Manual Technisat DigitRadio UP1 (page 15 of 292) (English, Dutch, Danish, French, Italian, Polish, Norwegian)

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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 transmied, with no perceptible dierence 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, trac, tips).

7.2 DAB+ (digital radio) reception

> Brieﬂy press the /Mode buon until [Digital Radio] appears on the display.

If DAB+ is being started for the ﬁrst time, a complete scan will be performed.

Aer 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.

Aer completing the scan, the ﬁrst station in alphanumerical order will be

played.

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Technisat DigitRadio UP1 Manual

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