公开(公告)号：US10700895B2

公开(公告)日：2020-06-30

申请号：US15864733

申请日：2018-01-08

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jae Hwui Bae ,  Jin Hyuk Song ,  Je Won Lee ,  Joon Young Jung ,  Dong Joon Choi ,  Nam Ho Hur

IPC: H04L25/02 ,  H04L27/26

Abstract: Disclosed are a roll-off period detection method, a symbol starting point detection method, a fractional frequency offset estimating method, and an OFDM downstream system using the same. A method of detecting a roll-off period in an OFDM downstream system according to an embodiment of the present disclosure may include: generating a temporary roll-off period by applying a windowing function to a signal having a preset length; and detecting a roll-off period based on any one of a cross correlation and a sum of differences between a detection target signal included in a range of two OFDM symbol signals based on a detection starting point, and the temporary roll-off period.

公开(公告)号：US10193687B2

公开(公告)日：2019-01-29

申请号：US15441799

申请日：2017-02-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jae Hwui Bae ,  Sang Jung Ra ,  Jin Hyuk Song ,  Dong Joon Choi ,  Nam Ho Hur

IPC: H04L7/06 ,  H04L1/00 ,  H04L5/00 ,  H04L27/26 ,  H04L27/38 ,  H04L29/08

Abstract: Disclosed are a method for acquiring synchronization in a cable network, and a physical (PHY) transmitter and PHY receiver. The method for acquiring synchronization in a cable network according to an embodiment includes receiving, by a PHY receiver, a signal from a PHY transmitter, and acquiring, by the PHY receiver, channel synchronization when a symbol in which a channel preamble exists is detected from the received signal and a position of a frequency in which a channel subcarrier exists is detected from the detected symbol by performing a cross correlation operation on the received signal and the channel preamble.

公开(公告)号：US10110275B2

公开(公告)日：2018-10-23

申请号：US15656906

申请日：2017-07-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Hwui Bae ,  Sang-Jung Ra ,  Jin Hyuk Song ,  Joon Young Jung ,  Dong Joon Choi ,  Namho Hur

IPC: H04B3/00 ,  H04B3/46 ,  H04B17/21 ,  H04B1/06 ,  H04B3/23 ,  H04L5/00 ,  H04L7/00 ,  H04L29/08

Abstract: A method of estimating an integer frequency offset and compensating for the integer frequency offset by an estimated error is provided. A frequency offset estimation method may include receiving a reception signal including PLC data and a physical layer link channel (PLC) preamble, detecting first position information on a position of a subcarrier of the PLC preamble in a frequency axis from the reception signal through a cross-correlation between the PLC preamble and the reception signal, detecting second position information on the position of the subcarrier of the PLC preamble defined in a transmission end by restoring the PLC data, and calculating a frequency offset by comparing the first position information with the second position information.

公开(公告)号：US20140223506A1

公开(公告)日：2014-08-07

申请号：US14088427

申请日：2013-11-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sang Woo Ahn ,  Kwi Hoon Kim ,  Jae Hwui Bae

IPC: H04N21/43

CPC classification number: H04N21/4307 ,  H04N13/167 ,  H04N13/194 ,  H04N21/4305 ,  H04N21/4345 ,  H04N21/4622 ,  H04N21/631 ,  H04N21/816

Abstract: There is disclosed a method of synchronizing a first image and a second image forming multiple images in broadcasting service based on the multiple images. The method includes receiving a stream regarding the first stream and a stream regarding the second stream through a plurality of channels, obtaining the first image and the second image by decoding the stream regarding the first stream and the stream regarding the second stream and obtaining a base Program Clock Reference (PCR) descriptor in at least one of the stream regarding the first stream and the stream regarding the second stream, selecting a base stream based on the base PCR descriptor and determining a base PCR based on the base PCR descriptor, and synchronizing the first image and the second image based on the base PCR.

Abstract translation: 公开了一种基于多个图像同步在广播服务中形成多个图像的第一图像和第二图像的方法。 该方法包括通过多个通道接收关于第一流的流和关于第二流的流，通过解码关于第一流的流和关于第二流的流来获得第一图像和第二图像，并获得基 在关于第一流和关于第二流的流的至少一个流中的程序时钟参考（PCR）描述符，基于基本PCR描述符选择基本流，并基于基本PCR描述符确定基本PCR，并同步 基于PCR的第一图像和第二图像。

公开(公告)号：US09460351B2

公开(公告)日：2016-10-04

申请号：US14035803

申请日：2013-09-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kwi Hoon Kim ,  Woong Shik You ,  Jae Hwui Bae ,  Sang Woo Ahn ,  O Hyung Kwon

IPC: H04N13/04 ,  G06K9/00 ,  G06F3/01 ,  G01S17/02 ,  H04N7/14 ,  G01B11/02 ,  H04N7/18 ,  G08B13/196 ,  H04N7/15 ,  G06F3/14 ,  H04N21/218 ,  H04N21/2187 ,  H04N21/431 ,  H04N21/2743

CPC classification number: G06K9/00771 ,  G01B11/022 ,  G01S17/023 ,  G06F3/013 ,  G06F3/017 ,  G06F3/14 ,  G06F3/1454 ,  G06K9/00335 ,  G08B13/19621 ,  H04N7/144 ,  H04N7/147 ,  H04N7/15 ,  H04N7/181 ,  H04N21/21805 ,  H04N21/2187 ,  H04N21/2743 ,  H04N21/4316 ,  H04N2007/145

Abstract: An image processing apparatus using a smart glass is provided, the image processing apparatus including an extractor to extract a first target to be observed by a user from a first image received from the smart glass and generate a second image using the extracted first target, an information collector to collect information related to the first target, and an image generator to reconstruct a third image using at least one of the second image and the information related to the first target, based on user settings.

Abstract translation: 提供了一种使用智能玻璃的图像处理装置，所述图像处理装置包括提取器，用于从由所述智能玻璃接收的第一图像提取用户观察到的第一目标，并使用所提取的第一目标生成第二图像; 信息收集器，用于收集与第一目标相关的信息;以及图像生成器，用于基于用户设置，使用第二图像和与第一目标相关的信息中的至少一个来重建第三图像。