18
10 Glossary

A

Aspect ratio
Aspect ratio refe rs to the length t o height ratio of
TV screens. The r atio of a standard T V is 4:3, while
the ratio of a high-de finition or wide T V is 16:9.
The letter box allows yo u to enjoy a picture wi th a
wider perspect ive on a standard 4 :3 screen.

J

JPEG
A very common digita l still picture fo rmat. A still-
picture data compr ession system pro posed by the
Joint Photographic E xpert Grou p, which features
small decrease in ima ge quality in spite of i ts high
compression ratio. F iles are recognized by t heir file
extension ‘. jpg’ or ‘.jpe g.’

M

MP3
A file format with a sound d ata compression
system. MP3 is the ab breviation of Motio n Picture
Experts Gro up 1 (or MPEG-1) Audio Layer 3. W ith
the MP3 format, one CD -R or CD-RW can co ntain
about 10 times more dat a than a regular CD.

P

PBC
Playback Control. A sy stem where you navi gate
through a Video CD/Su per VCD with on-scr een
menus that are record ed onto the disc. You can
enjoy interactive p layback and search .
Progressive scan
The progressive sca n displays twice the n umber of
frames per second tha n in an ordinary T V system. It
offers higher pict ure resolution an d quality.

W

WMA
Windows Media™ Audio. Refer s to an audio
compression technolo gy developed by Micros oft
Corporation. WM A data can be encoded w ith
Windows Media player ver sion 9 or Windows
Media player for Windows X P. Files are recognized
by their file extensio n ‘.wma.’
EN