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.

公开(公告)号：US20220174286A1

公开(公告)日：2022-06-02

申请号：US17436976

申请日：2020-03-06

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/157 ,  H04N19/176

Abstract: Disclosed herein is an image encoding/decoding method and apparatus. The image decoding method according to the present invention includes obtaining symmetric motion vector difference mode availability information from a bitstream, obtaining first prediction direction's zero motion vector difference information from the bitstream, obtaining symmetric motion vector difference mode information of a current block from the bitstream on the basis of the symmetric motion vector difference mode availability information and the first prediction direction's zero motion vector difference information, obtaining first prediction direction's reference picture index information, second prediction direction's reference picture index information and a first prediction direction's motion vector difference value on the basis of the symmetric motion vector difference mode information, and generating a prediction block of the current block by using at least one of the first prediction direction's reference picture index information, the second prediction direction's reference picture index information and the first prediction direction's motion vector difference value.

公开(公告)号：US20220159271A1

公开(公告)日：2022-05-19

申请号：US17591830

申请日：2022-02-03

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/593 ,  H04N19/13 ,  H04N19/126 ,  H04N19/176 ,  H04N19/50

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, selecting at least one reconstructed sample line neighboring to the current block, constructing a reference sample using at least one reconstructed sample included in the at least one reconstructed sample line, and performing intra prediction for the current block based on the intra prediction mode and the reference sample.

公开(公告)号：US20220150499A1

公开(公告)日：2022-05-12

申请号：US17580810

申请日：2022-01-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04N19/124 ,  H04N19/196 ,  H04N19/463 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/14 ,  H04N19/33

Abstract: A method for decoding an image, the method including receiving a bitstream including image information, decoding base block size information on a size of a base block, and a residual quantization parameter of a decoding object unit, from the bitstream, deriving a predicted quantization parameter of the decoding object unit based on the base block size information, deriving a quantization parameter of the decoding object unit based on the predicted quantization parameter and the residual quantization parameter, and decoding the decoding object unit based on the quantization parameter of the decoding object unit.