公开(公告)号：US12075075B2

公开(公告)日：2024-08-27

申请号：US17419188

申请日：2019-12-27

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: H04N19/44 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/44 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: Disclosed herein is a method of decoding an image. The method includes acquiring intra chroma prediction information of a current block from a bitstream, deriving an intra chroma prediction mode of the current block based on the intra chroma prediction information, and performing intra prediction with respect to the current block based on the intra chroma prediction mode. The intra chroma prediction mode may be any one of a linear model (LM)) mode, a derived luma (DM) mode, a Planar mode, a Vertical mode, a Horizontal mode and a DC mode, and a first bit of the intra chroma prediction information may be used to determine whether the intra chroma prediction mode is an LM mode.

公开(公告)号：US12075028B2

公开(公告)日：2024-08-27

申请号：US17761908

申请日：2020-09-21

Applicant: Electronics and Telecommunications Research Institute ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY

Inventor： Jin Ho Lee ,  Jung Won Kang ,  Ha Hyun Lee ,  Sung Chang Lim ,  Jae Gon Kim ,  Ji Hoon Do ,  Do Hyeon Park ,  Yong Uk Yoon

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are disclosed. The method of decoding an image according to the present invention, comprises, generating a first prediction block of a current block, generating a second prediction block of the current block and generating a final prediction sample of the current block using a sample unit weighted sum of the first prediction block and the second prediction block, wherein a weight used for the sample unit weighted sum is determined based on a location of a current luma sample and a geometric prediction mode (GPM) boundary line for partitioning the current block.

公开(公告)号：US12058368B2

公开(公告)日：2024-08-06

申请号：US17613395

申请日：2020-06-17

Applicant: Electronics and Telecommunications Research Institute

Inventor： Ha Hyun Lee ,  Jung Won Kang ,  Sung Chang Lim ,  Jin Ho Lee ,  Hui Yong Kim

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513

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, decoding an intra block copy prediction mode of the current block using the prediction mode information of the current block, and reconstructing the current block based on the intra block copy prediction mode. The intra block copy prediction mode is at least one of a block copy based SKIP mode, a block copy based MERGE mode or a block copy based AMVP mode.

公开(公告)号：US12034919B2

公开(公告)日：2024-07-09

申请号：US17988972

申请日：2022-11-17

Applicant: Electronics and Telecommunications Research Institute ,  Industry-University Cooperation Foundation Korea Aerospace University ,  Hanbat National University Industry-Academic Cooperation Foundation

Inventor： Jin Ho Lee ,  Sung Chang Lim ,  Jung Won Kang ,  Hyun Suk Ko ,  Ha Hyun Lee ,  Dong San Jun ,  Seung Hyun Cho ,  Hui Yong Kim ,  Jae Gon Kim ,  Do Hyeon Park ,  Jin Soo Choi ,  Hae Chul Choi

IPC: H04N19/11 ,  G06F17/18 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119 ,  H04N19/13 ,  H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/513 ,  H04N19/80 ,  H04N19/91

CPC classification number: H04N19/11 ,  G06F17/18 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119 ,  H04N19/13 ,  H04N19/132 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/513 ,  H04N19/80 ,  H04N19/91

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus according to the present invention may comprise deriving an intra-prediction mode of a current block, and performing intra-prediction for the current block based on the intra-prediction mode. The deriving of the intra-prediction mode may comprise decoding a predetermined mode sameness indicator.

公开(公告)号：US12003753B2

公开(公告)日：2024-06-04

申请号：US16830236

申请日：2020-03-25

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang Lim ,  Hui Yong Kim ,  Se Yoon Jeong ,  Suk Hee Cho ,  Dong San Jun ,  Jong Ho Kim ,  Ha Hyun Lee ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/513 ,  H04N19/426 ,  H04N19/44 ,  H04N19/61

CPC classification number: H04N19/513 ,  H04N19/426 ,  H04N19/44 ,  H04N19/61

Abstract: The present invention relates to image processing, and more particularly, to a video coding/decoding method using a clipped motion vector and an apparatus thereof. An embodiment of the present invention relates to a method of decoding an image. The method includes clipping a motion vector of a reference picture in a predetermined dynamic range to generate a clipped motion vector, storing the clipped motion vector in a buffer, deriving a motion vector of a coding treeblock using the motion vector stored in the buffer, and performing inter prediction decoding process using the motion vector of the coding treeblock. According to the exemplary embodiment of the present invention, a size of a memory required for storing motion vectors may be reduced.

