Mobile TV :  Indian perspective

­ Shri A.K. Bhatnagar

Chief Engineer, Doordarshan, Head Quarter, Prasar Bharati

 

Mobile TV :

- Indian perspectiven    

- Broadcast Scenario in India

- Technology Overview

- Present Status

- Regulatory Framework

- Growth Drivers

- Issues & Challenges

- Conclusion

 

Broadcast Scenario in India

- Over 40 Mn Households Depend only on Doordarshan Terrestrial Transmissions

- Over 5 Mn Free To Air DTH “DD Direct Plus” users

- 6 Pvt. DTH Operators

- Over 80 Mn Cable Homes

- Over 60000 Cable operators and over 6000 MSOs

- Over 400 registered satellite channels

 

 

 

Doordarshan Network

 

- 30 Digital Satellite TV Channels

- 1414 Terrestrial Transmitters

- 91.8% Population Coverage

- 66 TV Studio Centers

- Free to Air DTH Service “DD Direct Plus” with 59 TV channels and 20 Radio channels     

 

DD Transmitter Network

High Power Transmitters

( 1KW to 30 KW)         209

Low Power Transmitters

(100W to 500W)           817

Very Low Power Transmitters

 (< 100W) Solar operated 384

DTT Transmitter 5KW           4

Total  1414

 

 

 

Terrestrial Mobile TV Technologies

DVB Group Non Proprietary Standards

Standard          Digital TV Platform

DVB-S / DVB-S2   :

Satellite broadcasting / DTH DVB-T                    :   

Digital Terrestrial TV Broadcasting

DVB-C                    :   Digital Cable TV

DVB-RCS               :   Return Channel

DVB-H                    :   Terrestrial Mobile TV

DVB-SH                  :   Satellite Mobile TV

DVB (Digital Video Broadcasting)

Group consists of about 230 broadcasters,

network operators & regulatory bodies.

DVB-H :  Technical Parameters

Frequency Band            :           UHF ( 470-860 MHz )

RF Channel Band width :           5, 6, 7, 8 MHz

Modulation        :           COFDM –

QPSK, 16 QAM, 64 QAM

Hierarchical Modulation :           Yes

OFDM Subcarriers        :           2K, 4K, 8K

Time and Frequency Diversity    :           Yes

Error Correction        :           Reed Solomon Coding

Guard Interval            :           7, 14, 28, 56, 112, 224

Single Frequency Network (SFN)     

:        Yes

Mobile TV (DVB-H) :  Technical Parameters

Power Saving  :           Time Slicing

Video Quality  :           QVGA Quality

Bit Rate          :           384 kbps

Video Compression    MPEG 4 (H.264)

Statistical Multiplexing          :Yes

No. of Video Channels            :16 in 8 MHz BW

 

 

Requirement of Gap fillers / Repeaters

-  Digital Mobile TV Service is required to be planned for much higher percentage availability (90%, 95%) as compared to Analog Broadcasting which is usually planned for 50%

 

- Gap fillers (trans-receivers) are

 

DD DVB-H Transmission

n          Location           : Akashwani Bhawan, New Delhi.

n          Transmitter      : 50 KW EIRP Single Transmitter, 100 M Tower.

n          Txn. Parameters          : 8K, 1/8 GI, QPSK, 3/4 FEC, MPE-FEC 15%

n          Multiplex        : Non Hierarchical, 16 TV services

n          Statistical Mux            : @ 96 ~ 410 Kbps

n          Frequency        : Channel 26 (510-518MHz)

n          Video Format  : H.264-AVC,

n          Encryption       : FTA (Free to Air)

n          ESG     : CBMS /OMA BCAST compliant

n          Hand sets         : Nokia N92, N96, N77 or other DVB-H handset

               (IPV-6)

DD DVB-H Measurement Results

n          Coverage  =  12 km (C/N = 22dB, BER = 10-6)

n          Building Penetration loss  = 20dB

n          Vehicle Penetration loss  =  6  dB

n          Height loss from 3rd floor to ground floor  = 20dB

n          Secondary Transmitters and Gap fillers required in SFN

 

DD DVB-H Transmission

n          Location           : Akashwani Bhawan, New Delhi.

n          Transmitter      : 50 KW EIRP Single Transmitter, 100 M Tower.

n          Txn. Parameters          : 8K, 1/8 GI, QPSK, 3/4 FEC, MPE-FEC 15%

n          Multiplex        : Non Hierarchical, 16 TV services

n          Statistical Mux            : @ 96 ~ 410 Kbps

n          Frequency        : Channel 26 (510-518MHz)

n          Video Format  : H.264-AVC,

n          Encryption       : FTA (Free to Air)

n          ESG     : CBMS /OMA BCAST compliant

n          Hand sets         : Nokia N92, N96, N77 or other DVB-H handset

               (IPV-6)

DD DVB-H Measurement Results

n          Coverage  =  12 km (C/N = 22dB, BER = 10-6)

n          Building Penetration loss  = 20dB

n          Vehicle Penetration loss  =  6  dB

n          Height loss from 3rd floor to ground floor  = 20dB

n          Secondary Transmitters and Gap fillers required in SFN

 

DVB-SH Systems

-  hybrid satellite/terrestrial system

-  Designed to use frequencies below 3GHz.

-  System and specifications have been published as ETSI standards.

-  Successfully demonstrated by Alcatel at NAB, Las Vegas ,08

 

 

CONCLUSION

-  Mobile TV provides anytime, anywhere and interactive content consumption.

-  Mobile Growth is phenomenal India - offers a huge market.

-  Broadcasting technologies best suited for simultaneously addressing a large user base economically.

-  Several mobile TV technologies are available – receivers are non interoperable.

-  Cellular networks are more suited for On demand type content.

-  Content consumption behavior in mobile environment needs to be evaluated.

-  Cricket events may be key drivers for expansion of Mobile TV Services in India.

-  Apart from infotainment, Mobile TV has a potential role in education, social development & disaster management.

-  A conducive regulatory policy frame work and cooperative business models will provide win win situation for all in the value chain