different technologies and delivery systems of digital tv and … · •it programme production is...

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Different Technologies and Delivery Systems of Digital TV and Radio broadcasting

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

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SUMMARY

1. Intoduction

2. Image formats & definitions

3. Broadcasting compression norms

4. Different delivery solutions for TV broadcasting

5. Different delivery solutions for Radio broadcasting

6. Conclusion

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INTRODUCTION

� 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

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2-IMAGE FORMATS & DEFINITIONS (1)

�Profiles HDTV, SDTV and Mobile TV (pixels/lines)

Typ. 320x240

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

1280x720 (16/9)

SDTVHandset (LDTV) HDTV 720p HDTV 1080p/1080i

1920x1080 (16/9)

Vehicular

PMP

Compared to Standard TV (SDTV)

� 4 times less bandwidth 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

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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

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� Names of MPEG4 AVC /H264 ( History)

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� 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

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4-Different delivery solutions for TV broadcasting

� The main delivery solutions for TV broadcasting:

•Terrestrial•Satellite•Cable•IPTV•Mobile TV

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4-1-Terrestrial TV broadcasting (1)

� The main digital standards are :• ATSC ( North America)• ISDB-T (Japan, Brazil)• DMB-T/H ( China)• DVB-T ( Europe)

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Japan Japan

Réception Mobile: Yes

USUSUS

移動体受信移動体受信移動体受信移動体受信

6 MHz

OFDM

6 MHz

8-VSB

7/8 MHz

EuropeEuropeEurope

Reception Mobile: Yes Non considered

QPSK-16QAM- 64QAM

1405 / 5617 1705 / 6817 1Number of carriers

8-VSB: Bande latérale résiduelle 8 états

(ISDB-T) (DVB-T) (ATSC)

OFDM QPSK-16QAM- 64QAM

•ISDB-T : Diffusion numérique service intégré-terrestre


� Comparison between main systems :

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SFN MFN


� Main parameters of DVB-T :

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� Reception modes :

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� Planning configurations/ Coverage :

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� The new generation DVB-T2 digital standard:


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Cases 1 2 3

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


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4-2-Satellite TV broadcasting (1)

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

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� Features of DVB-S2:


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� DVB-S2: New modulation schemes:


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4-3-Cable TV broadcasting

� The main digital cable TV standards are:• DVB-C•2nd generation DVB-C2

� Main features of DVB-C2 and the comparison with DVB-C

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4-4-IPTV broadcasting (1)

�What’s IPTV? Comparison with WebTV

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•IPTV ARCHITECTURE•PROPRIEATARY SOLUTIONS


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

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� What do we mean by Mobile TV?

� Handheld devicesmobile phone

� Portable devices with small antenna

� In-car equipment

4-5-MOBILE TV broadcasting (1)

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� Unicast/Broadcast solutions

Mobile NetworkMobile NetworkMobile Network

Broadcast Network

Multimedia services to masses andcommunities

User-controlledpersonalized channelsand interactivity

Mobile TV content to masses, > 20 channels

Broadcast, DVB-H Unicast MBMS

Mobile NetworkMobile NetworkMobile Network

Broadcast Network

Multimedia services to masses andcommunities

User-controlledpersonalized channelsand interactivity

Mobile TV content to masses, > 20 channels

Broadcast, (DVB-H) Unicast MBMS


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Mobile TV Solutions

T- DMB MediaFLO DVB-H DVB-SH/STiMi/S-DMB

Terrestrial – Digital Multimedia

Broadcasting

‘Media Forward Link Only’

Digital Video Broadcast to the

Handset’

Hybrid Satellite/Terrestrial

Solution

Terrestrial Satellite

Transmitter

3G Network Repeater

Terrestrial Transmitter

FLO Transmitter Digital Terrestrial TV Transmitter

Satellite (with Gap fillers)

Data Rate 384 Kbps 1.4 Mbps 11 Mbps 11 Mbps 27 Mbps

Frequency

BTX 2110 - 2170 MHz

MTX 1920 - 1980 MHz

VHF/L-BAND US 700 MHz band

UHF Band from 470 to 890 MHz

S-Band (2.630~2.655 GHz)/

(2.170-2.200 Ghz)

Coverage(1Tx)

Trialed

Commercial Partially

Primary Use Worldwide Korea/Europe US Europe Korea/Japan/China/Europe/North America

Up to 2Km

�

�

�

22-40 Km

�

�

�

��

�

�

Up to 25Km

BroadcastBroadcastStreamingStreaming3G-MBMS

Digital Video Streaming on 3G

Up to 25Km Up to 50Km

Mobile TV Solutions



Broadcasting



Handset’


Solution


Transmitter

3G Network Repeater





Frequency

BTX 2110 - 2170 MHz

MTX 1920 - 1980 MHz



S-Band (2.630~2.655 GHz)/

(2.170-2.200 Ghz)

Coverage(1Tx)

Trialed



Mobile TV Solutions



Broadcasting



Handset’


Solution


Transmitter

3G Network Repeater





Frequency

BTX 2110 - 2170 MHz

MTX 1920 - 1980 MHz



S-Band (2.630~2.655 GHz)/

(2.170-2.200 Ghz)

Coverage(1Tx)

Trialed



Up to 2Km

�

�

�

22-40 Km

�

�

�

��

�

�

Up to 25Km

BroadcastBroadcastStreamingStreaming3G-MBMS

Digital Video Streaming on 3G

Up to 25Km Up to 50Km

� Delivery solutions - Comparaison


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ISDB-T/CMMB commercial launch

DMB commercial launch

MediaFLO commercial launch

DVB-H trial service

DVB-H commercial launch

DVB-H commercial launch scheduled for next 12 months

DMB commercial launch scheduled

Source: Arthur D. Little, 2009

ISDB-T/CMMB commercial launch

DMB commercial launch

MediaFLO commercial launch

DVB-H trial service

DVB-H commercial launch

DVB-H commercial launch scheduled for next 12 months

DMB commercial launch scheduled

Source: Arthur D. Little, 2009

� Global Status


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5-Different delivery solutions forRadio broadcasting (1)

ANALOGUE SYSTEMS

DIGITAL SYSTEMS

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� Main Digital radio families

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�Digital radio multimedia features

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� DAB/DAB+/T-DMB in Europe

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� Receiver profiles for Eureka 147


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6-CONCLUSION (1)

•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 digital broadcasting should take place in the next years.

• IT programme production is inevitable

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

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• Internet TV via broadband 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.

6-CONCLUSION (2)

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Thank you for listening.Thank you for listening.

MerciMerci pour pour votrevotre attention.attention.

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