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Glossary
Analog audio
An electrical signal that directly
represents sound. Compare this
to digital audio which can be an
electrical signal, but is an indirect
representation of sound. See also
Digital audio.
Aspect ratio
The width of a TV screen relative
to its height. Conventional TVs
are 4:3 (in other words, the
screen is almost square);
widescreen models are 16:9 (the
screen is almost twice as wide as
it is high).
Chapter
Just as a book is split up into sev-
eral chapters, a title on a DVD
disc is usually divided into chap-
ters. See also Title.
Digital audio
An indirect representation of
sound by numbers. During
recording, the sound is measured
at discrete intervals (44, 100
times a second for CD audio) by
an analog-to-digital converter,
generating a stream of numbers.
On playback, a digital-to-analog
converter generates an analog sig-
nal based on these numbers. See
also Sampling frequency and
Analog audio.
Dolby Digital
With multichannel audio, this high
quality surround system is used in
many movie theaters around the
world.
PCM
(Pulse Code Modulation)
The most common system of
encoding digital audio, found on
CDs and DAT. Excellent quality,
but requires a lot of data com-
pared to formats such as Dolby
Digital and MPEG audio. For com-
patibility with digital audio
recorders (CD, MD and DAT)
and AV amplifiers with digital
inputs, this unit can convert
Dolby Digital and MPEG audio to
PCM. See also Digital audio.
Regions code
Regions associate discs and play-
ers with particular areas of the
world. This unit will only play
discs that have compatible region
codes. You can find the region
code of your unit by looking on
the rear panel. Some discs are
compatible with more than one
region (or all regions).
Title (DVD only)
A collection of chapters on DVD
disc. See also chapter.
Track
Audio CDs and Video CDs use
tracks to divide up the content of
a disc. The DVD equivalent is
called a chapter. See also Chapter.
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