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Glossary
Broadcasting of television signals with a significantly
higher resolution than traditional formats, such as PAL or
NTSC, would allow.
Hi-Definition
(HDTV)
Downmixing allows playback device' to deliver a 5.1
channel signal to a mono signal. This allows the
traditional 2-CH television to use a 5.1CH audio signal.
Downmixing
A multi-channel digital surround sound form at that is
used for theatrical as well as consumer grade
applications.
Digital Theater
Systems (DTS)
Technology used by publishers to control access to and
usage of hardware and digital data, such as software,
music and movies.
Digital Rights
Management
(DRM)
Audio compression technology developed by Dolby
laboratories. The technology contains up to 6 channels
of sound, five channels for normal range speakers,
which include Right front, Center, Left Front, Right
Rear and Left Rear, as well as one channel for the
subwoofer. Mono and Stereo usages are also supported
by this format.
Dolby Digital
or AC3
Created by DivX Inc., a video codec that is able to
compress large video segments into smaller sizes while
maintaining a high visual quality.
DivX®
A picture signal combined with synchronization and
(possibly) color information. It is a composite of three
source signals called Y, U and V (together referred to as
YUV).
Composite
Video
The range of signal frequencies that a piece of audio or
video equipment can encode or decode; the difference
between the limiting frequencies of a continuous
frequency band. Video uses higher frequency that audio,
thus requires a wider bandwidth
Bandwidth
Developed by Microsoft, a multimedia container format
which contains both audio as well as video data allowing
Simultaneous playback.
Audio Video
Interleave (AVI)
Used to describe the distribution of pixels in a digital
image. Increasing the aspect ratio of an image lowers
the efficiency of the use of the pixels. The resulting
image will have less detail than an image with the
same amount of pixels, but with a lower aspect ratio.
Aspect Ratio
A Microsoft product that is a compressed audio format
developed to compete with the MP3 audio format.
Windows Media
Audio (WMA)
Variable Bit Rate means that a bit stream has a
changing number of bits per second. Simple scenes can
be assigned a low bit rate, with complex scenes using a
higher bit rate. This enables maintaining the consistency
across audio and video quality with optimal file size.
VBR
A file format that contain DVD-Video media. It includes
the video, audio, subtitle and the menu contents in a
streaming format.
DVD-Video
Object (VOB)
Separate video is an analog video signal that carries the
video data as two separate signals. S-Video works in
480i or 576i resolution.
S-Video
A method for displaying, storing or transmitting moving
images in which the lines of each frame are drawn in
sequence. It subjectively increases vertical resolution and
reduces flickering.
Progressive
Scan
The analog (a 625-line / 50 Hz) television system that is
currently in use in Europe and several countries in Asia.
Phase
Alternation Line
(PAL)
An audio compression format that is absolutely free, open
and unpatented
OGG Vorbis
Adopted by the National Television Systems Committee,
the analog television system that is currently in use in
Canada, Japan, South Korea, the United States and some
other countries, mostly in the Americas.
NTSC
The Moving Picture Experts Group is a working group that
is responsible for the development of video and encoding
standards.
MPEG
Also known as MPEG-1 Audio Layer 3. A popular digital
audio format that was designed to reduce the amount of
data required to represent audio, without compromising
the audio quality.
MP3
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