Read the sentence again: the audio is still analog, but there is a
digital data stream along with it that is used for station
ID/playlist/etc. information. This is different from digital TV, where
the entire signal is digital.
Mike
Art Clemons wrote:
I think you are under a misunderstanding. HD radio is NOT "digital".
It is a proprietary format analog signal with a digital adjunct. See:
<http://en.wikipedia.org/wiki/HD_Radio>
Both IBOC signals are truly digital although on AM, it's a Hybrid
Digital system. Please note that your quoted source to rebut the claim
that HD is digital states:
"HD Radio is the trademark for iBiquity's in-band on-channel (IBOC)
digital radio technology used by AM and FM radio stations to transmit
audio and data via a digital signal in conjunction with their analog
signals.'
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