公开(公告)号：US10904567B2

公开(公告)日：2021-01-26

申请号：US16475002

申请日：2016-12-28

Applicant: LG Electronics Inc. ,  EWHA UNIVERSITY-INDUSTRY COLLABORATION FOUNDATION

Inventor： Je-Won Kang ,  Soo Kyung Ryu ,  Jaehyun Lim ,  Sunmi Yoo ,  Jaeho Lee ,  Min-Joo Kang

IPC: H04N19/593 ,  H04N19/132 ,  H04N19/174 ,  H04N19/18 ,  H04N19/182

Abstract: Disclosed is a method for encoding/decoding a still image or moving image based on an intra-prediction mode and an apparatus supporting the same. Particularly, a method for processing an image based on an intra prediction mode may include determining an intra prediction mode set used for an intra prediction in a current prediction processing unit among multiple intra prediction mode sets having different resolutions with each other, wherein the resolution represents a degree of distribution of the intra prediction mode in the intra prediction mode set; deriving an intra prediction mode applied to the current prediction processing unit in the determined intra prediction mode set using index information received from an encoder; and generating a prediction sample of the current prediction processing unit based on the derived intra prediction mode, and each of the intra prediction mode sets includes one or more intra prediction modes.

公开(公告)号：US10785478B2

公开(公告)日：2020-09-22

申请号：US16301088

申请日：2016-05-12

Applicant: LG Electronics Inc.

Inventor： Sunmi Yoo ,  Bumshik Lee

IPC: H04N19/192 ,  H04N19/11 ,  H04N19/105 ,  H04N19/593 ,  H04N19/132 ,  H04N19/159 ,  H04N19/124 ,  H04N19/176 ,  H04N19/46

Abstract: A picture encoding method that includes selecting a Vth basis function for a current block according to a specific order from among basis functions; deriving a Vth expansion coefficient on the basis of the selected Vth basis function; calculating a Vth weighted error criterion on the basis of the selected Vth basis function and the derived Vth expansion coefficient; and encoding and outputting information indicating the Vth number as a basis number when the value of the Vth weighted error criterion is less than a specific critical value.

公开(公告)号：US10681373B2

公开(公告)日：2020-06-09

申请号：US16332735

申请日：2017-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Naeri Park ,  Sunmi Yoo

IPC: H04N11/02 ,  H04N19/52 ,  H04N19/176 ,  H04N19/105 ,  H04N19/70 ,  H04N19/55

Abstract: An inter-prediction method according to the present invention comprises the steps of: deriving a first motion vector of a current block; deriving a first reference block with respect to a current subunit of the current block on the basis of the first motion vector, the current subunit being adjacent to a target boundary of the current block; deriving a second reference block with respect to the current subunit on the basis of a second motion vector of a neighboring block adjacent to the target boundary; and generating prediction samples on the basis of an illumination compensation (IC)-based weighted sum of the first reference block and second reference block. The present invention enables reduction of the amount of data of additional information as well as efficient illumination compensation-based inter-prediction and block boundary error reduction.

公开(公告)号：US10574984B2

公开(公告)日：2020-02-25

申请号：US15758967

申请日：2016-08-25

Applicant: LG ELECTRONICS INC.

Inventor： Eunyong Son ,  Seungwook Park ,  Yongjoon Jeon ,  Jin Heo ,  Moonmo Koo ,  Sunmi Yoo

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/82

Abstract: An intra prediction method includes the steps of: acquiring intra prediction mode information from a bitstream; deriving neighboring samples of a current block; determining an intra prediction mode for the current block on the basis of the intra prediction mode information; deriving a prediction sample of the current block on the basis of the intra prediction mode and the neighboring samples; determining filtering reference samples for the prediction sample on the basis of the intra prediction mode; and deriving a filtered prediction sample by applying filtering to the prediction sample on the basis of the filtering reference samples. According to the present invention, a prediction sample can be adaptively filtered according to the intra prediction mode, and intra prediction performance can be improved.

公开(公告)号：US10397611B2

公开(公告)日：2019-08-27

申请号：US15510807

申请日：2015-09-07

Applicant: LG Electronics Inc.

