公开(公告)号：US20220337829A1

公开(公告)日：2022-10-20

申请号：US17857322

申请日：2022-07-05

Applicant: LG Electronics Inc.

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

Abstract: According to a disclosure of the present document, information associated with a deblocking filter for performing deblocking filtering may include chroma component filter parameter information associated with deblocking parameter offsets that are applied to a chroma component. The chroma component filter parameter information may be selectively signaled on the basis of a chroma tool offset presence flag. Therefore, an effect of increasing overall coding efficiency may be derived by signaling chroma component filter parameter information only in the case of not a monochrome color format.

公开(公告)号：US20220329789A1

公开(公告)日：2022-10-13

申请号：US17733933

申请日：2022-04-29

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Sunmi Yoo ,  Ling Li ,  Jangwon Choi ,  Jungah Choi

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

Abstract: An image decoding method according to the present document derives a left mode, which is a candidate intra prediction mode for a left peripheral block of a current block, derives an upper mode, which is a candidate intra prediction mode for an upper peripheral block of the current block, constructs an MPM list on the basis of the left mode and the upper mode, derives an intra prediction mode of the current block on the basis of the MPM list, generates prediction samples of the current block on the basis of the intra prediction mode, generates a restoration picture of the current block on the basis of the prediction samples, and derives the left mode or the upper mode as one from among candidate intra prediction modes of the MPM list, on the basis of when the left mode and the upper mode are not the same and the left mode and the upper mode are respectively a planar mode and a DC mode.

公开(公告)号：US20220174316A1

公开(公告)日：2022-06-02

申请号：US17677602

申请日：2022-02-22

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/593 ,  H04N19/59 ,  H04N19/105 ,  H04N19/70 ,  H04N19/159 ,  H04N19/176 ,  H04N19/132 ,  H04N19/18

Abstract: According to one embodiment of the present document, in a matrix-based intra prediction (MIP) process, the MIP process can be performed regardless of requirements related to the forms of blocks, and MIP performance efficiency can be increased.

公开(公告)号：US20220174272A1

公开(公告)日：2022-06-02

申请号：US17547835

申请日：2021-12-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/136

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include identifying a prediction mode of a current block, determining a candidate intra prediction mode for the current block, based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block being an intra prediction mode, generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode, and determine an intra prediction mode of the current block based on the candidate intra prediction mode list. In this case, the candidate intra prediction mode may be determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode.

公开(公告)号：US20220174271A1

公开(公告)日：2022-06-02

申请号：US17548156

申请日：2021-12-10

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining an MPM (most probable mode) candidate of a current block based on a prediction mode of a neighboring block located around the current block, generating an MPM list of the current block based on the MPM candidate, and determining an MPM candidate identified by an intra prediction mode indicator among a plurality of MPM candidates included in the MPM list to be a prediction mode of the current block. The MPM candidate determined based on the prediction mode of the neighboring block may be determined to be a predetermined intra prediction mode, based on the prediction mode of any one of the current block and the neighboring block being a matrix based intra prediction mode.

公开(公告)号：US20220166968A1

公开(公告)日：2022-05-26

申请号：US17438567

申请日：2019-11-14

Applicant: LG Electronics Inc.

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/132 ,  H04N19/167

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining reference line index information and prediction information for a current block; determining an intra prediction mode of the current block on the basis of the prediction information; deriving a reference sample of the current block on the basis of the intra prediction mode and the reference line index information; and generating a prediction sample of the current block on the basis of the reference sample, wherein the intra prediction mode includes a non-directional intra prediction mode, and the reference sample is derived from among surrounding samples of the current block on the basis of the non-directional intra prediction mode and the reference line index information.

公开(公告)号：US20220159239A1

公开(公告)日：2022-05-19

申请号：US17442270

申请日：2020-03-23

Applicant: LG Electronics Inc.

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

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

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: deriving an intra prediction type for a current block from intra prediction types; deriving a first intra prediction mode for a neighboring block to the left of the current block; deriving a second intra prediction mode for a neighboring block above the current block; constructing an intra prediction mode candidate list of the current block on the basis of the first intra prediction mode and the second intra prediction mode; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and generating prediction samples of the current block on the basis of the intra prediction type and the intra prediction mode.

公开(公告)号：US20220150537A1

公开(公告)日：2022-05-12

申请号：US17431348

申请日：2020-02-26

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image decoding method according to the present document comprises the steps of: acquiring, from a bitstream, reference line index information indicating a reference line to be used for intra prediction of a current block; constructing a most probable mode (MPM) list by deriving candidate intra prediction modes of the current block on the basis of the value of the reference line index information; deriving the intra prediction mode of the current block on the basis of the MPM list; generating prediction samples for the current block on the basis of the intra prediction mode; and generating restoration samples for the current block on the basis of the prediction samples, wherein, on the basis of the case in which the value of the reference line index information is not zero, one of the candidate intra prediction modes is a DC mode and the number of candidate intra prediction modes including the DC mode is 5.

公开(公告)号：US20220109872A1

公开(公告)日：2022-04-07

申请号：US17502946

申请日：2021-10-15

Applicant: LG Electronics Inc.

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

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include parsing, from a bitstream, first information specifying whether block difference pulse code modulation (BDPCM) applies to an intra-predicted current block, determining a prediction direction of BDPCM for the current block and generating a residual block of the current block based on the determined prediction direction of BDPCM, based on the first information specifying that BDPCM applies to the current block, generating a prediction block of the current block, by performing intra prediction based on an intra prediction mode of the current block, and reconstructing the current block based on the residual block and the prediction block.

公开(公告)号：US20220070472A1

公开(公告)日：2022-03-03

申请号：US17418378

申请日：2019-12-31

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/70 ,  H04N19/132 ,  H04N19/167

Abstract: A method for decoding a video performed by a decoding device according to the present document comprises: a step for receiving residual information for a current block; a step for parsing one sign flag for a current sub-block of the current block, wherein the one sign flag indicates whether all signs of non-zero residual coefficients of the current sub-block are the same; a step for deriving the non-zero residual coefficients on the basis of sign information for the non-zero residual coefficients when the value of the one sign flag is 1; a step for deriving residual samples on the basis of the non-zero residual coefficients; and a step for restoring a current picture on the basis of the residual samples.