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HD Radio® is a technology that enables to send
digital broadcasting as well as analog one using
existing frequencies for FM or AM broadcasting.
Quality of broadcast is improved to the level of
music CD in digital FM and that of analog FM in
digital AM.
Moreover, if receiving condition is good, you can
listen to programs in stereo with the digital AM
broadcast.
Digital FM of Supplemental Audio Services can
send up to 7 channels of the Supplemental
Program Audio other than the Main Program
Audio.
• Main Program Audio (hereafter called Main channel)
• Supplemental Program Audio (hereafter called Sub
channel)
Analog AM
Digital AMAnalog AM
Digital AM
(HD AM band)
(HD FM band)
Analog FM
Digital FMAnalog FM
Digital FM-1chAnalog FM
Digital FM-2ch
Digital FM-8ch
Digital FM
Main Program Audio
(Main channel)
Supplemental Program Audio
(Sub channel)
…
Digital broadcasting can send other information
than audio, so you can display data such as title
of music.
What is the HD Radio®?