公开(公告)号：US20200175668A1

公开(公告)日：2020-06-04

申请号：US16697585

申请日：2019-11-27

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Se-Yoon JEONG ,  Dae-Yeol LEE ,  Seung-Hyun CHO ,  Hyunsuk KO ,  Youn-Hee KIM ,  Jong-Ho KIM ,  Jin-Wuk SEOK ,  Joo-Young LEE ,  Woong LIM ,  Hui-Yong KIM ,  Jin-Soo CHOI

IPC: G06T7/00 ,  G06T7/13 ,  H04N17/00

Abstract: Disclosed herein are a method and apparatus for measuring video quality based on a perceptually sensitive region. The quality of video may be measured based on a perceptually sensitive region and a change in the perceptually sensitive region. The perceptually sensitive region includes a spatial perceptually sensitive region, a temporal perceptually sensitive region, and a spatio-temporal perceptually sensitive region. Perceptual weights are applied to a detected perceptually sensitive region and a change in the detected perceptually sensitive region. Distortion is calculated based on the perceptually sensitive region and the change in the perceptually sensitive region, and a result of quality measurement for a video is generated based on the calculated distortion.

公开(公告)号：US20200162736A1

公开(公告)日：2020-05-21

申请号：US16684041

申请日：2019-11-14

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin-Wuk SEOK ,  Hyunsuk KO ,  Youn-Hee KIM ,  Jong-Ho KIM ,  Joo-Young LEE ,  Woong LIM ,  Se-Yoon JEONG ,  Seung-Hyun CHO ,  Hui-Yong KIM ,  Jin-Soo CHOI

IPC: H04N19/124 ,  H04N19/18 ,  H04N19/184

Abstract: Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In image encoding, encoding using multiple quantization parameters is performed on a transform coefficient. Two quantized coefficients are generated through encoding that uses two quantization parameters. Based on the two quantized coefficients, a quantized coefficient difference is generated. Information about the quantized coefficient difference is transmitted from an encoding apparatus to a decoding apparatus through binary encoding. The information about the quantized coefficient difference may be selectively transmitted. By means of the information about the quantized coefficient difference, a high-quality video may be provided.

公开(公告)号：US20190082178A1

公开(公告)日：2019-03-14

申请号：US16084995

申请日：2017-03-30

Applicant: Electronics and Telecommunications Research Institute

Inventor： Youn-Hee KIM ,  Jin-Wuk SEOK ,  Hui-Yong KIM ,  Myung-Seok KI ,  Sung-Chang LIM ,  Jin-Soo CHOI

IPC: H04N19/119 ,  H04N19/114 ,  H04N19/174 ,  H04N19/136

Abstract: Disclosed herein are a method and apparatus for video encoding and decoding using picture partition information. Each of the pictures in a video is partitioned into tiles or slices based on picture partition information. Each picture is partitioned using one of at least two different methods based on the picture partition information. The picture partition information may indicate two or more picture partitioning methods. The picture partitioning methods may be changed either periodically or according to a specific rule. The picture partition information may describe such a periodic change or the specified rule.