IP Video:Headend Considerations
Robert Schaeffer, PresidentTechnology Planners, [email protected]
SCTEIEEESenior 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.
Headend
Direct Feed
VOD Server
Off-Air Reception
Satellite Delivery
?
OTTNetwork DVR
Local Origination
Customers
Input Sources
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
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
IP Maintenance Challenges:Single Points of Failure
Processor
Summation SwitchReceiver
QAM
PlantCustomers
VBR 20 MB/sMPEG-2
(IP Delivery)
(RF Delivery)
IP Maintenance Challenges:Single Points of Failure
Processor
Summation SwitchReceiver
QAM
PlantCustomers
VBR 20 MB/sMPEG-2
(IP Delivery)
(RF Delivery)
IP Maintenance Challenges:Record Keeping
Contracts:Programmer Requirements & Transport
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
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
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
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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