Marantz sr4500 Service Manual page 7

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
drives 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.
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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