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THX Surround EX: 6.1 output with Dolby Digital Surround EX
Processing: Re-Equalization,Timbre Matching
THX Surround EX – Dolby Digital Surround EX is a joint development of Dolby
Laboratories and the THX division of Lucasfilm 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, but
named Rear in the AVM 50), places sounds behind the listener in addition to the
currently available L-Front, Center, R-Front, R-Surround, L-Surround 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 may
exhibit wording to that effect on the packaging when released on DVD. A list of
movies created using this technology can be found on the Dolby web site at
www.dolby.com. A list of DVD titles encoded with this technology can be found on
the THX web site at www.thx.com.
Bearing the THX Surround EX logo, the AVM 50 will faithfully reproduce this
technology in the home when in THX Surround EX mode.
The AVM 50 also allows you to engage THX Surround EX during playback of
5.1-channel material that is not encoded with Dolby Digital Surround EX. The
information delivered to the Rear channel will be program dependent and may or
may not be pleasing depending on the soundtrack and your listening tastes.
In compliance with THX requirements, Bass/Treble, Surround Mode Level, and Balance adjustments are
r
eset to 0 dB whenever a THX mode is selected, after which you can make adjustments with THX
engaged if you wish to do so. When THX is turned ‘Off’, previous settings are restored, except for
Balance (see sections 4.6 and 4.7). Also note that due to the nature of digital bitstreams, adjustments
made while THX is engaged will be reset to 0 dB if the program is paused for longer than 3 seconds.
Outputs indicated are the number of output channels as follows:
6.1 = L-Front, Center, R-Front, R-Surround, Rear*, L-Surround, LFE/Subwoofer
7.1 = L-Front, Center, R-Front, R-Surround, R-Rear, L-Rear, L-Surround, LFE/Subwoofer
*If two rear speakers are used, the same Rear channel information goes to both.
4. OPERATION continued …
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