M. Adam Davis wrote:
> It is likely that the radio data service patent holders require this. 
> If the chip simply demodulates the digital signal and presents the
> data as-is, then one must be privy to the protocol.
>
> -Adam
>
>   

Isn't the RDS protocol a published standard, both the US and the 
European versions?

It's just a matter of paying the fees for a copy of the standard from 
the standards entity.

Of course, implementations of the standards may involve patents or other 
IPR, but the actual standards themselves are open documents, subject to 
paying the copying charge.

Jack
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