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DAB (Digital
Audio Broadcasting) is the next generation of radio.
DAB uses digital compression techniques to transform the source material, i.e. music and speech,
into digital code before it is transmitted.
The code consists of electronic ‘ones and zeros’
called binary
digits or bits.
The binary code is then multiplexed or grouped together to create a superior signal, when
compared with the older analogue system, with the following key bene
ts:
Near CD quality sound.
Because DAB is binary coded, the receiving equipment is only expecting to receive a series of ones
and zeros, so any other interference is ignored, resulting in very high quality audio.
Interference free reception.
Analogue systems suf
fer from an ef
fect called ‘multipath distortion’.
This is caused because waves
do not behave in an orderly fashion, but bounce and ref
lect of
f buildings etc. DAB sees this as an
advantage and uses the direct and reflected signals to actually reinforce the end result.
No need to re-tune.
A
single DAB frequency can be used to cover the whole of the UK, so solving many of the
problems experienced with the earlier analogue system. DAB can automatically tune-in all of the
available stations in your area.
What is Digital Radio?
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