Denon AVC-A1SR Instrucciones De Operación página 39

decoder developed by DTS, thereby achieving surround sound more faithful to the producer's sound design
aims than with conventional 5.1- or 6.1-channel systems.
In addition, the bit stream format is 100% compatible with conventional DTS signals, so the effect of the
Matrix 6.1 format can be achieved even with 5.1-channel signal sources. Of course it is also possible to play
DTS-ES Matrix 6.1 encoded sources with a DTS 5.1-channel decoder.
When DTS-ES Discrete 6.1 or Matrix 6.1 encoded sources are decoded with a DTS-ES decoder, the format
is automatically detected upon decoding and the optimum playing mode is selected. However, some Matrix
6.1 sources may be detected as having a 5.1-channel format, so the DTS-ES Matrix 6.1 mode must be set
manually to play these sources.
(For instructions on selecting the surround mode, see page 28.)
The DTS-ES decoder includes another function, the DTS Neo:6 surround mode for 6.1-channel playback of
digital PCM and analog signal sources.
TM
2 DTS Neo:6 surround
This mode applies conventional 2-channel signals to the high precision digital matrix decoder used for DTS-
ES Matrix 6.1 to achieve 6.1-channel surround playback. High precision input signal detection and matrix
processing enable full band reproduction (frequency response of 20 Hz to 20 kHz or greater) for all 6.1
channels, and separation between the different channels is improved to the same level as that of a digital
discrete system.
DTS Neo:6 surround includes two modes for selecting the optimum decoding for the signal source.
• DTS Neo:6 Cinema
This mode is optimum for playing movies.
performance to achieve the same atmosphere with 2-channel sources as with 6.1-channel sources.
This mode is effective for playing sources recorded in conventional surround formats as well, because the
in-phase component is assigned mainly to the center channel (C) and the reversed phase component to
the surround (SL, SR and SB channels).
• DTS Neo:6 Music
This mode is suited mainly for playing music. The front channel (FL and FR) signals bypass the decoder
and are played directly so there is no loss of sound quality, and the effect of the surround signals output
from the center (C) and surround (SL, SR and SB) channels add a natural sense of expansion to the sound
field.
(4) DTS 96/24
The sampling frequency, number of bits and number of channels used for recording of music, etc., in studios
has been increasing in recent years, and there are a growing number of high quality signal sources, including
96 kHz/24 bit 5.1-channel sources.
For example, there are high picture/sound quality DVD video sources with 96 kHz/24 bit stereo PCM audio
tracks.
However, because the data rate for these audio tracks is extremely high, there are limits to recording them
on two channels only, and since the quality of the pictures must be restricted it is common to only include
still pictures.
In addition, 96 kHz/24 bit 5.1-channel surround is possible with DVD audio sources, but DVD audio players
are required to play them with this high quality.
DTS 96/24 is a multi-channel digital signal format developed by Digital Theater Systems Inc. in order to deal
with this situation.
Conventional surround formats used sampling frequencies of 48 or 44.1 kHz, so 20 kHz was about the
maximum playback signal frequency. With DTS 96/24, the sampling frequency is increased to 96 or 88.2 kHz
to achieve a wide frequency range of over 40 kHz.
In addition, DTS 96/24 has a resolution of 24 bits, resulting in the same frequency band and dynamic range
as 96 kHz/24 bit PCM.
As with conventional DTS Surround, DTS 96/24 is compatible with a maximum of 5.1 channels, so sources
recorded using DTS 96/24 can be played in high sampling frequency, multiple channel audio with such normal
media as DVD videos and CDs.
Thus, with DTS 96/24, the same 96 kHz/24 bit multi-channel surround sound as with DVD-Audio can be
achieved while viewing DVD-Video images on a conventional DVD-Video player (
96/24 compatible CDs, 88.2 kHz/24 bit multi-channel surround can be achieved using normal CD/LD players
( 1).
Even with the high quality multi-channel signals, the recording time is the same as with conventional DTS
surround sources.
What's more, DTS 96/24 is fully compatible with the conventional DTS surround format, so DTS 96/24 signal
sources can be played with a sampling frequency of 48 kHz or 44.1 kHz on conventional DTS or DTS-ES
Decoding is performed with emphasis on separation
1). Furthermore, with DTS
surround decoders ( 2).
1: A DVD player with DTS digital output capabilities (for CD/LD players, a player with digital outputs
for conventional DTS CDs/LDs) and a disc recorded in DTS 96/24 are required.
2: The resolution is 24 or 20 bits, depending on the decoder.
(5) Home THX Cinema surround mode
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 theaters and in your home theater, as faithful as possible to what the director
intended.
Movie soundtracks are mixed in special movie theaters called dubbing stages and are designed to be played
back in movie theaters with similar equipment and conditions. The soundtrack created for movie theaters is
then transferred directly onto Laserdisc, VHS tape, DVD, etc., and is not changed for playback in a small
home theater environment.
THX engineers developed patented technologies to accurately translate the sound from the movie theater
environment into the home, correcting the tonal and spatial errors that occur. On the AVC-A1SR, when the
Home THX Cinema mode is on, THX processing is automatically added after the Dolby Pro Logic, Dolby
Digital or DTS decoder:
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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 are 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.
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Timbre Matching
The human ear changes our perception of a sound depending on the direction from which the sound is
coming. In a movie theater, there is an array of surround speakers so that the surround information is all
around you. In a home theater, only two speakers located to the side of your head are used. 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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Adaptive Decorrelation
In a movie theater, a large number of surround speakers help create an enveloping surround sound
experience, while in a home theater 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 theater.
TM
THX Ultra
Before any home theater component can be THX Ultra 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
Ultra logo, which is your guarantee that the Home Theater products you purchase will give you superb
performance for many years to come. THX Ultra requirements cover every aspect of the product including
power amplifier performance, pre-amplifier performance and operation, as well as hundreds of other
parameters in both the digital and analog domain.
In addition to improvements to the power amplifier with respect to previous THX Ultra standards, two
surround modes have been added: the THX Ultra2 Cinema mode and the THX MusicMode.
THX Ultra2 Cinema
THX Ultra2 Cinema mode plays 5.1 movies using all 8 speakers giving you the best possible movie watching
experience. In this mode, new THX processing blends the side surround speakers and back surround
speakers providing the optimal mix of ambient and directional surround sounds.
DTS-ES (Matrix and 6.1 Discrete) and Dolby Digital Surround EX encoded soundtracks will be automatically
detected in Ultra2 Cinema mode if the appropriate flag has been encoded.
Some Dolby Digital Surround EX soundtracks are missing the digital flag that allows automatic switching. If
you know that the movie that you are watching is encoded in Surround EX, you can manually select the THX
Surround EX playback mode, otherwise THX Ultra2 Cinema mode will apply processing to provide optimum
replay.
THX MusicMode
For the replay of 5.1 multi-channel music the THX MusicMode should be selected. In this mode new THX
processing is applied to the surround channels of all 5.1 encoded music sources such as DTS and Dolby
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