Thakur
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'DTH' coming up to muddle things up for you
and me.
Doordarshan will launch its Direct-To-Home
telecast from April 1. Broadcasters like Star
and Zee are pushing hard for DTH services in
India too.
So what is this DTH all about? How, if at all,
does it help the customer? Is it good? Let's
find out.
What is DTH?
DTH stands for Direct-To-Home television. DTH
is defined as the reception of satellite
programmes 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 the consumer. Only
cable operators can receive satellite
programmes and they then distribute them to
individual homes.
How does DTH work?
A DTH network consists of a broadcasting
centre, satellites, encoders, multiplexers,
modulators and DTH receivers.
A DTH service provider has to lease Ku-band
transponders from the satellite. The encoder
converts the audio, video and data signals into
the digital format and the multiplexer mixes
these signals. At the user end, there will be a
small dish antenna and set-top boxes to
decode and view numerous channels. On the
user's end, receiving dishes can be as small as
45 cm in diametre.
DTH is an encrypted transmission that travels
to the consumer directly through a satellite.
DTH transmission is received directly by the
consumer at his end through the small dish
antenna. A set-top box, unlike the regular
cable connection, decodes the encrypted
transmission.
How does DTH really differ from cable TV?
The way DTH reaches a consumer's home is
different from the way cable TV does. In DTH,
TV channels would be transmitted from the
satellite to a small dish antenna mounted on
the window or rooftop of the subscriber's
home. So the broadcaster directly connects to
the user. The middlemen like local cable
operators are not there in the picture.READ MORE What is DTH? - Rediff.com Business
