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Additional information
Surround sound formats
Below is a brief description of the main surround sound formats you’ll find on BDs, DVDs, satellite, cable and
terrestrial broadcasts, and video cassettes.
Dolby
The Dolby technologies are explained below. See http://www.dolby.com for more detailed information.
Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic”, “Surround EX” and the double-D symbol
are trademarks of Dolby Laboratories.
DTS
The DTS technologies are explained below. See http://www.dts.com for more detailed information.
Manufactured under license under U.S. Patent No’s: 5,956,674; 5,974,380; 5,978,762; 6,487,535; 6,226,616;
7,212,872; 7,003,467; 7,272,567; 7,668,723; 7,392,195; 7,930,184; 7,333,929; 7,548,853; 7,283,634 & other U.S. and
worldwide patents issued and pending. DTS-HD, the Symbol, & DTS-HD and the Symbol together are registered
trademarks & DTS-HD Master Audio is a trademark of DTS, Inc. Product includes software.
©
DTS, Inc. All Rights
Reserved.
About THX
The THX technologies are explained below.
See http://www.thx.com for more detailed information.
THX, the THX logo and Select2 Plus are trademarks of THX Ltd. which are registered in some jurisdictions. All rights
reserved. All other trademarks are the property of their respective owners.
THX Cinema processing
THX is an exclusive set of standards and technologies established by THX Ltd. THX grew from George Lucas’
personal desire to make your experience of the film soundtrack, in both movie theatres and in your home theatre,
as faithful as possible to what the director intended. Movie soundtracks are mixed in special movie theatres
called dubbing stages and are designed to be played back in movie theatres with similar equipment and condi-
tions. This same soundtrack is then transferred directly onto Laserdisc, VHS tape, DVD, etc., and is not changed
for playback in a small home theatre environment. THX engineers developed patented technologies to accurately
translate the sound from the movie theatre environment into the home, correcting the tonal and spatial errors
that occur. On this product, when the THX indicator is on, THX features are automatically added in Cinema
modes (e.g. THX Cinema, THX Surround EX).
Re-Equalization
The tonal balance of a film soundtrack will be excessively bright and harsh when played back over audio equip-
ment in the home because film soundtracks were designed to be played back in large movie theaters using
very different professional equipment. Re-Equalization restores the correct tonal balance for watching a movie
soundtrack in a small home environment.
Timbre Matching
The human ear changes our perception of a sound depending on the direction from which the sound is coming.
In a movie theatre, there is an array of surround speakers so that the surround information is all around you. In
a home theatre, you use only two speakers located to the side of your head. The Timbre Matching feature filters
the information going to the surround speakers so that they more closely match the tonal characteristics of the
sound coming from the front speakers. This ensures seamless panning between the front and surround speakers.
Adaptive Decorrelation
In a movie theatre, a large number of surround speakers help create an enveloping surround sound experience,
but in a home theatre there are usually only two speakers. This can make the surround speakers sound like head-
phones that lack spaciousness and envelopment. The surround sounds will also collapse into the closest speaker
as you move away from the middle seating position. Adaptive Decorrelation slightly changes one surround chan-
nel’s time and phase relationship with respect to the other surround channel. This expands the listening position
and creates-with only two speakers- the same spacious surround experience as in a movie theatre.
