公开(公告)号：US11205257B2

公开(公告)日：2021-12-21

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: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  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：US10827173B2

公开(公告)日：2020-11-03

申请号：US16188587

申请日：2018-11-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Woong Lim ,  Seung-Hyun Cho ,  Joo-Young Lee ,  Youn-Hee Kim ,  Jin-Wuk Seok ,  Jong-Ho Kim ,  Dae-Yeol Lee ,  Se-Yoon Jeong ,  Hui-Yong Kim ,  Jin-Soo Choi

IPC: H04N19/124 ,  H04N19/70

Abstract: Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In quantization and dequantization, multiple quantization methods and multiple dequantization methods may be used. The multiple quantization methods include a variable-rate step quantization method and a fixed-rate step quantization method. The variable-rate step quantization method may be a quantization method in which an increment in a quantization step depending on an increase in a value of a quantization parameter by 1 is not fixed. The fixed-rate step quantization method may be a quantization method in which the increment in the quantization step depending on the increase of the value of the quantization parameter by 1 is fixed.