DVB Basic training

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1、DigitalVideoNetworksDVBBasictraining11DigitalNetworksAgenda•DVBStandards•TransportStreams•PSIandSITables22DigitalNetworksHistoryDVBDVBDigitalVideoBroadcast(Council)DVBstartedin1992ETSIstandardsETSIEuropeanTelecommunicationsStandardsInstitute3DigitalNetworksDVBStandardsETS300421:Digitalsate

2、llitetransmissionsystemsETS300429:DigitalcabledeliverysystemsETS300468:ServiceInformationforDVB/MPEG-2streamsETS300472:ITU-RSystemBTeletextdeliveryETS300473:DigitalSatelliteMasterAntennaTelevision(SMATV)distributionsystemsETS300743:SubtitlingETS300744:DigitalterrestrialbroadcastingsystemsE

3、TS300748:DigitalMultipointDistributionSystemsatandabove10GHzETS300749:DigitalMultipointDistributionSystemsbelow10GHzETS300800:ReturnchannelsinCATVsystemsETS300801:Network-independentinteractiveprotocolsETS300802:ReturnchannelsinPSTN/ISDNsystemsETS300813:InterfacingtoPDHnetworksETS300814:In

4、terfacingtoSDHnetworksEN50083-9:ProfessionalinterfacesinCATVandSMATVheadendsEN50201:InterfacesinDVBIntegratedReceiversDecoders(IRDs)EN50221:CommonInterfaceforConditionalAccessandotherapplications44DigitalNetworksMPEG/DVBStandardsdescribe:1.Whatabitstreamshouldlooklike.2.Whatshouldthedecode

5、rdowiththedata.5DigitalNetworksTransportStreamBasics66DigitalNetworksMultiplexingTVprogramsinaTransportStreamPrimaryStage(MPEGEncoding)Video1ProgramTV1Audio1EncoderVideo2ProgramSecondaryStageTV2(Multiplexing)Audio2EncoderVideo3ProgramTSTV3MultiplexerModulatorAudio3EncoderVideo4ProgramTV4Au

6、dio4EncoderVideo5ProgramTV5Audio5Encoder77DigitalNetworksTransportStreamVideoPESencoderpacketizerAudioPESencoderpacketizerService1PESTeletextpacketizerVideoPESTransportStreamencoderService2packetizerAudioPESencoderpacketizerMultiplexerPSI&SISectionstables88DigitalNetworksMultiplexingof3TVp

7、rogramsTV1Video1packetVideo1packetAudio1packetTV2Video2packetVideo2packetAudio2packetTV3Video3packetVideo3packetAudio3packetTransportV1V2A1V3V1A2V2V3A3StreamTimeTransportStream:Compressed&multiplexedExample:3TVprograms,eachwithVideoandoneAudiochannel.Therearem