公开(公告)号：US20220264118A1

公开(公告)日：2022-08-18

申请号：US17629981

申请日：2020-08-26

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jin HEO ,  Sunmi YOO ,  Jaehyun LIM ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/176 ,  H04N19/132 ,  H04N19/70 ,  H04N19/12

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining, through a bitstream, image information including a motion information candidate index and residual information; deriving motion information of a current block on the basis of the motion information candidate index; deriving a prediction sample on the basis of the motion information; deriving, on the basis of residual syntax elements for a current residual coefficient in the current block, the current residual coefficient; deriving a residual sample on the basis of the current residual coefficient; and deriving a reconstruction sample of the current block on the basis of the prediction sample and the residual sample.

公开(公告)号：US20220264099A1

公开(公告)日：2022-08-18

申请号：US17629958

申请日：2020-08-26

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jin HEO ,  Sunmi YOO ,  Jaehyun LIM ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/12 ,  H04N19/70

Abstract: A method for decoding a video performed by a decoding device according to the present document is characterized by comprising: a step for acquiring video information including prediction mode information and residual information through a bitstream; a step for deriving a prediction mode of a current block on the basis of the prediction mode information; a step for deriving a prediction sample on the basis of the prediction mode; a step for deriving a current residual coefficient on the basis of residual syntax elements for the current residual coefficient in the current block; a step for deriving a residual sample on the basis of the current residual coefficient; and a step for deriving a reconstructed sample of the current block on the basis of the prediction sample and the residual sample.

公开(公告)号：US20220256160A1

公开(公告)日：2022-08-11

申请号：US17610943

申请日：2020-06-17

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to this document comprises the steps of: determining whether the width and the height of a current block are smaller than or equal to the size of a maximum transform block; when the width and the height are smaller than or equal to the size of the maximum transform block, obtaining a BDPCM flag representing whether or not to apply BDPCM for the current block; deriving prediction samples for first and second samples of the current block on the basis of the BDPCM flag; deriving residual samples on the basis of received residual information; and deriving reconstructed samples for the first and second samples on the basis of the prediction samples and the residual samples.

公开(公告)号：US20220191512A1

公开(公告)日：2022-06-16

申请号：US17547753

申请日：2021-12-10

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Jungah CHOI ,  Seung Hwan KIM

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/119 ,  H04N19/593 ,  H04N19/105 ,  H04N19/186

Abstract: An image encoding/decoding method and method are provided. An image decoding method performed by an image decoding apparatus includes obtaining partitioning information of an image from a bitstream, determining a current block by partitioning the image based on the partitioning information, identifying a neighboring block located around the current block, identifying whether a prediction mode of the neighboring block is an MIP (matrix based intra prediction) mode, generating a candidate mode list of the current block based on a predetermined candidate mode, based on the prediction mode of the neighboring block being an MIP mode, and determining a prediction mode of the current block based on the candidate mode list.

公开(公告)号：US20220182668A1

公开(公告)日：2022-06-09

申请号：US17677598

申请日：2022-02-22

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Seunghwan KIM ,  Jin HEO ,  Jungah CHOI ,  Sunmi YOO

IPC: H04N19/593 ,  H04N19/70 ,  H04N19/176 ,  H04N19/132 ,  H04N19/30 ,  H04N19/159 ,  H04N19/105

Abstract: According to one embodiment of the present document, a method for performing efficient intra prediction can be presented. In one embodiment, an MIP procedure can be performed regardless of requirements related to the form of a current block to be coded, and thus signaling is simplified and hardware implementation can have advantages.

公开(公告)号：US20220182639A1

公开(公告)日：2022-06-09

申请号：US17677603

申请日：2022-02-22

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Jungah CHOI ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: According to an embodiment of the present document, in a matrix-based intra prediction (MIP) procedure, the MIP procedure can be performed without conditional restrictions associated with the shapes of blocks, and efficiency for performing MIP can be improved.

公开(公告)号：US20220159294A1

公开(公告)日：2022-05-19

申请号：US17424322

申请日：2020-06-17

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/132 ,  H04N19/11 ,  H04N19/70 ,  H04N19/136

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring image information including a block-based delta pulse code modulation (BDPCM) constraint flag indicating whether or not BDPCM is constrained with respect to an image; acquiring BDPCM-associated information regarding a current block on the basis of the BDPCM constraint flag; and generating reconstructed samples for the current block on the basis of the BDPCM-associated information.

公开(公告)号：US20220132109A1

公开(公告)日：2022-04-28

申请号：US17428138

申请日：2020-02-21

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Jungah CHOI ,  Ling LI

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/593

Abstract: An image decoding method executed by a decoding apparatus according to the present document comprises the steps of: deriving an intra prediction type for the current block from among the intra prediction types; establishing an intra prediction mode candidate list for the current block by executing a process for establishing an intra prediction mode candidate list; selecting an intra prediction mode for the current block on the basis of the intra prediction mode candidate list; and generating prediction samples for the current block on the basis of the intra prediction type and intra prediction mode.

公开(公告)号：US20220021902A1

公开(公告)日：2022-01-20

申请号：US17299630

申请日：2019-11-27

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jungah CHOI ,  Seunghwan KIM

IPC: H04N19/593 ,  H04N19/186 ,  H04N19/105 ,  H04N19/11

Abstract: An image decoding method according to the present document includes: a step for deriving a luma intra prediction mode; and a step for generating a chroma candidate mode list for a chroma block including a preset number of chroma intra candidates by using at least one among a DM, a planar mode, a DC mode, a vertical mode, a horizontal mode, and an up-right diagonal mode, which are derived from the luma intra prediction mode, wherein the DM is a prediction mode corresponding to a center (CR) position of the luma block, and the chroma intra candidates other than the DM can be derived through a duplicate check of the DM and a prediction mode corresponding to any one among the top left (TL), top right (TR), bottom left (BL), and bottom right (BR) of the luma block, the planar mode, the DC mode, the vertical mode, and the horizontal mode.

公开(公告)号：US20220021882A1

公开(公告)日：2022-01-20

申请号：US17294943

申请日：2019-11-27

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Jungah CHOI ,  Seunghwan KIM ,  Jin HEO ,  Jangwon CHOI ,  Jaehyun LIM ,  Ling LI

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/46 ,  H04N19/186 ,  H04N19/169 ,  H04N19/176

Abstract: An image decoding method according to the present document may include: a step for determining whether a current block is a dual-tree type in which individual division structures are applied to a luma component block and a chroma component block of the current block; a step for determining whether the current block is the luma component block to which the dual-tree type is applied, when the current block is determined to be the dual-tree type; a step for parsing a transform skip flag indicating whether a transform skip is applied to the luma component block, when the current block is the luma component block; a step for deriving whether a transform skip is applied to the chroma component block according to a preset condition, when the current block is not the luma component block; and a step for deriving a residual sample on the basis of the transform skip flag and residual information on the current block.