公开(公告)号：US12003707B2

公开(公告)日：2024-06-04

申请号：US17965667

申请日：2022-10-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Ha Hyun Lee ,  Hui Yong Kim ,  Sung Chang Lim ,  Jong Ho Kim ,  Jin Ho Lee ,  Se Yoon Jeong ,  Suk Hee Cho ,  Jin Soo Choi ,  Jin Woong Kim ,  Chie Teuk Ahn

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/107 ,  H04N19/109 ,  H04N19/11 ,  H04N19/13 ,  H04N19/137 ,  H04N19/157 ,  H04N19/159 ,  H04N19/169 ,  H04N19/176 ,  H04N19/196 ,  H04N19/50 ,  H04N19/513 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/107 ,  H04N19/105 ,  H04N19/109 ,  H04N19/11 ,  H04N19/13 ,  H04N19/137 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/1887 ,  H04N19/196 ,  H04N19/50 ,  H04N19/52 ,  H04N19/521 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/91

Abstract: Disclosed herein is an intra prediction method including: deriving neighbor prediction mode information from a left neighbor prediction mode and an upper neighbor prediction mode; deriving an intra prediction mode for a decoding target unit by using the derived neighbor prediction mode information; and performing intra prediction on the decoding target unit based on the intra prediction mode. According to exemplary embodiments of the present invention, image encoding/decoding efficiency can be improved.

公开(公告)号：US11856221B2

公开(公告)日：2023-12-26

申请号：US17878630

申请日：2022-08-01

Applicant: Electronics and Telecommunications Research Institute ,  CHIPS & MEDIA, INC

Inventor： Ha Hyun Lee ,  Jung Won Kang ,  Sung Chang Lim ,  Jin Ho Lee ,  Hui Yong Kim ,  Dae Yeon Kim ,  Dong Jin Park

IPC: H04N19/55 ,  H04N19/182 ,  H04N19/563

CPC classification number: H04N19/55 ,  H04N19/182 ,  H04N19/563

Abstract: Disclosed is a method of decoding an image and a method of encoding an image. The method of decoding an image includes: obtaining motion-constrained tile set information; determining, on the basis of the motion-constrained tile set information, a first boundary region of a collocated tile set within a reference picture, which corresponds to a motion-constrained tile set; padding a second boundary region corresponding to the first boundary region; and performing inter prediction on the motion-constrained tile set by using a collocated tile set that includes the padded second boundary region.

公开(公告)号：US11849110B2

公开(公告)日：2023-12-19

申请号：US17711477

申请日：2022-04-01

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

Inventor： Sung Chang Lim ,  Ha Hyun Lee ,  Se Yoon Jeong ,  Hui Yong Kim ,  Suk Hee Cho ,  Jong Ho Kim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Chie Teuk Ahn ,  Dong Gyu Sim ,  Seoung Jun Oh ,  Gwang Hoon Park ,  Sea Nae Park ,  Chan Woong Jeon

IPC: H04N19/117 ,  H04N19/46 ,  H04N19/593 ,  H04N19/132 ,  H04N19/176 ,  H04N19/17 ,  H04N19/50 ,  H04N19/109 ,  H04N19/159 ,  H04N19/174 ,  H04N19/192 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/109 ,  H04N19/132 ,  H04N19/159 ,  H04N19/17 ,  H04N19/174 ,  H04N19/176 ,  H04N19/192 ,  H04N19/46 ,  H04N19/50 ,  H04N19/593 ,  H04N19/82

Abstract: The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.

公开(公告)号：US11838514B2

公开(公告)日：2023-12-05

申请号：US17266540

申请日：2019-08-06

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 ,  H04N19/176 ,  H04N19/169 ,  H04N19/137

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/176 ,  H04N19/1883

Abstract: The present invention discloses an image decoding method, the method including generating a candidate list including motion information derived from a spatial neighboring block and a temporal neighboring block adjacent to a current block; deriving motion information of the current block using the candidate list; generating a prediction block of the current block using the derived motion information; and updating the derived motion information in a motion information list, wherein the generating of the candidate list is performed in such a manner as to include at least one information of the motion information included in the updated motion information list in a block decoded before the current block.

公开(公告)号：US11838502B2

公开(公告)日：2023-12-05

申请号：US17885349

申请日：2022-08-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  CHIPS & MEDIA, INC ,  INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY

Inventor： Jin Ho Lee ,  Jung Won Kang ,  Ha Hyun Lee ,  Sung Chang Lim ,  Hui Yong Kim ,  Dae Yeon Kim ,  Yung Lyul Lee

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/593

CPC classification number: H04N19/11 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/593

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise acquiring transform coefficients distribution information of a neighboring block from a bitstream; direction-adaptively determining an intra prediction mode of a current block to be decoded, according to the transform coefficients distribution information of the neighboring block; and reconstructing the current block, based on the determined intra prediction mode, wherein the direction-adaptively determining includes determining similarity flag information corresponding to the neighboring block, based on the transform coefficients distribution information of the neighboring block.