21
lock-and-cable apparatus, in particular those
from Kensington.
M
Memory Stick
!*"$!
storage on cameras, camcorders and other
handheld devices.
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.
T
Thumbnail
A thumbnail is reduced-size versions of a
picture that is used to make it easier to
recognize an them. Thumbnails serve the
same role for images as a normal text index
does for words.
11 Glossary
A
Aspect ratio
Aspect ratio refers to the length to height
ratio of TV screens. The ratio of a standard
>[=\
or wide TV 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.
%!^
‘.jpg’ or ‘.jpeg.’
K
Kbps
Kilobits per second. A digital-data-rate
measurement system which is often used
with highly compressed formats such as AAC,
DAB, MP3 etc. The higher the amount, the
better the quality generally is.
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
EN
