Different Technologies and Delivery Systems of Digital TV and

Mohsen GHOMMAM MALEK ( Chief Engineer, Office National de Telediffusion ONT, Tunisia)



1. Intoduction 2. Image formats & definitions 3. Broadcasting compression norms 4. Different delivery solutions for TV broadcasting 5. Different delivery solutions for 6. Conclusion


 There are many standards for image, compression, delivery systems, etc..  Most Next generations of digital TV standards are completed and can be launched in the future  Let’s discover together the existing systems and the new ones and their applications


2-IMAGE FORMATS & DEFINITIONS (1) Profiles HDTV, SDTV and Mobile TV (pixels/lines)

1920x1080 (16/9)

1280x720 (16/9)

720x(480/576) (4/3)


Typ. 320x240

Handset (LDTV) Vehicular SDTV HDTV 720p HDTV /

Compared to TV (SDTV)  4 times less is required to display a TV image on a handset (LDTV)  3 to 6 times more bandwidth is required to display a High Definition image

4 3-BROADCASTING COMPRESSION NORMS MPEG2 used mainly in SDTV MPEG4 AVC can used for Mobile TV, standard TV and mainly HDTV: 50% of compression gain compared to MPEG2  Don’t forget MPEG4 SVC: enhancement of MPEG4 AVC and compatible with it (under study) Data rate needed and planned for different formats



 Names of MPEG4 AVC /H264 ( History)


 Licence Fees for MPEG-4-AVC  In 2003, MPEG-LA announced participation fees for over-the- air free to air broadcasts using MPEG-4 AVC: No royalties for markets of 100,000 or fewer households For markets of greater than 100,000 households, $10,000 per year per local market service.

 BUT In 2008, there are two options for free to air broadcasters : one payment of $2,500 per encoder Payment of $10,000 each year for any number of encoders per legal entity. The less expensive option depends on the way the individual broadcaster operates


4-Different delivery solutions for TV broadcasting

 The main delivery solutions for TV broadcasting:

•Terrestrial •Satellite •Cable •IPTV •Mobile TV

8 4-1-Terrestrial TV broadcasting (1)  The main digital standards are : • ATSC ( ) • ISDB-T (Japan, Brazil) • DMB-T/H ( China) • DVB-T ( Europe)


4-1-Terrestrial TV broadcasting (2)  Comparison between main systems :

Japan (ISDB-T) (DVB-T) (ATSC) Japan EuropeEurope USUS OFDM OFDM 8-VSB QPSK-16QAM- 64QAM QPSK-16QAM- 64QAM 6 MHz 7/8 MHz 6 MHz 1405 / 5617 1705 / 6817 Number of carriers 1

Réception Mobile: Reception Mobile: Yes Non移動体受信 considered

•ISDB-T : Diffusion numérique service intégré-terrestre 8-VSB: Bande latérale résiduelle 8 états

10 4-1-Terrestrial TV broadcasting (3)  Main parameters of DVB-T : SFN MFN


4-1-Terrestrial TV broadcasting (4)  Reception modes :

12 4-1-Terrestrial TV broadcasting (5)  Planning configurations/ Coverage :


4-1-Terrestrial TV broadcasting (6)

 The new generation DVB-T2 digital standard:

14 4-1-Terrestrial TV broadcasting (7)

 DVB-T2 offers higher data rates than DVB-T at a given C/N:

Cases 1 2 3


4-2-Satellite TV broadcasting (1)

 The main digital TV standards are: • DVB-S using QPSK (DTH) •2nd generation DVB-S2

16 4-2-Satellite TV broadcasting (2)

 Features of DVB-S2:


4-2-Satellite TV broadcasting (3)

 DVB-S2: New modulation schemes:

18 4-3-Cable TV broadcasting

 The main TV standards are: • DVB-C •2nd generation DVB-C2  Main features of DVB-C2 and the comparison with DVB-C


4-4-IPTV broadcasting (1)

What’s IPTV? Comparison with WebTV

20 4-4-IPTV broadcasting (2)



4-4-IPTV broadcasting (3)

 Comparison of IPTV over DSL with DVB-S and DVB-C

22 4-5-MOBILE TV broadcasting (1)

 What do we mean by Mobile TV?

 Handheld devices

 Portable devices with small

 In-car equipment


4-5-MOBILE TV broadcasting (2)

 Unicast/Broadcast solutions

Broadcast, DVB-H( DVB -H) Unicast MBMS

Mobile Network Mobile Network Mobile Network

Broadcast Network

Mobile TV User-controlled Multimedia services content to masses, personalized channels to masses and > 20 channels and interactivity communities

24 4-5-MOBILE TV broadcasting (3)

 Delivery solutions - Comparaison

Streaming Broadcast

3G-MBMS T- DMB MediaFLO DVB-H DVB-SH/STiMi/S-DMB Terrestrial – Digital Digital Hybrid Mobile TV Solutions ‘ Forward Link Multimedia Broadcast to the Satellite/Terrestrial Only’ Streaming on 3G Broadcasting Handset’ Solution Terrestrial Satellite


3G Network Terrestrial Digital Terrestrial Satellite FLO Transmitter TV Transmitter (with Gap fillers) Data Rate 384 Kbps 1.4 Mbps 11 Mbps 11 Mbps 27 Mbps BTX 2110 - 2170 VHF/L-BAND US 700 UHF Band from S-Band MHz MHz band 470 to 890 MHz (2.630~2.655 GHz)/ MTX 1920 - 1980 MHz (2.170-2.200 Ghz) Coverage(1Tx) Up to 2Km 22-40 Km Up to 25Km Up to 25Km Up to 50Km Trialed      Commercial Partially      Korea/Japan/China/Eur Primary Use Worldwide Korea/Europe US Europe ope/North America


4-5-MOBILE TV broadcasting (4)  Global Status

ISDB-T/CMMB commercial launch DMB commercial launch DMB commercial launch scheduled MediaFLO commercial launch DVB-H commercial launch DVB-H commercial launch scheduled for next 12 months DVB-H trial service

Source: Arthur D. Little, 2009

26 5-Different delivery solutions for Radio broadcasting (1)




5-Different delivery solutions for Radio broadcasting (2)

28 5-Different delivery solutions for Radio broadcasting (3)  Main families


5-Different delivery solutions for Radio broadcasting (4) Digital radio multimedia features

30 5-Different delivery solutions for Radio broadcasting (4)  DAB/DAB+/T-DMB in Europe


5-Different delivery solutions for Radio broadcasting (4)  Receiver profiles for Eureka 147


•Everyone does not introduce new systems at the same time! There will inevitably be wide timescale difference, both for production and delivery

• New digital technology appears in ‘generations’, and there will always be a ‘next generation’ ahead. There will never be a ‘best forever’ system

• Digital Switchover: The transition to should take place in the next years.

• IT programme production is inevitable

• High Definition : In five years, the only TV programme production equipment on the market may be HDTV.



TV via may have as many viewers/users as broadcasting. Internet is becoming a ‘video based’ medium

• IPTV services, Broadcasting to handhelds, are usually based on subscription and/or pay service models. They all need programmes/content that people are willing to pay for. There are ‘substitutes’ available such as Pod casting. Their success is not certain but possible.

• Try to choose a standard as close as you can to the service date.

34 ا Thank you for listening. Merci pour votre attention.