公开(公告)号：US20210297684A1

公开(公告)日：2021-09-23

申请号：US16325994

申请日：2016-08-19

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Sunmi YOO ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/82 ,  H04N19/46 ,  H04N19/176

Abstract: The present invention provides a method for decoding a video signal, which includes: generating a first prediction block according to a prediction mode of a current block; checking the prediction mode of a neighboring block adjacent to the current block; generating a second prediction block based on the prediction mode of the neighboring block; generating a final prediction block by applying a weight to the first prediction block and the second prediction block; and reconstructing the video signal by using the final prediction block.

公开(公告)号：US20210281833A1

公开(公告)日：2021-09-09

申请号：US17257169

申请日：2019-07-02

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/423 ,  H04N19/44

Abstract: Embodiments of the present disclosure provide a method and an apparatus for processing a video signal through intra prediction. A method for processing a video signal according to an embodiment of the present disclosure may include: checking that intra prediction is applied to a current block including a current sample to be predicted; determining a first reference sample value on a first reference location from at least one of samples positioned at an upper horizontal line and a left vertical line adjacent to the current block, based on an intra-prediction direction of the current block; determining a second reference sample value on a second reference location positioned in an opposite direction to the intra-prediction direction from a location of the current sample or the first reference location; determining a distance between the first reference location and the current sample as a first distance and determining a distance between the second reference location and the current sample as a second distance; and generating a prediction value of the current sample using the linear interpolation prediction based on a sample value of the first reference sample, the first distance, a sample value of the second reference sample, and the second distance.

公开(公告)号：US20210211667A1

公开(公告)日：2021-07-08

申请号：US17207162

申请日：2021-03-19

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/122 ,  H04N19/136 ,  H04N19/176 ,  H04N19/196

Abstract: A method for decoding a picture performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information, deriving a quantized transform coefficient for a current block based on the residual information included in the bitstream, deriving a transform coefficient from the quantized transform coefficient based on a dequantization process, deriving a residual sample for the current block by applying an inverse transform to the derived transform coefficient, and generating a reconstructed picture based on the residual sample for the current block.

公开(公告)号：US20200374516A1

公开(公告)日：2020-11-26

申请号：US16769429

申请日：2017-12-04

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Junghak NAM ,  Sunmi YOO ,  Jangwon CHOI

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61 ,  H04N19/44 ,  H04N19/625

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises a step of obtaining information on an intra prediction mode of a current chroma block and a transform coefficients, a step of generating a prediction sample based on the intra prediction mode of the current chroma block, a step of generating a residual sample using the transform coefficients of the current chroma block based on the transform information of the corresponding luma block of the current chroma block, and a step of generating a reconstruction sample based on the prediction sample and the residual sample.

公开(公告)号：US20200329236A1

公开(公告)日：2020-10-15

申请号：US16913731

申请日：2020-06-26

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：US20200288146A1

公开(公告)日：2020-09-10

申请号：US15932376

申请日：2016-05-02

Applicant: LG Electronics Inc.

Inventor： Yongjoon JEON ,  Jin HEO ,  Sunmi YOO

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/117

Abstract: An image processing method based on an intra-prediction mode and an apparatus for the same. Particularly, the method may include deriving an intra-prediction mode of a current block, constructing a reference sample to be used for a prediction of the current block from a neighboring sample of the current block, generating a prediction block of the current block based on the intra-prediction mode by using the reference sample, and performing a post filtering by using an adjacent sample of the prediction sample for each prediction sample in the prediction block.

公开(公告)号：US20200045311A1

公开(公告)日：2020-02-06

申请号：US16339338

申请日：2017-09-28

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/196

Abstract: The present invention relates to a method for decoding a chroma block of a video signal, wherein the method comprises: a step of determining whether or not an intra prediction mode of the chroma block is being derived; a step of determining the intra prediction mode of the chroma block by using a prediction mode derivation method when the intra prediction mode of the chroma block is being derived; and a step of decoding the chroma block on the basis of the intra prediction mode of the chroma block, and wherein the prediction mode derivation method comprises: a step of acquiring a template prediction value by using a reference pixel neighboring a predefined template; a step of determining a template prediction mode that minimizes the difference between the predefined template and the template prediction value; and a step of setting the template prediction mode to the intra prediction mode of the chroma block.

公开(公告)号：US20200021806A1

公开(公告)日：2020-01-16

申请号：US16507558

申请日：2019-07-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/46

Abstract: Provided is a video decoding method performed by a decoding apparatus, which includes: obtaining intra prediction information of the current block through a bitstream; deriving MPM (Most Probable Mode) list including MPM candidates of the current block; when a value of a MPM flag is 0, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, in which the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates; deriving a prediction sample of the current block based on the intra prediction mode; and deriving a reconstructed picture based on the prediction sample, in which the intra prediction information includes the MPM flag, the intra prediction information includes the remaining intra prediction mode information when the value of the MPM flag is 0, the MPM flag is coded through a fixed length (FL) binarization process, a binarization parameter for the FL binarization process is 1, the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and a binarization parameter for the TB binarization process is 60.

公开(公告)号：US20190238882A1

公开(公告)日：2019-08-01

申请号：US16332735

申请日：2017-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Sunmi YOO

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

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：US20190238863A1

公开(公告)日：2019-08-01

申请号：US16338583

申请日：2017-08-14

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Hyeongmoon JANG ,  Jin HEO

IPC: H04N19/176 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: The present invention provides a method for decoding a chroma block of a video signal, comprising the steps of: inducing division information of a luma block, wherein the division information of the luma block includes split depth information of the luma block; parsing depth inheritance information of the chroma block from a video signal, wherein the depth inheritance information indicates the degree of use of the split depth information of the luma block; inducing division information of the chroma block on the basis of the split depth information of the luma block and/or the depth inheritance information, wherein the division information of the chroma block includes split depth information of the chroma block; and decoding the chroma block on the basis of the division information of the chroma block.