公开(公告)号：US20220353503A1

公开(公告)日：2022-11-03

申请号：US17851953

申请日：2022-06-28

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/13 ,  H04N19/119 ,  H04N19/124 ,  H04N19/176 ,  H04N19/61

Abstract: The present invention discloses a method for encoding/decoding a video signal and an apparatus for the method. More specifically, a method for decoding a video signal comprises generating a residual block of a current block by performing entropy decoding on the video signal; if size of the current block is smaller than a predetermined first size, parsing a transform skip flag which indicates whether a transform skip is applied to the current block; determining whether to parse a primary transform flag which indicates whether a primary transform is applied to the current block; if it is determined to parse the primary transform flag, parsing the primary transform flag; and if the primary transform flag indicates that a primary transform is applied to the current block, generating a primary inverse transformed transform block of the current block by performing a primary inverse transform to the residual block.

公开(公告)号：US20220256165A1

公开(公告)日：2022-08-11

申请号：US17618709

申请日：2020-06-15

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Junghak NAM

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: An image decoding method according to the present document comprises the steps of: acquiring, from a bitstream, image information including prediction-related information and residual information; deriving an inter prediction mode for a current block on the basis of the prediction-related information; deriving motion information of the current block on the basis of the inter prediction mode, wherein the motion information includes an L0 motion vector for L0 prediction and an L1 motion vector for L1 prediction; generating prediction samples of the current block on the basis of the motion information; deriving residual samples on the basis of the residual information; and generating reconstructed samples on the basis of the prediction samples and the residual samples.

公开(公告)号：US20220182619A1

公开(公告)日：2022-06-09

申请号：US17570086

申请日：2022-01-06

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/14 ,  H04N19/86 ,  H04N19/119 ,  H04N19/96 ,  H04N19/182 ,  H04N19/186

Abstract: The present invention discloses an image coding/decoding method and an apparatus for the method. More specifically, a method for filtering an image by a decoding apparatus comprises deriving boundaries of a block divided into quad-tree plus binary-tree structure; determining an edge among boundaries of the block to which de-blocking filtering is applied; determining a type of de-blocking filtering to be applied to the edge; and performing de-blocking filtering to a picture sample restored according to the de-blocking filtering type, wherein the edge or the type of de-blocking filtering is determined by considering width or height of the block.

公开(公告)号：US20220141485A1

公开(公告)日：2022-05-05

申请号：US17431777

申请日：2020-03-04

Applicant: LG ELECTRONICS INC.

Inventor： Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N19/172 ,  H04N19/11 ,  H04N19/132 ,  H04N19/139 ,  H04N19/109 ,  H04N19/196 ,  H04N19/52

Abstract: According to the present disclosure of the present document, prediction can be performed on the basis of information related to the maximum number of block vector candidates included in a merge candidate list for the IBC merge mode, and thus information for IBC, which is distinguished from information used in inter prediction, can be signaled separately, and the efficiency of screen content coding (SCC) can be increased.

公开(公告)号：US20220116645A1

公开(公告)日：2022-04-14

申请号：US17555190

申请日：2021-12-17

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Seunghwan KIM

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/139 ,  H04N19/132 ,  H04N19/119 ,  H04N19/70

Abstract: The present disclosure relates to an image decoding and encoding method which can efficiently perform inter-prediction by applying a regular merge mode to the current block on the basis of the case in which an MMVD mode, a merge sub-block mode, a CIIP mode, and a partitioning mode, in which prediction is performed by dividing the current block into two partitions, are not available for the current block.

公开(公告)号：US20220116623A1

公开(公告)日：2022-04-14

申请号：US17561614

申请日：2021-12-23

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

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

Abstract: According to embodiments of the present document, a prediction procedure can be performed for image video coding, and the prediction procedure can comprise merge mode motion vector differences (MMVD) and symmetric motion vector differences (SMVD) according inter prediction. The inter prediction can be performed on the basis of reference pictures of a current picture, and types of the reference pictures (e.g. a long-term reference picture, a short-term reference picture, etc.) can be considered for the inter prediction. Accordingly, performance and coding efficiency in the prediction procedure can be increased.

公开(公告)号：US20220109828A1

公开(公告)日：2022-04-07

申请号：US17550812

申请日：2021-12-14

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

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

Abstract: An image decoding method according to the present document may comprise: a step for deriving an inter prediction mode from encoded information; a step for constructing reference pictures lists; a step for deriving motion information including reference picture indices for symmetric motion vector differences (SMVD) on the basis of reference pictures included in the reference picture lists; and a step for generating prediction samples on the basis of the motion information. The reference picture indices for SMVD may be derived on the basis of short-term reference pictures included in the reference picture lists.

公开(公告)号：US20220078440A1

公开(公告)日：2022-03-10

申请号：US17478605

申请日：2021-09-17

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: A video decoding method comprises: deriving L0 and L1 motion vectors of a current block; deriving decoder-side motion vector refinement (DMVR) flag information indicating whether to apply a DMVR to the current block; when the DMVR flag information indicates that the DMVR is to be applied to the current block, deriving refined L0 and L1 motion vectors based on the L0 and L1 motion vectors by applying the DMVR to the current block; deriving prediction samples of the current block based on the refined L0 and L1 motion vectors; and generating reconstructed samples of the current block based on the predicted samples, wherein deriving DMVR flag information comprises deriving the DMVR flag information by applying the DMVR to the current block when the height of the current block is 8 or more, and when the values of L0 and L1 luma weighted prediction flag information are both 0.

公开(公告)号：US20220078408A1

公开(公告)日：2022-03-10

申请号：US17420611

申请日：2020-01-02

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

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

Abstract: A video signal processing method comprises obtaining a merge subblock index for a current block for which a parameter for subblock-based inter prediction is derived from a surrounding block; obtaining control point motion vectors for control points of the current block, based on the merge subblock index, the merge subblock index being related to one candidate in a subblock-based merge candidate list; applying one or more offsets to the control point motion vectors, based on a merge with motion vector direction index for refining the control point motion vectors; determining a motion vector for each subblock based on the respective positions of the subblocks in the current block and the control point motion vectors to which the one or more offsets have been applied; and generating prediction samples for the current block based on a reference picture related to the subblock merge index and the motion vectors for each subblock.

公开(公告)号：US20210344932A1

公开(公告)日：2021-11-04

申请号：US17360734

申请日：2021-06-28

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

IPC: 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.