Electronics and Telecommunications Research Institute

Samsung Electro-mechanics Co., Ltd.

Industry-university Cooperation Foundation Korea Aerospace University

Hanbat National University Industry-academic Cooperation Foundation

Sejong University

Seung-Hyun Cho

Hui-Yong Kim

Jin-Soo Choi

Jie-Hyun Lee

Sang-Soo Lee

Jong-Ho Kim

Se-Yoon Jeong

Woong Lim

Joo-Young Lee

Hyunsuk Ko

Youn-Hee Kim

Jin-Wuk Seok

Min Soo Kim

Minkyu Sung

Dae-Yeol Lee

Sung-Chang Lim

Joon Ki Lee

Jin-Ho Lee

Ha-Hyun Lee

Dong-San Jun

Han-Hyub Lee

Won Kyoung Lee

Seung-Il Myong

Eui-Suk Jung

Sang Rok Moon

Jae-Gon Kim

Hae-Chul Choi

Sang Soo Lee

Jie Hyun Lee

Jung-Won Kang

Eun-Gu Lee

Jong-Hoon Lee

Byoung-Whi Kim

Kyeong-Hwan Doo

Eon-Sang Kim

Je-Won Kang

Joonyoung Kim

Yung-Lyul Lee

Na-Young Kim

Hwan Seok Chung

Kwang Ok Kim

Hyeong-Ho Lee

Eui Suk Jung

Seung Il Myong

Woo-Ram Lee

Nam-Uk Kim

A-Ram Back

Jun-Woo Choi

Myung-Jun Kim

Dae-Hyeok Gwon

Jong-Hyun Lee

Seung-Kwon Beack

Seung Hwan Kim

Heuk Park

Bong-Tae Kim

Dong-Gyu Lee

Jai-sang Koh

Kyung-Jin Byun

Do-Hyeon Park

Jung-Woo Lee

Kwang-Ok Kim

Nak-Woong Eum

Seok-Hwan Ahn

Won-Cheol Bae

Soon-Jin Cho

Geon Jeong

Seong-Mo Park

Byoung-whi Kim

Seung-Chul Kim

Jong Hoon Lee

Eun Gu Lee

Chung-Woo Cho

Jea-hoon Yu

Sooyeon Kim

Hyun-Mi Kim

Manyong Park

Chulyoung Kim

Dae-Ung Kim

Byung-Yong Kang

Byoungi-whi Kim

Mahn-Yong Park

Jin-Won Choi

Byoungwhi Kim

Il-Soung Yoon

Se-Jong Oh

Hak-Jeon Bang

Jung-Kyung Lee

Dong-min Seol

Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In the encoding and decoding of a video, a prediction mode may be selected from among multiple prediction modes using prediction mode information for a target block, and prediction may be performed on the target block based on the selected prediction mode, wherein the prediction mode information includes information related to a reference block, and wherein the reference block comprises one or more of a spatially neighboring block that is spatially adjacent to the target block and a temporally neighboring block that is temporally adjacent to the target block. When the selected prediction mode includes a plurality of prediction modes, a prediction mode to be used for prediction of the target block may be decided on among the plurality of selected prediction modes through signaling of the prediction mode decision information.

Prediction method and device using reference block

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.

Waveguide module comprising a waveguide on a metal jig, where the metal jig includes a trench structure with a radio wave absorber disposed therein

Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus, and more particularly, a method and apparatus for performing filtering in video encoding and decoding. An encoding apparatus may perform filtering on a target, and may generate filtering information indicating whether filtering has been performed on the target. Further, the encoding apparatus may generate a bitstream including filtering information. A decoding apparatus may determine, based on filtering information, whether to perform filtering on a target, and may perform filtering on the target. The decoding apparatus may receive filtering information from the encoding apparatus through a bitstream or may derive filtering information using additional information.

Method and device for filtering

A method of detecting a biomolecule, a computing device performing the method, and a biomolecule detection system therefor are provided. The method includes receiving a terahertz signal that passed deionized water or reference material, receiving a terahertz signal that passed a target including a predetermined biomolecule, extracting a digital modulation characteristic for the received terahertz signal that passed the deionized water and the received terahertz signal that passed the target, and detecting the predetermined biomolecule included in the target by analyzing the extracted digital modulation characteristic, wherein the received terahertz signal that passed the deionized water and the received terahertz signal that passed the target are generated using a digitally modulated optical signal based on a transmission speed determined based on kinematics of the predetermined biomolecule.

Biomolecule detection method, computing device performing the method, and biomolecule detection system therefor

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.

Method and apparatus for compensating IQ imbalance

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.

Test device and test method for DFB-LD for RoF system

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.

RoF-based distributed antenna system

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.

Block form-based prediction method and device

Provided are an apparatus and method of generating a terahertz (THz) signal using a directly-modulated laser. An apparatus of generating a THz signal includes a first directly-modulated laser configured to output a local oscillator (LO) signal, a second directly-modulated laser configured to receive a baseband signal used as data and optically modulate the baseband signal, a band-pass filter configured to filter a spectral component of the baseband signal optically modulated and outputted through the second directly-modulated laser by using a specific frequency bandwidth, a coupler configured to couple the baseband signal filtered through the band-pass filter and the LO signal to each other, and a uni-travelling-carrier photodiode (UTC-PD) configured to generate a THz signal by beating the baseband signal and the LO signal coupled to each other.

Apparatus and method of generating terahertz signal using directly-modulated laser

Disclosed herein are a method and apparatus for compressing learning parameters for training of a deep-learning model and transmitting the compressed parameters in a distributed processing environment. Multiple electronic devices in the distributed processing system perform training of a neural network. By performing training, parameters are updated. The electronic device may share the updated parameter thereof with additional electronic devices. In order to efficiently share the parameter, the residual of the parameter is provided to the additional electronic devices. When the residual of the parameter is provided, the additional electronic devices update the parameter using the residual of the parameter.

Method and device for providing compression and transmission of training parameters in distributed processing environment

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.

Terahertz signal generation apparatus and terahertz signal generation method using the same

Disclosed is a method and apparatus for phase error compensation having tolerance to a cyclic slip. The method includes determining first phase error candidates based on symbol phases of a first block of a received signal, determining an initial estimation error according to the first phase error candidates, determining second phase error candidates based on symbol phases of a second block of the received signal, determining a final estimation error according to the initial estimation error and the second phase error candidates, and compensating for a phase of the received signal according to the final estimation error.

Method and apparatus for phase error compensation having tolerance to cyclic slip

A method and apparatus for image compression using a latent variable are provided. The multiple components of the latent variable may be sorted in order of importance. Through sorting, when the feature information of only some of the multiple components is used, the quality of a reconstructed image may be improved. In order to generate a latent variable, the components of which are sorted in order of importance, learning may be performed in various manners. Also, less important information may be eliminated from the latent variable, and processing, such as quantization, may be applied to the latent variable. Through elimination and processing, the amount of data for the latent variable may be reduced.

Method and device for compressing image and neural network using hidden variable

Growing community of inventors

Daejeon, South Korea

Seung-Hyun Cho