公开(公告)号：US20230396769A1

公开(公告)日：2023-12-07

申请号：US18451596

申请日：2023-08-17

申请人： Electronics and Telecommunications Research Institute

发明人： Sung Chang LIM ,  Hui Yong KIM ,  Jin Ho LEE ,  Jin Soo CHOI ,  Jin Woong KIM

IPC分类号： H04N19/126 ,  H04N19/159 ,  H04N19/61 ,  H04N19/196 ,  H04N19/70 ,  H04N19/50 ,  H04N19/463

CPC分类号： H04N19/126 ,  H04N19/159 ,  H04N19/61 ,  H04N19/196 ,  H04N19/70 ,  H04N19/50 ,  H04N19/463 ,  H04N19/198 ,  H04N19/176

摘要： The present invention relates to a method for encoding and decoding a quantized matrix and an apparatus using same, the method for encoding a quantized matrix according to the present invention comprising the steps of: determining a quantization matrix to be used for quantization and quantizing; determining the prediction method used for the quantization of the quantization matrix; and encoding quantization matrix information on the basis of the determined prediction method, wherein the prediction method can be either a prediction method between coefficients in the quantization matrix or a duplicate of the quantization matrix.

公开(公告)号：US20230362356A1

公开(公告)日：2023-11-09

申请号：US18353437

申请日：2023-07-17

申请人： Electronics and Telecommunications Research Institute

发明人： Gun BANG ,  Hui Yong KIM

IPC分类号： H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/597

CPC分类号： H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/597

摘要： Disclosed are region-based image encoding/decoding method and apparatus. The method of decoding an image includes: determining a projection format of a 360-degree video image; determining, on the basis of the determined projection format, a spatial correlation degree between a current block and a neighboring block; and determining, on the basis of the determined spatial correlation degree, a candidate block for predicting the current block.

公开(公告)号：US20230353731A1

公开(公告)日：2023-11-02

申请号：US18345301

申请日：2023-06-30

申请人： Electronics and Telecommunications Research Institute

发明人： Jin Ho LEE ,  Hui Yong KIM ,  Sung Chang LIM ,  Jin Soo CHOI ,  Jin Woong KIM

IPC分类号： H04N19/11 ,  H04N19/107 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/91

CPC分类号： H04N19/11 ,  H04N19/107 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/91

摘要： An image decoding method, according to the present invention, includes the steps of: deriving an MPM candidate mode from neighboring blocks adjacent to a target block to be decoded; generating an MPM list using the MPM candidate mode derived from the neighboring blocks; and deriving an intra prediction mode for the target block to be decoded using the generated MPM list. According to the present invention, image compression efficiency can be improved.

公开(公告)号：US20230308644A1

公开(公告)日：2023-09-28

申请号：US18317800

申请日：2023-05-15

申请人： Electronics and Telecommunications Research Institute

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

IPC分类号： H04N19/107 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/573

CPC分类号： H04N19/107 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/573 ,  H04N19/124

摘要： An image decoding method is disclosed in the present specification. An image decoding method according to the present invention may comprise determining a prediction mode of a current block and performing prediction with respect to the current block on the basis of the determined prediction mode.

公开(公告)号：US20230300340A1

公开(公告)日：2023-09-21

申请号：US18303458

申请日：2023-04-19

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

发明人： Ha Hyun LEE ,  Jung Won KANG ,  Sung Chang LIM ,  Jin Ho LEE ,  Hui Yong KIM ,  Hae Chul CHOI ,  Dae Hyeok GWON ,  Jae Ryun CHOI

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

CPC分类号： H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

摘要： Disclosed herein is a method of decoding an image. The method includes determining a prediction mode of a current block as a merge mode with motion vector difference (MMVD), deriving a merge candidate list of the current block, deriving a motion vector predictor of the current block using the merge candidate list, deriving a motion vector difference of the current block, and deriving a motion vector of the current block using the motion vector predictor and the motion vector difference. Only some of candidates in the merge candidate list are used to derive the motion vector predictor.

