公开(公告)号：US20230336740A1

公开(公告)日：2023-10-19

申请号：US18317685

申请日：2023-05-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Sung Chang LIM ,  Hui Yong Kim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Jae Gon Kim ,  Sang Yong Lee ,  Hae Chul CHOI

IPC: H04N19/157 ,  H04N19/11 ,  H04N19/176 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/157 ,  H04N19/11 ,  H04N19/176 ,  H04N19/198 ,  H04N19/593 ,  H04N19/70

Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.

公开(公告)号：US20230336722A1

公开(公告)日：2023-10-19

申请号：US18311786

申请日：2023-05-03

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Chang LIM ,  Hui Yong Kim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Jae Gon Kim ,  Sang Yong Lee

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/132 ,  H04N19/157 ,  H04N19/176 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/119 ,  H04N19/105 ,  H04N19/132 ,  H04N19/157 ,  H04N19/176 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70 ,  H04N19/91 ,  H04N19/147

Abstract: The present invention relates to video encoding/decoding methods and device, wherein the video encoding method according to the invention comprises the following steps: acquiring information of peripheral blocks; setting the information about a current block based on the information of the peripheral blocks; and encoding the current block based on the set information, wherein the current block and the peripheral blocks may be a CU (coding unit).

公开(公告)号：US20230328250A1

公开(公告)日：2023-10-12

申请号：US18322742

申请日：2023-05-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  CHIPS&MEDIA, INC.

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/124 ,  H04N19/70 ,  H04N19/103

CPC classification number: H04N19/13 ,  H04N19/103 ,  H04N19/124 ,  H04N19/176 ,  H04N19/70

Abstract: According to an embodiment of the present invention, there is provided an image decoding method including: obtaining an arithmetic-coded symbol stream from an image stream; identifying a symbol segment from the symbol stream according to symbol segment information signaled from an encoding apparatus; selecting an arithmetic decoding process corresponding to the symbol segment; and collectively processing one or more symbols among multiple symbols included in the symbol segment, in association with the selected arithmetic decoding process.

公开(公告)号：US20230247194A1

公开(公告)日：2023-08-03

申请号：US18191297

申请日：2023-03-28

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

Inventor： Hui Yong KIM ,  Gwang Hoon PARK ,  Kyung Yong KIM ,  Sung Chang LIM ,  Jin Ho LEE ,  Jin Soo CHOI ,  Jin Woong KIM

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/129 ,  H04N19/186 ,  H04N19/159 ,  H04N19/12 ,  H04N19/18

CPC classification number: H04N19/11 ,  H04N19/12 ,  H04N19/18 ,  H04N19/129 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61

Abstract: The present invention relates to an encoding method and decoding method, and a device using the same. The encoding method according to the present invention comprises the steps of: specifying an intra prediction mode for a current block; and scanning a residual signal by intra prediction of the current block, wherein the step of scanning the residual signal can determine a scanning type for a luminance signal and a chroma signal of the current block according to an intra prediction mode for a luminance sample of the current block.

公开(公告)号：US20230199200A1

公开(公告)日：2023-06-22

申请号：US18108342

申请日：2023-02-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Chang LIM ,  Hui Yong KIM ,  Se Yoon JEOONG ,  Jong Ho KIM ,  Ha Hyun LEE ,  Jin Ho LEE ,  Jin Soo CHOI ,  Jin Woong KIM

IPC: H04N19/176 ,  H04N19/129 ,  H04N19/136

CPC classification number: H04N19/176 ,  H04N19/129 ,  H04N19/136

Abstract: Provided is a transform coefficient scan method including: determining a reference transform block for a decoding target block; deriving a scanning map of the decoding target block using scanning information of the reference transform block; and performing inverse scanning on a transform coefficient of the decoding target block using the derived scanning map. According to the present invention, picture encoding/decoding efficiency may be improved.

公开(公告)号：US20230188749A1

公开(公告)日：2023-06-15

申请号：US18164097

申请日：2023-02-03

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

CPC classification number: H04N19/593 ,  H04N19/44 ,  H04N19/82 ,  H04N19/105 ,  H04N19/117 ,  H04N19/136 ,  H04N19/157 ,  H04N19/176 ,  H04N19/182

Abstract: Provided is a method and apparatus for performing intra-prediction using an adaptive fitter. 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.

公开(公告)号：US20230132843A1

公开(公告)日：2023-05-04

申请号：US18087577

申请日：2022-12-22

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 ,  Wook Je JEONG ,  Hyun Gyu KIM

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/70

Abstract: An image decoding method is disclosed in the present specification. A method of decoding an image, the method may comprises determining whether to perform a context update for a first syntax element of a current block, updating, on the basis of the determination, a context for entropy decoding of the first syntax element and generating, on the basis of the updated context, a bin for the first syntax element, and wherein whether to perform the context update is determined on the basis of the number of pre-decoded predetermined syntax elements for the current block.

公开(公告)号：US20230042486A1

公开(公告)日：2023-02-09

申请号：US17972894

申请日：2022-10-25

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

Inventor： Jung Won KANG ,  Hyun Suk KO ,  Sung Chang LIM ,  Jin Ho LEE ,  Dong San JUN ,  Hui Yong KIM ,  Gwang Hoon PARK ,  Jin Soo CHOI ,  Tae Hyun KIM ,  Dae Young LEE ,  Young Su HEO

IPC: H04N19/105 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176

Abstract: A method and apparatus use a geometric modified image for video encoding/decoding. The encoding method may include: generating a geometric modified reference picture by geometrically modifying a reference picture; generating a prediction block of a current block within an encoding target picture by performing inter prediction by referencing the reference picture or the geometrically modified reference picture; and encoding inter-prediction information of the current block.

公开(公告)号：US20220408091A1

公开(公告)日：2022-12-22

申请号：US17894843

申请日：2022-08-24

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

Inventor： Jin Ho LEE ,  Jung Won KANG ,  Ha Hyun LEE ,  Sung Chang LIM ,  Hui Yong KIM ,  Jae Gon KIM ,  Do Hyeon PARK ,  Yong Uk YOON ,  Yung Lyul LEE

IPC: H04N19/13 ,  H04N19/172 ,  H04N19/184

Abstract: There is provided an video encoding/decoding method and apparatus. The video decoding method comprises acquiring a bitstream including a predetermined context element, performing at least one of a context model determination, a probability update, and a probability interval determination on the predetermined syntax element, and arithmetically decoding the predetermined syntax element on the basis of a result of the performance.

公开(公告)号：US20220345719A1

公开(公告)日：2022-10-27

申请号：US17857765

申请日：2022-07-05

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

Inventor： Hui Yong KIM ,  Gwang Hoon PARK ,  Kyung Yong KIM ,  Sung Chang LIM ,  Jin Ho LEE ,  Jin Soo CHOI ,  Jin Woong KIM

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/52 ,  H04N19/139 ,  H04N19/176 ,  H04N19/109 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/15 ,  H04N19/61

Abstract: An inter-prediction method according to the present invention comprises the steps of: deriving motion information of a current block; and generating a prediction block for the current block on the basis of the derived motion information. According to the present invention, computational complexity can be reduced and encoding efficiency can be improved.