Yamaha RX-V2400 Benutzerhandbuch

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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.

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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.

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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 power amplifier and 
pre-amplifier performance and operation, and hundreds of 
other parameters in both the digital and analog domain.

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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. A 
list of available DVD software titles encoded with this 
technology can be found at www.thx.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.

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ITU-R is the radio communication sector of the ITU 
(International Telecommunication Union). ITU-R 
recommends a standard speaker placement which is used 
in many critical listening rooms, especially for mastering 
purposes.

00_RX-V2400U_EN.book  Page 88  Friday, October 10, 2003  10:54 AM