Hyundai 2012 Sonata - Manual (Page 208)

Features of your vehicle
126 4
HD RADIO TM INFORMATION
Licensing information
HD Radio TM Technology Manufactured
Under License From iBiquity Digital
Corporation. U.S. and Foreign Patents.
HD Radio
TM and the HD and HD Radio
logos are proprietary trademarks of
iBiquity Digital Corporation.
Availability information
HD Radio TM reception is available in the
United States, including Alaska and
Hawaii.
What is HD Radio TM technology?
The vehicle audio system (if equipped) is
able to receive standard analog FM/AM
radio broadcasting as well as digital HD
Radio
TM FM/AM broadcasting.
HD Radio TM technology provides digital
and analog reception using existing FM
and AM broadcasting frequencies.
Currently, radio stations broadcasting an
HD Radio
TM signal are operating in a
hybrid mode of both, analog and digital,
in order to reach both receivers. In both
modes, analog and digital, the broad-
casted program contents is the
same(except of multicasting, see below).
Eventually, as analog receivers are
replaced by digital ones, radio stations
may be able to turn off their analog
broadcasting and use only digital broad-
casting.
Multicasting
HD Radio TM FM stations are able to broad-
cast multiple digital program
streams(channels) over a single FM fre-
quency. For example, a HD Radio
TM FM
station can run a main channel of music
and a sub channel of news(or even two dif-
ferent music channels) at one frequency.
But only the program content of the main
channel is broadcasted in analog.
HD Radio TM signal delay
To overcome the delay that digital sys-
tems inherently produce, HD Radio
TM
technology first uses the audio signal of
the analog broadcasting when you tune
to an AM station or to the main channel
of a FM station. After that, the system will
blend from analog to digital signal.
Normally, this blending is very smooth. If
you experience a skip in program content
of several seconds, the radio station has
not implemented HD Radio
TM broadcast-
ing correctly. This is not a problem with
your audio system.
Due to the fact that sub channels are only
broadcasting digital, blending from analog
to digital signal is not possible if you tune
to a sub channel. In this case playback of
the sub channel starts after several sec-
onds, this is a normal function.