数位电视地面广播标准简介

(DigitalTelevisionTerrestrialBroadcasting;DTTB)ATSCDVB-TISDB-TATSCDVB-TISDB-TATSCDVB-TDisplayDocumentCode:CDOC20031110003PublicationDate:November2003CheckoutMIContheInternet!©2003MarketIntelligenceCenterNovember2003CDOC20031110003...................................................................................1ATSC....................................................................................................3DVB-T..................................................................................................7.............................................................................................................12ii______________________________________________________Advisory&IntelligenceServiceProgram-DisplayNovember2003©2003MarketIntelligenceCenterCDOC20031110003.......................................................................3ATSC................................................................3ATSC........................................................................5........................................................................................5ATSC....................................................................................6DVB-T..............................................................7............................................................................................8(64-QAM).........................................9OFDM................................................................10___________________________________________________________________________1©2003MarketIntelligenceCenterNovember2003CDOC20031110003(databroadcasting)ATSC(AdvancedTelevisionSystemsCommittee)[1]DVB-T(DigitalVideoBroadcasting–Terrestrial)[3]ISDB-T(IntegratedServicesDigitalBroadcasting–Terrestrial)ATSC199612FCC(FederalCommunicationsCommission)199811ATSCDVB-T19972(EuropeanTelecommunicationStandardInstitute;ETSI)BritishDigitalBroadcasting199811DVB-T199710200312ISDB-T2003200310(transmitter)(receiver)(video)(audio)/(A/Dconverter)(videocoding)(audiocoding)2______________________________________________________Advisory&IntelligenceServiceProgram-DisplayNovember2003©2003MarketIntelligenceCenterCDOC20031110003(multiplexer)(videostream)(audiostream)(datastream)(transportstream)(digitalmodulator)(up-converter)(tuner)(digitaldemodulator)(channelcoding)(channeldecoding)()(de-multiplexer)MPEG2[4]DolbyAC3[2]MPEG2MPEG2ATSC(StandardDefinition;SD)(HighDefinition;HD)DolbyAC35.1DVB-TMPEG2ATSC(8VestigialSideBand;8VSB)6MHzNTSCDVB-T(OrthogonalFrequencyDivisionMultiplexing;OFDM)678MHz___________________________________________________________________________3©2003MarketIntelligenceCenterNovember2003CDOC20031110003VideoCodingAudioCodingDigitalModulationMuxChannelCodingVideoAudioDataTransmitterVideoDecodingAudioDecodingDigitalDemodulationDemuxChannelDecodingVideoAudioDataReceiverA/DA/DD/AD/AATSCATSC(functionblock)ATSCSegmentSyncFieldSyncRandomizerRSEncoderInterleaverTrellisEncoderPilotInsertionVSBModulatorRFStageMUX(randomizer)188(bytes)MPEG2(transportpacket)(syncbyte)187(databytes)()PRBS(PseudoRandomBinarySequence)Exclusive-OR4______________________________________________________Advisory&IntelligenceServiceProgram-DisplayNovember2003©2003MarketIntelligenceCenterCDOC20031110003”1””0”10(timingrecovery)10000999100010010(de-randomizer)PRBS()Exclusive-OR-(Reed-Solomonencoder;RSencoder)187(MPEG2)20parity18720710RSRSRS(207,187,t=10)RS(randomnoise)(bursterror)RSRS(interleaver)(de-interleaver)ATSC(convolutionalinterleaving)52(branches)FIFO4___________________________________________________________________________5©2003MarketIntelligenceCenterNovember2003CDOC20031110003ATSC4Bytes2x4Bytes50x4Bytes12351521235152FIFO51x4BytesRSATSC(trellisencoder)(bit)3/2(coderate)2/3(8levels):{±1,±3,±5,±7}DDDX2X1Y2Y1Z2Z1Z0111+7110+5101+3100+1011-1010-3001-5000-7Z2Z1Z0RR6______________________________________________________Advisory&IntelligenceServiceProgram-DisplayNovember2003©2003MarketIntelligenceCenterCDOC20031110003ATSC8VSBVSBNTSC(luminance)VSB8VSB(symbol)(mapping)(dataframe)ATSC(fields)313(segments)(fieldsync)832(segmentsync)(channelestimation)(carrierrecovery)(pilottone)VSBRFATSC6MHz19.28MbpsATSC313Segments313SegmentsFieldSync#1FieldSync#2SegmentSyncData+FECData+FEC828Symbols4___________________________________________________________________________7©2003MarketIntelligenceCenterNovember2003CDOC20031110003DVB-TDVB-TMPEG2(inputstream)DVB-TOuterCoderOuterInterleaverRandomizerInnerCoderInnerInterleaverMapperOuterCoderOuterInterleaverRandomizerInnerCoderFrameAdaptationOFDMFrontEndpilotsDVB-TATSCPRBS(outercoder)RS188(MPEG2)16parity1882048RSRSRS(204,188,t=8)DVB-T(outerinterleaver)ATSCDVB-T12(branches)FIFO17ATSCDVB-T(RS)(innercoding)8______________________________________________________Advisory&IntelligenceServiceProgram-DisplayNovember2003©2003MarketIntelligenceCenterCDOC2003111