Sennheiser Electronic Corp HD4BT4 Manuel D’Utilisation
URBANITE XL Wireless -
Bluetooth headset
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Valuable information – aptX audio coding
Outstanding audio quality
aptX technology is what wireless audio has been waiting
for. With aptX audio coding, you can be assured of crisp,
pure and full stereo sound. It allows you to not only hear,
but experience and feel the audio as it was intended. Uti-
lizing aptX,
for. With aptX audio coding, you can be assured of crisp,
pure and full stereo sound. It allows you to not only hear,
but experience and feel the audio as it was intended. Uti-
lizing aptX,
Bluetooth can now offer wireless audio quality
that is indistinguishable from the highest quality wired
connection.
connection.
Professional grade sound
Until now, aptX has been the best-kept secret of the pro-
fessional audio industry. From major public broadcasters
to film production studios, aptX is used throughout the
world to transmit high quality digital audio from A to Z in
real-time. It was developed to meet the exacting standards
of musicians and audio engineers who love the exceptional
dynamic range and high fidelity it provides.
fessional audio industry. From major public broadcasters
to film production studios, aptX is used throughout the
world to transmit high quality digital audio from A to Z in
real-time. It was developed to meet the exacting standards
of musicians and audio engineers who love the exceptional
dynamic range and high fidelity it provides.
Now available on selected consumer devices, the tech-
nology ensures that music lovers everywhere can stream
the rich listening experience that only aptX can deliver.
nology ensures that music lovers everywhere can stream
the rich listening experience that only aptX can deliver.
Revolutionizing Bluetooth listening
Bluetooth technology has revolutionized our communica-
tions and lifestyle by eliminating troublesome wires and
letting us get on with life “on the move”. Listening to a
mobile phone conversation on a
tions and lifestyle by eliminating troublesome wires and
letting us get on with life “on the move”. Listening to a
mobile phone conversation on a
Bluetooth earpiece sounds
just fine but when it comes to delivering full stereo sound, a
little extra help is required. aptX works within
little extra help is required. aptX works within
Bluetooth to
deliver CD quality audio, ensuring you are getting the most
from your wireless listening experience.
from your wireless listening experience.
In order to deliver two-channel digital sound within the
Bluetooth A2DP profile, audio compression is necessary.
While traditional audio compression technologies struggle
to provide full-bandwidth, high-fidelity audio over
Bluetooth A2DP profile, audio compression is necessary.
While traditional audio compression technologies struggle
to provide full-bandwidth, high-fidelity audio over
Blue-
tooth, aptX works to ensure you enjoy the fullest, richest
sound your music collection has to offer.
sound your music collection has to offer.
aptX legacy
If you have ever been to the movies or listened to the radio
then chances are you’ll already have heard aptX in action.
Over 20,000 radio stations across the world and thousands
of cutting-edge film studios rely on aptX for high quality
audio delivery.
then chances are you’ll already have heard aptX in action.
Over 20,000 radio stations across the world and thousands
of cutting-edge film studios rely on aptX for high quality
audio delivery.
The digital compression technology now known as aptX
was originally developed in Queen’s University, Belfast,
Northern Ireland. The technology was first brought to
market for radio automation applications to store CD
quality audio on computer hard drives for direct playout
during radio shows, hence automating the process of the
disc jockey.
was originally developed in Queen’s University, Belfast,
Northern Ireland. The technology was first brought to
market for radio automation applications to store CD
quality audio on computer hard drives for direct playout
during radio shows, hence automating the process of the
disc jockey.
The acclaim the technology received lead to further re-
search and development and throughout the 1990s the
technology was used by Broadcast and Post-production
studios worldwide to deliver high-fidelity, low latency
audio in situations where bandwidth was limited. The same
core principles that have earned aptX worldwide acclaim
in the Broadcast and Post-Production markets make it the
perfect solution for delivering high quality audio on wire-
less devices. aptX is leading the way in bringing pro-audio
quality to the discerning consumer.
search and development and throughout the 1990s the
technology was used by Broadcast and Post-production
studios worldwide to deliver high-fidelity, low latency
audio in situations where bandwidth was limited. The same
core principles that have earned aptX worldwide acclaim
in the Broadcast and Post-Production markets make it the
perfect solution for delivering high quality audio on wire-
less devices. aptX is leading the way in bringing pro-audio
quality to the discerning consumer.
aptX key features:
Blind listening tests with industry reference audiences
have shown that aptX over
have shown that aptX over
Bluetooth is indistinguishable
from audio delivered over wired technology. Unlike psycho-
acoustic-based technologies such as MP3 or AAC, aptX can
be used to transport audio without degrading the audio
quality. With MPEG/AAC compression, the encoding pro-
cess is destructive and content perceived as “irrelevant” is
discarded.
acoustic-based technologies such as MP3 or AAC, aptX can
be used to transport audio without degrading the audio
quality. With MPEG/AAC compression, the encoding pro-
cess is destructive and content perceived as “irrelevant” is
discarded.
aptX’s transparent, non-destructive approach ensures that
every frequency present in the original signal is preserved
in the encoded and decoded signal.
every frequency present in the original signal is preserved
in the encoded and decoded signal.
Dynamic range of >92 dB for 16 bit audio and >120 dB for
24 bit audio.
24 bit audio.
The overall framework of aptX ensures a high degree of re-
silience to random bit errors, with the bit error response
well matched to the auditory response of the human ear.
aptX employs connection and synchronization techniques
to ensure a robust connection and enable delivery of audio
even under stressful conditions.
silience to random bit errors, with the bit error response
well matched to the auditory response of the human ear.
aptX employs connection and synchronization techniques
to ensure a robust connection and enable delivery of audio
even under stressful conditions.
Shortest processing delay of any professional audio com-
pression technology. Many current wireless devices suffer
from unwanted delays which cause lip-sync issues, aptX
can enable real-time delivery of wireless audio ensuring
seamless integration when used with video devices.
pression technology. Many current wireless devices suffer
from unwanted delays which cause lip-sync issues, aptX
can enable real-time delivery of wireless audio ensuring
seamless integration when used with video devices.
aptX encoded audio fits neatly within the available band-
width of wireless transmission standards to offer an
efficient solution for bandwidth-restricted connections.
width of wireless transmission standards to offer an
efficient solution for bandwidth-restricted connections.
Valuable information – aptX audio coding