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：US20230230284A1

公开(公告)日：2023-07-20

申请号：US18072146

申请日：2022-11-30

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUS

Inventor： Kwan Jung OH ,  Hui Yong KIM ,  Hyun Min BAN ,  Seung Mi CHOI ,  Jun Yeong CHA ,  Hyun Suk KO

IPC: G06T9/00

CPC classification number: G06T9/00

Abstract: The residual signal encoding and decoding method and apparatus based on a periodicity on phase signal are disclosed. One embodiment on a method for decoding an image, the method comprising: generating a prediction signal for a current signal, decoding an encoded residual signal from a bitstream, generating an initial reconstructed signal based on the prediction signal and the residual signal, and generating a transformed reconstructed signal by transforming a value of the initial reconstructed signal to have a size value of a preset range, wherein the generating of the transformed reconstructed signal generates the transformed reconstructed signal from the value of the initial reconstructed signal by using a clipping function with a minimum value of the preset range and a maximum value of the preset range as input values, and wherein the preset range is a period range of a signal.

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.

公开(公告)号：US20220248006A1

公开(公告)日：2022-08-04

申请号：US17616602

申请日：2020-06-17

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/117 ,  H04N19/172 ,  H04N19/174 ,  H04N19/96 ,  H04N19/186

Abstract: Disclosed herein is a video decoding method including acquiring adaptation parameter sets including an adaptive in-loop filter (ALF) set including a plurality of ALFs, determining an adaptation parameter set applied to a current picture or slice and including an ALF set applied to the current picture or slice, from among the adaptive parameter sets, determining an adaptation parameter set applied to a current coding tree block (CTB) and including an ALF set applied to the current CTB included in the current picture or slice, from the adaptation parameter set applied to the current picture or slice, and filtering the current CTB based on the ALF set of the determined adaptation parameter set applied to the current CTB, wherein the acquired adaptation parameter sets include chroma ALF number information, and wherein the ALF set includes chroma ALFs, the number of which is indicated by the chroma ALF number information.

公开(公告)号：US20220232230A1

公开(公告)日：2022-07-21

申请号：US17614935

申请日：2020-05-29

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 ,  Hui Yong KIM ,  Jae Gon KIM ,  Do Hyeon PARK ,  Ji Hoon DO ,  Yong Uk YOON

IPC: H04N19/176 ,  H04N19/18 ,  H04N19/50 ,  H04N19/119

Abstract: Disclosed herein is a video decoding method including determining a zero-out width threshold and a zero-out height threshold for distinguishing between a transform coefficient coding region and a zero-out region of a current block according to a size of the current block, determining the transform coefficient coding region and the zero-out region of the current block according to the zero-out width threshold and the zero-out height threshold, acquiring transform coefficient information of the transform coefficient coding region from a bitstream and determining a level of a transform coefficient of the transform coefficient coding region according to the transform coefficient information, determining a level of a transform coefficient of the zero-out region as 0 without acquiring transform coefficient information, and reconstructing the current block by inversely transforming the transform coefficient of the current block.