Welcome Presentation On
Direct to Home Technology
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Introduction Components Network System architecture Facility Set top box Different usage Scenario in India Conclusion References
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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. 3
MAIN COMPONENTS OF DTH
Broadcasting center Satellites Encoders Multiplexers Modulators DTH receivers.
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Real Time TV services
Enc1 Enc2
MUX QPSK Modulator
Content “on demand” servers
Services uplinked to Satellites
Services downlinked via receive satellite dish and fed in to STB
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
Layered Model for DTV Sampling, Quantizing, Formatting
Formatting
Display Format Conversion
Program Compression
Program Decoding
Channel Insertion
Modulation, Framing and Addressing
Composing Remultiplexing
Compression
Multiplexing, Fragmenting
Channel Reception
Distribution
Routing, Regeneration
Demodulation, Delivery and Extraction
DTH Teleport Chain C-band transponder
Receiver
Receiver
Playback & Encoding
M u l t i p l e x e r
M o d u l a t o r
U p c o n v e r t e r
Ku-band transponder
H P A
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Quadrature phase shift keying (QPSK)
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Has constant envelope amplitude and widely separated phase status
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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
COAX RF IN
RELAY
RF OUT
DECRYPTION
V
BASE BAND
A
VIDEO/AUDIO DETECTION
VIDEO OUT AUDIO OUT MODULATOR
OUT OF BAND CONTROL DATA
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
SCHEMATIC SHOWING FUNCTIONING OF SET TOP BOX
C a b l e H e a d e n d
Private Home
Delivering Interactive TV Applications Content Encapsulation Content Transmission
Content Presentation
Transport Stream Data /TV/Radio Server
TCP/IP
Multiplexer
Internet Dial-Up Back Channel Internet
Service Applications Direct To Home PCs
Multicast transmission (mirroring, FMBone, News)
Multimedia IP multicast seamless services
DVB-S receiver card
DVB-S receiver card
DVB-S receiver card
Distribution to Points of Presence
Local ISP Corporate, SME
Terrestrial Access network, …
FTP Server
Internet
Seamless integration
FTP Servers
FTP Server
Full compatibility with Internet Multicast Protocols News Multifeed, Web or FTP Mirroring, audio & video broadcast, MultiCache
Standard TCP/IP data transport over DVB - S with support of UDLR RFC Compatibility with LAN operations Software open solutions Addresses management
Service Applications
Multimedia IP multicast seamless services News Multifeed, Web or FTP Mirroring, audio & video broadcast, MultiCache
Distribution to Points of Presence
Multicast transmission (Best of the Web, News, ...)
FTP Server DVB-S receiver ISP, School, SME, ...
FTP
Servers
End User, Kiosk, ...
Local ISP Corporate, SME
Terrestrial access network, …
DVB-S receiver card
Seamless integration Standard TCP/IP data transport over DVB - S Software open solutions
PLAYER’S IN D.T.H
DISH T.V
TATA SKY
BIG T.V
SUN DIRECT
VIDEOCON d2h
AIRTEL DIGITAL TV
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D.D. DIRECT
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83 INSAT 4A 74 INSAT 4CR
91.5 MEASAT 93.5 INSAT
4B
95 NSS ST1
98.5
PROTOSTAR-1
INDIAN DTH SUBSCRIBER
DTH SATELLITE SCENARIO YEAR 2009
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40
37.6
GROWTH OF DTH USERS
36.2 33.8
35 30.4
30 2007 to 2015…Growth of 683 %
) s n o25 i l l i M ( s20 r e b i r c s b15 u S
26.1
20.9
15
9.8
10 4.8
5 1.925 0.06
0.18
2003
2004
0.75
0 2005
2006
2007
2008
2009
Year
2010
2011
2012
2013
2014
2015
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Recording of TV programs remotely using mobile device.
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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.
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DTH offers better quality picture than cable TV.
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DTH offers stereophonic sound effects.
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It can also reach remote areas where terrestrial transmission and cable TV have failed to penetrate.
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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.
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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www.mindstein.com www.airtel.in www.tvasia.com www.wikipedia.com www.videocond2h.com Newspapers
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