公开(公告)号：US20230239467A1

公开(公告)日：2023-07-27

申请号：US18191285

申请日：2023-03-28

申请人： Electronics and Telecommunications Research Institute ,  University-Industry Cooperation Group of Kyung Hee University

发明人： Hui Yong KIM ,  Gwang Hoon PARK ,  Kyung Yong KIM ,  Sung Chang LIM ,  Jin Ho LEE ,  Jin Soo CHOI ,  Jin Woong KIM

IPC分类号： H04N19/11 ,  H04N19/176 ,  H04N19/129 ,  H04N19/186 ,  H04N19/159 ,  H04N19/12 ,  H04N19/18

CPC分类号： H04N19/11 ,  H04N19/176 ,  H04N19/129 ,  H04N19/186 ,  H04N19/159 ,  H04N19/12 ,  H04N19/18 ,  H04N19/61

摘要： The present invention relates to an encoding method and decoding method, and a device using the same. The encoding method according to the present invention comprises the steps of: specifying an intra prediction mode for a current block; and scanning a residual signal by intra prediction of the current block, wherein the step of scanning the residual signal can determine a scanning type for a luminance signal and a chroma signal of the current block according to an intra prediction mode for a luminance sample of the current block.

公开(公告)号：US20230231999A1

公开(公告)日：2023-07-20

申请号：US18186025

申请日：2023-03-17

申请人： Electronics and Telecommunications Research Institute

发明人： Gun BANG ,  Hui Yong KIM ,  Dong Gyu SIM ,  Seoung Jun OH ,  Sea Nae PARK ,  Jun Taek PARK ,  Jong Seok LEE

IPC分类号： H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

摘要： There is provided an image decoding method comprising: deriving a first prediction value of a current block by using at least one sample included in a reference block, obtaining an illumination compensation parameter on the basis of a predetermined reference region, deriving a second prediction value of the current block by applying the illumination compensation parameter to the first prediction value and reconstructing the current block on the basis of the second prediction value.

公开(公告)号：US20230179793A1

公开(公告)日：2023-06-08

申请号：US18103570

申请日：2023-01-31

申请人： Electronics and Telecommunications Research Institute

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

IPC分类号： H04N19/523 ,  H04N19/176

CPC分类号： H04N19/523 ,  H04N19/176 ,  H04N19/124

摘要： Disclosed is an image encoding method. The method includes deriving a motion refinement candidate from among motion information of spatial neighboring blocks, motion information of a temporal neighboring blocks, predefined motion information, and motion information that most frequently occurs in a reference picture, performing a motion information refinement on the derived motion refinement candidate, and generating a prediction block of a current block by using the motion refinement candidate having undergone the motion information refinement.

公开(公告)号：US20230087466A1

公开(公告)日：2023-03-23

申请号：US17994261

申请日：2022-11-25

申请人： Electronics and Telecommunications Research Institute

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

IPC分类号： H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/593

摘要： An image decoding method is disclosed in the present specification. An image decoding method according to the present invention may include: determining a position of a co-located block of a current block within a co-located picture (co-located picture); determining a representative motion vector of the current block by using motion information at the position of the co-located block; and deriving motion information on a sub-block included in the current block by using the representative motion vector.

公开(公告)号：US20230058060A1

公开(公告)日：2023-02-23

申请号：US17973835

申请日：2022-10-26

申请人： Electronics and Telecommunications Research Institute

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

IPC分类号： H04N19/583 ,  H04N19/51 ,  H04N19/105 ,  H04N19/176 ,  H04N19/96

摘要： The present invention relates to a method for encoding/decoding a video. To this end, the method for decoding a video may include: generating a merge candidate list of a current block including at least one merge candidate corresponding to each of a plurality of reference picture lists; determining at least one piece of motion information by using the merge candidate list; and generating a prediction block of the current block by using the determined at least one piece of motion information.