公开(公告)号：US20220086443A1

公开(公告)日：2022-03-17

申请号：US17418690

申请日：2019-12-24

Applicant: Electronics and Telecommunications Research Institute ,  CHIPS&MEDIA, INC

Inventor： Sung Chang LIM ,  Jung Won KANG ,  Ha Hyun LEE ,  Jin Ho LEE ,  Hui Yong KIM ,  Dae Yeon KIM

IPC: H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: Disclosed herein is a method of encoding/decoding an image. The image decoding method includes decoding information on a quantization matrix from a bitstream, acquiring a quantization matrix of a current block based on the information on the quantization matrix, and dequantizing the current block using the quantization matrix of the current block. The acquiring of the quantization matrix of the current block includes deriving a single identifier using at least one of a size of the current block, a prediction mode or a color component, and acquiring the quantization matrix of the current block based on the single identifier.

公开(公告)号：US20220086428A1

公开(公告)日：2022-03-17

申请号：US17420084

申请日：2019-12-27

Applicant: Electronics and Telecommunications Research Institute ,  INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY

Inventor： Sung Chang LIM ,  Jung Won KANG ,  Ha Hyun LEE ,  Jin Ho LEE ,  Hui Yong KIM ,  Yung Lyul LEE ,  Myung Jun KIM ,  Nam Uk KIM ,  Yang Woo KIM ,  Ji Yeon JUNG ,  Jae Gon KIM

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

Abstract: An image encoding/decoding method is provided. An image decoding method of the present invention may comprise restoring an intra-prediction mode of a current chroma block, deriving at least one representative value based on a neighboring sample of the current chroma block and a neighboring sample of a corresponding luma block corresponding to the current chroma block in case the intra-prediction mode is a CCLM (Cross-Component Linear Model) mode, deriving a parameter of CCLM by using the at least one representative value, and generating a prediction block of the current chroma block by using the parameter of CCLM.

公开(公告)号：US20220070450A1

公开(公告)日：2022-03-03

申请号：US17401424

申请日：2021-08-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung Hyun CHO ,  Jung Won KANG ,  Sung Chang LIM ,  Hyun Suk KO ,  Dong San JUN ,  Jin Ho LEE ,  Ha Hyun LEE ,  Hui Yong KIM ,  Jin Soo CHOI

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/96 ,  H04N19/119

Abstract: An image encoding/decoding method and apparatus for performing intra prediction are provided. An image decoding method of the present invention comprises deriving an intra-prediction mode for a current block, determining whether or not a left boundary or an upper boundary of the current block is a boundary of a predetermined image region, configuring a reference sample by using at least one reconstructed sample included in at least one reconstructed sample line adjacent to the current block based on the determination result, and performing intra-prediction for the current block based on the intra-prediction mode and the reference sample.

公开(公告)号：US20220030227A1

公开(公告)日：2022-01-27

申请号：US17401578

申请日：2021-08-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Suk KO ,  Jin Ho LEE ,  Sung Chang LIM ,  Jung Won KANG ,  Ha Hyun LEE ,  Dong San JUN ,  Seung Hyun CHO ,  Hui Yong KIM ,  Jin Soo CHOI

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/159 ,  H04N19/105 ,  H04N19/593 ,  H04N19/184 ,  H04N19/96

Abstract: The present invention relates to an intra prediction method and apparatus. The image decoding method according to the present invention may comprise decoding information on intra prediction; and generating a prediction block by performing intra prediction for a current block based on the information on intra prediction. The information on intra prediction may include information on an intra prediction mode, and the intra prediction mode may include a curved intra prediction mode.

