NABO DAB EASY, Operating Manual

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64 Operating Manual
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7.1.1 Data compression
Digital radio makes use of the effects of human hearing. The human
ear does not perceive sounds below a certain minimum volume.
Data below the so-called resting hearing threshold can therefore
be filtered out. This is possible because the relative volume to other
units is stored in a digital data stream for each data unit. In a single
sound signal, at a certain threshold value, the quieter components
are superimposed by the louder components. All sound information
in a piece of music that falls below the so-called listening threshold
can be filtered out of the signal to be transmitted. This leads to a
reduction of the data stream to be transmitted, without any notice-
able sound difference for the listener (HE AAC v2 -method as
supplementary coding method for DAB+).
7.1.2 Audio stream
Audio streams in Digital Radio are continuous data streams that
contain MPEG 1 Audio Layer 2 frames and thus represent acoustic
information. This allows familiar radio programmes to be trans-
mitted and listened to by the receiver. Digital Radio brings you not
only radio in excellent sound quality, but also additional information.
These can refer to the current programme or be independent of it
(e.g. news, weather, traffic, tips).
7.2 DAB+ (Digital Radio) reception
> Keep pressing the MODE button (1) until [DAB] is displayed. When
starting DAB+ for the first time, a complete station scan is run.
Make sure that the telescopic antenna is fully extended during
this process. After a search cycle is completed, the first station in
alphabetical order is played.
7.2.1 Running a complete search scan
The full scan searches for all DAB+Band III channels and finds all
stations broadcast in the coverage area.
After a search cycle is completed, the first station in alphabetical
order is played.
6. MENU OPERATION