Blaupunkt Car Multimedia DigiCeiver, Digital radio/DAB Digital Audio Broadcasting, Disc-Naming

Technology

75

Reception with DDA

Vehicle-specific frequency response with DSA+ correction

DigiCeiver

Direct signal Reflection

Amplitude in dB

20

10

0

– 10

– 20

– 30

102 103 104

Frequency in Hz

Technology, whereby the car radio is based on signal/computer processors. The signal is digitally processed from the receiver to the Preamp Out. This affords considerable advantages in terms of reception properties and sound adaptation.

➞SHARX®

Digital radio/DAB – Digital Audio Broadcasting

Digital radio standard that, in contrast to analogue radio signals, makes it possible

Reception range of the automatic DDA directional antenna: the wanted transmitter signal is received, the reflected interference signal is faded out.

In principle, the DDA process mimics the reactions of an extremely quick, automatic directional antenna – similar to TV “rabbit ears” that deliver just “snow” or perfect reception depending on just a small adjust- ment. When used in car radios, the DDA pro- cess works with two independent antennas and receivers, whose signals are digitised using intermediate frequency analogue-digital converters. The digitised data is then fed

to an adaptive algorithm with extremely low settling times. Thus, the two intermediate frequency signals are combined so that the antenna can gain up to 3 dB of antenna power even for weak reception field strengths. In areas with strong reception, the second regular receiver, the so-called RDS back- ground receiver, is then freely available. The switch between DDA operation and RDS background reception is quick and inaudible, controlled by a logic that evaluates the cur- rent reception conditions. This guarantees the radio listeners the best possible recepti- on and rapid frequency switching at all times, without annoying station searches.

DEQ/DEQ+/DSA+

Digital Sound Adjustment

Vehicle-specific frequency response without DSA+ correction

Equalizers that do the thinking for you! The intelligent Blaupunkt equalizers are equipped with a self-adjusting function to automatically optimise sound reproduction. The new DSA+ equalizer is a complete high-performance

24-bit DSP system. The computer has enough power to handle the 4-channel self-adjust- ment of 27 graphic equalizer bands (= 108 bands in total). This creates a sound quality that remains unparalleled to date and can also be adjusted to your personal taste. Signal time alignment for the audio signal guarantees a true-to-life, concert-like pano- rama. Dynamic Noise Covering (DNC) auto- matically adjusts the volume, the equalizer and music dynamics to the current noise background in the vehicle. And this feature not only regulates the level, it also adjusts the sound to the frequency spectrum of the driving noise.

A spectrum analyser, fascinating effect sound options for Club, Stadium, Cathedral, Theatre and Concert as well as sound presets round out the virtually unlimited opportunities to individualize your sound!

Parametric bands in DEQ Max/DEQ Max EX: For particularly easy operation and the out- standing adjustment of the complicated acoustic conditions in modern vehicles, the DEQ Max EX equalizer uses five fully para- metric bands (adjustable mid frequency, quality and level) with an automatic self- adjusting function (in systems with the DEQ Max, the parametric 5-band equalizer requires

to transmit a great deal of data. In addition to audio signals and texts, it is also possible

to transmit programme information in the form of images and HTML pages. Even moving images are possible. With digital radio, many familiar programmes are now available in

CD quality, along with an entire spectrum of completely new stations.

Interference

Should there ever be any problem in the transmission of a digital signal, it is usually only a small part of the information that gets lost. And the listener won’t even notice: the digital correction process simply recreates the original signals. This guarantees inter- ference-free listening enjoyment every time.

Reception convenience

Digital radio programmes are transmitted over just one frequency. This means that, once you have tuned into a programme, you will be able to listen to it anywhere within reception range without having to adjust your set.

Versatility

Even though digital radio is bound to replace FM as the radio standard sooner or later, the Blaupunkt digital radios all still include an FM receiver as well.

Additional reception

In the future, digital radio will also be able to receive such additional multimedia infor- mation as telematics services, information on song titles, weather reports and MP3 files.

Sound quality

Digital radio provides the same excellent

Amplitude		Annoying frequency
in dB
		response peaks
20
		1400
10	125	350
0

– 10

– 20

– 30

102	103	104
Lack of	Lack of
deep bass sound	brilliant trebles

Frequency in Hz

manual adjustment). In addition, you can also choose individually from five pre-defined sound curves for different music styles.

Automatic equalizer adjustment with the DSA Max and DEQ Max EX:

To keep things simple and ensure that the best possible sound is what you get in the end, Blaupunkt has developed an automatic self-adjusting function that measures the pro- blematic frequency response individually in every vehicle. All you have to do is to connect the calibration microphone (comes included with the Bremen MP74 and the Los Angeles

sound quality as a music CD, even at top speed on the motorway.

Future standard

It is already possible to pick up digital radio almost everywhere in Germany. Full coverage is expected to be achieved by 2004. And since digital radio is a European standard, it will be available in all European countries in the future as well.

Programme diversity

Digital radio doesn’t mean you have to make do with fewer programmes. In Germany, there are already more than 150 digital radio

Amplitude in dB

20

10

0

– 10

– 20

– 30

Correction using DSA+ (13 EQ bands)

Frequency

in Hz

102		103	104
Filter 1	Filter 2 Filter 3	Filter 4	Filter 5

MP74) with the ISO connection box and press the AUTO key in the equalizer menu. After just a few seconds, the sound will be noticeably more harmonious, richer in detail with greater differentiation, as the annoying frequency peaks are reliably balanced out. To satisfy personal tastes, all the settings can also be adjusted manually afterwards. Alter- natively, the sound-related or voice-optimised sound preset curves can also be selected.

programmes on air – and that number is growing.

Disc-Naming

This function makes it possible to enter a name for any CD currently playing. This name will then appear in the display each time

the CD is played as long as the corresponding display function has been activated.

Display-Out

Connection option for existing external displays in the car via an optional interface.

DMB – Digital Multimedia

Broadcasting

➞Digital-Radio