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IP Video:Headend ConsiderationsRobert Schaeffer, PresidentTechnology Planners, LLCrobert.schaeffer@techplanners.comSCTEIEEESenior Consultant to NCTCCable TV Pioneers
What is an IP Headend?“IP Headend” is one of the mostmisused terms in the industry.Most modern headends aredesigned with an IP core.
Input SourcesNetwork DVROTTSatellite Delivery?Off-Air ReceptionHeadendCustomersVOD ServerDirect FeedLocal Origination
Input Formats:Expanded AnalysisProgramResolutionBit PTSATSCE4K (Ultra ariableVariable
Common IP CoreSources w/Gig-E Outputs* (summation switch withineach rack to consolidateinputs and reduce wiring)MultiplexerSwitch*5-75 MB/sSources w/ASI OutputsTranscoderGigE/10G OutputASI to GigEConverterSwitch*5-75 MB/sSwitch*Sources w/Baseband OutputsStream ProcessorEncoderNTSCAd-Insertion
IP Maintenance Challenges:Single Points of FailureSummation SwitchReceiverVBR 20 MB/sMPEG-2ProcessorPlant(IP Delivery)QAM(RF Delivery)Customers
IP Maintenance Challenges:Single Points of FailureSummation SwitchReceiverVBR 20 MB/sMPEG-2ProcessorPlant(IP Delivery)QAM(RF Delivery)Customers
IP Maintenance Challenges:Record Keeping
Contracts:Programmer Requirements & Transport
Transport Examples:DistributionA single format leaves the headendand is transported to differentlocations around an IP network.HubProgram NameHubIP AddressHBO239.19.141.10Discovery239.19.141.14Syfy HD239.19.141.30Fox Sports 1239.19.111.20All hub outputs matchthe source format.HubHubHubHeadend
Transport Examples:DistributionMultiple formats leave the headend and are transported todifferent locations around an IP network.Each Hub site can add/remove it’s own content, ad-insertion,etc. for their unique needs.The headend must maintain the highest level of quality desiredfor each systems.ProgramMPEG-2MPEG-4Ad Zone 1Ad Zone 2HBO239.40.2.12239.38.2.12Syfy ox Sports HubHeadendAd Zone 3HubHub
Transport Examples:Edge HardwareAdd/DropSwitchHubHeadendVideo ProcessingGatewayConditionalAccess SystemLocal Off-AirSwitchEncryption(IP CBR)IP Fiber to the Home (FTTH) ModelDistribution Network
Transport Examples:Edge HardwareAdd/DropSwitchHubHeadendVideo ProcessorLocal Origination(Ad-insertion/ Multiplexing, etc.)Local Off-AirSwitchEdge QAMRF Distribution SystemTraditional CATV Model
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A single format leaves the headend and is transported to different locations around an IP network. Headend Hub Hub Hub Hub Hub All hub outputs match the source format. Transport Examples: Distribution Program Name IP Address HBO 239.19.141.10 Discovery 239.19.141.14 Syfy HD 239.19.141.30 Fox Sports 1 239.19.111.20
