eng TELE-audiovision 1305
The World’s Largest Digital TV Trade Magazine
The World’s Largest Digital TV Trade Magazine
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122 <strong>TELE</strong>-<strong>audiovision</strong> International — The World‘s Largest Digital TV Trade Magazine — 05-06/2013 — www.<strong>TELE</strong>-<strong>audiovision</strong>.com<br />
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1-5. vLc Installation<br />
can link to the Internet (to<br />
all the other available subnets).<br />
In order to feed TV signals<br />
into the home network, an<br />
IPTV server is needed that<br />
would receive the digital<br />
satellite, terrestrial or cable<br />
TV signals, demodulate<br />
them and feed them into a<br />
network as an IPTV packet.<br />
But it’s easier said than<br />
done as there are several<br />
problems. For one thing it<br />
has to be determined how<br />
these TV packets are to be<br />
transmitted in the network.<br />
For that there are two choices:<br />
Unicast and Muilticast.<br />
With Unicast, a TV device<br />
(for example, a computer, a<br />
tablet or an IPTC compatible<br />
TV) requests a specific<br />
TV channel from the server.<br />
This TV channel is then<br />
isolated from the transport<br />
stream (that typically carries<br />
multiple TV channels),<br />
inserted into the IPTV package<br />
and then sent directly<br />
to the TV via the switch.<br />
This solution has the advantage<br />
that the generated<br />
data traffic only takes place<br />
between the broadcaster<br />
and the TV; other TVs in<br />
the same subnet are not<br />
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