16
9 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-definition 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 file
extension ‘.jpg’ or ‘.jpeg.’
M
MP3
A file 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 file extension ‘.wma.’
EN