Dolby Surround; Dolby Digital; Glossary; Digital Surround - Yamaha RX-SL100RDS Mode D'emploi

GLOSSARY

Dolby Surround

Dolby Surround uses a 4 channel analog recording system
to reproduce realistic and dynamic sound effects: 2 front
left and right channels (stereo), a center channel for dialog
(monaural), and a surround channel for special sound
effects (monaural). The surround channel reproduces
sound within a narrow frequency range.
Dolby Surround is widely used with nearly all video tapes
and laser discs, and in many TV and cable broadcasts as
well. The Dolby Pro Logic decoder built into this unit
employs a digital signal processing system that
automatically stabilizes the volume on each channel to
enhance moving sound effects and directionality.

Dolby Digital

Dolby Digital is a digital surround sound system that gives
you completely independent multi-channel audio. With 3
front channels (left, center, and right), and 2 surround
stereo channels, Dolby Digital provides 5 full-range audio
channels. With an additional channel especially for bass
effects, called LFE (low frequency effect), the system has
a total of 5.1 channels (LFE is counted as 0.1 channel). By
using 2-channel stereo for the surround speakers, more
accurate moving sound effects and surround sound
environment are possible than with Dolby Surround. The
wide dynamic range (from maximum to minimum
volume) reproduced by the 5 full-range channels and the
precise sound orientation generated using digital sound
processing provide listeners with previously unheard of
excitement and realism.
With this unit, any sound environment from monaural up
to a 5.1-channel configuration can be freely selected for
your enjoyment.
Dolby Digital EX creates 6 full-bandwidth output
channels from 5.1-channel sources. This is done using a
matrix decoder that derives 3 surround channels from the
2 in the original recording. For the best results, Dolby
Digital EX should be used with movie sound tracks
recorded with Dolby Digital Surround EX. With this
additional channel, you can experience more dynamic and
realistic moving sound especially with scenes with
"flyover" and "fly-around" effects.
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GLOSSARY
Dolby Pro Logic II
Dolby Pro Logic II is an improved technique used to
decode vast numbers of existing Dolby Surround software.
This new technology enables a discrete 5-channel
playback with 2 front left and right channels, 1 center
channel, and 2 surround left and right channels (instead of
only 1 surround channel for conventional Pro Logic
technology). A music mode is also available for 2-channel
sources in addition to the movie mode.
Dolby Pro Logic IIx
Dolby Pro Logic IIx is a new technology enabling discrete
7.1-channel playback from 2-channel or multi-channel
sources. There is a Music mode for music, a Movie mode
for movies and a Game mode for games.
DTS (Digital Theater Systems)

Digital Surround

DTS digital surround was developed to replace the analog
soundtracks of movies with a 6-channel digital sound
track, and is now rapidly gaining popularity in movie
theaters around the world. Digital Theater Systems, Inc.
has developed a home theater system so that you can enjoy
the depth of sound and natural spatial representation of
DTS digital surround in your home. This system produces
practically distortion-free 6-channel sound (technically, a
left, right and center channels, 2 surround channels, plus
an LFE 0.1 channel as a subwoofer, for a total of 5.1
channels).
The unit incorporates DTS-ES decoder that enables 6.1-
channel reproduction by adding the surround back channel
to existing 5.1-channel format.
Neo:6
Neo:6 decodes the conventional 2-channel sources for 6
channel playback by the specific decoder. It enables
playback with the full-range channels with higher
separation just like digital discrete signal playback. Two
modes are available; "Music mode" for playing music
sources and "Cinema mode" for movies.
LFE 0.1 channel
This channel is for the reproduction of low bass signals.
The frequency range for this channel is 20 Hz to 120 Hz.
This channel is counted as 0.1 because it only enforces a
low frequency range compared to the full-range
reproduced by the other 5/6 channels in a Dolby Digital or
DTS 5.1/6.1 channel systems.