Abstract:
PURPOSE: An apparatus for single transmission broadcasting service without needing an ETI input signal process is provided to efficiently construct a transmission system through a multiplexer and a transmitter. CONSTITUTION: An MSC(Main Service Channel) generating unit(207) generates an MSC which is necessary for each transmission frame. An FIC(Fast Information Channel) generating unit(209) generates an FIC based on MCI and SI information which is received from an multiplex managing unit. A transmission frame configuring unit(211) configures a transmission frame to the MSC which is generated from the MSC generating unit. A DMB(Digital Multimedia Broadcasting) modulating unit(213) receives the transmission frame from the transmission frame configuring unit.
Abstract:
PURPOSE: A method for transmitting supplementary data in the digital terrestrial broadcasting system and a device thereof are provided to determine the broadcasting area of a transmitter to which a user belongs when the user requests supplementary data. CONSTITUTION: A primary signal generating unit(101) transforms primary data into a primary signal by the channel coding for the primary data. A supplementary signal generating unit(102) transforms supplementary data into a supplementary signal by the channel coding for the supplementary data. A mixing signal generating unit(103) generates a mixed signal by combining the primary signal and the supplementary signal. A mixing signal transmitting unit(104) transmits the mixed signal to a receiver.
Abstract:
PURPOSE: A hierarchical modulation setting apparatus and a method thereof are provided to set up the hierarchical modulation of a DMB transmitter through the output ETI of a multiplexer in a configuration of a transmission network for AT-DMB. CONSTITUTION: A signaling message generating unit(311) generates a signaling message including layer modulation setup information. A frame configuration unit(313) configures an ETI frame including the signaling message based on ETI(Ensemble Transport Interface) standards. A transmitting unit(315) transmits the ETI frame to a DMB transmitter through ETI network according to the ETI standard.
Abstract:
PURPOSE: A device and a method of inserting information into a fast information channel are provided to easily add additional information to a fast information channel without changing a service. CONSTITUTION: A decoding unit(410) extracts the first fast information channel data from a transmission frame. An FIC modifier(420) performs re-multiplexing based on information to which data fields will be inserted for at least one block. The FIC modifier reconfigures the blocks to generate the second FIC data. An encoding unit(430) replaces the first FIC data with the second FIC data.
Abstract:
PURPOSE: An apparatus for transmitting and receiving digital multimedia broadcasting and a method thereof are provided to change the modulation system of the enhancement layer stream according to the broadcasting environment. CONSTITUTION: The base layer processing unit(103) outputs the base layer stream. The enhancement layer processing unit(104) outputs the enhancement layer stream. The transmission unit(105) modulates the enhancement layer stream among the first and second layer modulation mode based on one layer modulation mode. The transmission unit is proceed the mapping of the symbol of the enhancement layer stream based on the symbol location of the base layer stream. The transmission unit is created the transfer frame. The different modulation system is used to the first and second layer modulation mode.
Abstract:
제1 네트워크와 제2 네트워크의 ETI(Ensemble Transport Interface) 신호의 동기화를 수행하기 위해서, 동기화 장치는 제1 네트워크로부터 제1 ETI 신호를 수신하고, 제2 네트워크로부터 제2 ETI 신호를 수신하고, 제1 ETI 신호의 프레임과 제2 ETI 신호의 프레임을 비교하여 동일 프레임 간의 지연 시간을 생성하고, 지연 시간에 따라 제1 ETI 신호와 제2 ETI 신호를 동기화한다. DMB, ETI, 방송 송출
Abstract:
A signal transmission method and a signal receiving method in a broadcasting system are provided to mutually link services of two ensemble transfer frames, thereby offering a high-quality data service. An ensemble of a base layer and the ensemble of an enhancement layer are produced from data content of a broadcast signal. A base layer ensemble processor(130) comprises a base layer service component. The enhancement layer ensemble comprises an enhancement layer service component. Ensemble transfer frames of the basic layer and the enhancement layer are individually generated from the ensemble of the base layer and the ensemble of the enhancement layer. The ensemble transfer frames of the enhancement layer and the base layer are transmitted. The ensemble transfer frame of the enhancement layer comprises service control information.
Abstract:
An apparatus and a method for demodulation in a transmission system are provided to improve reception of an addition layer by using a pilot existing in an addition layer signal. A receiver(210) receives the signal in the form of a transfer frame and the signal comprises a phase reference symbol, a fast information channel and a main service channel. A pilot information storage unit(230) stores location information of a pilot included in the main service channel. A primary channel estimating unit(244) channel-estimates the phase reference symbol and outputs a primary channel estimated value. According to the channel estimated value of the phase reference symbol, the second channel estimating unit(245) channel-estimates the fast information channel and outputs the second channel estimated value. According to the channel estimated value on the basis of the location information of the pilot the fast information channel, a third channel estimating unit(246) channel-estimates the main service channel and outputs the third channel estimated value. According to the primary channel estimated value, the second channel estimated value and the third channel estimated value, a channel equalization part(247) channel-equalizes the signal and outputs a channel-equalized signal.
Abstract:
An apparatus and a method for hierarchical modulation are provided to improve reception performance without affecting a basic layer by inserting a pilot into an additional layer. A basic hierarchical channel encoder(110) generates a basic layer symbol string by encoding the basic layer signal string. A basic hierarchical modulation unit of a hierarchical modulation unit(150) generates the basic hierarchical modulation symbol string by modulating the base hierarchical symbol string. An additional hierarchical channel encoder(120) generates the additional hierarchical symbol string by encoding the additional hierarchical signal string. A pilot insertion unit(130) generates a pilot insertion symbol string by inserting the pilot to the addition hierarchical symbol string. The additional hierarchical modulation unit of the hierarchical modulation unit generates the additional hierarchical modulation symbol string by modulating the pilot insertion symbol string. The symbol mapping unit generates the hierarchical modulation signal by mapping the basic hierarchical modulation symbol string and the additional hierarchical symbol string to a signal space. A normalization unit normalizes the hierarchical modulation signal and generates the normalized hierarchical modulation signal.
Abstract:
A transmission method of a digital broadcasting signal is provided to offer a various high quality service by supplying broadcasting service with higher data transmitting rate than conventional digital broadcasting. A first frame including the first service stream for restoring the service of the first quality is produced(S220). A second frame including the second service stream for restoring the service of the second quality higher than the first quality in addition to the first service stream is produced(S230). The first and the second frame are modulated to the first layer and the second layer(S240). A first transmission frame and the second transmission frame of the enhancement layer are transmitted(S250).