Abstract:
방송 신호 전송 방법에서, 전송 프레임은 기존의 지상파 DMB 신호의 구조와 동일한 구조를 가지며, 기본 계층 서비스 스트림을 포함하는 전송 프레임은 기본 계층으로 변조되고, 강화 계층 서비스 스트림을 포함하는 전송 프레임은 강화 계층으로 변조된다. 이때, 강화 계층 서비스 스트림은 강화 계층 서비스를 제공하기 위하여 기본 계층 서비스 스트림에 포함되지 않은 부가적인 데이터로 구성된다. 이와 같이 하면, 기존의 지상파 DMB와 호환가능하면서도, 고전송 효율을 요구하는 고품질의 서비스를 제공할 수 있다. 이때, 고전송 효율은 기존의 지상파 DMB보다 높은 데이터 전송률을 의미한다. 지상파 DMB, 방송, 계층적 변조 방식, 고품질 서비스, 비디오 서비스
Abstract:
본 발명은 방송신호 송수신 장치와 그 방법에 관한 것으로, 더욱 상세하게는 디지털 방송신호의 송수신 장치와 그 방법에 관한 것이다. 본 발명의 바람직한 실시 예에 따른 장치는, 방송신호 송신장치로서, 전송할 디지털 방송신호를 미리 결정된 변조 방식으로 변조하는 방송신호 변조부와, 디지털 방송신호의 각 부가 데이터들을 미리 저장된 확산코드에 매핑하여 워터마킹용 확산코드를 생성하는 부가 데이터별 확산코드 매핑부와, 변조된 디지털 방송신호에 워터마킹용 확산코드를 삽입하여 송출용 디지털 방송신호를 생성하는 확산코드 삽입부와, 생성된 송출용 디지털 방송신호를 송출하는 방송신호 송출부를 포함한다. TxID(Transmitter Identification), 워터마킹(watermarking), 부가 데이터, 디지털 방송신호.
Abstract:
PURPOSE: A T-DMB(Terrestiral-Digital Multimedia Broadcasting) transmitter and receiver are provided to improve transfer capacity keeping reverse compatibility. CONSTITUTION: An RS(Reed-Solomon) encoder(320) performs the RS encoding of a broadcasting signal. An FEC(Forward Error Correction) encoder(330) performs the channel encoding of an additional signal. A selector(340) selects the RS-encoded broadcasting signal or the channel-encoded additional signal. A VSB(Vestigial Side Band) transmitting unit(370) transmits the signal through an transmission antenna to a receiver.
Abstract:
PURPOSE: An apparatus and a method for controlling an infrastructure are provided to control remote control objects which are located in a wire region using a simple receiver. CONSTITUTION: A broadcasting contents modulator(302) modulates broadcasting contents(301) into a pre-set mode. A signal generator(303) generates information signal for controlling the remote control of an infrastructure. An adding unit(304) combines the modulated broadcasting contents and the information signal. A digital TV(DTV) signal transmitter(305) converts the added signal to DTV broadcasting signal. The DTV signal transmitter transmits the converted DTV broadcasting signal.
Abstract:
PURPOSE: A method of channel equalization using channel estimation and a device for the same are provided to change a channel property in a time domain, thereby improving the performance of channel equalization. CONSTITUTION: A channel estimation unit(330) performs channel estimation using a pilot signal of a frequency domain. A digital filter(310) changes a channel property in a time domain using a channel estimation result estimated from the channel estimation unit. A channel equalization unit(320) performs channel equalization in the frequency domain of a signal changed in the digital filter. The channel estimation unit obtains the channel property in a time domain using the pilot signal of the frequency domain. The channel estimation unit performs channel estimation using the channel property in the obtained time domain.
Abstract:
본 발명은 디지털 방송 시스템에서 송신단을 식별하는 수신 장치 및 방법에 관한 것으로, 확산코드가 워터마킹된 디지털 방송신호를 수신하는 방송신호 수신부; 확산코드의 일정부분을 0으로 대체한 참조신호를 이용하여 상관처리과정을 수행하는 상관 처리부; 및, 상관처리 결과를 이용하여 송신단을 식별하는 송신단 식별부를 포함하여 상관처리시 연산량을 줄이는 효과를 가진다. TxID, 워터마킹, Decimation 알고리즘, 디지털 방송 시스템, 상관기, 송신기 식별
Abstract:
An apparatus and a method for equalizing the reception channel in an OFDM(Orthogonal Frequency Division Multiplexing) transmission system and a DMB(Digital Multimedia Broadcasting) receiving apparatus applying the same are provided to improve the performance of mobile reception in a transmission system in which pilot signal is not used. A channel estimator(520) estimates channel as a symbol unit with the reference signal received from the standard signal creation part(550). A channel filtering part(530) removes the noises of the presumed channel value. A channel equalization part(540) equalizes the channel by using the estimation channel value. The channel estimator estimates the PRS(Phase Reference Symbol) of the received frame by the reference signal.
Abstract:
A method for multiplexing frame of digital broadcasting signal, apparatus thereof, and transmission apparatus are provided to fit transmission synchronization of a plurality of transmission frames including a service stream about an identical service without a separate field. An apparatus for multiplexing frame of digital broadcasting signal comprises a first buffer(611), a second buffer(612), a time comparison processing unit(630), a first frame generator(651), a second frame generator(652), and a time stamp generator(660). The first buffer stores a first service stream received from outside. The second buffer stores a second service stream received from outside. The time comparison processing unit compares a first service time data about the first service stream with a second service time data about the second service stream. The first frame generator outputs a first frame including the first service stream outputted in the first buffer. The second frame generator outputs a second frame including the second service stream outputted in the second buffer. The time stamp generator generates a first transmission time data comprised in a time stamp field of the first frame and a second transmission time data comprised in a time stamp field of the second frame.
Abstract:
A transmission method of a digital broadcasting signal, a transmitting device, a receiving method and a receiving device are provided to separate a stream into a plurality of layers according to characteristics of the streams and to allocate frequency dynamically based on processed signal after individually processing each layer. A single stream separates a plurality of layers according to the property of stream(130). The coding and mapping about the discrete layer are executed(150). The frequency about the discrete layer based on the number of symbols about the discrete layer is dynamically assigned(160).