Glossary - Philips HTS3172/93 User Manual

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, while the ratio of a high-defi 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.
D
DivX®
The DivX® codec is a patent-pending,
MPEG-4 based video compression technology
developed by DivX®, Inc. It can shrink the fi le
size of digital video and still maintain the high
visual quality.
Dolby Digital Pro Logic II
An advanced, matrix decoding technology that
expands any two channel audio, such as CDs
and stereo encoded videocassettes, video
games and TV broadcasts to a fi ve channel
full bandwidth (range) playback (Left/Center/
Right/Left Surround/Right Surround), resulting
in a surround sound experience.
DTS
Digital Theatre Systems. A surround sound
system for providing 5.1 channels of discrete
digital audio in consumer electronics products
and software content. It is not developed by
Dolby Digital.
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 fi le extension
'.jpg' or '.jpeg.'
M
MP3
A fi 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.
MPEG
Motion Picture Experts Group. A collection
of compression systems for digital audio and
video.
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.
PCM
Pulse Code Modulation. A digital audio
encoding system.
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 fi le extension
'.wma.'
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