7 DAB+ (digital radio) function
7.1 What is DAB+?
DAB+ is a new digital format through which crystal clear sound with no noise can
be heard. In contrast to conventional analogue radio stations, DAB+ can be used to
broadcast multiple stations on one and the same frequency. This is referred to as
an ensemble or multiplex. An ensemble is comprised of the radio station, as well as
several service components or data services, which are broadcast individually by the
radio stations. There is information at www.digitalradio.de or www.digitalradio.ch, for
example.
7.1.1 Data compression
With this, digital radio takes advantage of the properties of human hearing. The
human ear does not perceive sounds which are found under a specific minimum
volume. Data which are found under the so-called audibility threshold can, therefore,
be filtered out. This is possible because, in a digital data stream, the relevant relative
volume for other units is saved for every unit of information. Moreover, in an audio
signal, the quieter parts are superimposed by louder ones at a specific limit value.
All the sound information below the threshold of hearing in a piece of music can be
filtered out of the signal to be broadcast. This leads to a reduction of data in the data
stream to be transmied, with no perceptible dierence in sound for the listener (HE
AAC v2 - supplementary codification process for DAB+).
7.1.2 Audio stream
With digital radio, audio streams are continuous data streams which contain the
MPEG 1 audio layer 2 frames and thereby represent acoustic information. This
enables standard radio channels to be broadcast and listened to on the receiver
side. Digital radio provides you not only with excellent sound quality radio but also
additional information. This may refer to the programme being broadcast or be
independent information (e.g. news, weather, trac, tips).
7.2 DAB+ (digital radio) reception
> Briefly press the /Mode buon until [Digital Radio] appears on the display.
If DAB+ is being started for the first time, a complete scan will be performed.
Aer completing the scan, the first station in alphanumerical order will be
played.
7.2.1 Performing a complete scan
The automatic scan [Complete Scan] scans all DAB+ band III channels and
thereby finds all stations being broadcast within the reception area.
Aer completing the scan, the first station in alphanumerical order will be
played.
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EN
FR
IT
NL
NW
DK
PL
CZ
SK
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