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Some text descriptions (e.g. menu items, broadcaster information) may be too
long to appear in the display. These will then be shown as scrolling text after a
few moments.
7 The DAB+ (digital radio) function
7.1 What is DAB+?
DAB+ is a new digital format that delivers crystal-clear sound with no background
noise. In contrast to traditional analogue radio stations, DAB+ can be used to
broadcast multiple stations on one and the same frequency. These are called
ensembles or multiplexes. An ensemble consists of the radio station and several
service components or data services that are broadcast by the radio stations. You can
find out more at www.digitalradio.de or www.digitalradio.ch, for example.
7.1.1 Data compression
Digital radio exploits aspects of human hearing for data compression. The human ear
does not detect sounds that are below a certain minimum volume. Data below the
absolute threshold of hearing can therefore be filtered out. This is possible because
the digital data stream also saves the relative volume of each unit of information to
other units. At a specific threshold, the quieter parts of a sound signal are blocked
out by the louder parts. All the sound information below the threshold of hearing
in a