Manual Yamaha HTR-5790 (page 87 of 90) (English)

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GLOSSARY

ADDITIONAL

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 theatres 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 power amplifier and

pre-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. 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.

■ CINEMA DSP

Since the Dolby Surround and DTS systems were

originally designed for use in movie theaters, their effect

is best felt in a theater having many speakers and designed

for acoustic effects. Since home conditions, such as room

size, wall material, number of speakers, and so on, can

differ so widely, it’s inevitable that there are differences in

the sound heard as well. Based on a wealth of actually

measured data, YAMAHA CINEMA DSP uses

YAMAHA original sound field technology to combine

Dolby Pro Logic, Dolby Digital and DTS systems to

provide the visual and audio experience of movie theater

in the listening room of your own home.

00_HTR-5790U_EN.book Page 83 Tuesday, December 9, 2003 9:16 AM

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