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Satellite distribution of DTV and MobileTV content.

Satellite distribution of DTV and MobileTV content. Presented at: Regional Seminar on DTV Broadcasting, Algiers, December 2007 By: Joost Verbrugge. Contents. Why Digital Terrestrial TV ? The way to Analog Switch Off Single Frequency Networks The primary distribution network

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Satellite distribution of DTV and MobileTV content.

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  1. Satellite distribution of DTV and MobileTV content. Presented at: Regional Seminar on DTV Broadcasting, Algiers, December 2007 By: Joost Verbrugge

  2. Contents • Why Digital Terrestrial TV ? • The way to Analog Switch Off • Single Frequency Networks • The primary distribution network • Why Satellite ? • Application examples • What about Mobile-TV ? • What is mobile TV ? • Technologies and standards • Primary distribution of content for Mobile-TV • Conclusions

  3. Why Digital Terrestrial TV ? • From analog to digital TV transmission: why? • Robustness of the signal • Constant picture quality • New applications come in digital version only: • Interactivity • High definition TV • Mobile TV • More efficient use of spectrum (4-6 times) • Savings in operational cost of network • Competitive with Cable, DTH, TelcoTV (IPTV) • Availibility of low cost Set Top Boxes/receivers.

  4. The way to Analog Switch Off • Some definitions • Standards • DVB-T, ATSC-8VSB, ISDB-T • Digital Switch-0ver (DSO) • The start of digital transmission for public television • Analog Switch-Off (ASO) • The end of analog transmission for public television • Simulcasting • Period of simultaneous analog and digital transmission of the same TV programming • This period allows viewers to convert from analog to digital reception (Set Top Box, decoder, antenna) • Digital Dividend • Savings in spectrum thanks to conversion to digital transmission; can be re-used/sold for new applications. • Remember: dividend comes after investment...

  5. The way to Analog Switch Off Every country has to decide on timing of • Step 1: decide on standard (DVB-T ?) • Step 2: Digital Switch Over plan (DSO) • Including Frequency Plan, SFN/MFN, Capex plan... • Step 3: Decide on Analog Switch Off date (ASO) • Step 4: Build network with 95+% coverage • Simulcasting from DSO to ASO • Step 5: Decide on spectrum allocation after ASO • Step 6: Grant licences/spectrum for new services • Step 7: ASO • start of savings, start of new income • Step 8...88: license new services including mobileTV, HDTV, multiplexes of above, (Wimax), (DAB), ...

  6. Single Frequency Networks • Digital TV using COFDM allows SFN operation • One frequency for all transmitters in large area • Saves on frequencies used • Allows other (better) network topologies • More transmitters with less power to cover area • Requirements for SFN operation: • Each transmitter must radiate: • On the same frequency • At the same time • The same data bits

  7. Single Frequency Networks • Requirements for SFN Operation: implementation • Frequency and Time reference (e.g. GPS) • MIP specification and insertion by ‘SFN adapter’ • Carefull design of network: • Guard time selection defines maximum distances between transmitters • Power levels should avoid intersymbol interference (noise) • Primary distribution network must deliver signal multiplex intact (bit by bit identical) and on time at transmitter. • Local content insertion per SFN area (market) • Allows local advertising in local language • Allows re-use of frequencies in non adjacent areas

  8. Single Frequency Networks Local markets served by several SFN’s SFN 3 SFN 1 SFN 2 DVB-H SFN 3 DVB-H SFN 1 DVB-H SFN 2 DVB-H SFN 3 DVB-H DVB-H SFN 1 SFN 2 DVB-H DVB-H DVB-H SFN 1 SFN 2 DVB-H DVB-H SFN 1 SFN 2 DVB-H DVB-H SFN 1 SFN 2 DVB-H DVB-H

  9. The primary distribution network • What? : • The Primary Distribution Network brings the signal stream (multiplex) to all transmitters in the DTT network. • How? : • Terrestrial : • fibre with SDH, ATM, ...protocols • Private IP based networks • Micro Wave : Point to point links • SATELLITE based primary distribution network • Combination of above (redundancy)

  10. The primary distribution network • Why Satellite ? • Fast and reliable deployment possible • Once ‘on air’, the complete footprint has access to signal • High and constant signal quality over entire footprint • Integrity of original signal stream (SFN !) • No (re)multiplexers in network • Constant delay, no (variable) ‘latency’ (SFN!) • Full redundancy possible • Less or no service interruptions in primary network • No fiber breakdown, no power supplies, no equipment in signal path, ... • Long term committment possible (opex cost control) • Scalable with limited Capex (investment cost)

  11. The primary distribution network • Why (not) Satellite ?: challenges and solutions: • Cost ? (perception of cost...?) • Initial (opex) cost an be an issue (first DSO phase) • Break-even between 50 and 100 sites • Opex cost under control by long term agreements • Save cost by efficient modulation schemes (S ->S2) • Availability ? • New possibilities coming (Arabsat, NileSat, ...) • Ground equipment standardized from multiple vendors

  12. The primary distribution network • Why Satellite: network operator considerations: • Fast network deployment possible • SFN operation easy to implement • Flexibility in network build-up • Additional repeaters can be added when/where needed • No additional (distribution) cost when adding sites. • Full coverage (ASO!) at limited cost • Most equipment centralized at one site (playout/uplink) • Network management & control easier/lower cost • Limited maintenance (transmitter sites only) • Only one service operator

  13. Application examples: Integrated tranceiver possibilities: Small power gap-filler Medium power tranceiver High power transmitter Horizon - Amplifier + 3rd party amplifier without COFDM + 3rd party Transmitter

