BUILDING BLOCS FOR DIGITAL
TERRESTRIAL TV – DVB-T/T2
FOCUS ON REGIONALIZATION
DAVID MOUEN
JANUARY 27, 2011, KIEV
4/8/2015
AGENDA
INTRODUCTION - THOMSON VIDEO NETWORK OVERVIEW
DIGITAL TERRESTRIAL TV: NEW SERVICES AND BENEFITS
MULTIPLEX GENERATION, CUSTOMIZATION AND TRANSPORT
DTTV SYSTEM KEY COMPONENTS
CONCLUSION
2
THOMSON VIDEO NETWORKS THROUGHOUT THE MEDIA CHAIN
CONTENT PRODUCTION
CONTENT DISTRIBUTION
CONTENT TRANSMISSION
CONTENT RECEPTION
National
programming
Live events
Local
programming
Playout center
Network operation
Fixed reception
Terrestrial
broadcasting
Studio
Post-production
Digital TV Headend
Mobile reception
Thomson Video Networks provides innovative video compression and content
processing solutions at the digital headend, all along with a competitive set of
professional services that enable network operators and broadcasters to deliver
the best HD, SD, Web and Mobile TV experience.
4/8/2015
THOMSON VIDEO NETWORKS AT A GLANCE
15 years of innovation and continuous service to deliver leading-edge compression and network
systems to network operators and broadcasters worldwide
Worldwide leader in HD, SD, Mobile TV head-end systems
Significant global presence to ensure close customer proximity
~400 employees with R&D center (200 employees), manufacturing location and multiple sales and services offices
Trusted supplier to hundreds of customers around the world
Over 25,000 active HD, SD and Mobile TV channels deployed worldwide
Culture of sustained innovation and technology
Key DTTV Customers
Conflans (Paris), France
Sales & Bids
Southwick, MA
Sales
Field Services
Miami, FL
Sales
Field services
Brest, France
Operations
Beijing
Sales
Field services
Rennes, France, HQ
R&D - Marketing
Sales - Factory
Singapore
Sales
Field services
Sao Paulo
Sales
Field services
PTS
PTS
4/8/2015
Kenya
DTTV
DIGITAL TERRESTRIAL TV: NEW SERVICES AND BENEFITS
Multiple Services over
each frequency
•Mix of TV, radio, data
•14 SD (T), 6 HD (T2)
•Sharing Tx costs
High Definition
Better Picture / Audio
Quality
•Digital video quality
•High quality audio
(digital codecs, 2.0, 5.1)
•Improved reception
•Increase coverage
Content
Customization
•Multi languages per video
•Thematic channels
•Regional channels
•Regional switchover
•Ad Insertion
Interactive Services
Offering Pay TV
•Electronic Program Guide
•Teletext, Subtiltles
•News, Games, …
•Live, push VOD
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Saving Frequencies
•Opportunity for other
usage (mobile,
telecommunications,
radio, …)
CHALLENGE TO FACE: HOW TO BUILD, CUSTOMIZE AND
DISTRIBUTE DTTV MULTIPLEXES?
Channel #1
Playout Center
Channel #2
Playout Center
Multiplex: The bitstream delivered
by the headend, modulated by the
DVB-T/T2 transmitter, …),
demodulated, descrambled, decoded
by the STB or the TV.
0100110111001011011
6, 7 or 8 MHz
Channel #N
Playout Center
7
Transmitters
DTTV STB
DTTV TV
7
EXAMPLE OF MULTIPLEXES – DVB-T / DVB-T2
MPEG-4 HD Service (Kb/s)
HD Video
6 000
Stereo Audio - E AAC 5.1
256
Teletext
130
Subtiltle
80
Statistical Multiplexing
Dynamic bitrate allocation
among a pool of encoders
sharing a frequency.
Up to +30% efficiency.
TOTAL HD Service
6 466
SD/HD Encoders
MPEG-2 SD Service (Kb/s)
SD Video
3 200
Stereo Audio - HE AAC
96
Teletext
75
Subtiltle
TOTAL SD Service
3 371
MPEG-4 SD Service (Kb/s)
SD Video
1 500
Stereo Audio - HE AAC
128
Teletext
80
DVB Subtiltle
TOTAL SD Service
1 708
Common Data (Kb/s)
PSI (PAT, PMT, CAT)
200
SI (NIT, SDT, TOT/TDT, MIP)
20
SI EIT pf + EIT schedule
300
CA ECM
200
CA EMM
100
Software Download
30
TOTAL Common Data
DVB-T
24,882 Mb/s
7 SD MPEG-2
8
Stuffing
850
down to 100 Kbps
DVB-T
24,882 Mb/s
14 SD MPEG-4
DVB-T2
40,210 Mb/s
23 SD MPEG-4
DVB-T2
40,210 Mb/s
6 HD MPEG-4
DIGITAL TERRESTRIAL DVB-T/T2 SYSTEM OVERVIEW
National Head-end
Broadcasters
Playout Centers
Multiplex Generation
Telecom
Telecom
Telecom
Telecom
Transmitters
Regional Head-end
Transmitters
Multiplex
Regional
Head-end
Multiplex
Customization
Transmitters
Broadcasting
Multiplex
Regional
Head-end
Multiplex
Customization
Transmitters
Broadcasting
Multiplex
RegionalCustomization
Head-end
Multiplex
Broadcasting
Multiplex
Multiplex Customization
Broadcasting
24/7 local
insertion
9
Live to live National
/ Regional switch
Advertising substitution
(Ad Insert)
9
NATIONAL HEADEND - ARCHITECTURE
Reception
Encoding
Multiplexing
Distribution
GPS
SDI
Router
RD1002 IRD
From
Playout
Centers
QOS
Monitoring
IP or ASI Router
Descrambler
NetProcessor
Multiplexer
Service Multiplexing
Scrambling
SFN adaptation
DVB-T2 adapt
Data Insertion
IP Router
Sapphire
MPEG Video Servers
Conditional Access
servers
XMS
Management
DataCasting:
EPG generator
IP Encaps
ITV Carousel
Management
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QOS
DVB-S2
Modulation
ViBE
SD Encoder
NetProcessor
Network Adaptor
Telecom
Backbone
ViBE
HD Encoder
Amethyst
Samless Switch
To regions or
transmitters
NetProcessor
Network Adaptor
IP, PDH, SDH
µW, Fiber
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REGIONALIZATION: 24/7 LOCAL INSERTION
Regional Headend
ViBE
Encoders
NetProcessor
Multiplexer
GPS in
National head-end
Encoder: Encoding of
national channels
(Statistical multiplexing)
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Encoder: MPEG-4 encoding of local
channels (Statmux if more than 2)
Multiplexer:
•Remultiplexing
•Scrambling
•SFN or DVB-T2 adaptation
•IP or ASI delivery
REGIONALIZATION: LIVE TO LIVE NAT. / REGION. SWITCH
Regional Headend
I
end
BW
S1 National
National Headend
Broad
caster
ViBE Encoder
SCTE35
I
start
S1 Regional
S1 National
S2
S2
S2
S3
S3
S3
S4
S4
S4
Time
GPS in
SDI
ViBE Encoder
NetProcessor Multiplexer
Encoder - on trigger:
•Digital cue tones insertion
(SCTE35 tables)
•I frame generation
Frame accurate solution thanks to I
frame generation on splice points +
SCTE35 commands.
