wrote:
Hein ten Horn wrote:
wrote

DRM has a hybrid digital/analog mode. See this manual,
page 20. Notice how the DRM sits "in-band on-channel"
same as the HD Radio works.
www.drm.org/pdfs/Broadcast_Manual.pdf

No, the manual does not state
"DRM has a hybrid digital/analog mode".
A simulcast is not necessarily hybrid.

By that reasoning, HD Radio is not a hybrid format, because the
digital information sits *next to* the AM signal.

[a copy]
By that reasoning, HD Radio is not a hybrid format, (..)

False.

[copy]
(..) HD Radio is not a hybrid format, because the
digital information sits *next to* the AM signal.

False.

HD Radio is a simulcast format.

True, on the understanding that both programme contents are the same.

[quote]
DRM supports a number of different simulcast options. Currently the
supported simulcast modes require the use of additional spectrum outside
an assigned 9 or 10 kHz channel (Multi-Channel or Multi-frequency
Simulcast, MCS). The DRM signal can be located in the next adjacent
upper or lower channel and can occupy a half or whole channel
depending on the bandwidth option chosen.
[unquote]
So far nothing about IBOC.

Okay. By that reasoning, because HD Radio sits "next to" the AM
signal, then it is not IBOC either. It is a simulcast format.

Do you agree with that statement?

As a whole? No.

gr, Hein