dth technology
TRANSCRIPT
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WelcomePresentation
On
Direct to Home Technology
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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
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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.
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Basic Elements of DTH System and Signal Flow
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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
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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
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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
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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
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Cable H
ead-end
Private Home Private Home
Private Home
DTH Receive Facility
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Delivering Interactive TV Applications
InternetDial-Up Back Channel
TCP/IP
TransportStream
Data /TV/RadioServer
Internet
Multiplexer
Content EncapsulationContent Transmission
Content Presentation
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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
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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.
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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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