公开(公告)号：US20240015293A1

公开(公告)日：2024-01-11

申请号：US18472473

申请日：2023-09-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04N19/12 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18

CPC classification number: H04N19/12 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18

Abstract: The present invention relates to an image encoding and decoding method. An image decoding method for the same may include: obtaining transform coefficients of a current block from a bitstream; determining a scanning unit and a scanning order of the current block; and rearranging the transform coefficients of the current block by scanning the same base on the determined scanning unit and scanning order.

公开(公告)号：US20230379477A1

公开(公告)日：2023-11-23

申请号：US18300282

申请日：2023-04-13

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 ,  H04N19/109 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/139 ,  H04N19/15 ,  H04N19/176 ,  H04N19/52 ,  H04N19/61

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/109 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/139 ,  H04N19/15 ,  H04N19/176 ,  H04N19/52 ,  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：US20230344993A1

公开(公告)日：2023-10-26

申请号：US18344160

申请日：2023-06-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/96 ,  H04N19/119

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/96

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, determining whether or not a left boundary or an upper boundary of the current block is a boundary of a predetermined image region, configuring a reference sample by using at least one reconstructed sample included in at least one reconstructed sample line adjacent to the current block based on the determination result, and performing intra-prediction for the current block based on the intra-prediction mode and the reference sample.

公开(公告)号：US20230319308A1

公开(公告)日：2023-10-05

申请号：US18330440

申请日：2023-06-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Ho LEE ,  Hui Yong KIM ,  Sung Chang LIM ,  Jin Soo CHOI ,  Jin Woong KIM

IPC: H04N19/593 ,  H04N19/117 ,  H04N19/157 ,  H04N19/182 ,  H04N19/105 ,  H04N19/159 ,  H04N19/11 ,  H04N19/122 ,  H04N19/137 ,  H04N19/82 ,  H04N19/44 ,  H04N19/136 ,  H04N19/80

CPC classification number: H04N19/593 ,  H04N19/117 ,  H04N19/157 ,  H04N19/182 ,  H04N19/105 ,  H04N19/159 ,  H04N19/11 ,  H04N19/122 ,  H04N19/137 ,  H04N19/82 ,  H04N19/44 ,  H04N19/136 ,  H04N19/80 ,  H04N19/176

Abstract: According to the present invention, an image encoding/decoding method comprises the steps of: performing an intra prediction on a current block so as to generate a prediction block; performing filtering on a filtering target pixel in the prediction block on the basis of the intra prediction mode of the current block so as to generate a final prediction block; and generating a reconstructed block on the basis of a reconstructed differential block corresponding to the current block and on the final prediction block. According to the present invention, image encoding/decoding efficiency can be improved.

公开(公告)号：US20230300362A1

公开(公告)日：2023-09-21

申请号：US18200085

申请日：2023-05-22

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hui Yong KIM ,  Jin Ho LEE ,  Sung Chang LIM ,  Jin Soo CHOI ,  Jin Woong KIM

IPC: H04N19/51 ,  H04N19/196 ,  H04N19/82 ,  H04N19/513 ,  H04N19/593 ,  H04N19/105 ,  H04N19/182 ,  H04N19/42 ,  H04N19/52

CPC classification number: H04N19/51 ,  H04N19/196 ,  H04N19/82 ,  H04N19/513 ,  H04N19/593 ,  H04N19/105 ,  H04N19/182 ,  H04N19/42 ,  H04N19/52

Abstract: An image decoding method according to the present invention includes reconstructing a residual block by inverse-quantizing and inverse-transforming an entropy-decoded residual block, generating a prediction block by performing intra prediction on a current block, and reconstructing an picture by adding the reconstructed residual block to the prediction block, wherein generating the prediction block includes generating a final prediction value of a prediction target pixel included in the current block based on a first prediction value of the prediction target pixel and a final correction value calculated by performing an arithmetic right shift on a two's complementary integer representation for an initial correction value of the prediction target pixel by a binary digit of 1. Accordingly, upon image encoding/decoding, computation complexity may be reduced.

公开(公告)号：US20230276046A1

公开(公告)日：2023-08-31

申请号：US18311990

申请日：2023-05-04

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/147 ,  H04N19/573

CPC classification number: H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/147 ,  H04N19/573

Abstract: The present invention provides a method and apparatus for encoding/decoding an image to enhance inter prediction. According to the present invention, the method includes: determining a first reference picture and a second reference picture of a current block; determining both a first reference block in the first reference picture and a second reference block in the second reference picture; partitioning the current block into a plurality of sub blocks; and obtaining a prediction block of each of the sub blocks on the basis of reference candidate block index information of each of the sub blocks.

公开(公告)号：US20230231995A1

公开(公告)日：2023-07-20

申请号：US18185899

申请日：2023-03-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/176

CPC classification number: H04N19/11 ,  H04N19/119 ,  H04N19/176

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise constructing N MPM lists for a current block, wherein N is equal to or greater than 1, deriving an intra prediction mode of the current block based on the N MPM lists, and performing intra prediction for the current block based on the intra prediction mode.

公开(公告)号：US20230209067A1

公开(公告)日：2023-06-29

申请号：US18115306

申请日：2023-02-28

Applicant: Electronics and Telecommunications Research Institute

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.

公开(公告)号：US20230049685A1

公开(公告)日：2023-02-16

申请号：US17961114

申请日：2022-10-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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.

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.