dth- rajan

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WelcomePresentation

On

Direct to Home Technology

Presented by:RAJAN KUMAR

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CONTENTS Introduction Components Network System architecture Facility Set top box Different usage Scenario in India Conclusion References

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What is DTH ?

DTH is defined as:

The reception of satellite programs with a

personal dish in an individual home.

DTH does away with the need for the local cable

operator and puts the broadcaster directly in touch

with consumer .

A wireless digital audio / video service is

delivered through satellite.

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MAIN COMPONENTS OF DTH

Broadcasting center Satellites Encoders Multiplexers Modulators DTH receivers.

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Services uplinked to Satellites

Services downlinked viareceive satellite dish

and fed in to STB

Enc1

Enc2 MUX

Content “on demand” servers

QPSKModulator

Real Time TV services

PROCESS

DTH System Architecture

•It encompasses the uplink systems for digitizing, compressing, and transmitting multiple television programs using the DVB-S standard, for example.

•Other elements are required for the contribution of the programs, storage and switching of video signals, and the management of DTH as a customer service.

Basic Elements of DTH System and Signal Flow

Compression

Routing, Regeneration

Formatting

ChannelReception

Distribution

ChannelInsertion

ProgramCompression

Sampling, Quantizing, Formatting

Display

Multiplexing,Fragmenting Remultiplexing

Modulation, Framing and Addressing

Demodulation,Delivery and Extraction

Layered Model for DTV

ProgramDecoding

Composing

Format Conversion

Receiver

Receiver

Mu

ltiplexer

Mo

du

lator

Playback & Encoding

C-band transponder

Ku-band transponder

DTH Teleport DTH Teleport ChainChain

HP

A

Up

con

verter

MODULATION

• Quadrature phase shift keying (QPSK)

• Has constant envelope amplitude and widely separated phase status

• Provides high degree of

ruggedness against channel noise and interference

• Encoded digital symbols, each composed of 2 bits, are processed by a conventional Gray – coded QPSK modulator

DECRYPTIONBASE BAND

VIDEO/AUDIO

DETECTIONOUT OF BAND CONTROL DATA

MODUL-ATOR

A

V VIDEO OUT

AUDIO OUT

RF OUTCOAX RF IN

WHEN STB IS ENERGISED RELAY AT INPUT AND OUT PUT PORT CONNECTS STB CIRCUIT OTHERWISE RF SIGNAL GETS PATH TO RF OUT TO PLAY OUT FTV

RELAY

SCHEMATIC SHOWING FUNCTIONING OF SET TOP BOX

SET TOP BOX

Cable H

ead-end

Private Home Private Home

Private Home

DTH Receive Facility

Delivering Interactive TV Applications

InternetDial-Up Back Channel

TCP/IP

TransportStream

Data /TV/RadioServer

Internet

Multiplexer

Content EncapsulationContent Transmission

Content Presentation

Multimedia IP multicast seamless services

Full compatibility with Internet Multicast Protocols

News Multifeed, Web or FTP Mirroring, audio & video broadcast, MultiCache

Distribution to Points of Presence

Local ISP Corporate, SME Terrestrial Access network, …

Seamless integration Standard TCP/IP data transport

over DVB - S with support of UDLR RFC

Compatibility with LAN operations Software open solutions Addresses management

FTP Servers

DVB-Sreceivercard

FTP Server

DVB-Sreceivercard

DVB-Sreceivercard

FTPServer

Multicast transmissionMulticast transmission(mirroring, FMBone, News(mirroring, FMBone, News))

InterneInternett

Service Applications Direct To Home PCs

Multimedia IP multicast seamless services

News Multifeed, Web or FTP Mirroring, audio & video broadcast, MultiCache

Distribution to Points of Presence Local ISP Corporate, SME Terrestrial access network, …

Seamless integration Standard TCP/IP data transport

over DVB - S Software open solutions

FTP Servers

DVB-Sreceiver

FTP Server DVB-S

receivercard

ISP, School, SME, ...

End User,Kiosk, ...

Multicast transmissionMulticast transmission(Best of the Web, News, ...)(Best of the Web, News, ...)

Service Applications

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PLAYER’S IN D.T.H

DISH T.V

TATA SKY

BIG T.V

SUN DIRECT

VIDEOCON d2h

AIRTEL DIGITAL TV

• D.D. DIRECT

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93.5 INSAT 4B

95 NSS

83 INSAT 4A

74 INSAT 4CR

ST1

DTH SATELLITE SCENARIO YEAR 2009

INDIAN DTH

SUBSCRIBER

91.5 MEASAT

98.5

PROTOSTAR-1

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0.06 0.18 0.751.925

4.8

9.8

15

20.9

26.1

30.4

33.8

36.237.6

0

5

10

15

20

25

30

35

40

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

Year

Subs

crib

ers

(Mill

ions

)

GROWTH OF DTH USERS

2007 to 2015…Growth of 683 %

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LATEST IN DTH IN INDIA

Recording of TV programs remotely using mobile device.

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Satelite LCD & DVD by Videocon

DTH signal can be received by this LCD television without using any STB.

STB having All the functios of a DVD player.

Is DTH superior to cable TV?

• Yes.

• DTH offers better quality picture than cable TV.

• DTH offers stereophonic sound effects.

• It can also reach remote areas where terrestrial transmission and cable TV have failed to penetrate.

• Apart from enhanced picture quality, DTH also allows for interactive TV services such as movie-on-demand, Internet access, video conferencing and e-mail with return path.

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CONCLUSION DTH has made the hopes of the people of rural areas to come true.

DTH service in India is in initial stage delivering only TV broadcasting

In near future, launch of DTH internet service is expected in our country.

It provide the wide thinking of rural people which helps to develop the culture of society.

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REFERENCES

www.mindstein.comwww.airtel.inwww.tvasia.comwww.wikipedia.comwww.videocond2h.comNewspapers

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