Abstract:
본 발명은 전력측정장치의 전압 및 전류 신호간의 위상차를 보정하기 위한 위상 보정 장치와 방법 및 이를 적용한 전력측정장치에 관한 것이다. 본 발명에 따른 위상 보정 장치는 부하의 전압 신호와 전류 신호에 포함된 고조파 성분을 제거하여 기본파 성분을 추출하고, 상기 기본파 성분으로부터 상기 전압 신호의 위상과 상기 전류 신호의 위상을 계산하고, 상기 전압 신호와 상기 전류 신호간의 위상차를 계산하는 위상 추정부 및 상기 위상 추정부로부터 입력받은 위상차에 따라 상기 전압 신호 또는 상기 전류 신호를 지연시켜 상기 전압 신호 또는 상기 전류 신호의 위상을 보정하는 위상 보정부를 포함하여 구성된다. 본 발명에 따르면, 전압 및 전류 신호의 기본파 성분을 추출하여 위상차를 추정함으로써, 교류 신호에 포함되어 있는 고조파 성분으로 인한 추정 위상의 정확도 저하 문제를 해결할 수 있는 효과가 있다.
Abstract:
오디오 신호와 커맨드의 복합 처리 방법 및 이를 적용한 오디오 시스템이 제공된다. 본 발명의 실시예에 따른 오디오 처리 방법은, 오디오 신호에 관련한 커맨드를 입력받아 오디오 신호의 특정 대역에 수록하여 전송한다. 이에 의해, 새로운 장비 추가 없이 기존의 오디오 시스템을 이용하여 오디오 관련 커맨드를 전달할 수 있게 된다.
Abstract:
The present invention relates to a system and a method for providing content according to a premise wireless network connection state and, more specifically, to a method for smoothly providing content even when usage of premise users or terminals connected to the same wireless network is increased. To this end, the system for providing content of the present invention comprises a digital media renderer (DMR) to play received content; a digital media server (DMS) to transmit the content to the DMR; and a dynamic content management controller (DMC) to control the DMR and the DMS, wherein the DMC includes a network monitoring unit to monitor a network state with the DMS and the DMR; an information collection unit to collect information of the DMS; a device state analysis unit to check a format of the content stored in the DMS and a format which can be played in the DMR; a media level analysis unit to compare a network level provided from the network monitoring unit with a network level of the DMR checked by the device state analysis unit; and a control unit to command the content stored in the DMS to be transmitted or converted into a specific format and transmitted according to the analysis result of the media level analysis unit.
Abstract:
The present invention provides a device and a method to verify compatibility. A compatibility verification device according to an embodiment of the present invention includes: a database for storing support information of at least one possessed device which supports a universal plug and play (UPnP); and a control unit for discovering a device of interest which supports the UPnP in a local network with a UPnP method, obtains support information of the device of interest with the UPnP method, compares the support information of the device of interest with support information of the possessed device corresponding to the device of interest and confirms the compatibility between the corresponding possessed device and the device of interest. [Reference numerals] (110) Communication unit; (120) Control unit; (130) Display unit; (140) Database; (AA) Media server; (BB) Media renderer 1; (CC) Media renderer 2
Abstract:
PURPOSE: A hybrid broadcast system using data communication at the small area is provided to be offered so that a user within a relevant range only sees a new service in the exhibition or museum etc in which regional scope is limited. CONSTITUTION: A broadcast data receiving unit (110) receives broadcast data and additional information for a new service. A digital multimedia broadcasting (DMB) transmission frame multiplexer (120) produces a DMB transmission frame constituting an ensemble of the new service using the broadcast data. A DMB transmission frame delivery unit (130) transmits the produced DMB transmission frame. An additional information delivery unit transmits the additional information of the received new service through an internet network. [Reference numerals] (110) Broadcast data receiving unit; (120) DMB transmission frame multiplexer; (130) DMB transmission frame delivery unit; (AA) DMB network; (BB) DMB transmission frame; (CC) Internet network; (DD) Additional information (FIB)
Abstract:
PURPOSE: An integral de-multiplexing device and a method thereof are provided to de-multiplex signals for DVB-T. T-DMB, and ISDB-T. CONSTITUTION: A de-multiplexer(410) collects de-multiplexing information according to DVB-T. T-DMB, and ISDB-T. The de-multiplexer distinguishes a TS(Transport Stream) into a video ES(Elementary Stream), an audio ES, and exclusive data using the de-multiplexing information. A video buffer(421) stores the video ES. An audio buffer(422) stores the audio ES. An exclusive data buffer(423) stores the exclusive data.
Abstract:
PURPOSE: An apparatus and a method for synchronizing an OFDM signal are provided to adjust an FFT window and a sampling frequency by using an impulse response to a channel estimation value. CONSTITUTION: A channel estimator(140) performs channel estimation of an OFDM signal which is transformed from a time domain to a frequency domain by using FFT(Fast Fourier Transform). An impulse response calculation unit(150) calculates an impulse response of the channel estimation value which is obtained through the channel estimator. An FFT window adjust unit(160) controls the position of the FFT window by using the impulse response which is calculated in the impulse response calculation unit. A sampling frequency correction unit(180) corrects the sampling frequency by using the impulse response calculated in the impulse response calculation unit.