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IP Video:Headend Considerations
Robert Schaeffer, PresidentTechnology Planners,
[email protected]
SCTEIEEESenior Consultant to NCTCCable TV Pioneers
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What is an IP Headend?
“IP Headend” is one of the mostmisused terms in the
industry.
Most modern headends aredesigned with an IP core.
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Headend
Direct Feed
VOD Server
Off-Air Reception
Satellite Delivery
?
OTTNetwork DVR
Local Origination
Customers
Input Sources
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Input Formats:Expanded Analysis
Program Resolution Bit RateFormat
MPTS/SPTS
Format
A HD Constant MPTS MPEG-4
B HD Variable SPTS MEPG-4
C SD Constant SPTS MPEG-2
D SD Variable SPTS ATSC
E 4K (Ultra HD) Variable SPTS HEVC
F HD CappedVariable
MPTS MPEG-2
G SD Variable MPTS ATSC
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Common IP Core
Transcoder Multiplexer
Stream Processor Ad-Insertion
GigE/10G Output
Sources w/Gig-E Outputs
Sources w/ASI Outputs
ASI to GigEConverter
Sources w/Baseband Outputs
Encoder
Switch*
* (summation switch withineach rack to consolidateinputs and
reduce wiring)
Switch*
Switch*
5-75 MB/s
5-75 MB/s
NTSC
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IP Maintenance Challenges:Single Points of Failure
Processor
Summation SwitchReceiver
QAM
PlantCustomers
VBR 20 MB/sMPEG-2
(IP Delivery)
(RF Delivery)
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IP Maintenance Challenges:Single Points of Failure
Processor
Summation SwitchReceiver
QAM
PlantCustomers
VBR 20 MB/sMPEG-2
(IP Delivery)
(RF Delivery)
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IP Maintenance Challenges:Record Keeping
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Contracts:Programmer Requirements & Transport
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A single format leaves the headendand is transported to
differentlocations around an IP network.
Headend
Hub Hub
Hub
Hub
Hub
All hub outputs matchthe 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
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Multiple 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.
Hub
HubHub Hub
Headend
Program MPEG-2 MPEG-4 Ad Zone 1 Ad Zone 2 Ad Zone 3
HBO 239.40.2.12 239.38.2.12
Syfy HD 239.40.2.12 239.38.2.12 239.19.6.12 239.19.8.12
Discovery 239.40.2.18 239.38.2.18 239.19.6.18 239.19.8.18
239.23.22.18
Fox Sports 1 239.40.6.60 239.19.6.60 239.23.22.60
Transport Examples:Distribution
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Hub
Headend
IP Fiber to the Home (FTTH) ModelDistribution Network
Add/Drop
Switch
Video ProcessingGateway
Encryption
ConditionalAccess System
Switch
(IP CBR)
Local Off-Air
Transport Examples:Edge Hardware
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Hub
Headend
Traditional CATV ModelRF Distribution System
Add/Drop
Switch
Edge QAM
Video Processor Local Origination
Switch
(Ad-insertion/ Multiplexing, etc.)
Local Off-Air
Transport Examples:Edge Hardware
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We Are Video!Technology Planners, LLC244 West Pioneer RoadP.O.
Box 1003Fond du Lac, Wisconsin 54936-1003920-923-1034Fax:
[email protected]
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