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公开(公告)号：US20240236319A9
公开(公告)日：2024-07-11
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.
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12.发明公开公开(公告)号：US20240178915A1
公开(公告)日：2024-05-30
申请号：US18491215
申请日：2023-10-20
Inventor： Seung-Hyun CHO , Joon Ki LEE
IPC: H04B10/112 , H04B10/516
CPC classification number: H04B10/112 , H04B10/516
Abstract: A communication device combining a communication function and a positioning function and an operation method thereof are provided. The communication device includes a photonics-based sub-terahertz (sub-THz) transmission unit configured to transmit a terahertz (THz) signal generated by beating two optical signals having different wavelengths and a positioning unit configured to determine a position of a target using the THz signal transmitted by the photonics-based sub-THz transmission unit and received by the positioning unit by being reflected by the target, wherein the photonics-based sub-THz transmission unit is configured to adjust a transmission direction of the THz signal based on the position of the target determined by the positioning unit.
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公开(公告)号：US20230032574A1
公开(公告)日：2023-02-02
申请号：US17965160
申请日：2022-10-13
Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , INDUSTRY-ACADEMIA COOPERATION GROUP OF SEJONG UNIVERSITY
Inventor： Sung-Chang LIM , Jung-Won KANG , Hyunsuk KO , Jin-Ho LEE , Ha-Hyun LEE , Dong-San JUN , Seung-Hyun CHO , Hui-Yong KIM , Yung-Lyul LEE , Jun-Woo CHOI , Jin-Soo CHOI , Nam-Uk KIM , Myung-Jun KIM
IPC: H04N19/117 , H04N19/132 , H04N19/44 , H04N19/80 , H04N19/70 , H04N19/513 , H04N19/19 , H04N19/122 , H04N19/176
Abstract: 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.
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公开(公告)号：US20220277491A1
公开(公告)日：2022-09-01
申请号：US17615519
申请日：2020-05-29
Inventor： Joo-Young LEE , Seung-Hyun CHO , Hyunsuk KO , Hyoung-Jin KWON , Youn-Hee KIM , Jong-Ho KIM , Se-Yoon JEONG , Hui-Yong KIM , Jin-Soo CHOI
Abstract: Disclosed herein are a method and apparatus for image compression based on machine learning using a global context. The disclosed image compression network employs an existing image quality enhancement network for an end-to-end joint learning scheme. The image compression network may jointly optimize image compression enhancement and quality enhancement. The image compression networks and image quality enhancement networks may be easily combined within a unified architecture which minimizes total loss, and may be easily jointly optimized.
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公开(公告)号：US20220021455A1
公开(公告)日：2022-01-20
申请号：US17374466
申请日：2021-07-13
Inventor： Joonyoung KIM , Eon-sang KIM , Minkyu SUNG , Jong Hyun LEE , Seung-Hyun CHO
IPC: H04B10/2575 , H04B10/50
Abstract: Disclosed is a radio-frequency-over-fiber (RFoF) transmission method using a directly modulated laser (DML). The RFoF transmission method to be performed by a head end includes combining a radio frequency (RF) carrier signal and a data signal having a lower frequency band than the RF carrier signal through an RF coupler, modulating the combined RF carrier signal and the combined data signal using a frequency response characteristic of a DML, and outputting an optical signal in which, of RF carrier signals and data signals being generated in a laterally symmetrical form based on an optical carrier frequency through the modulating, an RF carrier signal is suppressed.
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Patent Agency Ranking
公开(公告)号：US20190149823A1
公开(公告)日：2019-05-16
申请号：US16188587
申请日：2018-11-13
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
CPC classification number: 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.
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17.发明申请公开(公告)号：US20180152244A1
公开(公告)日：2018-05-31
申请号：US15823823
申请日：2017-11-28
Inventor： Seung-Hyun CHO , Hwan Seok CHUNG , Minkyu SUNG , Jong Hyun LEE
IPC: H04B10/2575 , H04J14/02
CPC classification number: H04B10/25753 , H04B1/38 , H04B2210/006 , H04J14/02
Abstract: A host unit is provided between a remote radio head and a radio unit. The host unit performs a conversion between a digital optical signal used by the remote radio head and an analog optical signal used by the radio unit. A frequency of the analog optical signal converted by the host unit may be an intermediate frequency. The radio unit performs a conversion between an analog optical signal used by the host unit and an analog radio signal used by a user terminal. A frequency of the analog radio signal may be included in a millimeter wave band or radio frequency band.
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18.发明申请公开(公告)号：US20140199074A1
公开(公告)日：2014-07-17
申请号：US14050465
申请日：2013-10-10
Inventor： Seung-Hyun CHO , Seung-Il MYONG , Kyeong-Hwan DOO , Jie-Hyun LEE , Sang-Soo LEE , Jong-Hyun Lee
CPC classification number: H04B10/27 , H04B10/548 , H04L27/2649 , H04L27/2697
Abstract: An orthogonal frequency division multiple access-passive optical network including a plurality of optical network units each configured to generate orthogonal frequency division multiplexed signals, which are allocated thereto, based on a central frequency for frequency division multiplexing that is allocated in advance, and to use the generated signals in upstream transmission.
Abstract translation: 一种正交频分多址无源光网络，包括多个光网络单元，每个光网络单元被配置为基于预先分配的用于频分复用的中心频率而分配给它们的正交频分复用信号，并且使用 在上行传输中产生的信号。
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公开(公告)号：US20130170834A1
公开(公告)日：2013-07-04
申请号：US13728089
申请日：2012-12-27
Inventor： Seung-Hyun CHO , Jie Hyun LEE , Seung Il MYONG , Sang Soo LEE , Jong Hyun LEE , Eui Suk JUNG , Kwang Ok KIM
IPC: H04J14/02
CPC classification number: H04J14/0278 , H04J14/02 , H04J14/0246 , H04J14/0247 , H04J14/025 , H04J14/0252 , H04J14/0282 , H04J14/0298 , H04J2014/0253
Abstract: Provided is a hybrid passive optical network (PON) system. The hybrid PON system of wavelength division multiplexing (WDM)/time division multiplexing (TDM) may include an optical line terminal (OLT) and an optical network unit (ONU). The OLT and the ONU may transmit a signal based on wavelength reuse using a seed light source and a reflective modulator. The light source may include a seed light source having a single wavelength, two seed light sources having different wavelength bands, and a light source having a wavelength tunable characteristic.
Abstract translation: 提供了一种混合无源光网络（PON）系统。 波分复用（WDM）/时分复用（TDM）的混合PON系统可以包括光线路终端（OLT）和光网络单元（ONU）。 OLT和ONU可以使用种子光源和反射调制器来发射基于波长重用的信号。 光源可以包括具有单个波长的种子光源，具有不同波长带的两个种子光源和具有波长可调特性的光源。
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公开(公告)号：US20240121002A1
公开(公告)日：2024-04-11
申请号：US18389942
申请日：2023-12-20
Inventor： Seung-Hyun CHO , Joon Ki LEE
IPC: H04B10/2575 , H04B10/077
CPC classification number: H04B10/2575 , H04B10/077 , H04B10/07
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.
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