About Dvds - Alpine IVA-D310RB Owner's Manual

Information

About DVDs

Music CDs and DVDs have grooves (tracks) in which the digital
data is recorded. The data is represented as microscopic pits
recorded into the track – these pits are read by a laser beam to
play the disc. On DVDs, the density of the tracks and pits is
twice that of CDs, so DVDs can contain more data in less space.
CDs
Minimum pit
length -
1.2 mm
0.9 µm
DVDs
Minimum pit
0.6 mm
length -
0.6 mm
0.9 µm
A 12 cm disc can contain one movie or about four hours of
music.
In addition, DVDs provide sharp picture quality with vivid colours
thanks to a horizontal resolution of over 500 lines (compared to less
than 300 for VHS tape). With the addition of an optional, digital audio
processor (PXA-H900/PXA-H510/PXA-H700, etc.), you can recreate
the power and presence of a movie theater with Dolby Digital 5.1-
channel Surround.
In addition, DVDs offer a variety of functions.
Multiple audio* (page 24)
Movies can be recorded in up to eight languages. The desired
language can be selected from the unit.
Subtitles function* (page 24)
Movies can include subtitles in up to 32 languages. The desired
subtitle language can be selected from the unit.
Multi angle function* (page 23)
When the DVD contains a movie shot from multiple angles, the
desired angle can be selected from the unit.
Multi story function*
With this function, a single movie includes various story lines.
You can select different story lines to view various versions of the
same movie.
Operation differs from disc to disc. Story line selection screens
including instructions appear during the movie. Just follow the
Track pitch -
instructions.
1.6 µm
* The functions audio languages, subtitle languages, angles, etc., differ
Track pitch -
0.74 µm
from disc to disc. For details, refer to the disc's instructions.
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-EN