Definition of Direct Broadcast Satellite (DBS)
Direct Broadcast Satellite
(DBS) – (a.k.a. Satellite TV) - DBS TV is
the name for the broadcast delivery system commonly referred simply as
"Satellite TV". It's a satellite communications technology that allows
use of a small (18 inches to 3 feet in diameter) receiver dish
typically put on the consumer's roof, as well as a receiver unit
(a.k.a. decoder, set-top box,) positioned by a TV so the consumer can
receive satellite television signals from the dish.
DBS has a huge channel capacity. With DBS, several standard
analog television signals are digitally compressed allowing hundreds of
channels to be received (though different subscription services exist
and not every DBS subscriber would get hundreds of channels.)
With special dishes that point to two or even three positions
simultaneously, this number may eventually be increased to up to 500
Sky is a major DBS company in the UK. Sky offers the best
Interactive TV. (The UK is the most advanced country in terms of
Interactive Television.) There are primarily two U.S. DBS providers,
DIRECTV and DISH Network (EchoStar). DISH, a pioneer in
Interactive Television, offers the best Interactive Television in the
US of the two.
One way to experience interactivity while watching satellite TV is to
watch it on your PC. First you’ll need to install a DVB-S receiver card
for your PC. This is assuming the satellite TV service you subscribe to
uses DVB-S or DVB-S2 for data distribution.
Internet Protocol over Satellite or IPoS, is the most widely deployed
satellite broadband standard and has become the first global standard
for the industry. The announcement was made by Hughes Network Systems
following the European Telecommunications Standards Institute (ETSI)
ratification of the IPoS air interface standard in February. IPoS was
first ratified early in 2004 by the Telecommunication Industry
Association (TIA), the primary standards body for the
telecommunications industry in North America.
(Satellite - Data Over Cable Service Interface Specification).
S-DOCSIS is a modification of the DOCSIS cable-modem protocol for
Internet transmission over satellite. At least to some extent it can
share development costs with cable providers and others using DOCSIS.
Satellite TV Systems