Terminology - Alpine DVA-5200 Manual De Operación

Terminology

Terminology
Dolby Digital (AC-3)
Dolby Digital (AC-3) is a digital audio
compression 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 quanti-
ties of audio data can be recorded
efficiently on discs, and since the sound is
digital there is little loss of sound quality.
Center
speaker
Front
speakers
Rear
speakers
Subwoofer
Speaker layout for enjoying
Dolby Digital sound
* The separately sold digital audio
processor (PXA-H510) is required to
enjoy Dolby Digital sound.
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Dolby Pro Logic
Dolby Pro Logic is a Dolby Surround
format which restores four channels of
signals recorded onto two channels back
to four channels (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.
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.