ITU-T J.121 (02 2002) (英) Quality control protocol for webcasting

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1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TJ.121TELECOMMUNICATION(02/2002)STANDARDIZATIONSECTOROFITUSERIESJ:CABLENETWORKSANDTRANSMISSIONOFTELEVISION,SOUNDPROGRAMMEANDOTHERMULTIMEDIASIGNALSInteractivesystemsfordigitaltelevisiondistributionQualitycontrolprotocolforwebcastingITU-TRecommendationJ.12

2、1ITU-TJ-SERIESRECOMMENDATIONSCABLENETWORKSANDTRANSMISSIONOFTELEVISION,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

4、–J.79DigitaltransmissionoftelevisionsignalsJ.80–J.89AncillarydigitalservicesfortelevisiontransmissionJ.90–J.99OperationalrequirementsandmethodsfortelevisiontransmissionJ.100–J.109InteractivesystemsfordigitaltelevisiondistributionJ.110–J.129TransportofMPEG-2signalsonpacketisednetworksJ.130–J.1

5、39MeasurementofthequalityofserviceJ.140–J.149DigitaltelevisiondistributionthroughlocalsubscribernetworksJ.150–J.159IPCablecomJ.160–J.179MiscellaneousJ.180–J.199ApplicationforInteractiveDigitalTelevisionJ.200–J.209Forfurtherdetails,pleaserefertothelistofITU-TRecommendations.ITU-TRecommendation

6、J.121QualitycontrolprotocolforwebcastingSummaryThisRecommendationdefinesprotocolsbetweenaserverandaclientinordertodistributesoundandtelevisionprogramsbyJ.120,i.e.perform"webcasting",overageneralIPnetwork,whichisanon-QoSguaranteednetworkwheredataerrororpacketlossesmayoccur.Theuseoftheseprotoco

7、lsresultsinanimprovementofquality.Aschemeisprovidedwhereinaqualityreportissentfromaclienttotheserver,andtheserverperformsoptimumdatadistributionsaccordingtotheclient'sreport.ThisRecommendationdefinesthekindsofparametersthataclientshouldreport