公开(公告)号：US20240137511A1

公开(公告)日：2024-04-25

申请号：US18403918

申请日：2024-01-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY ,  HANBAT NATIONAL UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jin-Ho LEE ,  Jung-Won KANG ,  Hyunsuk KO ,  Sung-Chang LIM ,  Dong-San JUN ,  Ha-Hyun LEE ,  Seung-Hyun CHO ,  Hui-Yong KIM ,  Hae-Chul CHOI ,  Dae-Hyeok GWON ,  Jae-Gon KIM ,  A-Ram BACK

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/124 ,  H04N19/593 ,  H04N19/61

CPC classification number: H04N19/119 ,  H04N19/105 ,  H04N19/124 ,  H04N19/593 ,  H04N19/61 ,  H04N19/176

Abstract: Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In video encoding and decoding, multiple partition blocks are generated by splitting a target block. A prediction mode is derived for at least a part of the multiple partition blocks, among the multiple partition blocks, and prediction is performed on the multiple partition blocks based on the derived prediction mode. When prediction is performed on the partition blocks, information related to the target block may be used, and information related to an additional partition block, which is predicted prior to the partition block, may be used.

公开(公告)号：US20230327307A1

公开(公告)日：2023-10-12

申请号：US18127075

申请日：2023-03-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sooyeon KIM ,  Seung Hwan KIM ,  Seung-Hyun CHO

IPC: H01P1/15 ,  H01P11/00 ,  H01P3/10 ,  H05K5/04

CPC classification number: H01P1/15 ,  H01P11/003 ,  H01P3/10 ,  H05K5/04

Abstract: Provided is a waveguide module for improving insertion loss and return loss. The waveguide module includes a metal jig including a waveguide through which a radio wave is transmitted and received formed therein, a chip disposed on the waveguide formed in the metal jig and including a plurality of circuits that is configured to transmit and receive radio waves inside the waveguide, and a circuit board configured to provide a bias used for an operation of the chip, wherein the metal jig includes a trench structure to dispose a radio wave absorber on a side surface of the chip in a direction crossing the waveguide.

公开(公告)号：US20230318890A1

公开(公告)日：2023-10-05

申请号：US18111275

申请日：2023-02-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Won Kyoung LEE ,  Sang Rok MOON ,  Joon Ki LEE ,  Seung-Hyun CHO

IPC: H04L27/20 ,  H04L7/00

CPC classification number: H04L27/20 ,  H04L7/0008

Abstract: A method and apparatus for compensating an in- and quadrature-(IQ) imbalance are disclosed. The method and apparatus for compensating an in- and quadrature-(IQ) imbalance provide a technique for compensating a signal distortion caused by imperfect element features and various noises on a transmission link in terahertz wireless communication and improving transmission performance.

公开(公告)号：US20230269002A1

公开(公告)日：2023-08-24

申请号：US18106640

申请日：2023-02-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sang Rok MOON ,  Eon-sang KIM ,  Minkyu SUNG ,  Seung-Hyun CHO

IPC: H04B10/516 ,  H04B10/079 ,  H04Q11/00

CPC classification number: H04B10/516 ,  H04B10/07955 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0009

Abstract: An apparatus and method for maintaining a wavelength interval of light sources are disclosed. The apparatus for maintaining a wavelength interval of light sources includes: a plurality of light sources configured to output light having different wavelengths and having a certain wavelength interval; a light reception unit configured to receive an optical signal in which at least some of the output light of each of the plurality of light sources is combined and output an electrical signal including a frequency component corresponding to the certain wavelength interval; and a controller configured to detect the frequency component corresponding to the certain wavelength interval from the electrical signal and control a wavelength of each of the plurality of light sources to maintain the certain wavelength interval based on the detected frequency component.