公开(公告)号：US20210409687A1

公开(公告)日：2021-12-30

申请号：US17474514

申请日：2021-09-14

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang LIM ,  Jong Ho KIM ,  Hae Chul CHOI ,  Hui Yong KIM ,  Ha Hyun LEE ,  Jin Ho LEE ,  Se Yoon JEONG ,  Suk Hee CHO ,  Jin Soo CHOI ,  Jin Woo HONG ,  Jin Woong KIM

IPC: H04N19/105 ,  H04N19/503 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/11 ,  H04N19/157

Abstract: Provided are an image encoding method and device. When carrying out image encoding for a block within a slice, at least one block in a restored block of the slice is set as a reference block. When this is done, the encoding parameters of the reference block are distinguished, and the block to be encoded is encoded adaptively based on the encoding parameters.

公开(公告)号：US20210392372A1

公开(公告)日：2021-12-16

申请号：US17372594

申请日：2021-07-12

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyun Suk KO ,  Sung Chang LIM ,  Jung Won KANG ,  Jin Ho LEE ,  Ha Hyun LEE ,  Dong San JUN ,  Hui Yong KIM

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/184

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise configuring an MPM list based on intra-prediction modes of neighbor blocks of a current block and a number of frequencies of the intra-prediction modes of the neighbor blocks, deriving an intra-prediction mode of the current block based on the MPM list, and performing intra-prediction for the current block based on the intra-prediction mode.

公开(公告)号：US20210368172A1

公开(公告)日：2021-11-25

申请号：US16648470

申请日：2018-09-20

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Chang LIM ,  Jung Won KANG ,  Hyun Suk KO ,  Jin Ho LEE ,  Ha Hyun LEE ,  Dong San JUN ,  Hui Yong KIM

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/159 ,  H04N19/46 ,  H04N19/186 ,  H04N19/169 ,  H04N19/176

Abstract: The present invention relates to an image encoding/decoding method. The image decoding method includes splitting a coding tree unit (CTU) into at least one coding unit (CU) according to a block splitting structure and performing CU-based decoding, in which the block partition structure is configured such that at least one of binary tree splitting and ternary tree splitting is performed after quadtree splitting is performed.

公开(公告)号：US20210352273A1

公开(公告)日：2021-11-11

申请号：US17278158

申请日：2019-09-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang LIM ,  Jung Won KANG ,  Ha Hyun LEE ,  Jin Ho LEE ,  Hui Yong KIM

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/159 ,  H04N19/196 ,  H04N19/132

Abstract: There is provided a method and apparatus of encoding/decoding an intra prediction mode. The method comprises deriving an intra prediction mode with respect to a current block, constructing a reference sample for the current block on the basis of the derived intra prediction mode, and performing the intra prediction with respect to the current block using the derived intra prediction mode and the constructed reference sample, wherein the intra prediction mode is derived on the basis of a most probable mode (MPM).

公开(公告)号：US20210344946A1

公开(公告)日：2021-11-04

申请号：US17378075

申请日：2021-07-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Gun BANG ,  Hui Yong KIM ,  Gwang Hoon PARK ,  Woo Woen GWUN ,  Tae Hyun KIM ,  Won Jun LEE

IPC: H04N19/517 ,  H04N19/184 ,  H04N19/182 ,  H04N19/176

Abstract: There is provided a method of decoding an image, the method comprising: decoding information for motion information prediction of a current block from a bitstream, predicting motion information of the current block based on the information, refining motion information of the current block by using the decoded information and the predicted motion information of the current block and reconstructing the current block based on the refined motion information of the current block.

公开(公告)号：US20210297658A1

公开(公告)日：2021-09-23

申请号：US17273119

申请日：2019-09-03

Applicant: Electronics and Telecommunications Research Institute ,  HANBAT NATIONAL UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Ha Hyun LEE ,  Jung Won KANG ,  Sung Chang LIM ,  Jin Ho LEE ,  Hui Yong KIM ,  Hae Chul CHOI ,  Aram BACK ,  Dae Hyeok GWON

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/70 ,  H04N19/117 ,  H04N19/82 ,  H04N19/176

Abstract: An image encoding/decoding method is disclosed. Present invention of the method of decoding an image comprises determining a prediction mode for a current block and performing prediction on the current block on the basis of the determined prediction mode.