Information; About Dvds; Terminology - Alpine IVA-D106 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 colors thanks
to a horizontal resolution of over 500 lines (compared to less than 300
for VHS tape).
In addition, DVDs offer a variety of functions.
Multiple audio* (page 25)
Movies can be recorded in up to eight languages. The desired
language can be selected from the unit.
Subtitles function* (page 25)
Movies can include subtitles in up to 32 languages. The desired
subtitle language can be selected from the unit.
Multi angle function* (page 25)
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
instructions.
* The functions audio languages, subtitle languages, angles, etc., differ
from disc to disc. For details, refer to the disc's instructions.
70
-EN
Track pitch -
1.6 µm
Track pitch -
0.74 µm

Terminology

Dolby Digital
Dolby Digital is a digital audio compression technology
developed by Dolby Laboratories that allows large quantities of
audio data to be efficiently recorded on discs. It is compatible
with audio signals from mono (1 channel) all the way up to 5.1-
channel surround sound. The signals for the different channels
are completely independent, and since the sound is high quality
digital there is no loss of sound quality.
Center
speaker
Front
speakers
Rear
speakers
Subwoofer
Speaker layout for enjoying Dolby Digital sound/DTS sound
DTS
This is a home-use digital sound format of the DTS Sound
System. This is a high quality sound system, developed by DTS,
Inc. for use in movie theaters.
DTS has six independent sound tracks. The theater presentation
is fully realized in the home and other settings. DTS is the
abbreviation for Digital Theater System.
* To enjoy DTS surround sound you need the separately sold DTS
digital audio processor (PXA-H700, etc.). The DVD video software
must also have a DTS sound track.
The IVA-D106 has a built-in DTS 2-channel audio decoder.
Analog audio outputs are available.
Dolby Pro Logic II
Dolby Pro Logic II plays 2-channel sources in 5 channels over
the entire frequency range.
This is done with an advance, high sound quality matrix
surround decoder which draws out the spatial properties of the
original recording without adding any sounds to or changing the
sound of the source.
* The separately sold digital audio processor (PXA-H700, etc.) is
required to enjoy Dolby Pro Logic II surround sound.
Linear PCM audio (LPCM)
LPCM is a signal recording format used for music CDs.
Whereas music CDs are recorded at 44.1 kHz/16 bits, DVDs are
recorded at 48 kHz/16 bits to 96 kHz/24 bits, thereby achieving
higher sound quality than music CDs.
Rating levels (parental lock)
This is a function of the DVD for restricting the viewing age as
stipulated by laws in different countries. The way in which
viewing is restricted differs from DVD to DVD. Sometimes the
DVD cannot be played at all, other times certain scenes are
skipped, and other times certain scenes are replaced with other
scenes.