公开(公告)号：US20230052774A1

公开(公告)日：2023-02-16

申请号：US17782568

申请日：2020-12-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Youn-Hee KIM ,  Seung-Hyun CHO ,  Hyunsuk KO ,  Hyoung-Jin KWON ,  Dong-Hyun KIM ,  Jong-Ho KIM ,  Joo-Young LEE ,  Se-Yoon JEONG ,  Tae-Jin LEE ,  Jin-Soo CHOI

IPC: H04N19/30 ,  H04N19/119 ,  H04N19/17 ,  H04N19/147 ,  H04N19/14 ,  H04N19/42

Abstract: Disclosed herein are a video-decoding method and apparatus and a video encoding method and apparatus, and more particularly a method and an apparatus which perform region-differential image encoding/decoding using a recovered image. In accordance with an encoding method according to an embodiment, a recovered low-quality image is generated by performing encoding on an original image and a recovered high-quality image is generated using the recovered low-quality image. An image is segmented into multiple regions, and encoded reconstruction information for generating a reconstructed high-quality image is generated by performing encoding on the image.

公开(公告)号：US20220416894A1

公开(公告)日：2022-12-29

申请号：US17845190

申请日：2022-06-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung-Hyun CHO ,  Joon Ki LEE

IPC: H04B10/2575 ,  H04L7/04

Abstract: Provided is a radio over fiber (RoF)-based distributed antenna system (DAS) structure that cost-effectively provides a fifth generation (5G) mobile communication service guaranteeing a quality of service (QoS) with high bandwidth and low latency characteristics without radio shadowing in an indoor environment.

公开(公告)号：US20220416891A1

公开(公告)日：2022-12-29

申请号：US17846604

申请日：2022-06-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung-Hyun CHO ,  Joon Ki LEE

IPC: H04B10/2575 ,  H04B10/077

Abstract: A test device and method for testing a distributed feedback laser diode (DFB-LD) device for an optical transceiver of a radio over fiber (RoF) system examines the DFB-LD device based on an absolute limiting rating, an operating case environment, and a functional specification, in which the absolute limiting rating is a rating at which there is no fatal damage to the DFB-LD device during a short period of time when each limiting parameter is isolated and all other parameters are in a normal performance parameter, the operating case environment includes an operating temperature, and the functional specification includes parameters to be tested according to an operating condition for the functional specification.

公开(公告)号：US20220311591A1

公开(公告)日：2022-09-29

申请号：US17698600

申请日：2022-03-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Minkyu SUNG ,  Eon-sang KIM ,  Sang Rok MOON ,  Seung-Hyun CHO

IPC: H04L7/00

Abstract: Provided are a Kramers—Kronig (KK) reception-based terahertz (THz) signal reception apparatus and a method for compensating a frequency offset using the same. A method of compensating for a frequency offset performed by a THz signal reception apparatus includes receiving, from a THz signal transmission apparatus, a THz signal including carrier signals corresponding to three different frequency bands, extracting, from the received THz signal, a reference carrier included in the THz signal or a sampling clock generated in a process of generating a data signal, and compensating for a frequency offset generated in a process of transmitting the THz signal by using the extracted reference carrier or sampling clock.

公开(公告)号：US20220113606A1

公开(公告)日：2022-04-14

申请号：US17496684

申请日：2021-10-07

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Won Kyoung LEE ,  Heuk PARK ,  Seung-Hyun CHO

IPC: G02F1/21 ,  G02F1/225 ,  H04B10/516 ,  H04B10/114

Abstract: Disclosed are a terahertz signal generation apparatus and a terahertz signal generation method using the same. The terahertz signal generation apparatus includes first and second resonators configured to respectively output an optical signal of a first resonant frequency and an optical signal of a second resonant frequency from an optical signal input through a gain medium, an optical modulator configured to optically modulate the output optical signal of the second resonant frequency, an optical combiner configured to combine the CW optical signal of the first resonant frequency and the modulated optical signal of the second resonant frequency, and a signal generator configured to generate a terahertz signal using heterodyne beating between the CW optical signal of the first resonant frequency and the modulated optical signal of the second resonant frequency, wherein the first resonant frequency and the second resonant frequency are processed to have a predetermined frequency difference.

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.