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公开(公告)号：US20230209067A1
公开(公告)日：2023-06-29
申请号：US18115306
申请日：2023-02-28
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.
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432.发明申请公开(公告)号：US20230049685A1
公开(公告)日：2023-02-16
申请号：US17961114
申请日：2022-10-06
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.
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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.
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公开(公告)号：US20230007290A1
公开(公告)日：2023-01-05
申请号：US17773747
申请日：2020-11-26
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.
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公开(公告)号：US20220417551A1
公开(公告)日：2022-12-29
申请号：US17903494
申请日：2022-09-06
Inventor： Sung Chang LIM , Hui Yong KIM , Jin Ho LEE , Jin Soo CHOI , Jin Woong KIM
IPC: H04N19/52
Abstract: A method for decoding an image according to the present invention comprises the steps of: decoding a residual block by quantizing and inverse transforming an entropy-decoded residual block; generating a prediction block via motion compensation; and decoding an image by adding the decoded residual block to the prediction block, wherein on the basis of the maximum number of motion vector candidates of the motion vector candidate list related to the prediction block, a motion vector candidate list is adjusted by adding a particular motion vector candidate or by discarding a portion from among the motion vector candidates, and in the prediction block generation step, a prediction motion vector of the prediction block is determined on the basis of the adjusted motion vector candidate list. Accordingly, the complexity of arithmetic operations is reduced during encoding/decoding of an image.
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Patent Agency Ranking
公开(公告)号：US20220385887A1
公开(公告)日：2022-12-01
申请号：US17886154
申请日：2022-08-11
Inventor： Dong San JUN , Jung Won KANG , Sung Chang LIM , Hyun Suk KO , Jin Ho LEE , Hui Yong KIM , Jin Soo CHOI
IPC: H04N19/103 , H04N19/11 , H04N19/463 , H04N19/176 , H04N19/146 , H04N19/44 , H04N19/167 , H04N19/159 , H04N19/91
Abstract: Provided are method and apparatus methods and apparatuses for encoding an intra-prediction mode based on a secondary IPM. The present invention may comprises a first decision step of determining whether an intra-prediction mode of a current block is included in a first candidate mode set including M candidate modes (M is an integer equal to or greater than 1); a second decision step of determining whether the intra-prediction mode of the current block is included in a second candidate mode set including N candidate modes (N is an integer equal to or greater than 1) based on a first determination result representing a determination result of the first decision step; and an intra prediction mode encoding step of encoding the intra-prediction mode of the current block based on the first determination result or a second determination result representing a determination result of the second decision step.
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公开(公告)号：US20220321894A1
公开(公告)日：2022-10-06
申请号：US17612760
申请日：2020-06-18
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.
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438.发明申请公开(公告)号：US20220321885A1
公开(公告)日：2022-10-06
申请号：US17616118
申请日：2020-06-15
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.
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公开(公告)号：US20220295065A1
公开(公告)日：2022-09-15
申请号：US17828688
申请日：2022-05-31
Applicant: Electronics and Telecommunications Research Institute , UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
Inventor： Hui Yong KIM , Sung Chang LIM , Jin Ho LEE , Jin Soo CHOI , Jin Woong KIM , Gwang Hoon PARK , Kyung Yong KIM
IPC: H04N19/129 , H04N19/176 , H04N19/70 , H04N19/122 , H04N19/159 , H04N19/119 , H04N19/136 , H04N19/61 , H04N19/593 , H04N19/625 , H04N19/124 , H04N19/157 , H04N19/44
Abstract: A method and a device for encoding/decoding images are disclosed. The method for encoding images comprises the steps of: deriving a scan type of a residual signal for a current block according to whether or not the current block is a transform skip block; and applying the scan type to the residual signal for the current block, wherein the transform skip block is a block to which transform for the current block is not applied and is specified on the basis of information indicating whether or not transform for the current block is to be applied.
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公开(公告)号：US20220295058A1
公开(公告)日：2022-09-15
申请号：US17676698
申请日：2022-02-21
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.
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