ITU-T J.118 (05 2000) (英) Access systems for interactive……

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1、INTERNATIONALTELECOMMUNICATIONUNIONJ.118TELECOMMUNICATION(05/2000)STANDARDIZATIONSECTOROFITUSERIESJ:TRANSMISSIONOFTELEVISION,SOUNDPROGRAMMEANDOTHERMULTIMEDIASIGNALSInteractivesystemsfordigitaltelevisiondistributionAccesssystemsforinteractiveservicesonSMATV/MATVnetworksITU-TRecommendationJ.118(Forme

2、rlyCCITTRecommendation)ITU-TJ-SERIESRECOMMENDATIONSTRANSMISSIONOFTELEVISION,SOUNDPROGRAMMEANDOTHERMULTIMEDIASIGNALSGeneralRecommendationsJ.1–J.9Generalspecificationsforanaloguesound-programmetransmissionJ.10–J.19Performancecharacteristicsofanaloguesound-programmecircuitsJ.20–J.29Equipmentandlinesus

3、edforanaloguesound-programmecircuitsJ.30–J.39Digitalencodersforanaloguesound-programmesignalsJ.40–J.49Digitaltransmissionofsound-programmesignalsJ.50–J.59CircuitsforanaloguetelevisiontransmissionJ.60–J.69Analoguetelevisiontransmissionovermetalliclinesandinterconnectionwithradio-relaylinksJ.70–J.79D

4、igitaltransmissionoftelevisionsignalsJ.80–J.89AncillarydigitalservicesfortelevisiontransmissionJ.90–J.99OperationalrequirementsandmethodsfortelevisiontransmissionJ.100–J.109InteractivesystemsfordigitaltelevisiondistributionJ.110–J.129TransportofMPEG-2signalsonpacketisednetworksJ.130–J.139Measuremen

5、tofthequalityofserviceJ.140–J.149DigitaltelevisiondistributionthroughlocalsubscribernetworksJ.150–J.159Forfurtherdetails,pleaserefertothelistofITU-TRecommendations.ITU-TRecommendationJ.118AccesssystemsforinteractiveservicesonSMATV/MATVnetworksSummaryThisRecommendation"Accesssystemsforinteractiveser

6、vicesonSMATV/MATVnetworks"coversthedefinitionoftheframingstructure,channelcodingandmodulationfortheprovisionofanInteractionchannelthroughoutSMATV/MATVnetworksfromtheusertotheSMATV/MATVHead-end.ThisRecommendationdefinestwocurrenttechnologicalalternativesfortheinteractiveserviceprovisioninSMATV/MATVn

7、etworksaccordingtoabandwidthdependentclassification.Inparticular,thecablebasedsolutionisfittedwhenbroadbandapplicationsareconcernedwhiletheMasterLinkLowRateTDMAissuitedfornarrow-bandapplications.SourceITU-T