] Digital Radio - Well
Broadcast
This has been going on for over 25 years that I know
of.
But I don't think it was digital. AM and FM radio
had a
service for the blind that was a sub carrier. Sounds
very
close to it.
At 06:29 PM 11/12/2007, you wrote:
In the U.S. the FCC has approved
In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to
add digitial audio to existing AM and FM stations. In broadcast radio, there
isn't the luxury of unused channels that allow every station to have one analog
and one digital transmitter. I haven't seen any terrestrial
There are several broadcast stations in my local area that are
digital, one local shop sells receivers. The content is fairly poor
at the moment, each stations carries their existing FM or medium wave
stations and then the extra channels are a syndicated radio service
offering themes like Jazz,
This has been going on for over 25 years that I know of.
But I don't think it was digital. AM and FM radio had a
service for the blind that was a sub carrier. Sounds very
close to it.
At 06:29 PM 11/12/2007, you wrote:
In the U.S. the FCC has approved a system called IBOC (In-Band On Channel)
: [digitalradio] Digital Radio - Well Broadcast
This has been going on for over 25 years that I know of.
But I don't think it was digital. AM and FM radio had a
service for the blind that was a sub carrier. Sounds very
close to it.
At 06:29 PM 11/12/2007, you wrote:
In the U.S. the FCC has
The SCA (Subsidiary Communications Authority) was a sub-carrier quite a
distance from the main carrier and was not detected by the standard FM
receiver. The audio quality was very low. I think the maximum was only
8000 Hz or something relatively modest but worked well for speech.
The IBOC (In
