公开(公告)号：US20200162736A1

公开(公告)日：2020-05-21

申请号：US16684041

申请日：2019-11-14

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin-Wuk SEOK ,  Hyunsuk KO ,  Youn-Hee KIM ,  Jong-Ho KIM ,  Joo-Young LEE ,  Woong LIM ,  Se-Yoon JEONG ,  Seung-Hyun CHO ,  Hui-Yong KIM ,  Jin-Soo CHOI

IPC: H04N19/124 ,  H04N19/18 ,  H04N19/184

Abstract: Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In image encoding, encoding using multiple quantization parameters is performed on a transform coefficient. Two quantized coefficients are generated through encoding that uses two quantization parameters. Based on the two quantized coefficients, a quantized coefficient difference is generated. Information about the quantized coefficient difference is transmitted from an encoding apparatus to a decoding apparatus through binary encoding. The information about the quantized coefficient difference may be selectively transmitted. By means of the information about the quantized coefficient difference, a high-quality video may be provided.

公开(公告)号：US20200044756A1

公开(公告)日：2020-02-06

申请号：US16529929

申请日：2019-08-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Minkyu SUNG ,  Joonyoung KIM ,  Jong Hyun LEE ,  Seung-Hyun CHO

IPC: H04B17/336 ,  H04B10/114 ,  H04B10/079 ,  H04B10/2575

Abstract: A transmission performance monitoring method for monitoring a transmission performance based on an analog optical link and an apparatus performing the method. The transmission performance monitoring method and apparatus centrally monitor an RF signal transmission performance in an analog optical link-based mobile haul or indoor distributed antenna system.

公开(公告)号：US20190165866A1

公开(公告)日：2019-05-30

申请号：US16197793

申请日：2018-11-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joonyoung KIM ,  Minkyu SUNG ,  Jong Hyun LEE ,  Seung-Hyun CHO

IPC: H04B10/58 ,  H04B10/516

Abstract: A method and apparatus for adjusting a modulation index of an analog optical signal using an interference phenomenon of a coherent light, the method including dividing an analog optical signal for a first path and a second path, extracting an optical carrier from an analog optical signal divided for the first path, controlling an intensity and a phase of the optical carrier, and controlling a modulation index of the analog optical signal by combining an analog optical signal divided for the second path and the optical carrier of which the intensity and the phase are controlled.

公开(公告)号：US20140219659A1

公开(公告)日：2014-08-07

申请号：US14082902

申请日：2013-11-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kyeong-Hwan DOO ,  Hak-Jeon BANG ,  Seung-Il MYONG ,  Seung-Hyun CHO ,  Jie-Hyun LEE

IPC: H04L27/26

CPC classification number: H04L27/2608 ,  H04L5/0039 ,  H04L5/0053 ,  H04L5/0064 ,  H04L27/2697 ,  H04Q11/0067

Abstract: There are provided a method of allocating upstream bandwidth resources and a method of transmitting upstream data in an orthogonal frequency division multiple access-open optical subscriber network. The method of allocating an upstream bandwidth resource according to an embodiment of the invention includes receiving queue status information from each optical network unit (ONU), and allocating an upstream bandwidth by providing to each ONU a 2-D upstream bandwidth map on a subcarrier-time resource through a frame synchronized at constant cycles, based on the queue status information received from each ONU.

Abstract translation: 提供了一种分配上行带宽资源的方法和在正交频分多址接入开放光用户网络中发送上行数据的方法。 根据本发明实施例的分配上行带宽资源的方法包括从每个光网络单元（ONU）接收队列状态信息，并且通过向每个ONU提供子载波上的带宽映射的分配上行带宽， 基于从每个ONU接收的队列状态信息，通过以恒定周期同步的帧的时间资源。