Sennheiser MM450 Instruction Manual download pdf (Page 27)

apt-X audio coding

26 | MM 450-X

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’s transparent, non-destructive approach ensures that every fre-

quency 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 syn-

chronization 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

wireless audio ensuring seamless integration when used with video

devices.

• apt-X encoded audio fits neatly within the available bandwidth of wire-

less transmission standards to offer an efficient solution for band-

width-restricted connections.

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Sennheiser MM450 Instruction Manual Page 27