Inventor： Sunmi Yoo ,  Jungdong Seo ,  Junghak Nam ,  Sehoon Yea

IPC: H04N19/597 ,  H04N19/50 ,  H04N19/176 ,  H04N19/70 ,  H04N19/105 ,  H04N19/593 ,  H04N19/146

Abstract: The present invention relates to a device and a method for coding a 3D video, a decoding method, according to the present invention, comprising the steps of: receiving a single depth mode (SDM) flag information indicating whether the SDM is applied to a current block; and if the SDM is applied to the current block, generating a prediction sample on the basis of a first candidate and a second candidate derived by using spatial neighboring reference samples of the current block, wherein the number of the spatial neighboring reference samples is two, and among the neighboring reference samples, the first neighboring reference sample is positioned on the left side of the current block, and the second neighboring reference sample is positioned on the upper side of the current block. According to the present invention, the current block may be predicted on the basis of one representative value derived by using the predetermined neighboring reference sample, and the complexity of an operation may be decreased, and coding efficiency may be increased.

公开(公告)号：US10070147B2

公开(公告)日：2018-09-04

申请号：US15028806

申请日：2014-10-20

Applicant: LG ELECTRONICS INC.

Inventor： Taesup Kim ,  Sehoon Yea ,  Jin Heo ,  Jungdong Seo ,  Sunmi Yoo ,  Junghak Nam

IPC: H04N19/597 ,  H04N19/176 ,  H04N19/119 ,  H04N19/513 ,  H04N19/137 ,  H04N19/105 ,  H04N19/139

Abstract: The present invention relates to a method for constituting a merge candidate list by using a view synthesis prediction (VSP) and the like in multi-view video coding. The method for constituting the merge candidate list according to the present invention comprises the steps of: determining a prediction mode for a current block; inducing, as a merge candidate, motion information from neighboring blocks of the current block when the prediction mode for the current block is a merge mode or a skip mode; and constituting the merge candidate list by using the motion information of the neighboring blocks and the deep parity information induced from the neighboring blocks of the current block.

公开(公告)号：US10063887B2

公开(公告)日：2018-08-28

申请号：US15028649

申请日：2014-10-20

Applicant: LG ELECTRONICS INC.

Inventor： Junghak Nam ,  Jungdong Seo ,  Sunmi Yoo ,  Sehoon Yea ,  Jin Heo ,  Taesup Kim ,  Moonmo Koo

IPC: H04N19/52 ,  H04N19/597 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/597 ,  H04N19/176 ,  H04N19/182 ,  H04N19/52

Abstract: A method inducing video information required for decoding a current block by entropy-decoding a bitstream; inducing a first disparity vector based on a neighboring block of the current block in the same view by using the video information, inducing a second disparity vector by using the first disparity vector and a reference view depth, and inducing a third disparity vector using the difference between the first disparity vector and the second disparity vector; inducing a prediction sample of the current block by using one of the first disparity vector, the second disparity vector, or the third disparity vector; and applying filtering to a current picture which has been restored using the prediction sample.

公开(公告)号：US20250159210A1

公开(公告)日：2025-05-15

申请号：US19022299

申请日：2025-01-15

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Jin Heo ,  Seunghwan Kim ,  Sunmi Yoo ,  Ling Li ,  Jungah Choi

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

Abstract: A video decoding method performed by a decoding apparatus according to the present disclosure includes deriving one of a plurality of cross-component linear model (CCLM) prediction mode as a CCLM prediction mode of the current chroma block, deriving a sample number of neighboring chroma samples of the current chroma block based on the CCLM prediction mode of the current chroma block, a size of the current chroma block, and a specific value; deriving the neighboring chroma samples of the sample number, calculating CCLM parameters based on the neighboring chroma samples and the down sampled neighboring luma samples, deriving prediction samples for the current chroma block based on the CCLM parameters and the down sampled luma samples and generating reconstructed samples for the current chroma block based on the prediction samples, wherein the specific value is derived as 2.

公开(公告)号：US12284340B2

公开(公告)日：2025-04-22

申请号：US18644829

申请日：2024-04-24

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Jaeho Lee ,  Jangwon Choi ,  Jungdong Seo ,  Jin Heo

IPC: H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

Abstract: A method by which a decoding device performs image decoding, according to the present invention, comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring samples including left neighboring samples and upper neighboring samples of the current block; deriving reference samples for prediction of a target sample among the neighboring samples on the basis of the position of the target sample of the current block and the prediction angle of the intra prediction mode; determining an interpolation filter for the target sample; and deriving the prediction sample of the target sample on the basis of the interpolation filter and the reference samples.

公开(公告)号：US20250113024A1

公开(公告)日：2025-04-03

申请号：US18980322

申请日：2024-12-13

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.