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10 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, while the ratio of a high-de nition
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.
Files are recognized by their le extension
‘.jpg’ or ‘.jpeg.’
M
MP3
A le format with a sound data compression
system. MP3 is the abbreviation of Motion
Picture Experts Group 1 (or MPEG-1) Audio
Layer 3. With the MP3 format, one CD-R or
CD-RW can contain about 10 times more
data than a regular CD.
P
PBC
Playback Control. A system where you
navigate through a Video CD/Super VCD
with on-screen menus that are recorded
onto the disc. You can enjoy interactive
playback and search.
Progressive scan
The progressive scan displays twice the
number of frames per second than in an
ordinary TV system. It offers higher picture
resolution and quality.
W
WMA
Windows Media™ Audio. Refers to an
audio compression technology developed by
Microsoft Corporation. WMA data can be
encoded with Windows Media player version
9 or Windows Media player for Windows XP.
Files are recognized by their le extension
‘.wma.’
Glossar
y
English
EN