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error-correction code. This allows the receiver to detect
and correct errors (within some bound) without the need
to ask the sender for additional data. The advantages of
forward error correction are that a back-channel is not
required and retransmission of data can often be avoided
(at the cost of higher bandwidth requirements, on
average).
HDMI Stands for High-Definition Multimedia Interface. It is a
compact audio/video interface for transmitting
uncompressed digital data. HDMI connects digital audio/
video sources—such as set-top boxes, Blu-ray Disc
players, personal computers (PCs), video game consoles
(such as the PlayStation 3 and some models of Xbox
360), and AV receivers—to compatible digital audio
devices, computer monitors, and digital televisions. As an
uncompressed connection, HDMI is independent of the
various digital television standards used by individual
devices, such as ATSC and DVB, as these are
encapsulations of compressed MPEG video streams
(which can be decoded and output as an uncompressed
video stream on HDMI).
LNB Stands for Low-Noise Block converter. This is the
(receiving, or downlink) antenna of what is commonly
called the parabolic satellite dish commonly used for
satellite TV reception. The LNB is usually fixed on or in
the satellite dish. The purpose of the LNB is to take a wide
block (or band) of relatively high frequencies, amplify
and convert them to similar signals carried at a much
