公开(公告)号：US20220038734A1

公开(公告)日：2022-02-03

申请号：US17278481

申请日：2019-09-20

Applicant: LG ELECTRONICS INC.

Inventor： Jaeho LEE ,  Junghak NAM ,  Naeri PARK ,  Jaehyun LIM ,  Hyeongmoon JANG

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

Abstract: Embodiments of the present specification provide a method and a device for processing a video signal. A method for processing an image signal, according to an embodiment of the present specification, comprises the steps of: generating a merge candidate list including a first motion vector and a second motion vector from a spatial merge candidate or a temporal merge candidate of a current block; adding, to the merge candidate list, a third motion vector determined as the average value of the first motion vector and the second motion vector, if the number of merge candidates of the merge candidate list is smaller than the maximum number of merge candidates; and generating a prediction sample of the current block by using a motion vector indicated by a merge index in the merge candidate list.

公开(公告)号：US20220014751A1

公开(公告)日：2022-01-13

申请号：US17293163

申请日：2019-11-14

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

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

Abstract: An embodiment of the present specification provides a method and device for processing video data. A method for processing video data according to an embodiment of the present specification, may comprise: a step of determining whether a pulse code modulation (PCM) mode in which a sample value of a current block of the video data is transmitted through a bitstream is applied; a step of parsing, on the basis of the PCM mode not being applied, an index associated with a reference line for intra prediction of the current block from the bitstream; and a step of generating a prediction sample of the current block on the basis of a reference sample included in the reference line associated with the index.

公开(公告)号：US20210409727A1

公开(公告)日：2021-12-30

申请号：US16625535

申请日：2018-05-11

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/105 ,  H04N19/46 ,  H04N19/18 ,  H04N19/176

Abstract: An intra-prediction method performed by a decoding device, according to the present disclosure, comprises the steps of: deriving an intra-prediction mode for a current block; deriving reference samples of the current block; determining whether a PDPC or UWP for the current block is performed; deriving weights for target sample of the current block when the UWP is performed on the current block; deriving reference samples of the target sample, according to the intra-prediction mode, among the reference samples; and deriving a prediction sample of the target sample by performing weighted sum for the reference samples of the target samples on the basis of the weights.

公开(公告)号：US20210360265A1

公开(公告)日：2021-11-18

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

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：US20210321109A1

公开(公告)日：2021-10-14

申请号：US17353137

申请日：2021-06-21

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jaehyun LIM ,  Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

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

Abstract: A video decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: receiving a bitstream including information about merge data of a current block; checking mh intra flag information for mh intra prediction which is included in the information about the merge data; checking information about a merge triangle prediction on the basis of a checking result that a value of the mh intra flag information is related to checking the information about the merge triangle prediction included in the information about the merge data; deriving prediction samples for the current block on the basis of a result of checking the information about the merge triangle prediction; and generating a reconstructed picture on the basis of the prediction samples.

公开(公告)号：US20210314603A1

公开(公告)日：2021-10-07

申请号：US17348204

申请日：2021-06-15

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Eunyong SON ,  Moonmo KOO ,  Seungwook PARK ,  Yongjoon JEON

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/124 ,  H04N19/503 ,  H04N19/105 ,  H04N19/70 ,  H04N19/182 ,  H04N19/513 ,  H04N19/66

Abstract: A video decoding method performed by a decoding apparatus includes the steps of: deriving control points (CP) for a current block; acquiring movement vectors for the CPs; deriving a sample unit movement vector in the current block on the basis of the acquired movement vectors; and deriving a prediction sample for the current block on the basis of the sample unit movement vector. According to the present invention, it is possible to effectively perform, through sample unit motion vectors, inter-prediction not only in a case where an image in the current block is plane-shifted but also in a case where there are various image distortions.

公开(公告)号：US20210297677A1

公开(公告)日：2021-09-23

申请号：US16319637

申请日：2016-07-26

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Junghak NAM

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

Abstract: An intra-prediction method according to the present invention comprises the steps of: acquiring intra-prediction mode information from a bitstream; deriving neighboring reference samples of a current block; determining an intra-directional mode for the current block; deriving a predicted block for the current block based on the intra-directional mode and the neighboring reference samples; deriving template reference samples based on the neighboring reference samples; a template reference block based on the template reference samples; and generating a modified predicted block based on the predicted block and the template reference block. The present invention can generate a modified predicted block based on an intra-predicted block and a template reference block, thereby improving the intra-prediction performance.

公开(公告)号：US20210274207A1

公开(公告)日：2021-09-02

申请号：US17242646

申请日：2021-04-28

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/513 ,  H04N19/115 ,  H04N19/176

Abstract: An image decoding method performed by a decoding apparatus, includes deriving a history-based motion vector prediction (HMVP) buffer for a current block based on a history, and deriving motion information of the current block based on an HMVP candidate included in the HMVP buffer, thereby increasing inter prediction efficiency.

公开(公告)号：US20200260072A1

公开(公告)日：2020-08-13

申请号：US16818677

申请日：2020-03-13

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：US20190306511A1

公开(公告)日：2019-10-03

申请号：US16306837

申请日：2016-06-03

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Bumshik LEE

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/105 ,  H04N19/46 ,  H04N19/124 ,  H04N19/33 ,  H04N19/176

Abstract: An intra-prediction method according to the present invention comprises the steps of: obtaining information on an intra-prediction mode from a bitstream; determining an intra-prediction mode for a current block on the basis of the information on the intra-prediction mode; determining whether to apply coefficient induced intra-prediction (CIIP) to the current block; deriving neighboring samples of the current block on the basis of the determination of whether to apply the CIIP; and generating predicted samples of the current block on the basis of the intra-prediction mode and the neighboring samples. According to the present invention, corrected or improved neighboring samples can be generated, whereby intra-prediction performance can be improved.