公开(公告)号：US20230209067A1

公开(公告)日：2023-06-29

申请号：US18115306

申请日：2023-02-28

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/117 ,  H04N19/126 ,  H04N19/13 ,  H04N19/43 ,  H04N19/50 ,  H04N19/593 ,  H04N19/61

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/117 ,  H04N19/126 ,  H04N19/13 ,  H04N19/43 ,  H04N19/50 ,  H04N19/593 ,  H04N19/61 ,  H04N19/176

Abstract: An intra prediction method according to the present invention comprises the following steps: performing a directional prediction using at least one of a neighboring pixel of a current block and a left upper corner pixel positioned at a left upper corner of the current block so as to obtain a first prediction value for the current block; obtaining a second prediction value for the current block using the reference sample positioned in the current block; and weighted summing the first prediction value and the second prediction value using a weighting matrix so as to obtain a final prediction value for the current block. According to the present invention, image encoding/decoding efficiency may be improved.

公开(公告)号：US20230049685A1

公开(公告)日：2023-02-16

申请号：US17961114

申请日：2022-10-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04N19/147 ,  H04N19/176

Abstract: An image encoding/decoding method may comprise deriving at least one merge candidate of a current block, generating an initial merge candidate list of the current block by using the derived at least one merge candidate and generating a reconfigured merge candidate list by using the initial merge candidate list.

公开(公告)号：US20230024781A1

公开(公告)日：2023-01-26

申请号：US17957862

申请日：2022-09-30

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 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61

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：US20230007290A1

公开(公告)日：2023-01-05

申请号：US17773747

申请日：2020-11-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang LIM ,  Jung Won KANG ,  Soo Woong KIM ,  Gun BANG ,  Jin Ho LEE ,  Ha Hyun LEE

IPC: H04N19/46 ,  H04N19/96 ,  H04N19/186 ,  H04N19/176

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

公开(公告)号：US20220321894A1

公开(公告)日：2022-10-06

申请号：US17612760

申请日：2020-06-18

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/159 ,  H04N19/503 ,  H04N19/176

Abstract: Disclosed herein is an image encoding/decoding method and apparatus. An image decoding method includes decoding a subblock merge mode indicator of a current block, decoding a regular merge mode indicator of the current block, if the subblock merge mode indicator does not indicate a subblock merge mode, and decoding subblock merge mode information of the current block, if the subblock merge mode indicator indicates a subblock merge mode.

公开(公告)号：US20220321885A1

公开(公告)日：2022-10-06

申请号：US17616118

申请日：2020-06-15

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18 ,  H04N19/159

Abstract: Disclosed herein is a video decoding method including determining one or more adaptation parameter sets including a quantization matrix set including a plurality of quantization matrices, determining an adaptation parameter set including a quantization matrix set applied to a current picture or a current slice from among the one or more adaptation parameter sets, dequantizing transform coefficients of a current block of a current picture or a current slice based on the quantization matrix set of the determined adaptation parameter set, and reconstructing the current block based on the dequantized transform coefficients, wherein the adaptation parameter set includes coding information applied to one or more pictures or slices.

公开(公告)号：US20220295058A1

公开(公告)日：2022-09-15

申请号：US17676698

申请日：2022-02-21

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169 ,  H04N19/82

Abstract: The present invention relates to a video encoding/decoding method and apparatus. The video decoding method according to the present invention may comprise decoding filter information on a coding unit; classifying samples in the coding unit into classes on a per block classification unit basis; and filtering the coding unit having the samples classified into the classes on a per block classification unit basis by using the filter information.

公开(公告)号：US20220272357A1

公开(公告)日：2022-08-25

申请号：US17733615

申请日：2022-04-29

Applicant: Electronics and Telecommunications Research Institute

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

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

Abstract: An image encoding/decoding method and apparatus for performing template matching-based intra prediction are provided. An image decoding method may comprise deriving a first intra-prediction mode for a current block, generating a first intra-prediction block corresponding to the first intra-prediction mode, deriving a second intra-prediction mode for the current block, generating a second intra-prediction block corresponding to the second intra-prediction mode, and generating a final intra-prediction block by using a weighted sum of the first intra-prediction block and the second intra-prediction block.

公开(公告)号：US20220232228A1

公开(公告)日：2022-07-21

申请号：US17717366

申请日：2022-04-11

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/159 ,  H04N19/513 ,  H04N19/463 ,  H04N19/105 ,  H04N19/13 ,  H04N19/126 ,  H04N19/176 ,  H04N19/593

Abstract: The present invention relates to a method for encoding/decoding a video. To this end, the method for decoding a video may include: deriving a spatial merge candidate from at least one of spatial candidate blocks of a current block, deriving a temporal merge candidate from a co-located block of the current block, and generating a prediction block of the current block based on at least one of the derived spatial merge candidate and the derived temporal merge candidate, wherein a reference picture for the temporal merge candidate is selected based on a reference picture list of a current picture including the current block and a reference picture list of a co-located picture including the co-located block.

公开(公告)号：US20220182662A1

公开(公告)日：2022-06-09

申请号：US17438333

申请日：2020-03-11

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/593 ,  H04N19/159 ,  H04N19/176 ,  H04N19/12 ,  H04N19/119 ,  H04N19/186 ,  H04N19/105 ,  H04N19/423 ,  H04N19/132 ,  H04N19/169 ,  H04N19/503

Abstract: An image encoding/decoding method and apparatus are disclosed. The image decoding method includes acquiring prediction mode information of a current block from a bitstream, deriving a prediction mode of the current block using the prediction mode information of the current block, acquiring information indicating whether a residual signal of a transform block for the current block is present based on at least one of information on partitioning of the current block or the prediction mode of the current block, and reconstructing the current block based on the information indicating whether the residual signal of the transform block is present.