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apt-X audio coding
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apt-X key features:
• Blind listening tests with industry reference audiences have shown
that apt-X over Bluetooth is indistinguishable from audio delivered
over wired technology. Unlike psychoacoustic-based technologies such
as MP3 or AAC, apt-X can be used to transport audio without degrading
the audio quality. With MPEG/AAC compression, the encoding process
is destructive and content perceived as “irrelevant” is discarded. apt-X
transparent, non-destructive approach ensures that 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.
• The overall framework of apt-X ensures a high degree of resilience to
random bit errors, with the bit error response well matched to the audi-
tory response of the human ear. apt-X 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 compression tech-
nology. Many current wireless devices suffer from unwanted delays
which cause lip-sync issues, apt-X can enable real-time delivery of wire-
less audio ensuring seamless integration when used with video
devices.
• apt-X encoded audio fits neatly within the available bandwidth of
wireless transmission standards to offer an efficient solution for band-
width-restricted connections.