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Most DAB+ receivers have been marketed in Australia with only two lines at most of a graphical display consisting of the station ID, date/time, signal strength and scrolling text. The latter scrolls information such as song information, weather and news information and promotional info about the radio station's talkback.
Scrolling text for news is quite slow and limited to short 'teasers' to the main news bulletinhe. Other than that, I find it very hard to monetise scrolling text. On Toyota's infotainment system, the text information is not displaying fully.
It is true that the DAB+ system can display graphical information. It is also true that the DAB+ system is capable of displaying EPG (program guide) and TEPG (for traffic reports).
I don't believe that introducing a more sophisticated display unit is warranted in cars. It may be of benefit to passengers. For the driver, unless the information on the radio assists in driving, such a rich graphical display will take the driver's attention away from concentrating on the road. It is similar to the road rules preventing the DVD player from running while the car is in operation.
In sum, the driver must concentrate on the road such not to be distracted by the rich graphical capabilities of a car infotainment system's DAB+.
Thank you,
Anthony of exciting Belfield