2024-03-28

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Jin HEO

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

CPC classification number: H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise identifying a current chroma block by splitting an image, identifying whether a matrix based intra prediction mode applies to a first luma sample position corresponding to the current chroma block, identifying whether a predetermined prediction mode applies to a second luma sample position corresponding to the current chroma block, based on the matrix based intra prediction mode doing not apply, and determining an intra prediction mode candidate of the current chroma block based on an intra prediction mode applying to a third luma sample position corresponding to the current chroma block, based on the predetermined prediction mode doing not apply.

公开(公告)号：US20240267550A1

公开(公告)日：2024-08-08

申请号：US18642182

申请日：2024-04-22

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/46 ,  H04N19/107 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/46 ,  H04N19/107 ,  H04N19/159 ,  H04N19/176

Abstract: An image decoding method is disclosed. The image decoding method includes determining a prediction mode of a current block based on prediction mode information of the current block obtained from a bitstream, obtaining a transform coefficient block of the current block from the bitstream, dequantizing the transform coefficient to generate a dequantized transform coefficient block, determining a transform kernel for the dequantized transform coefficient block, and generating a residual block of the current block by performing inverse transform on the dequantized transform coefficient block using the transform kernel.

公开(公告)号：US20240163430A1

公开(公告)日：2024-05-16

申请号：US18419032

申请日：2024-01-22

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG

IPC: H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/86

CPC classification number: H04N19/117 ,  H04N19/119 ,  H04N19/176 ,  H04N19/86

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise deriving a reconstructed block for a current block, deriving a target boundary for the reconstructed block, determining a filter length of a deblocking filter to be applied for the target boundary, and applying the deblocking filter for the target boundary based on the determined filter length. The filter length may be determined based on at least one of a width or height of a transform block adjacent to the target boundary.

公开(公告)号：US20230412830A1

公开(公告)日：2023-12-21

申请号：US18242408

申请日：2023-09-05

Applicant: LG Electronics Inc.

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

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

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 first flag specifying whether to perform weighted prediction on a current block and a weight index BcwIdx of bi-prediction with CU-level weight (BCW) for the current block, determining whether to perform default weighted prediction or explicit weighted prediction on the current block based on the first flag and BcwIdx, and generating a prediction block for the current block by performing the determined method.

公开(公告)号：US20230291896A1

公开(公告)日：2023-09-14

申请号：US18135329

申请日：2023-04-17

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169

CPC classification number: H04N19/11 ,  H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/1883

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise determining a current block by splitting an image, identifying whether a palette mode is applied for the current block based on a palette mode flag obtained from a bitstream, obtaining palette mode encoding information of the current block from the bitstream based on a tree type of the current block and whether the palette mode is applied for the current block, and obtaining chroma component prediction information of the current block from the bitstream based on the palette mode being not applied for the current block.

公开(公告)号：US20230224483A1

公开(公告)日：2023-07-13

申请号：US18009581

申请日：2021-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Hendry HENDRY ,  JungHak NAM

IPC: H04N19/423 ,  H04N19/105 ,  H04N19/172

CPC classification number: H04N19/423 ,  H04N19/105 ,  H04N19/172

Abstract: An image encoding/decoding method and apparatus for signaling picture output information and a recording medium storing a bitstream are provided. An image decoding method may comprise obtaining picture output information indicating whether a picture included in an output layer in a bitstream is output and performing processing in a DPB of the picture based on the picture output information. The picture output information of a first value may indicate output of the picture and the picture output information of a second value may indicate non-output of the picture. The bitstream may be restricted so that the output layer in the bitstream includes at least one picture whose picture output information is the first value.

公开(公告)号：US20230224470A1

公开(公告)日：2023-07-13

申请号：US18008619

申请日：2021-06-11

Applicant: LG Electronics Inc.

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

IPC: H04N19/136 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172

CPC classification number: H04N19/136 ,  H04N19/159 ,  H04N19/188 ,  H04N19/172

Abstract: An image encoding/decoding method and apparatus is provided. The image decoding method comprises determining whether first information specifying a value of a picture order count (POC) most significant bit (MSB) cycle of a current picture is present in a picture header, determining a POC MSB of the current picture based on whether the first information is present in the picture header, and deriving a POC of the current picture based on the determined POC MSB. Based on the first information being not present in the picture header and the current picture being not a CLVSS (coded layer video sequence start) picture, a POC difference between the current picture and a previous picture preceding the current picture in decoding order may be less than half a maximum value of a POC least significant bit (LSB) of the current picture.

公开(公告)号：US20230080116A1

公开(公告)日：2023-03-16

申请号：US17797953

申请日：2021-02-15

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/119 ,  H04N19/117 ,  H04N19/172 ,  H04N19/46

Abstract: An image coding/decoding method and device are provided. The image decoding method carried out by the image decoding device, according to the present disclosure, may comprise the steps of: determining the number of tiles in a current picture on the basis that the segmentation of the current picture is not restricted; on the basis that the number of tiles in the current picture is a plurality, acquiring from a bitstream, a first flag representing whether tile boundary filtering is available; and, on the basis of the value of the first flag, determining whether to carry out filtering for the boundaries of the tiles belonging to the current picture.