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.

公开(公告)号：US10257528B2

公开(公告)日：2019-04-09

申请号：US15287345

申请日：2016-10-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Se-Yoon Jeong ,  Hui-Yong Kim ,  Jong-Ho Kim ,  Sung-Chang Lim ,  Shanglin Yang ,  C.-C. Jay Kuo ,  Qin Huang

IPC: H04N19/31 ,  H04N19/154 ,  H04N19/136 ,  H04N19/172 ,  H04N19/132

Abstract: Disclosed herein are a method and apparatus that adaptively perform encoding and decoding based on image quality. An encoding apparatus may determine optimal Frames Per Second (FPS) for a video and may encode the video based on the determined FPS. Further, the encoding apparatus may provide improved temporal scalability. A decoding apparatus may select a frame to be displayed from among frames of a video depending on a required minimum satisfied user ratio. Through the selection of the frame, the decoding apparatus may provide improved temporal scalability.

公开(公告)号：US20140037000A1

公开(公告)日：2014-02-06

申请号：US13975251

申请日：2013-08-23

Applicant: Electronics and Telecommunications Research Institute ,  Industry-Academia Cooperation Group of Sejong University ,  Kwangwoon University Research Institute for Industry Cooperation

Inventor： Se-Yoon Jeong ,  Hae-Chul Choi ,  Jeong-Il Seo ,  Seung-Kwon Beack ,  In-Seon Jang ,  Jae-Gon Kim ,  Kyung-Ae Moon ,  Dae-Young Jang ,  Jin-Woo Hong ,  Jin-Woong Kim ,  Yung-Lyul Lee ,  Dong-Gyu Sim ,  Seoung-Jun Oh ,  Chang-Beom Ahn ,  Dae-Yeon Kim ,  Dong-Kyun Kim

IPC: H04N7/26

CPC classification number: H04N19/159 ,  H04N19/103 ,  H04N19/11 ,  H04N19/129 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/61 ,  H04N19/91

Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.

Abstract translation: 本发明公开了一种使用离散余弦变换（DCT）扫描的编码装置，其包括用于选择用于帧内预测的最佳模式的模式选择装置; 帧内预测装置，用于根据在模式选择装置中选择的模式对输入的视频执行帧内预测; DCT和量化装置，用于对从帧内预测装置输出的块的残余系数进行DCT和量化; 以及熵编码装置，用于通过使用基于残差系数的像素相似度确定的扫描模式，对从DCT获取的DCT系数和量化执行熵编码。