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Building Blocs for Digital Terrestrial TV – DVB-T/T2

Building Blocs for Digital Terrestrial TV – DVB-T/T2. Focus on Regionalization David Mouen January 27, 2011, Kiev. Agenda. Introduction - Thomson Video Network overview Digital Terrestrial TV: New Services and Benefits Multiplex Generation, customization and transport

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Building Blocs for Digital Terrestrial TV – DVB-T/T2

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  1. Building Blocs for Digital Terrestrial TV – DVB-T/T2 Focus on Regionalization David Mouen January 27, 2011, Kiev

  2. Agenda Introduction - Thomson Video Network overview Digital Terrestrial TV: New Services and Benefits Multiplex Generation, customization and transport DTTV System Key components Conclusion

  3. Thomson Video Networks throughout the Media Chain CONTENT TRANSMISSION CONTENT RECEPTION CONTENT PRODUCTION CONTENT DISTRIBUTION National programming Local programming Live events Playout center Network operation Fixed reception Terrestrial broadcasting Digital TV Headend Post-production Studio Mobile reception Thomson Video Networks provides innovative video compression and content processingsolutions at the digital headend, all along with a competitive set of professional servicesthat enable network operators and broadcasters to deliver the best HD, SD, Web and Mobile TV experience.

  4. Thomson Video Networks at a glance PTS Key DTTV Customers Kenya DTTV PTS • 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

  5. Digital Terrestrial TV: New Services and Benefits Content Customization Multiple Services over each frequency Better Picture / Audio Quality Saving Frequencies • Multi languages per video • Thematic channels • Regional channels • Regional switchover • Ad Insertion • Mix of TV, radio, data • 14 SD (T), 6 HD (T2) • Sharing Tx costs • Opportunity for other usage (mobile, telecommunications, radio, …) • Digital video quality • High quality audio (digital codecs, 2.0, 5.1) • Improved reception • Increase coverage Interactive Services High Definition Offering Pay TV • Electronic Program Guide • Teletext, Subtiltles • News, Games, … • Live, push VOD

  6. Challenge to Face: How to Build, Customize and Distribute DTTV Multiplexes? Multiplex: The bitstream delivered by the headend, modulated by the DVB-T/T2 transmitter, …), demodulated, descrambled, decoded by the STB or the TV. ? Channel #1 Playout Center Channel #2 Playout Center 0100110111001011011 6, 7 or 8 MHz Transmitters Channel #N Playout Center DTTV STB DTTV TV 7

  7. Example of Multiplexes – DVB-T / DVB-T2 SD/HD Encoders Statistical Multiplexing Dynamic bitrate allocation among a pool of encoders sharing a frequency. Up to +30% efficiency. Stuffing down to 100 Kbps DVB-T 24,882 Mb/s 7 SD MPEG-2 DVB-T 24,882 Mb/s 14 SD MPEG-4 DVB-T2 40,210 Mb/s 6 HD MPEG-4 DVB-T2 40,210 Mb/s 23 SD MPEG-4

  8. Digital Terrestrial DVB-T/T2 System Overview National Head-end Multiplex Generation Telecom Telecom Telecom Telecom Regional Head-end Multiplex Customization Regional Head-end Multiplex Customization Regional Head-end Multiplex Customization Regional Head-end Multiplex Customization Transmitters Multiplex Broadcasting Transmitters Multiplex Broadcasting Transmitters Multiplex Broadcasting Transmitters Multiplex Broadcasting Broadcasters Playout Centers 24/7 local insertion Live to live National / Regional switch Advertising substitution (Ad Insert) 9

  9. National Headend - Architecture Reception Encoding Multiplexing Distribution GPS SDI Router QOS Monitoring RD1002 IRD IP or ASI Router ViBE HD Encoder QOS Descrambler From Playout Centers NetProcessor Multiplexer DVB-S2 Modulation ViBE SD Encoder NetProcessor Network Adaptor Service Multiplexing Scrambling SFN adaptation DVB-T2 adapt Data Insertion To regions or transmitters Telecom Backbone IP Router Amethyst Samless Switch Sapphire MPEG Video Servers Conditional Access servers NetProcessor Network Adaptor XMS Management DataCasting: EPG generator IP, PDH, SDH µW, Fiber IP Encaps ITV Carousel 10 Management

  10. regionalization: 24/7 local insertion Regional Headend ViBE Encoders NetProcessor Multiplexer GPS in National head-end Encoder: MPEG-4 encoding of local channels (Statmux if more than 2) • Multiplexer: • Remultiplexing • Scrambling • SFN or DVB-T2 adaptation • IP or ASI delivery Encoder: Encoding of national channels (Statistical multiplexing)

  11. regionalization: live to live Nat. / Region. switcH Regional Headend end start BW I I S1 National S1 National S1 Regional S2 S2 S2 S3 S3 S3 ViBE Encoder National Headend SCTE35 S4 S4 S4 Broadcaster Time SDI GPS in ViBE Encoder NetProcessor Multiplexer • Switch triggers • SCTE104 over SDI • SCTE104 over IP • Analog cue tones • GPI • Encoder - on trigger: • Digital cue tones insertion (SCTE35 tables) • I frame generation • 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 • Witheven-idcapability to select regions Encoder For quality optimization the service to substitute is VBR except during the switch. I Frame accurate solution thanks to I frame generation on splice points + SCTE35 commands. • Multiplexer– complementary process • Scrambling, SFN or DVB-T2 adaptation

  12. 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 Regional Headend National Headend GPS in Broadcaster SDI ViBE Encoder NetProcessor Multiplexer Sapphire Splicer / Ad Server • Switch triggers • SCTE104 over SDI • SCTE104 over IP • Analog cue tones • GPI • Encoder - on trigger: • Digital cue tones insertion (SCTE35 tables) • I frame generation • Multiplexer– complementary process • Scrambling • SFN or DVB-T2 adaptation • IP or ASI delivery I

  13. Secure and efficient transport of SFN multiplexes • RD1002 - Demo+ Descrambler • Demodulation, descrambling of protected free to air services. Agg + DVB-S2 mod • DVB-S2 multi TS modulation • 2 or 3 DVB-T multiplex in 1 transponder Head-end Telecom Network • Amethyst - Smart switch • Delay compensation. • Deepanalysys • Seamlessswitch of MFN & SFN multiplexes • NetProcessor • Telecom Network Adaptor • Provide transparent bit accurate transport over backbone. Transmitter site

  14. Key components for DVB-T/T2 headend systems NetProcesor ViBE • Multiplexer / Splicer • Multiplexer / remultiplexer, PSI/SI processor • Seamless splicing (SD/HD, MPEG-2/4) • Transrating • Scrambling • SFN adaptation, DVB-T2 adaptation Sapphire XMS • Management SW • Device configuration and monitoring. Handle service resiliency (redundancy) • Control the national and regional headends, monitor the transmitters • Control the QOS with dedicated probes. • Scale from small to very large systems . • Ad server / Splicer • Ad Insertion (SCTE-35/30 compliant) • GOP / frame accurate seamless splicing • Frame-accurate ingest of advertising clips (MPEG-2, H.264, SD, HD) • MPEG Encoder • Must performs superior video encoding at very low bitrate (SD/HD MPEG-2/4) • Audio codecs: AAC, Dolby 2.0, 5.1, … • Logo in, teletext processing, … • SCTE 104 and SCTE-35 compliant (digital cue tone insertion)

  15. 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, …

  16. THANK YOU

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