  14. Application examples: Local markets served by several SFN’s SFN 3 SFN 1 SFN 2 DVB-T SFN 3 DVB-T SFN 1 DVB-T SFN 2 DVB-T SFN 3 DVB-T DVB-T SFN 1 SFN 2 DVB-T DVB-T DVB-T SFN 1 SFN 2 DVB-T DVB-T SFN 1 SFN 2 DVB-T DVB-T SFN 1 SFN 2 DVB-T DVB-T

  15. Application examples: Concentrator Deconcentrator for DVB-T (Newtec-Technology):

  16. Application examples: Local market content insertion

  17. Transmitter site One transport stream includes national and all local channels Sat demod COFDM & up conv Local drop National and local feeds Satellite modulator Encapsulator into TS Ampli & filter Application examples: • Basic primary distribution concept

  18. Management plane Sat3play modem S3Play Hub NM station Application examples: Network monitoring & control Broadcast TS Remote site Sat demod Local drop DVB-H SSPA DVB-H mod Central Hub

  19. What about Mobile-TV ? What is Mobile TV ? Old dream of “Television wherever you go” Casio 1983 Sinclair 1977 RCA 1963 Sony 1982 Seiko 1984 Sony 1990

  20. What about Mobile-TV ? • What is Mobile TV anno 2008? • TV on your mobile • TV in your car • TV on the go (PSP, iPod, etc...)

  21. What about Mobile-TV ? • Dream of “Television wherever you go”Mobile TV at this moment is: • High quality TV for small screens on the move • Broadcast network with indoor coverage • Large number of channels instantly available • Choise of handsets, in-car sets, etc. ... • Personal Phone + TV integrated • Includes ESG, radio, VoD possibilities • Provides regional/local content (?)

  22. What about Mobile-TV ? • Dream of “Television wherever you go”Still some challenges to face/solve: • Agree on standards • Have frequency spectrum available • Combine telecom and TV worlds to realise personal TV handset. • Create working business models • Adjust regulation (must-carry, protection of minors, content rights, etc...) • Build/adapt transmission networks • Increase battery lifetime

  23. What about Mobile-TV ?Technologies and standards: overview Existing • S-DMB • T-DMB • DVB-H • MediaFLO • DAB-IP • ISDB-T Bold = Satellite Delivery • Announced • CMMB • DVB-SH • MBMS • A-VSB • ATSC-M/H • Wimax

  24. What about Mobile-TV ? Additional information on standards and technology: • DVB info on www.dvb.org and www.dvb-h.org • Standards on www.etsi.org • Comparison of bearer technologies by bmco-forum on www.bmcoforum.org • Link budget paper on www.bmcoforum.org • Paper on MediaFLO at www.floforum.org

  25. Delivery of Mobile TV by Satellite What ? • Direct reception of satellite signal by handset • Used in Korea (S-DMB) • Announced in China (CMMB), Europe (DVB-SH) and Middle East (S2M) • All systems use dedicated beams in S-band • All systems need terrestrial transceivers for indoor reception in S-band, synchronized with direct beam. • Tranceivers need signal stream from primary distribution (=satellite) ahead of direct beam.

  26. Delivery of Mobile TV by Satellite • Advantages • Country wide coverage from day 1 • Uniform reception performance • S-band: antenna diversity techniques possible • Disadvantages: • Dedicated satellite needed (+back-up?) • No direct indoor reception possible • Challenges: • Dense terrestrial network needed for indoor reception • S-band: propagation more difficult for indoor than UHF/L • Limited number of handsets available (except Korea?)

  27. Primary distribution for mobile TV What ? • Signal distribution to transmitter towers, gap-fillers, transceivers for mobile TV • Needed with all standards/technologies • Identical stream to all transmitters (SFN) • Mostly Ku-band, C-band also possible Alternatives ? • Terrestrial distribution over fiber • Existing backbones, ATM, IP-networks • Microwave

  28. Primary distribution of mobile TV • Advantages • Rapid deployment/extension of network possible • Most cost-effective for larger number of towers (>100) • Easy implementation of SFN network • Easy network management possible • Disadvantages • (perception of initial) cost • Challenges • Integrated transceiver availability • Local content solutions • Network management solutions • Back-up questions/solutions

  29. Primary Distribution network : • Differences DTT versus Mobile TV : • For DVB-T versus DVB-H: • Technology: almost identical • Network: requirement for indoor coverage !!! • More signal strength needed • More tranceivers/gapfillers needed (deep indoor) • SFN operation required • Satellite requirements for distribution: • Less bandwidth for DVB-H bouquet (5-8 Mbit/sec) • More gapfillers for DVB-H -> smaller receiver dishes

  30. Combine multiple bouquets (=multiplexes) in one saturated transponder DVB-H can be added in second phase Application examples: DVB-T and H combined

  31. Conclusions for Mobile-TV : • Good Mobile-TV reception ... • Means good indoor coverage … • Means many transmitters (1000+…) transceivers gap-fillers • Means Single Frequency Network Operation… • Means exact frequency/timing requirements… • …means Satellite distribution to transmitters !

  32. Conclusions for DVB-T and H: • Digital Terrestrial TV needs large broadcast network with full (outdoor) coverage to allow ASO. (50-500 sites) • Mobile TV needs broadcast network with good outdoor and indoor coverage. (1000+ sites) • Satellite distribution is cost effective for 100+ sites and allows rapid deployment of network • Flexible local content distribution possible • SFN and MFN operation possible • More channels/lower cost with DVB-S2 • Centralized monitoring and control possible • Solutions for different standards, markets.

  33. Satellite distribution of Digital-TV and Mobile-TV content Thank You ! Questions ? Mail to : JVE@newtec.eu

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