Electronics and Telecommunications Research Institute

Byung-Tak Lee

Young Sun Kim

Sim-Kwon Yoon

Mun Seob Lee

Jai Sang Koh

Jai-sang Koh

Gi Hyeon Min

Nac Woo Kim

Hong Yeon Yu

Nack Woo Kim

Ilkyun Park

Seung-hun Oh

Dongsoo Lee

Hark Yoo

Young-Sun Kim

Seihyoung Lee

Jong-Deog Kim

Dong-soo Lee

Bin-yeong Yoon

Dae Won Choi

Il-kyun Park

Mun-seob Lee

Sangkyune Kim

Il Kyun Park

Byongkwon Moon

Kyunghun Kim

Kyung-hun Kim

Nao Woo Kim

Il-Kyun Park

Seokkap Ko

Nac-woo Kim

Seok-Kap Ko

Byong-kwon Moon

Seok-kap Ko

Sim-kwon Yoon

A hologram image acquiring apparatus includes a linear polarizer that filters incident light reflected by an object into a polarized component of a specific angle; a spherical lens that partially converts light that is incident through the linear polarizer to a spherical waveform; and a phase shifter that converts a part of the light incident through the spherical lens to a plane waveform having a respective phase per pixel unit.

Apparatus and method for hologram image acquisition

Provided is a micro robot position detection device. The device includes a micro robot position detection unit that uses a micro robot control parameter to filter a reflected signal of an ultra wide-band impulse radar signal emitted to a micro robot to extract, as a micro robot signal, a natural oscillating frequency signal generated when the micro robot is driven through control of external electromagnetic field, and analyzes the micro robot signal based on a transmission and reception parameter of the ultra wide-band impulse radar signal to calculate position information for the micro robot. Also, the device may further include an image matching unit that receives position information for the micro robot and performs position correction on the received position information based on pre-stored reference image data and the image data.

Method and device for detecting position of micro robot using ultra wide-band impulse radar signal

There are provided an image processing device and a processing method thereof. The image processing method includes obtaining an interference signal using a sample beam and a reference beam, transforming the interference signal by using a numerical signal processing method or an intensity mixing method to generate a transformed interference signal, and obtaining a three-dimensional (3D) phase image by using the interference signal and the transformed interference signal.

Image processing device and processing method thereof

An imaging sensor includes at least one fiber Bragg grating for filtering an image from a subject for wavelength bands, and an imaging device for converting an image transmitted through the fiber Bragg grating into a digital signal.

Imaging sensor with Bragg filter and method of manufacturing the same

Provided is a method of supporting CoAP-based sensor data transmission between a sensor data collector in a sensor node relay and one or more 6LoWPAN-unsupported sensor nodes. The method includes receiving a CoAP sensor data request message from the sensor data collector, transmitting a CoAP sensor data request message to a corresponding 6LoWPAN-unsupported sensor node by analyzing the received CoAP sensor data request message, and responding to the sensor data collector by creating a CoAP sensor data response message including sensor data received from one or more of the 6LoWPAN-unsupported sensor nodes.

Device and method for supporting internet-based sensor data transmission

In a sensor network, a sensor data processing apparatus generates a feature vector identifier table by classifying feature vector identifiers of a plurality of situation information determination reference data to be a reference of situation determination according to a sensor type index and a feature vector identifier set index of the plurality of situation information reference data. When the sensor data processing apparatus receives sensor data, the sensor data processing apparatus generates a feature vector identifier of the sensor data and extracts a sensor type index and a feature vector identifier set index of a feature vector identifier most similar to the feature vector identifier of sensor data with reference to a feature vector identifier table, and generates situation recognition information using the extracted sensor type index and feature vector identifier set index.

Apparatus and method for processing sensor data in sensor network using a feature vector identifier of the sensor data

Provided are a channel server, a channel prediction server, a terminal, and a method for a fast channel switching. The channel server may generate at least one delay multicast stream from an original multicast stream by applying a different delay value based on channel preference information, and may determine an optimal multicast stream from the at least one delay multicast stream, and transmit, to a terminal, response information associated with the optimal multicast stream in response to query information associated with the original multicast stream received from the terminal.

Channel server, channel prediction server, terminal, and method for fast channel switching using plurality of multicasts interoperating with program rating prediction

A fragmentation repetition detection apparatus () for detecting an IP fragmentation repetition which may occur in a multicast or unicast environment is provided. The fragmentation repetition detection apparatus () includes a packet capturing unit () which captures a received packet, a fragmentation repetition detector which detects whether or not the captured packet is a packet which is repetitively fragmented, and a path maximum transmission unit (PMTU) transmitter () which transmits PMTU information acquired by the fragmentation repetition detector () to a server which transmits the packet when the captured packet is a packet which is repetitively fragmented. Since a packet is transmitted by readjusting a PMTU, a fragmentation of an IP packet can be prevented.

System for controlling path maximum transmission unit by detecting repetitional IP packet fragmentation and method thereof

Disclosed is a broadcast advertisement service system based on media ID matching, including: a broadcast-contents receiving terminal for receiving broadcast contents from a broadcasting system for a TV broadcaster and displaying the broadcast contents; a server for an AR advertisement broadcaster for receiving the broadcast contents from the broadcasting system for the TV broadcaster, generating a first media ID lookup table from the broadcast contents, and searching for AR advertisement data linked with on-air broadcast contents by referring to the first media ID lookup table; and a user terminal for acquiring the on-air broadcast contents in real time from the broadcast-contents receiving terminal, generating a second media ID lookup table from the acquired on-air broadcast contents, receiving the AR advertisement data linked with the on-air broadcast contents from the server for the AR advertisement broadcaster, and mixing and displaying the acquired on-air broadcast contents and the received AR advertisement data in real time.

Broadcast augmented reality advertisement service system and method based on media ID matching

A burst mode optical repeater is provided. The burst mode optical repeater receives optical signals, which are transmitted from a plurality of optical network units (ONUs) in a passive optical network (PON) to a central office using a time division multiplexing access (TDMA) method, and relays the received optical signals using an optical-electrical-optical (OEO) method. Since the burst mode optical repeater can be installed anywhere between an optical line terminal (OLT) and the ONUs, the number of subscribers and transmission range that can be supported by a corresponding network can be increased.

Burst mode optical repeater

Disclosed is a multicast controlling apparatus and method in a multi hop network. The multicast controlling apparatus in the multi hop network includes a packet determining unit to receive a packet from a group management query device or a station, and to determine whether the received packet is a group management protocol packet, a packet type distinguishing unit to distinguish a type of the received packet when the received packet is determined as the group management protocol packet, and a packet transmitting unit to transmit the packet to a second port excluding a first port that receives the query message, when the received packet is determined as the query message.

Apparatus and method for controlling multicast in multi hop networks

Disclosed is a system of transporting multimedia based on network, and more particularly, to an apparatus for inserting, transporting and extracting a timestamp through a network protocol. A network timestamp is transported without changing a preset transport standard such as a UDP, an RTP and a MPEG-2 standard by adding a packet having a timestamp, which is used to compensate for network jitter and used for synchronization, to a packet stream transported through a UDP or an RTP.

Apparatus and method for inserting or extracting network timestamp

Growing community of inventors

Suwon-si, South Korea

Byung-Tak Lee