"IBOC proposal is unecessary"

"The current IBOC plan is an UNECESSARY expansion of existing SCA
services. There is sufficient bandwidth in the existing SCA channels
using proven robust existing technology to carry all the services that
the IBOC proponents requests service for: 1) Full Digital MPEG1 or MP3
streaming Digital Audio Stereo broadcasting 2) Value-Added text/
graphic printouts on the face plate of the reciever such as banner ads
for advertised products, name of song/artist, emergency road and
traffic alerts etc and emergency radio activation."

http://members.tripod.com/rad4rest-o...UNECESSARY.htm

"Analog FM Radio Subcarriers (SCAs)"

"A subcarrier, known also as Subsidiary Communications Authority or
SCA, is a separate audio or data channel which is transmitted along
with the main audio signal over a broadcast station. These subcarrier
channels are not receivable with a regular radio; special receivers
are required. Subcarriers are used for many different purposes,
including (but not limited to) paging, inventory distribution, bus
dispatching, stock market reports, traffic control signal switching,
point-to-point or multipoint messages, foreign language programming,
radio reading services, radio broadcast data systems (RBDS), station
control and meter reading, utility load management, and muzak. A
broadcast station may transmit more than one subcarrier signal."

http://www.fcc.gov/mb/audio/subcarriers

"Today’s HD Radio technology features include"

The ability to broadcast multiple program streams over a single FM
frequency. A variety of data services, including text-based
information – artist name, song title, weather alerts, school
closings, etc. scrolled across your receiver display... Real-time
traffic reports broadcast by local stations and visually displayed on
a vehicle’s navigation system."

http://ibiquity.com/hd_radio

SCAM!!!