12
I
Switch triggers
•SCTE104 over SDI
•SCTE104 over IP
•Analog cue tones
•GPI
Multiplexer - On digital cue tones detection:
• seamless splice from the national to the
regional service and reverse (a few s
latency) - Gop accurate OR
•Service subsitution (50 ms, not seamless)
•Service must be in clear
•With even-id capability to select regions
Encoder
For quality optimization the service to
substitute is VBR except during the
switch.
•Multiplexer – complementary process
•Scrambling, SFN or DVB-T2 adaptation
REGIONALIZATION: ADVERTISING SUBSTITUTION (AD INS)
Splice / Ad Server - On digital cue
tones detection:
•Frame accurate seamess splice,
replacing live content by ad clips
•MPEG-2/4 SD/HD CBR
•Services must be in clear
National Headend
Broad
caster
GPS in
SDI
ViBE Encoder
Sapphire
Splicer / Ad Server
Encoder - on trigger:
•Digital cue tones insertion
(SCTE35 tables)
•I frame generation
I
Switch triggers
•SCTE104 over SDI
•SCTE104 over IP
•Analog cue tones
•GPI
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Regional Headend
NetProcessor Multiplexer
•Multiplexer – complementary process
•Scrambling
•SFN or DVB-T2 adaptation
•IP or ASI delivery
SECURE AND EFFICIENT TRANSPORT OF SFN MULTIPLEXES
RD1002 - Demo+ Descrambler
•Demodulation, descrambling of
protected free to air services.
Agg
+
DVBS2
mod
DVB-S2 multi TS modulation
•2 or 3 DVB-T multiplex in 1 transponder
Head-end
Telecom Network
NetProcessor
Telecom Network Adaptor
•Provide transparent bit
accurate transport over
backbone.
Transmitter site
Amethyst - Smart switch
•Delay compensation.
•Deep analysys
•Seamless switch of MFN &
SFN multiplexes
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KEY COMPONENTS FOR DVB-T/T2 HEADEND SYSTEMS
MPEG ENCODER
ViBE
MULTIPLEXER / SPLICER
NetProcesor
Must performs superior video encoding
at very low bitrate (SD/HD MPEG-2/4)
Multiplexer / remultiplexer, PSI/SI
processor
Audio codecs: AAC, Dolby 2.0, 5.1, …
Seamless splicing (SD/HD, MPEG-2/4)
Logo in, teletext processing, …
Transrating
SCTE 104 and SCTE-35 compliant
(digital cue tone insertion)
Scrambling
SFN adaptation, DVB-T2 adaptation
Sapphire
AD SERVER / SPLICER
MANAGEMENT SW
XMS
GOP / frame accurate seamless splicing
Device configuration and monitoring.
Handle service resiliency (redundancy)
Frame-accurate ingest of advertising
clips (MPEG-2, H.264, SD, HD)
Control the national and regional
headends, monitor the transmitters
Ad Insertion (SCTE-35/30 compliant)
Control the QOS with dedicated probes.
Scale from small to very large systems .
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CONCLUSION
THE BEST PICTURE QUALITY AT LOW BITRATE IS A MUST
BW on DTTV network is very expensive, every Kbps must be used with efficiency.
REGIONALIZATION IS KEY FOR DTTV COMPETITION VERSUS DTH, IPTV, CABLE BUILDING BLOCS EXIST AND PROVIDES FLEXIBILITY, EFFICIENCY & COST
EFFECTIVENESS
Local encoding, live to live switch, ad insertion, SCTE35/30 compliant.
Optimized & secure transport of multiplexes over satellite (DVB-S2 multi TS)
FUTURE PROOF SYSTEM DESIGN & INTEGRATION REQUIRED TO FACE NEW
FEATURES TO OFFER, INCREASE OF REGIONS AND OTHER EVOLUTIONS
Scalable solutions required (features / sizing)
Flexible management SW, from contribution links to Transmitters
SFN & T2 adaptation, VBR, Ad Insertion, integrated Teletext to DVB sub, …
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THANK YOU
4/8/2015