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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 Digital Theater Systems,
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 Systems.
Dolby Pro Logic II
Dolby Pro Logic II provides
multichannel surround sound from any
2 channel source. It reproduces
extended bandwidth playback with 5.1
channels. This is made possible by an
advanced matrix surround decoder.
This new decoder is able to draw out
spatial characteristics of the recording
without adding tonal coloration or
artificial delays that did not exist in the
original.
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.