Alpine DVA-5205P - Manual (Page 60)

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Terminology
Dolby Digital
Dolby Digital is a digital audio compres-
sion technology developed by Dolby
Laboratories. It is compatible with not
only stereo (2-channel) sound, but also
5.1-channel surround sound. The signals
for the different channels are completely
independent, so large quantities of audio
data can be recorded efficiently on discs,
and since the sound is digital there is little
loss of sound quality.
* The separately sold digital audio
processor (PXA-H510) is required to
enjoy Dolby Digital sound.
Speaker layout for enjoying
Dolby Digital sound/dts sound
Center
speaker
Front
speakers
Rear
speakers
Subwoofer
DTS
This is a home-use digital sound format of
the DTS Sound System. This is a high
quality sound system, developed by
Digital Theater Systems Corp 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. The DVD video software
must also have a DTS sound track.
Dolby Pro Logic
Dolby Pro Logic is a Dolby Surround
format encoded onto two channels.
Proper decoding reproduces four chan-
nels (front left/right, center and rear
surround (monaural)) upon playback.
* The separately sold digital audio
processor (PXA-H510) is required to
enjoy Dolby Pro Logic 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 95 kHz/24
bits, thereby achieving higher sound
quality than music CDs.
Terminology
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.