公开(公告)号：US20220353507A1

公开(公告)日：2022-11-03

申请号：US17848634

申请日：2022-06-24

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Hyeong Moon JANG ,  Jangwon CHOI

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

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：US20220337843A1

公开(公告)日：2022-10-20

申请号：US17763054

申请日：2020-09-23

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Seethal PALURI

IPC: H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/174

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include: obtaining palette information and palette index prediction information of a current block from a bitstream; 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, wherein the palette predictor may be initialized using a user defined palette entry obtained from at least one of an adaptation parameter set (APS), a picture parameter set (PPS) or a slice header.

公开(公告)号：US20220337842A1

公开(公告)日：2022-10-20

申请号：US17639837

申请日：2020-09-09

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  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 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 bi-directional optical flow (BDOF) applies to the current block, based on that the BDOF applies to the current block, deriving a gradient for a current subblock in the current block, deriving motion refinement (vx, vy) for the current subblock based on the gradient, deriving a BDOF offset based on the gradient and the motion refinement, and deriving a refined prediction sample for the current block based on the prediction sample of the current block and the BDOF offset.

公开(公告)号：US20220279172A1

公开(公告)日：2022-09-01

申请号：US17703749

申请日：2022-03-24

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG

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

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：US20220279163A1

公开(公告)日：2022-09-01

申请号：US17636911

申请日：2020-08-20

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/14 ,  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 deriving a prediction mode of a current block, constructing a merge candidate list for the current block, based on the prediction mode of the current block being a triangle partition mode (TPM), deriving motion information of two partitions of the current block based on the merge candidate list and two merge indices of the current block signaled through a bitstream, generating a prediction block of the current block based on the motion information, storing motion information of the current block, and updating a history-based motion vector predictor (HMVP) buffer based on the motion information of the current block.

公开(公告)号：US20220272333A1

公开(公告)日：2022-08-25

申请号：US17629146

申请日：2020-07-21

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise generating a reconstructed block for a current block, determining a target boundary for the reconstructed block, determining a first target block and a second target block based on a sample adjacent to the target boundary, and performing deblocking filtering on the sample adjacent to the target boundary, based on a prediction mode of at least one of the first target block or the second target block. In this case, a value of the sample adjacent to the target boundary may not be changed based on the prediction mode of at least one of the first target block or the second target block being a palette mode.

公开(公告)号：US20220132137A1

公开(公告)日：2022-04-28

申请号：US17441625

申请日：2020-03-24

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method includes deriving a first motion vector predictor for a first prediction direction of a current block and a second motion vector predictor for a second prediction direction, deriving a first motion vector difference for the first prediction direction of the current block and a second motion vector difference for the second prediction direction using information on a motion vector difference, and deriving a motion vector for the first prediction direction of the current block using the first motion vector predictor and the first motion vector difference and deriving a motion vector for the second prediction direction of the current block using the second motion vector predictor and the second motion vector difference. Based on first information specifying whether to parse information on the second motion vector difference, whether second information specifying a method of deriving the second motion vector difference may be determined.

公开(公告)号：US20250080754A1

公开(公告)日：2025-03-06

申请号：US18293202

申请日：2022-08-18

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jaehyun LIM ,  Nae Ri PARK ,  Sunmi YOO ,  Jung Hak NAM ,  Hyeong Moon JANG

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176

Abstract: Provided are an image encoding/decoding method and apparatus. An image decoding method performed by an image decoding apparatus may comprise determining an intra prediction mode of a current block, performing planar intra prediction based on the intra prediction mode being a planar prediction mode and obtaining a reconstructed sample of the current block based on a prediction sample obtained based on the planar intra prediction. The performing the planar intra prediction may comprise applying filtering to an intra prediction reference sample of the current block.

公开(公告)号：US20250071284A1

公开(公告)日：2025-02-27

申请号：US18825978

申请日：2024-09-05

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Seethal PALURI

IPC: H04N19/132 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include: obtaining palette information and palette index prediction information of a current block from a bitstream; 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, wherein the palette predictor may be initialized using a user defined palette entry obtained from at least one of an adaptation parameter set (APS), a picture parameter set (PPS) or a slice header.

公开(公告)号：US20240373000A1

公开(公告)日：2024-11-07

申请号：US18758679

申请日：2024-06-28

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise generating a reconstructed block for a current block, determining a target boundary for the reconstructed block, determining a first target block and a second target block based on a sample adjacent to the target boundary, and performing deblocking filtering on the sample adjacent to the target boundary, based on a prediction mode of at least one of the first target block or the second target block. In this case, a value of the sample adjacent to the target boundary may not be changed based on the prediction mode of at least one of the first target block or the second target block being a palette mode.