公开(公告)号：US20230319261A1

公开(公告)日：2023-10-05

申请号：US18206411

申请日：2023-06-06

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Seunghwan Kim

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/50

CPC classification number: H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/50 ,  H04N19/70

Abstract: A decoding method performed by a decoding device, according to the present document, may comprise the steps of: acquiring a sequence parameter set from a bitstream; acquiring a combined inter-picture merge and intra-picture prediction (CIIP) enable flag from the sequence parameter set; determining, on the basis of the CIIP enable flag and the size of a current block, whether a regular merge flag is included in the bitstream; parsing the regular merge flag in the bitstream on the basis that a condition based on the CIIP enable flag and a condition based on the size of the current block are satisfied; generating prediction samples of the current block on the basis of the regular merge flag; and generating a restoration picture on the basis of the prediction samples.

公开(公告)号：US11711524B2

公开(公告)日：2023-07-25

申请号：US17365349

申请日：2021-07-01

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/513 ,  H04N19/70

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/513 ,  H04N19/70

Abstract: Disclosed are a method for encoding a video signal and a device therefor. Specifically, a method for decoding an image based on an inter prediction mode comprises: generating a merging candidate list by using a spatial merge candidate and a temporal merge candidate of a current block; obtaining a merge index indicating a certain merge candidate in the merging candidate list; and generating a prediction block of the current block by using motion information of the certain merge candidate, wherein the generating of the merging candidate list may include adding a first merge candidate indicating a collocated block specified by motion information of the spatial merge candidate to the merging candidate list if a reference picture of the spatial merge candidate is same as a predetermined picture.

公开(公告)号：US11706442B2

公开(公告)日：2023-07-18

申请号：US17275356

申请日：2019-09-23

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176

Abstract: An image decoding method performed by the decoding apparatus according to this document comprising deriving a temporary reference motion vector for a current block based on a reference candidate block of the current block, deriving a reference motion vector by compressing the temporary reference motion vector based on a shifting operation, deriving a motion vector for the current block based on the reference motion vector, deriving prediction samples for the current block based on the motion vector for the current block, and generating reconstructed samples for the current block based on the prediction samples for the current block, wherein a total number of bits of the binary code representing the reference motion vector is less than a total number of bits of the binary code representing the temporary reference motion vector.

公开(公告)号：US11659199B2

公开(公告)日：2023-05-23

申请号：US17846499

申请日：2022-06-22

Applicant: LG ELECTRONICS INC.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573 ,  H04N19/70

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573 ,  H04N19/70

Abstract: According to embodiments according to the present document, merge mode motion vector differences (MMVD) and symmetric motion vector differences (SMVD) may be performed on the basis of reference picture types and, in particular, short-term reference pictures may be used. Accordingly, prediction performance and coding efficiency in an inter prediction mode may be increased.

公开(公告)号：US11653004B2

公开(公告)日：2023-05-16

申请号：US17360734

申请日：2021-06-28

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/159 ,  H04N19/52

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/52

Abstract: Disclosed herein are a method for decoding a video signal and a device therefor. Specifically, a method for decoding an image based on an inter prediction mode may include: if a merge mode is applied to a current block, generating a merge candidate list by using a spatial neighboring block and a temporal neighboring block of the current block; obtaining a merge index indicating a candidate to be used for an inter prediction of the current block in the merge candidate list; deriving a motion vector of each of subblocks included in the current block based on a motion vector of the candidate used for the inter prediction of the current block; and generating a prediction sample of the current block by using the motion vector of each of subblocks.

公开(公告)号：US11616975B2

公开(公告)日：2023-03-28

申请号：US17542676

申请日：2021-12-06

Applicant: LG ELECTRONICS INC.

Inventor： Jaeho Lee ,  Junghak Nam ,  Naeri Park ,  Hyeongmoon Jang

IPC: H04N19/52 ,  H04N19/119 ,  H04N19/176

Abstract: An image decoding method according to the present document includes obtaining motion prediction information for a current block from a bitstream, generating an affine MVP candidate list for the current block, deriving CPMVPs for CPs of the current block based on the affine MVP candidate list, deriving CPMVDs for the CPs of the current block based on the motion prediction information, deriving CPMVs for the CPs of the current block based on the CPMVPs and the CPMVDs, and deriving prediction samples for the current block based on the CPMVs.

公开(公告)号：US11601640B2

公开(公告)日：2023-03-07

申请号：US17138245

申请日：2020-12-30

Applicant: LG ELECTRONICS INC.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang ,  Jaeho Lee

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/423 ,  H04N19/533 ,  H04N19/70

Abstract: According to an embodiment disclosed in the present specification, a history-based motion vector prediction (HMVP) candidate set with respect to a current block may be derived based on a history, the HMVP candidate set may be updated or initialized according to a condition, and motion information of the current block may be derived based on the HMVP candidate set, through which inter prediction efficiency can be improved.

公开(公告)号：US11595660B2

公开(公告)日：2023-02-28

申请号：US17366722

申请日：2021-07-02

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang ,  Junghak Nam

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

Abstract: A decoding apparatus performs an image decoding method by receiving a bit stream including prediction information of a current block; deriving motion information of the current block on the basis of a merge candidate indicated by a candidate flag of the current block in a merge candidate list; deriving a MVD of the current block on the basis of MVD information of the current block and whether or not integer sample precision or fractional sample precision is used in the motion information; deriving modified motion information of the current block on the basis of the motion information and the MVD; and performing prediction of the current block on the basis of the modified motion information.

公开(公告)号：US11575891B2

公开(公告)日：2023-02-07

申请号：US17481415

申请日：2021-09-22

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon Jang

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: receiving prediction mode information about a current block; receiving intra sub-partitions (ISP)-related information about the current block on the basis of the size and the maximum conversion block size of the current block; deriving an intra prediction mode of the current block on the basis of the prediction mode information; and generating a prediction sample of the current block on the basis of the intra prediction mode and the ISP-related information.

公开(公告)号：US11553176B2

公开(公告)日：2023-01-10

申请号：US17547151

申请日：2021-12-09

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Naeri Park ,  Junghak Nam

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: According to the disclosure of this document, in subblock-based temporal motion vector prediction (sbTMVP), a subblock position for deriving a motion vector in units of a subblock can be efficiently calculated, and through this, video/image coding efficiency can be improved and hardware implementation can be simplified.