公开(公告)号：US11627325B2

公开(公告)日：2023-04-11

申请号：US17720646

申请日：2022-04-14

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 ,  H04N19/176 ,  H04N19/182

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：US11503282B2

公开(公告)日：2022-11-15

申请号：US17163218

申请日：2021-01-29

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: H04N19/61 ,  H04N19/159 ,  H04N19/107 ,  H04N19/70 ,  H04N19/593 ,  H04N19/176 ,  H04N19/196 ,  H04N19/13 ,  H04N19/157 ,  H04N19/169 ,  H04N19/11 ,  H04N19/50 ,  H04N19/137 ,  H04N19/513 ,  H04N19/105 ,  H04N19/109 ,  H04N19/52 ,  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：US11277622B2

公开(公告)日：2022-03-15

申请号：US16820814

申请日：2020-03-17

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

Inventor： Hae Chul Choi ,  Se Yoon Jeong ,  Sung-Chang Lim ,  Jin Soo Choi ,  Jin Woo Hong ,  Dong Gyu Sim ,  Seoung-Jun Oh ,  Chang-Beom Ahn ,  Gwang Hoon Park ,  Seung Ryong Kook ,  Sea-Nae Park ,  Kwang-Su Jeong

IPC: G06K9/00 ,  H04N19/159 ,  H04N19/132 ,  H04N19/587 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/11 ,  H04N19/124 ,  H04N19/44 ,  H04N19/50 ,  H04N19/625 ,  H04N19/91 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/51 ,  H04N19/615 ,  H04N19/105 ,  H04N19/117 ,  H04N19/43 ,  H04N19/172

Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.

公开(公告)号：US11252424B2

公开(公告)日：2022-02-15

申请号：US16535991

申请日：2019-08-08

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/44 ,  H04N19/52 ,  H04N19/503 ,  H04N19/50 ,  H04N19/597

Abstract: An inter prediction method according to the present invention comprises the steps of: selecting candidate units from among reconstructed neighbor units; creating a candidate unit set with respect to units to be decoded, using the selected candidate units; determining a reference unit from among the candidate units which constitute the created candidate unit set; and performing inter prediction on the units to be decoded, using the determined reference unit. According to the present invention, image encoding/decoding efficiency can be improved.

公开(公告)号：US11102471B2

公开(公告)日：2021-08-24

申请号：US15897440

申请日：2018-02-15

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

Inventor： Se Yoon Jeong ,  Hui Yong Kim ,  Sung Chang Lim ,  Jin Ho Lee ,  Ha Hyun Lee ,  Jong Ho Kim ,  Jin Soo Choi ,  Jin Woong Kim ,  Chie Teuk Ahn ,  Gwang Hoon Park ,  Kyung Yong Kim ,  Han Soo Lee ,  Tae Ryong Kim

IPC: H04N19/10 ,  H04N19/105 ,  H04N19/136 ,  H04N19/196 ,  H04N19/61 ,  H04N19/46

Abstract: According to one embodiment of the present invention, a video information encoding method comprises: a step of predicting information of the current coding unit to generate prediction information; and a step of determining whether the information of the current coding unit coincides with the prediction information. If the information of the current coding unit coincides with the prediction information, a flag indicating that the information of the current coding unit coincides with the prediction information is encoded and transmitted. If the information of the current coding unit does not coincide with the prediction information, a flag indicating that the information of the current coding unit does not coincide with the prediction information is encoded and transmitted and the information of the current coding unit is encoded and transmitted. In the step of generating prediction information, the prediction information may be generated using the information on the coding unit adjacent to the current coding unit.

公开(公告)号：US10958933B2

公开(公告)日：2021-03-23

申请号：US16598846

申请日：2019-10-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hae-Chul Choi ,  Se Yoon Jeong ,  Sukhee Cho ,  Hui Yong Kim ,  Jinho Lee ,  Hahyun Lee ,  Sung-Chang Lim ,  Jongho Kim ,  Jin Soo Choi ,  Jin Woo Hong ,  Jin Woong Kim

IPC: H04N19/52 ,  H04N19/513 ,  H04N19/172 ,  H04N19/176

Abstract: Provided is an image encoding/decoding apparatus and method. The image encoding apparatus may include a motion vector prediction unit to perform a prediction with respect to an arbitrary motion vector of a current block within an image, using at least one of vector information of a motion vector corresponding to an adjacent block and vector information of a previous motion vector of the current block, and a differential determination unit to determine differential information of a motion vector of the current block based on the motion vector predicted in the motion vector prediction unit and an actual motion vector of the current block.

公开(公告)号：US10951917B2

公开(公告)日：2021-03-16

申请号：US16725624

申请日：2019-12-23

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: H04N19/157 ,  H04N19/82 ,  H04N19/105 ,  H04N19/593 ,  H04N19/117 ,  H04N19/176 ,  H04N19/136 ,  H04N19/44 ,  H04N19/182 ,  H04N19/147

Abstract: Provided is a method and apparatus for performing intra-prediction using an adaptive filter. 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：US10939106B2

公开(公告)日：2021-03-02

申请号：US16235878

申请日：2018-12-28

Applicant: Electronics and Telecommunications Research Institute

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

IPC: H04N19/00 ,  H04N19/124 ,  H04N19/196 ,  H04N19/463 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/14 ,  H04N19/33

Abstract: The present invention relates to a video encoding method and apparatus for setting and encoding quantization parameters, and to a video decoding method and apparatus for decoding and setting quantization parameters in a video encoding and decoding apparatus which uses blocks having various sizes and depths as encoding and decoding units.

公开(公告)号：US10917647B2

公开(公告)日：2021-02-09

申请号：US16388429

申请日：2019-04-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION ,  UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY

Inventor： Hae Chul Choi ,  Se Yoon Jeong ,  Sung-Chang Lim ,  Jin Soo Choi ,  Jin Woo Hong ,  Dong Gyu Sim ,  Seoung-Jun Oh ,  Chang-Beom Ahn ,  Gwang Hoon Park ,  Seung Ryong Kook ,  Sea-Nae Park ,  Kwang-Su Jeong

IPC: G06K9/36 ,  H04N19/159 ,  H04N19/132 ,  H04N19/587 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/11 ,  H04N19/124 ,  H04N19/44 ,  H04N19/50 ,  H04N19/625 ,  H04N19/91 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/51 ,  H04N19/615 ,  H04N19/105 ,  H04N19/117 ,  H04N19/43 ,  H04N19/172

Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.

公开(公告)号：US10742996B2

公开(公告)日：2020-08-11

申请号：US16388382

申请日：2019-04-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION ,  UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY

Inventor： Hae Chul Choi ,  Se Yoon Jeong ,  Sung-Chang Lim ,  Jin Soo Choi ,  Jin Woo Hong ,  Dong Gyu Sim ,  Seoung-Jun Oh ,  Chang-Beom Ahn ,  Gwang Hoon Park ,  Seung Ryong Kook ,  Sea-Nae Park ,  Kwang-Su Jeong

IPC: G06K9/00 ,  H04N19/159 ,  H04N19/132 ,  H04N19/587 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/11 ,  H04N19/124 ,  H04N19/44 ,  H04N19/50 ,  H04N19/625 ,  H04N19/91 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/51 ,  H04N19/615 ,  H04N19/105 ,  H04N19/117 ,  H04N19/43 ,  H04N19/172

Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.