Pioneer VSX-52TX Operating Guide

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Additional information
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En
 
About THX
 
The THX technologies are explained below. See 
www.thx.com for more detailed information.
 
THX Cinema processing
 
THX is an exclusive set of standards and technologies 
established by the world-renowned film production 
company, Lucasfilm 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 conditions.  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 
equipment 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 
headphones 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 channel'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. 
 
THX Select
 
Before any home theatre component can be THX Select 
certified, it must incorporate all the features above and 
also pass a rigorous series of quality and performance 
tests.  Only then can a product feature the THX Select 
logo, which is your guarantee that the Home Theatre 
products you purchase will give you superb performance 
for many years to come. THX Select requirements cover 
every aspect of the product including pre-amplifier and 
power amplifier performance and operation, and 
hundreds of other parameters in both the digital and 
analog domain.
 
THX Surround EX
 
THX Surround EX - Dolby Digital Surround EX is a joint 
development of Dolby Laboratories and the THX Ltd. In a 
movie theater, film soundtracks that have been encoded 
with Dolby Digital Surround EX technology are able to 
reproduce an extra channel which has been added 
during the mixing of the program. This channel, called 
Surround Back, places sounds behind the listener in 
addition to the currently available front left, front center, 
front right, surround right, surround left and subwoofer 
channels. This additional channel provides the 
opportunity for more detailed imaging behind the listener 
and brings more depth, spacious ambience and sound 
localization than ever before. Movies that were created 
using the Dolby Digital Surround EX technology, when 
released into the home consumer market may exhibit 
wording to that effect on the packaging. A list of movies 
created using this technology can be found on the Dolby 
web site at www.dolby.com.
Only receiver and controller products bearing the THX 
Surround EX logo, when in the THX Surround EX mode, 
faithfully reproduce this new technology in the home.
This product may also engage the “THX Surround EX” 
mode during the playback of 5.1 channel material that is 
not Dolby Digital Surround EX encoded. In such case the 
information delivered to the Surround Back channel will 
be program dependent and may or may not be very 
pleasing depending on the particular soundtrack and the 
tastes of the individual listener.
 
THX is a trademark or registered trademark of THX Ltd. 
Surround EX is a jointly developed technology of THX and 
Dolby Laboratories and is a trademark of Dolby 
Laboratories. Used under authorization. All rights reserved.
VSX_52TX.book.fm 76 ページ 2004年5月14日 金曜日 午前9時21分