公开(公告)号：US20240244213A1

公开(公告)日：2024-07-18

申请号：US18417903

申请日：2024-01-19

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  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：US20230388512A1

公开(公告)日：2023-11-30

申请号：US18232125

申请日：2023-08-09

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jin HEO ,  Jung Hak NAM ,  Jangwon CHOI

IPC: H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

CPC classification number: H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure comprises determining whether to apply intra prediction to a current chroma block based on information on prediction of the current chroma block, deriving an intra prediction mode of the current chroma block based on an intra prediction mode of a corresponding luma block corresponding to the current chroma block and intra chroma prediction mode information of the current chroma block, when intra prediction applies to the current chroma block, and generating a prediction block of the current chroma block, by performing intra prediction based on the intra prediction mode of the current chroma block. When the intra prediction mode of the corresponding luma block is not present, the intra prediction mode of the current chroma block is derived based on a default intra prediction mode.

公开(公告)号：US20230291915A1

公开(公告)日：2023-09-14

申请号：US18198170

申请日：2023-05-16

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04N19/186 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  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 palette information and palette index prediction information of a current block from a bitstream, based on a palette mode applying for the current block, constructing a palette predictor for the current block based on the palette information and constructing a palette table for the current block based on the palette predictor, generating a palette index map for the current block based on the palette index prediction information, and decoding the current block based on the palette table and the palette index map. The palette predictor may be selectively updated based on a split structure of the current block.

公开(公告)号：US20230089062A1

公开(公告)日：2023-03-23

申请号：US17970124

申请日：2022-10-20

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  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：US20220337814A1

公开(公告)日：2022-10-20

申请号：US17760676

申请日：2020-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Jangwon CHOI ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Moonmo KOO

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/117 ,  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 may comprise determining an intra prediction mode of a current block, determining a reference sample based on the intra prediction mode and a neighboring sample of the current block, generating the prediction block based on the reference sample, and decoding the current block based on the prediction block. The reference sample may be determined by applying at least one of first filtering or second filtering to the neighboring sample value based on the intra prediction mode.

公开(公告)号：US20220272329A1

公开(公告)日：2022-08-25

申请号：US17635185

申请日：2020-08-14

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Jin HEO

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

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：US20220224916A1

公开(公告)日：2022-07-14

申请号：US17591954

申请日：2022-02-03

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

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

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.

公开(公告)号：US20220210449A1

公开(公告)日：2022-06-30

申请号：US17697474

申请日：2022-03-17

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/119 ,  H04N19/159 ,  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 palette information and palette index prediction information of a current block from a bitstream, based on a palette mode applying for the current block, constructing a palette predictor for the current block based on the palette information and constructing a palette table for the current block based on the palette predictor, generating a palette index map for the current block based on the palette index prediction information, and decoding the current block based on the palette table and the palette index map, The palette predictor may be selectively updated based on a split structure of the current block.

公开(公告)号：US20220191535A1

公开(公告)日：2022-06-16

申请号：US17566962

申请日：2021-12-31

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/51 ,  H04N19/176 ,  H04N19/159 ,  H04N19/137 ,  H04N19/105

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 constructed affine merge candidate of a current block, based on an inter prediction mode of the current block being an affine merge mode, constructing an affine merge candidate list including the constructed affine merge candidate, selecting an affine merge candidate of the current block based on the affine merge candidate list, generating a prediction block of the current block based on motion information of the selected affine merge candidate. The deriving the constructed affine merge candidate may comprise deriving a weight index of bi-prediction for the constructed affine merge candidate.

公开(公告)号：US20220182623A1

公开(公告)日：2022-06-09

申请号：US17437349

申请日：2020-03-13

Applicant: LG ELECTRONICS INC.

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

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

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.