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11 Glossary
A
Aspect ratio
Aspect ratio refers to the length to height ratio
of TV screens. The ratio of a standard TV is 4:3,
is 16:9. The letter box allows you to enjoy a
picture with a wider perspective on a standard
4:3 screen.
J
JPEG
A very common digital still picture format. A
still-picture data compression system proposed
by the Joint Photographic Expert Group, which
features small decrease in image quality in
spite of its high compression ratio. Files are
K
Kensington lock
A Kensington Security Slot (also called a K-Slot
or Kensington lock). Part of an anti-theft system.
It is a small, metal-reinforced hole found on
almost all small or portable computer and
electronics equipment, particularly on expensive
and/or relatively light ones, such as laptops,
computer monitors, desktop computers,
gaming consoles, and video projectors. It is
used for attaching a lock-and-cable apparatus, in
particular those from Kensington.
M
Memory Stick
storage on cameras, camcorders and other
handheld devices.
34
EN
MMC Card
provides storage for cellphones, PDAs and
memory for read/write applications or ROM
chips (ROM-MMC) for static information, the
latter widely used for adding applications to a
Palm PDA.
S
SD Card
card that provides storage for digital cameras,
cellphones and PDAs. SD Cards use the same
32 x 24mm form factor as the MultiMediaCard
(MMC), but are slightly thicker (2.1mm vs.
1.4mm), and SD Card readers accept both
formats. Cards up to 4GB are available.
X
xD Card
card used in digital cameras.
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