DTH(Direct To Home Television)

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DTH stands for Direct-To-Home television.

Defined as the reception of satellite

programs with a personal dish in anindividual home.

DTH symbols the “Transmission of digital

video channel to home subscribers

through small dish antenna”

DTH services were first proposed in India in 1996 but failed with

approval. Due to national security, In 1997 Again Ban imposed

Rupert Murdoch- owned INDIAN SKY BRODCASTING(ISKYB).

Finally Approved & Allowed in 2000.

New policy requires all operators to set up in 12 months for

license. DTH licenses in India will cost $2.14 million and will be

valid for 10 years.

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A DTH network consists of a

Programming SourcesBroadcasting Centre

Satellites

Encoders

Multiplexers

Modulators and

DTH receivers14/03/2012 3



The broadcast center converts all of thisprogramming into a high-quality, uncompressed digital

stream. At this point, the stream contains a vast

quantity of data about 270 (Mbps) for each channel.

For DTH system communication channel is air and

Band-Width is :

Ku Band Uplink : 13.75 to 14.5 GHz

Ku Band Down links: 10.95 to 11.2 GHz

: 11.45 to 11.70 GHz

: 12.50 to 12.75 GHz14/03/2012 4



Moving Picture Experts Group is a working group of the

ISO. The term also refers to the family of digital videocompression standards and file formats developed by the

group.

MPEG generally produces better-quality video than

competing formats, such as Video for Windows andQuickTime. MPEG files previously on PCs needed hardware

decoders(codecs) for MPEG processing.

MPEG compression is accomplished through the use off our

basic techniques: preprocessing, temporal prediction, motioncompensation, and quantization coding14/03/2012 5



Geostationary satellite plays an important role for DTH system

GEOSTATIONARY SATELLITE:-

Geostationary satellite are located exactly above the

earth's equator and revolve around the earth in a

circular orbit.

Geostationary satellites are positioned at an exact

height above the earth (about 36000 Km).

At this height they rotate around the earth at the same

speed as the earth rotates around its axis

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Receiver solid Antenna

The receive terminals are basically for the reception of the

signals being beamed from the transmission station. The

terminal consists of the following:

o receive type solid offset antenna

o

LNB feed systemo Interface cables &

o Set top box

The terminal can be placed outside the window of a high rise

building, on the ground or a roof mount. The terminals can be

used as per the contents being beam by the transmission

stations.

LNB feed system

Interface cables

Set top box

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LNB is the part of a satellite antenna which is positioned in front

of the dish to receive the signal and converts the signal to be carried by cableto the receiver .

Low noise block down converter is the antenna of what is

commonly called the parabolic satellite dish commonly used in

satellite TV reception.

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set-top box is a device that enables a television set become

a user interface to the Internet and also enables a television

set to receive and decode digital television (DTV) broadcasts.

TV set-top boxes are sometimes called receivers. A set-

top box is necessary to television viewers who wish to use

their current analog television sets to receive digital

broadcasts.

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Satellite TV involves receiving signals from a satellite where as cable TV entailsairing programs. The biggest difference between satellite and cable TV is the

picture and sound quality. Unlike cable TV, satellite TV programs are excellent

quality with some of them being high definition. Here are some guidelines that

can help compare Dish Network with cable TV.

Dish network features, HD,

Dolby5.1ch, CD sound, superior

picturequality with huge nos of

Channel access.

Dish tv has remote geographical

access with limited instalation

Special features- recording and

play games , study aids for

children, and language and home

tutorial packages, with movies ondemand.

Average Accessed quality

of sound and picture,

Limited numbers of

channels accessed.

Cable for subscriber is a

limited to wire but major

to the supplier with huge

installation.

Cable TV had manual

access with least featuresbut with Cable modem net.

Dish tv Cabel tv

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Doordarshan free-to-air services providing 40 TV channels

with no subscription fees is an attractive preposition to peoplein urban and rural areas.

A number has started IP broadcast with return channel on PSTN

line and this would be for education and other application.

Cost effective communication , information and

entertainment.

DTH services are transparent providing digital quality

video, audio, radio, and IP to all at equal prices and otherbenefits with reliability

Small size terminals can provide upto4000 TV

channels and 2000 radio channels through a click of a

button and thus brings world’s latest

information , news , entertainment to your home.14/03/2012 11



DTH has made the hopes of the people of rural areas to

come true.

It helps to develop and explore the ignited mind of people of

India to think beyond the scope of imagination.

It also helps to develop the economic conditions of a country.

The DTH market in INDIA is relatively increase day -by-day,

Major competitors like Airtel , Reliance, TATA, Videocon market

clash would managed to overtake Japan as the largest DTH

market in Asia. In the next 5 years (by 2014-15) we will be able

to add another 30 million subscribers .

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DTH(Direct To Home Television)

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