Abstract:
본 발명은 ATSC-M/H 방송 서비스 송수신 시스템에 관한 것으로, ATSC-M/H 방송 서비스 송출 시스템은 방송 데이터 수신부, ATSC-M/H 전송 프레임 멀티플렉서, ATSC-M/H 전송 프레임 송출부를 포함한다. 상기 방송 데이터 수신부는 신규 서비스에 대한 방송 데이터 및 부가 정보를 수신한다. 상기 ATSC-M/H 전송 프레임 멀티플렉서는 상기 방송 데이터 및 상기 부가 정보를 이용하여 상기 신규 서비스의 앙상블(Ensemble)을 구성하는 ATSC-M/H 전송 프레임을 생성한다. 상기 ATSC-M/H 전송 프레임 송출부는 상기 생성된 ATSC-M/H 전송 프레임을 송출한다. 이때, 상기 ATSC-M/H 전송 프레임 멀티플렉서는 상기 부가 정보를 상기 ATSC-M/H 전송 프레임의 일반 데이터 영역에 기록하는 것을 특징으로 한다.
Abstract:
The present invention relates to a multi-mode digital radio broadcasting receiving apparatus for receiving, decoding, and outputting a broadcasting signal according to various broadcasting standards, and a method thereof. A main controller controls a received broadcasting signal by outputting a control command and an operation code regarding a broadcasting standard to be received, and performs decoding using a CODEC suitable for the received broadcasting signal so that the broadcasting signal according to the various broadcasting standards may be received and output.
Abstract:
PURPOSE: A method for securing TV white space (TVWS) information using a digital television (DTV) broadcasting network and a TVWS terminal device thereof are provided for a digital television broadcasting station to transmit the information of TVWS through a broadcasting network. CONSTITUTION: A DTV receiving device (23) receives the TVWS information of TVWS transmitted from a DTV broadcasting station. A TVWS managing module (25) determines a usable channel from location information, information of the possibility of the use of each channel and the information of allowable output power of each channel included in the TVWS information received through the DTV receiving device. The DTV receiving device, the TVWS managing module and a TVWS modem are modulated in the form of one chip. [Reference numerals] (110) Network
Abstract:
PURPOSE: A dynamic transmission parameter reset method in an ATSC-M/H(advanced television systems committee-mobile/handheld) multiplexer is provided to solve broadcasting distortion problems generated by shortage of transmission rates in a mobile service adding process. CONSTITUTION: An ATSC-M/H multiplexer determines whether a transmission rate of a legacy ATSC exceeds maximum transmission rates(S250). When the transmission rate of the legacy ATSC exceeds acceptable maximum transmission rates, an ATSC-M/H multiplexer reduces the whole number of M/H groups in an M/H frame(S300). The ATSC-M/H multiplexer reduces the number of the M/H groups according to the calculated number of slots in a sub frame of the M/H frame. The ATSC-M/H multiplexer resets a transmission parameter of a control channel according to the reduced M/H group number(S350). [Reference numerals] (AA) Start; (BB,CC,FF,HH) No; (DD,EE,GG,II) Yes; (JJ) End; (S100) Legacy ATSC and M/H data load; (S150) Legacy ATSC R_L calculation; (S200) Each Parade R_m calculation; (S250) R_L>R_Lmax?; (S300) Decrease in TNoG(mathematical equation 1); (S350) Reset(TPC and FIC update); (S400) Packet timing and PCR control; (S450) M/H preprocessing; (S500) End?; (S550) TNoG conversion?; (S600) C==Cth?; (S650) Increase in TNoG(mathematical equation 2); (S700) C=0; (S750) C=C+1
Abstract:
PURPOSE: A frame synchronization device of a digital broadcast receiver and a method thereof are provided to quickly and accurately synchronize frames. CONSTITUTION: A correlation operation unit(141) operates a correlation value between reference cells for each receiving symbol. The correlation operation unit operates the correlation value using a phase difference between reference cells and a phase difference between reference cells in at least one symbol. The reference cells are located in a first symbol of one frame. An AFS(Alternative Frequency Switching) reference cell exists in at least one symbol. A synchronization unit(142) synchronizes frames using a symbol with the maximum value among correlation values which are operated per each symbol.
Abstract:
PURPOSE: A fast synchronization, a digital broadcasting system and an OFDM method thereof are provided to performing a frame synchronization and an integer frequency error after symbol synchronization. CONSTITUTION: An OFDM symbol synchronization and a fraction time frequency error estimation operate. A FFT(Fast Fourier Transform) operates. A correlation diagram, an existing tone on the pilot location of a receive symbol with all possible integrals and of an OFDM symbol pilot and possible are obtained among one of the OFDM signal frame at all symbols(S40g). An index of an integral frequency error that has a maximum correlation diagram and the index of a pertinent symbol estimate respectively a frame synchronization and an integral error(S40l).