公开(公告)号：US20220124310A1

公开(公告)日：2022-04-21

申请号：US17432822

申请日：2020-02-21

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 ,  H04N19/137 ,  H04N19/176 ,  H04N19/119

Abstract: Disclosed herein is an image encoding/decoding method. The method of decoding the image includes structuring a motion information candidate list of a current block, selecting a first motion information candidate used for prediction of a first subblock in the current block from the motion information candidate list, selecting a second motion information candidate used for prediction of a second subblock in the current block from the motion information candidate list, generating a prediction sample of the first subblock by performing inter prediction with respect to the first subblock based on the first motion information candidate, and generating a prediction sample of the second subblock by performing inter prediction with the second subblock based on the second motion information candidate. The first motion information candidate is any one of candidates in a first prediction direction in the motion information candidate list, and the second motion information candidate is any one of candidates in a second prediction direction in the motion information candidate list.

公开(公告)号：US20220086426A1

公开(公告)日：2022-03-17

申请号：US17418514

申请日：2019-12-27

Applicant: Electronics and Telecommunications Research Institute

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

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

Abstract: Disclosed herein is a method of decoding an image including deriving intra prediction mode of a current block using an intra prediction mode of a neighbor block adjacent to the current block, constructing a reference sample of the current block, and performing intra prediction with respect to the current block using the intra prediction mode of the current block and the reference sample. The deriving of the intra prediction mode of the current block includes constructing a most probable mode (MPM) list based on whether the intra prediction mode of the current block is a Planar mode.

公开(公告)号：US20220060744A1

公开(公告)日：2022-02-24

申请号：US17415568

申请日：2019-12-20

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/159 ,  H04N19/105

Abstract: Disclosed herein is a method of decoding an image including determining whether a current block is in a bi-directional optical flow (BIO) mode, calculating gradient information of prediction samples of the current block when the current block is in the BIO mode, and generating a prediction block of the current block using the calculated gradient information, wherein the calculating of the gradient information of the prediction samples of the current block includes calculating the gradient information using at least one neighbor sample adjacent to the prediction samples.

公开(公告)号：US20220038692A1

公开(公告)日：2022-02-03

申请号：US17502647

申请日：2021-10-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

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

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise constructing N MPM lists for a current block, wherein N is equal to or greater than 1, deriving an intra prediction mode of the current block based on the N MPM lists, and performing intra prediction for the current block based on the intra prediction mode.

公开(公告)号：US20220030226A1

公开(公告)日：2022-01-27

申请号：US17277597

申请日：2019-09-18

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/593 ,  H04N19/176 ,  H04N19/117

Abstract: An image encoding/decoding method is disclosed. An image decoding method of the present invention may comprise deriving an intra-prediction mode of a current block by using an intra-prediction mode of a neighbor block adjacent to the current block, configuring a reference sample of the current block, and performing intra-prediction on the current block by using the intra-prediction mode and the reference sample, wherein when the intra-prediction mode of the neighbor block is unavailable, the intra-prediction mode of the neighbor block may be replaced with a planar mode.

公开(公告)号：US20220007022A1

公开(公告)日：2022-01-06

申请号：US17282720

申请日：2019-10-04

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: H04N19/12 ,  H04N19/61 ,  H04N19/46 ,  H04N19/176

Abstract: The present specification discloses a method of decoding an image. The method of decoding an image according to the method includes: obtaining transform skip information of a current block from a bitstream; obtaining multiple transform selection information of the current block on the basis of the transform skip information from the bitstream; and performing inverse transform on the current block on the basis of the multiple transform selection information, wherein the multiple transform selection information is used to set each of a horizontal transform type and a vertical transform type.

公开(公告)号：US20210274217A1

公开(公告)日：2021-09-02

申请号：US17256586

申请日：2019-06-28

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 ,  Dong Jin PARK ,  Myoung Hun JANG ,  Wook Je JEONG

IPC: H04N19/57 ,  H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/119

Abstract: There is provided an image encoding/decoding method and apparatus. The image decoding method comprises decoding information on whether or not to perform motion information refinement from a bitstream, obtaining second motion information for first motion information on a current block on the basis of the information and reconstructing at least one of the current block and a neighboring block of the current block by using at least one of the first motion information and the second motion information.

公开(公告)号：US20210274176A1

公开(公告)日：2021-09-02

申请号：US17277467

申请日：2019-09-18

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/119 ,  H04N19/174 ,  H04N19/172

Abstract: An image encoding/decoding method is disclosed. An image decoding method of the present invention may comprise deriving slice mode information on a slice included in a current picture, deriving slice identification information on the basis of the slice mode information, and decoding the slice on the basis of the slice identification information.

公开(公告)号：US20210195227A1

公开(公告)日：2021-06-24

申请号：US17043575

申请日：2019-03-28

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/513 ,  H04N19/56 ,  H04N19/91

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, deriving an initial motion vector of a current block; deriving a refined motion vector by using the initial motion vector; and generating a prediction block of the current block by using the refined motion vector.

公开(公告)号：US20210176494A1

公开(公告)日：2021-06-10

申请号：US17172565

申请日：2021-02-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Ho LEE ,  Hui Yong KIM ,  Se Yoon JEONG ,  Suk Hee CHO ,  Ha Hyun LEE ,  Jong Ho KIM ,  Sung Chang LIM ,  Jin Soo CHOI ,  Jin Woong KIM ,  Chie Teuk AHN

IPC: H04N19/593 ,  H04N19/117 ,  H04N19/157 ,  H04N19/176 ,  H04N19/82 ,  H04N19/136 ,  H04N19/44 ,  H04N19/105

Abstract: Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction includes the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter.