Abstract:
PURPOSE: A method for analyzing and validating data which are collected through the internet and a system thereof are provided to generate an index database for a webpage that a user visits and web mail content and search online data in real time. CONSTITUTION: An online data forensic server(210) collects and analyzes usage history information from a target device for data collection. The online data forensic server downloads and collects data in the Internet based on the usage history information and requests and receives a timing check token for the collected data. A timing check token issuing server(220) issues a timing check token for the collected data and provides the timing check token to the online data forensic server.
Abstract:
PURPOSE: A MIMO(Multiple Input Multiple Output) transmission method in a digital video broadcasting system and a device thereof are provided to make an average output power of a signal inputted to each antenna equal or similar to each other. CONSTITUTION: An r2n-1 and an r2n are generated by the combination of a transmission signal modulated by 16QAM(Quadrature Amplitude Modulation) and QPSK(Quadrature Phase Shift Keying) modulation through a precoding process. A value with a different component size of 16QAM and QPSK is included in the r2n-1 and the r2n. The r2n-1 and the r2n have a different PAPR (Peak-to-Average Power Ratio) value from each other. A precoded r2n-1 and r2n are alternatively inputted to an amplifier connected to each antenna for the signal inputted to an amplifier before amplification of the output signal from antenna 1 and antenna 2.
Abstract:
본 발명은 계층 변조가 적용된 지상파 DMB 시스템에서 변조 모드 검출 신호를 송신하는 방법 및 장치에 관한 것이다. 이를 위하여, 본 발명은 이동 방송 서비스를 위하여 입력된 제1 신호와 계층 변조를 위하여 입력된 제2 신호를 합하여 계층 변조가 적용되지 않는 신호를 검출하고, 사전에 설정된 시간 간격에 따라 하나 이상의 신호로 분할하여 각각의 분할된 신호에 암호화/복호화를 위한 시퀀스를 삽입한 뒤, 다시 합하여 송출하는 변조 모드 검출 신호 송신 방법을 제공한다. 또한, 본 발명은 이동 방송 서비스를 위하여 입력되는 신호를 처리하는 제1 신호 처리부; 계층 변조를 위하여 입력되는 신호를 처리하는 제2 신호 처리부; 및 제1 신호와 제2 신호를 합하여 시간 간격에 따라 분할하고, 분할된 신호에 암호화/복호화를 위한 시퀀스를 삽입시켜 송출하는 시퀀스 삽입부를 포함하는 변조 모드 검출 신호 송신 장치를 제공한다. 본 발명에 의하면, 이동 방송 시스템의 수신단이 새롭게 추가된 신호에 적용된 변조 방식을 용이하게 검출할 수 있으며, 복수 개의 변조 방식을 동시에 사용할 수 있어 데이터 전송률을 추가로 향상시킬 수 있다. DMB, T-DMB, 계층 변조, PN 시퀀스, PRS, 성상비
Abstract:
PURPOSE: A transceiver supporting hierarchical modulating method of a T-DMB system is provided to minimize interference between two broadcasting signals. CONSTITUTION: A T-DMB(Terrestrial-Digital Multimedia Broadcasting) transmitter includes an HP(High Priority) signal transmitter(100), an LP(Low Priority) signal transmitter(200), and a hierarchical modulator(300). The hierarchical modulator increases an LP signal and an HP signal.
Abstract:
PURPOSE: A high-speed password searching device and a method using graphic processor are provided to store candidate password in a memory and find justified candidate password through comparing operation, thereby guaranteeing faster speed than password using password search software. CONSTITUTION: A high-speed password search device comprises a CPU(Central Processing Unit)(100) and a graphic processor(200). The CPU extracts password comparison target data from encrypted file. The CPU generates candidate passwords. The graphics processor uses extracted password comparison target data and generated candidate passwords as parameters. The graphics processor searches processor candidate password.
