Alpine 9861 - DVA - DVD Player Owner's Manual page 55

Dolby Pro Logic
Dolby Pro Logic is the technology used to decode programs encoded in
Dolby Surround. Pro logic decoding will provide you with four
channels of sound (front left/right, center and monaural rear surround)
from a 2-channel (stereo) source.
* The separately sold digital audio processor (PXA-H900) is required
to enjoy Dolby Pro Logic surround sound.
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 advanced, 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-H701, 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 DVD function for restricting the viewing age as stipulated by
censorship 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.
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