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Explanation of terms
A
Adobe RGB color, Adobe YCC601 color
Like x.v.Color, each of these color spaces defines
a palette of available colors that is larger than the
traditional RGB color model.
AL24 Processing Plus
AL24 Processing for All Channels
DENON has further developed its proprietary AL24
Processing, an analog waveform reproduction
technology, to support the 192 kHz sampling
frequency. AL24 Processing Plus, thoroughly
suppresses quantization noise associated with D/A
conversion of LPCM signals to reproduce the low-
level signals with optimum clarity that will bring out
all the delicate nuances of the music.
Equipped foe not only front left and right channels
but also for the surround left and right, center and
subwoofer channels.
Audyssey Dynamic Surround Expansion™
(Audyssey DSX)
Realistic reproduction of sound relies on the
ability of audio systems to match human hearing
performance. Three key requirements are: (1)
frequency response, (2) dynamic range, and (3)
accurate spatial reproduction. The requirements for
frequency response have already been surpassed
with sampling rates that exceed human hearing.
The dynamic range limits of human perception
have also been met with current digital audio
systems operating capable of signal to noise ratios
that approach 120 dB. Accurate spatial sound
rendering, however, has not yet reached the limits
of perception as human perception relies on the
combination of sounds arriving from many more
directions than what 5.1-channel surround sound
systems provide. Audyssey DSX technology was
developed to overcome the spatial sound rendering
limitations faced by 5.1-channel surround sound
formats.
The ITU 5.1-channel channel standard recommends
three front loudspeakers and two rear loudspeakers.
The Left (L) and Right (R) front loudspeakers should
be placed at ±30° relative to the central listening
position. The Center (C) loudspeaker should be at
and the surround loudspeakers (SL, SR) should
be placed between 100° and 120°. All loudspeakers
must be equidistant from the center listening
position or compensated with time delay if that
is not possible. A separate low-frequency effects
(LFE) channel is used to reproduce additional bass
content from the subwoofer.
There are certain things that 5.1-channel surround
sound systems do well compared to 2-channel
stereo. For example, it is possible to move sounds
across the front seamlessly. It is also possible to
create ambience behind the listener. But 5.1 channel
surround systems do not provide enough channels
from which to render the required refl ected
sound components for a seamless and enveloping
soundstage. Unfortunately, the additional two back
surround channels in 7.1-channel systems are not
in the right place to provide a significant perceptual
improvement.
Adding more channels to a surround system is
not for special effects. Accurate spatial sound
reproduction requires rendering of directional
sound cues and non-directional ambient cues.
Refl ections arriving after the direct sound play a
critical role in the perception of soundstage width
and depth. To have the most impact, additional
surround channels should be used to control the
direction, time of arrival, and frequency response
of the refl ected sound to render an expanded
soundstage that reproduces sound with better
localization and envelopment than what 5.1-channel
systems provide.
Research in the perception of auditory source width
has shown that there are strong preferences in the
direction of refl ected sound and the perception of
soundstage width and spaciousness. The single
most important direction of side-wall refl ections
is ±60°. Audyssey DSX provides a pair of Wide
channels (LW and RW) at ±60° with appropriate
frequency response and perceptual processing
to match the requirements of human hearing. In
fact, the Wide channels are much more critical
in the presentation of a realistic soundstage than
then Back Surround channels found in traditional
7.1-channel systems. A more enveloping
7.1-channel system is one in which Wide speakers
are used instead of Back Surround speakers.
Adding surround channels behind the listener has
a very small impact compared to the increase in
envelopment and soundstage width that the front
wide channels will provide.
After side refl ections, the next most important
acoustical and perceptual cues come from refl
ections above the front stage. Audyssey DSX
provides a pair of Height channels (LH and RH) at
a ±45° azimuth angle and elevated to a 45° angle in
the median plane.
In addition to creating new Wide and Height
channels, Audyssey DSX also provides Surround
Processing to enhance the envelopment of the
Surround and Back Surround channels (if present).
Audyssey DSX Surround Processing processes the
standard surround signals in the time and frequency
domains to improve the perceived sense of
envelopment and blending with the other speakers
in the surround system.
Audyssey Dynamic Surround Expansion is a
scalable system that can adapt to the practical
needs of the user. The first level of surround
stage enhancement comes from adding the Wide
channels. The second level comes from adding the
Height channels. If it is practical to have both Wides
and Heights then the surround performance will be
further enhanced. Audyssey DSX automatically
reconfigures its processing to optimize surround
rendering over any number of available speakers
beyond that of 5.1-channel.
Audyssey Dynamic EQ
®
Audyssey Dynamic EQ solves the problem of
deteriorating sound quality as volume is decreased
by taking into account human perception and room
acoustics. Audyssey Dynamic EQ works in tandem
with Audyssey MultEQ XT to provide well-balanced
sound for every listener at any volume level.
Audyssey Dynamic Volume
®
Audyssey Dynamic Volume solves the problem of
large variations in volume level between television
programs, commercials, and between the soft and
loud passages of movies. Audyssey Dynamic EQ
is integrated into Dynamic Volume so that as the
playback volume is adjusted automatically, the
perceived bass response, tonal balance, surround
impression, and dialog clarity remain the same.
Audyssey MultEQ
®
XT
Audyssey MultEQ XT is a room equalization
solution that calibrates any audio system so that
it can achieve optimum performance for every
listener in a large listening area. Based on several
room measurements, MultEQ XT calculates an
equalization solution that corrects for both time
and frequency response problems in the listening
area and also performs a fully automated surround
system setup.
Auto Lip Sync
If you connect the receiver to a TV that supports the
Auto Lip Sync function, it can automatically correct
delay between the audio and video.
D
Deep Color
This technology allows expression of more number
of colors than the conventional 8 bits and can
reproduce colors close to natural ones without color
streak.
DLNA
DLNA and DLNA CERTIFIED are trademarks and/
or service marks of Digital Living Network Alliance.
Some contents may not be compatible with other
DLNA CERTIFIED™ products.
Dolby Digital
Dolby Digital is a multi-channel digital signal format
developed by Dolby Laboratories.
A total of 5.1 channels are played: 3 front channels
(“FL”, “FR” and “C”), 2 surround channels
(“SL” and “SR”) and the “LFE” channel for low
frequencies.
Because of this, there is no crosstalk between
channels and a realistic sound field with a “three-
dimensional” feeling (sense of distance, movement
and positioning) is achieved.
A realistic, powerful sense of presence is achieved
when playing movie sources in AV rooms as well.
Dolby Digital EX
Dolby Digital EX is a 6.1-channel surround format
proposed by Dolby Laboratories that allows users
to enjoy in their homes the “DOLBY DIGITAL
SURROUND EX” audio format jointly developed by
Dolby Laboratories and Lucas Films.
The 6.1 channels of sound, including surround back
channels, provide improved sound positioning and
expression of space.
Dolby Digital Plus
Dolby Digital Plus is an improved Dolby Digital signal
format that is compatible with up to 7.1 channels
of discrete digital sound and also improves sound
quality thanks to extra data bit rate performance.
It is upwardly compatible with conventional Dolby
Digital, so it offers greater flexibility in response to
the source signal and the conditions of the playback
equipment.
107

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