公开(公告)号：US20230300340A1

公开(公告)日：2023-09-21

申请号：US18303458

申请日：2023-04-19

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 ,  Dae Hyeok GWON ,  Jae Ryun CHOI

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

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: 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

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

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

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

CPC classification number: H04N19/11 ,  H04N19/176 ,  H04N19/129 ,  H04N19/186 ,  H04N19/159 ,  H04N19/12 ,  H04N19/18 ,  H04N19/61

Abstract: 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：US20230179793A1

公开(公告)日：2023-06-08

申请号：US18103570

申请日：2023-01-31

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/523 ,  H04N19/176

CPC classification number: H04N19/523 ,  H04N19/176 ,  H04N19/124

Abstract: 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

Applicant: Electronics and Telecommunications Research Institute

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

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

Abstract: 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

Applicant: Electronics and Telecommunications Research Institute

Inventor： 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: H04N19/583 ,  H04N19/51 ,  H04N19/105 ,  H04N19/176 ,  H04N19/96

Abstract: 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.

公开(公告)号：US20230041717A1

公开(公告)日：2023-02-09

申请号：US17972913

申请日：2022-10-25

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/423 ,  H04N19/96

Abstract: The present invention is about an image encoding/decoding method and apparatus. According to present invention, a method of decoding an image, the method comprising, loading information of a neighboring block of a current block; decoding a current block using the loaded information of the neighboring block; and saving information of the current block that is decoded.

公开(公告)号：US20220337845A1

公开(公告)日：2022-10-20

申请号：US17859565

申请日：2022-07-07

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

Inventor： Hui Yong KIM ,  Gwang Hoon PARK ,  Kyung Yong KIM ,  Sang Min KIM ,  Sung Chang LIM ,  Jin Ho LEE ,  Jin Soo CHOI ,  Jin Woong KIM

IPC: H04N19/159 ,  H04N19/52 ,  H04N19/436 ,  H04N19/593 ,  H04N19/503 ,  H04N19/105 ,  H04N19/117 ,  H04N19/122 ,  H04N19/124 ,  H04N19/13 ,  H04N19/15 ,  H04N19/51 ,  H04N19/61

Abstract: The present invention relates to a method and device for sharing a candidate list. A method of generating a merging candidate list for a predictive block may include: producing, on the basis of a coding block including a predictive block on which a parallel merging process is performed, at least one of a spatial merging candidate and a temporal merging candidate of the predictive block; and generating a single merging candidate list for the coding block on the basis of the produced merging candidate. Thus, it is possible to increase processing speeds for coding and decoding by performing inter-picture prediction in parallel on a plurality of predictive blocks.

公开(公告)号：US20220321915A1

公开(公告)日：2022-10-06

申请号：US17616092

申请日：2020-06-25

Applicant: Electronics and Telecommunications Research Institute ,  RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY

Inventor： Jung Won KANG ,  Ha Hyun LEE ,  Sung Chang LIM ,  Jin Ho LEE ,  Hui Yong KIM ,  Byeung Woo JEON ,  Jee Yoon PARK

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/119 ,  H04N19/91

Abstract: Disclosed herein is an image encoding/decoding method and apparatus. The image decoding method includes obtaining subblock based transform (SBT) use information, obtaining at least one of SBT division information, SBT division direction information or SBT position information, when the SBT use information indicates use of an SBT, and performing the SBT with respect to a current block based on at least one of the SBT division information, the SBT division direction information or the SBT position information. The SBT use information may be obtained when a width of the current block and a height of the current block are less than a maximum transform size.

公开(公告)号：US20220321874A1

公开(公告)日：2022-10-06

申请号：US17727526

申请日：2022-04-22

Applicant: Electronics and Telecommunications Research Institute ,  UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY

Inventor： Jung Won KANG ,  Ha Hyun LEE ,  Sung Chang LIM ,  Jin Ho LEE ,  Hui Yong KIM ,  Gwang Hoon PARK ,  Tae Hyun KIM ,  Dae Young LEE

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61

Abstract: There is provided an image encoding/decoding method and apparatus. The image encoding method of the present invention includes: generating at least one candidate block including warped reference picture (WRP) Flag information in an advanced motion vector prediction (AMVP) mode; constructing a candidate list including the at least one candidate block; and generating a prediction block of a current block based on the candidate list.

公开(公告)号：US20220264151A1

公开(公告)日：2022-08-18

申请号：US17616581

申请日：2020-06-18

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/61 ,  H04N19/593 ,  H04N19/11 ,  H04N19/91 ,  H04N19/176

Abstract: Disclosed herein is a video decoding method including: obtaining a transform skip mode flag indicating whether or not a transform skip mode is applied to a current block; based on the transform skip mode flag, when a transform skip mode is applied to the current block, determining that secondary transform/inverse transform is not applied to the current block; and, according to the transform skip mode flag, when a transform skip mode is not applied to the current block, obtaining a transform matrix index for secondary transform/inverse transform of the current block and, according to the transform matrix index, determining whether or not secondary transform/inverse transform is applied to the current block.