Yamaha DSP-A595a - Manual (Page 6)

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Dolby Digital
Dolby Digital is the next level of the Dolby Surround sound
system that was developed for 35 mm-film movies by
employing low bit-rate audio coding.
Dolby Digital is a digital surround sound system that provides
completely independent multi-channel audio to you. Dolby
Digital provides five full-range channels in what is sometimes
referred to as a “3/2” configuration: three front channels (left,
center and right), and two surround channels. A sixth bass-only
effect channel is also provided for output of LFE (low frequency
effect), or low bass effects that are independent of other
channels. (This is called the “LFE channel”.) This channel is
counted as 0.1, thus giving rise to the term 5.1 channels in
total.
Compared to Dolby Surround, which is referred to a “3/1”
system (left front, center, right front and just one surround
channel), Dolby Digital features two surround channels, called
stereo or split surrounds, each offering the same full-range
fidelity as the three front channels. By using the built-in Dolby Digital decoder, you can experience
the dramatic realism and impact of Dolby Digital theater sound
in your home.
The wide dynamic range of sound reproduced by the five full-
range channels and precise sound orientation by digital sound
processing provides listeners with excitement and realism that
have never been experienced before.
Dolby Digital forms 5.1 channels as already mentioned, but it
can also form fewer channels, for example 2-channel stereo
and monaural. You may be able to find some 2-channel stereo
and/or monaural sources encoded with Dolby Digital in the
market.
Laser disc and DVD are home audio/video program sources
that could benefit from Dolby Digital. In the near future, Dolby
Digital will also be applied to DBS, CATV and HDTV. The
ongoing release of Dolby Digital theatrical films now underway
will provide an immediate source of Dolby Digital encoded
video software.
Manufactured under license from Dolby Laboratories. “Dolby”,
“Pro Logic” and the double-D symbol are trademarks of Dolby
Laboratories.
DTS Digital Surround
DTS (Digital Theater Systems) was developed to replace
analog soundtracks of movies with six discrete channels of
digital soundtracks, and it is now installed in many theaters
around the world. The DTS digital playback system changed
the way we experienced movies in theaters with six discrete
channels of superb digital audio.
DTS technology, through intense research and development
has made it possible to deliver similar encode/decode discrete
technology to home audio surround-sound entertainment.
DTS Digital Surround is an encode/decode system which
delivers six channels of master-quality, 20-bit audio; technically,
it is 5.1 channels, which means 5 full-range (left, center, right
and two surround) channels, plus a subwoofer (LFE) channel
(as “0.1”). It is compatible with the 5.1 speaker configurations
that are currently available for home theater systems.
The DTS Digital Surround algorithm is designed to encode the
six channels of 20-bit audio on to some laser discs, compact
discs and DVDs with considerably less data compression.
By using the DTS decoder built into this unit, you can
experience the dramatic realism and impact of the DTS-
installed theater’s high quality sound in your home.
Laser disc, compact disc and DVD are home audio formats by
which DTS can present its high-quality multi-channel audio. (In
addition to movies on laser discs, many exciting new multi-
channel music recordings will also become available in the
form of DTS-encoded compact discs.)
Manufactured under license from Digital Theater Systems, Inc.
US Pat. No. 5,451,942 and other world-wide patents issued
and pending. “DTS”, “DTS Digital Surround”, are trademarks of
Digital Theater Systems, Inc. Copyright 1996 Digital Theater
Systems, Inc. All Rights Reserved.
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