Marantz SR5500 Series Service Manual page 6

Dolby Digital identifies the use of Dolby Digital audio coding
for such consumer formats as DVD and DTV. As with film
sound, Dolby Digital can provide up to five full-range
channels for left, center, and right screen channels,
independent left and right surround channels, and a sixth
(".1") channel for low-frequency effects.
Dolby Surround Pro Logic II is an improved matrix decoding
technology that provides better spatiality and directionality
on Dolby Surround program material; provides a convincing
three-dimensional soundfield on conventional stereo music
recordings; and is ideally suited to bring the surround
experience to automotive sound. While conventional
surround programming is fully compatible with Dolby
Surround Pro Logic II decoders, soundtracks will be able to
be encoded specifically to take full advantage of Pro Logic II
playback, including separate left and right surround
channels. (Such material is also compatible with
conventional Pro Logic decoders.)
Dolby Digital EX creates six full-bandwidth output channels
from 5.1-channel sources. This is done using a matrix
decoder that derives three surround channels from the two
in the original recording. For best results, Dolby Digital EX
should be used with movies soundtracks recorded with
Dolby Digital Surround EX.
About Dolby Pro Logic IIx
Dolby Pro Logic IIx technology delivers a natural and
immersing 7.1-channel listening experience to the home
theater environment. A product of Dolby's expertise in
surround sound and matrix decoding technologies, Dolby
Pro Logic IIx is a complete surround sound solution that
maximizes the entertainment experience from stereo as well
as 5.1-channel encoded sources.
Dolby Pro Logic IIx is fully compatible with Dolby Surround
Pro Logic technology and can optimally decode the
thousands of commercially available Dolby Surround
encoded video cassettes and television programs with
enhanced depth and spatiality. It can also process any high-
quality stereo or Advanced Resolution 5.1-channel music
content into a seamless 6.1- or 7.1-channel listening
experience.
The Dolby Headphone technology provides a surround sound
listening experience over headphones.
When listening to multichannel content such as DVD movies
over headphones, the listening experience is fundamentally
different than listening to speakers. Since the headphone
speaker drivers are covering the pinna of the ear, the
listening experience differs greatly from traditional speaker
playback. Dolby utilizes patented headphone perspective
curves to solve this problem and provides a non-fatiguing,
immersive, home theater listening experience. Dolby
Headphone also delivers exceptional 3D audio from stereo
material.
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic", and the double-D symbol are
trademarks of Dolby Laboratories.
Circle Surround II (CS-II) is a powerful and versatile
multichannel technology. CS-II is designed to enable up to
6.1 multichannel surround sound playback from mono,
stereo, CS encoded sources and other matrix encoded
sources. In all cases the decoder extends it into 6 channels
of surround audio and a LFE/subwoofer signal. The CS-II
decoder creates a listening environment that places the
listener "inside" music performances and dramatically
improves both hi-fi audio conventional surround-encoded
video material. CS-II provides composite stereo rear
channels to greatly improve separation and image
positioning – adding a heightened sense of realism to both
audio and A/V productions.
CS-II is packed with other useful feature like dialog clarity
(SRS Dialog) for movies and cinema-like bass enrichment
(TruBass). CS-II can enable the dialog to become clearer
and more discernable in movies and it enables the bass
frequencies contained in the original programming to more
closely achieve low frequencies – overcoming the low
frequency limitations of the speakers by full octave.
Circle Surround II, Dialog Clarity, TruBass, SRS and
symbol are trademarks of SRS Labs, Inc.
Circle Surround II, Dialog Clarity and TruBass technology
are incorporated under license from SRS Labs, Inc.
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