Abstract:
PURPOSE: A mobile RFID(Radio Frequency IDentification) based forensic evidence analysis method and a device thereof are provided to add a digital forensic function in a mobile terminal. CONSTITUTION: A buffer control module(122) buffers data flowed from an RFID tag reader module. A forensic analysis execution module(120) extracts data according to an extraction option from data buffered in the buffer control module. A storage module(130) stores the extracted data. A forensic analysis control module(110) receives an analysis request from a user. The forensic analysis control module transfers the request to the forensic analysis execution module.
Abstract translation:目的:提供基于移动RFID(Radio Frequency Identification)的法医证据分析方法及其装置,以在移动终端中增加数字取证功能。 构成:缓冲器控制模块(122)缓冲从RFID标签读取器模块流出的数据。 取证分析执行模块(120)根据从缓冲器控制模块中缓存的数据中的提取选项提取数据。 存储模块(130)存储所提取的数据。 取证分析控制模块(110)从用户接收分析请求。 法医分析控制模块将请求传送到法医分析执行模块。
Abstract:
PURPOSE: A method and a device of providing local broadcasting services are provided to offer new local area broadcasting service having T-DMB while using AT-DMB(Advanced Terrestrial-Digital Multimedia Broadcasting) network. CONSTITUTION: A signal converter(310) changes the first main broadcasting signal suitable for the long distance transmission longer than the fundamental distance into the second main broadcasting signal suitable for LAT shorting than the fundamental distance. A local signal encoder(320) encodes the first local broadcast signal to generate the second region broadcast signal. A local signal inserter(330) inserts the information informing the presence of the region broadcast signal into the second main broadcasting signal to generate the third main broadcasting signal. A layer modulator(340) modulates the second region broadcast signal and the third main broadcasting signal layer to generate and transmit the fourth broadcast signal.
Abstract:
PURPOSE: A DMB(Digital Multimedia Broadcasting) transceiving apparatus and method are provided to include specific information in a pilot signal for channel estimation, thereby improving a data transfer rate. CONSTITUTION: A pilot signal generator(120) is used for estimation of a transmission channel in a receiving unit. The pilot signal generator creates a pilot signal. The pilot signal comprises one or more information. A subcarrier mapping unit(130) maps the pilot signal to subcarrier corresponding to the pilot signal. A modulator(140) modulates the output of the subcarrier mapping unit. The pilot signal has a value about the specific information, not a value which the receiving unit has previously acknowledged.
Abstract:
PURPOSE: A DMB(Digital Multimedia Broadcasting) transmission/reception apparatus and a method thereof equipped with a prior coding unit are provided to reduce computational complexity by including the prior coding unit. CONSTITUTION: A DMB transmission/reception apparatus comprise a variable spreader(120), a modulator(130) and an antenna(140). The modulator modulates the output of the variable spreader. The antenna transmits a message the forged signal. The variable spreader comprises a spreader and prior coding unit. A spreader diffuses the pilot signal in the frequency domain. The prior coding unit multiplies the orthogonal code in the signal outputted in spreader.
Abstract:
본 발명은 채널계수의 크기 기반 채널 등화 장치 및 그 방법에 관한 것으로, 더욱 상세하게는 엠어리(M-ary) PSK(Phase Shift Keying)를 추가계층 신호 변조방식으로 하는 OFDM 기반 계층변조 전송 시스템 등에서 채널추정 결과를 판정기반 방식과 조합하여 채널을 등화함으로써, 채널 등화 결과신호의 분산을 감소시켜 잡음증폭이 발생할 확률을 감소시키기 위한, 채널계수의 크기 기반 채널 등화 장치 및 그 방법에 관한 것으로서, 채널계수의 크기 기반 채널 등화 장치에 있어서, 심벌의 부반송파에 대한 추정된 채널계수를 등화 수단으로 전달하기 위한 채널 보간 수단; 추정된 기본계층 심벌을 상기 등화 수단으로 전달하기 위한 매핑 수단; 및 수신 심벌, 상기 채널 보간 수단으로부터 전달받은 채널계수 및 상기 매칭 수단으로부터 전달받은 기본계층 심벌을 이용하여 채널을 등화하기 위한 상기 등화 수단을 포함한다. 계층변조, 디지털 방송, 채널 등화, 잡음증폭