I'm no longer hearing the IBOC sidebands as I tune past WBBM and WSCR. Have
other CBS/Infinity stations also turned off the IBOC noise?

WIND has dropped IBOC. Aside from the Clear Channel stations, it doesn't
seem like there's much commitment to IBOC-AM, at least in Chicago.

Frank Dresser

I'll check KCBS in the AM, but it has been my experience that that IBOC
isn't always turned on. It's not like anyone is using the service. ;-)



Frank Dresser wrote:
I'm no longer hearing the IBOC sidebands as I tune past WBBM and WSCR. Have
other CBS/Infinity stations also turned off the IBOC noise?

WIND has dropped IBOC. Aside from the Clear Channel stations, it doesn't
seem like there's much commitment to IBOC-AM, at least in Chicago.

Frank Dresser

wrote in message
oups.com...
I'll check KCBS in the AM, but it has been my experience that that IBOC
isn't always turned on. It's not like anyone is using the service. ;-)


Yeah, that's been my expirence, so I didn't think much when I didn't hear
the noise. IBOC started intermittently on the two CBS stations here, but
had run continously during the daytime for maybe a couple of months. I
don't think I've heard the sidbands on either station for about 3 weeks.

Clear Channel's AM stations in Chicago continue to use IBOC.

Some, not many but some, people should be using the service. There were a
few rather expensive IBOC receivers introduced this year. IBOC was supposed
to be building momentum now.

It seems curious that a couple of big time clears have turned off the IBOC
sidebands during the Christmas season.

Frank Dresser

KCBS IBOC alive and well today.

Incidentally, IBOC leads to lower conventional AM quality on the IBOC
station itself since they have to narrow the bandwidth of the analog
signal.

Frank Dresser wrote:
wrote in message
oups.com...
I'll check KCBS in the AM, but it has been my experience that that IBOC
isn't always turned on. It's not like anyone is using the service. ;-)


Yeah, that's been my expirence, so I didn't think much when I didn't hear
the noise. IBOC started intermittently on the two CBS stations here, but
had run continously during the daytime for maybe a couple of months. I
don't think I've heard the sidbands on either station for about 3 weeks.

Clear Channel's AM stations in Chicago continue to use IBOC.

Some, not many but some, people should be using the service. There were a
few rather expensive IBOC receivers introduced this year. IBOC was supposed
to be building momentum now.

It seems curious that a couple of big time clears have turned off the IBOC
sidebands during the Christmas season.

Frank Dresser

It looks like WWJ here in Detroit is still running it. They also
started some ads pushing the format so I don't think it is going over
very well. All news in HD....gotta have it!

Jim


On Thu, 29 Dec 2005 05:48:19 GMT, "Frank Dresser"
wrote:

I'm no longer hearing the IBOC sidebands as I tune past WBBM and WSCR. Have
other CBS/Infinity stations also turned off the IBOC noise?

WIND has dropped IBOC. Aside from the Clear Channel stations, it doesn't
seem like there's much commitment to IBOC-AM, at least in Chicago.

Frank Dresser

For One and All,

On FM KDFC in the SF Bay Area was running IBOC
http://www.kdfc.com/new/home_flash.cfm
http://www.ibiquity.com/press/pr/061903.htm
- Owned by Bonneville International Corp.

KDFC is proud to be the first station in the world broadcasting in (HD)
digital radio, with twice the fidelity of satellite radio.
- by Paul Black, KDFC Engineering Department
http://www.kdfc.com/new/hd.cfm
The HD Radio signal is called an "In Band, On Channel" (IBOC) signal.

To me IBOC makes Sound Sense and Good Business Cents
for FM Stereo Radio - But for AM Talk Radio ? ? ? ? ? ? ? ?

Long, winding road ahead for digital radio
More stations are broadcasting it,
but few listeners own receivers that can get better signal
- by Benny Evangelista
- Chronicle Staff Writer
- May 31, 2004
http://sfgate.com/cgi-bin/article.cg...type=printable
NOTE - IBiquity has the upper hand in getting stations to convert
because its investors include the biggest radio corporations, including
: Clear Channel Communications, Bonneville International Corp.,
Susquehanna Radio Corp., Viacom Inc. and ABC Inc.

IBOC Radio Station "On-the-Air"
http://ibiquity.com/hdradio/hdradio_hdstations.htm


just my two cents worth ~ RHF

R.F. Collins wrote in message
...
It looks like WWJ here in Detroit is still running it. They also
started some ads pushing the format so I don't think it is going over
very well. All news in HD....gotta have it!

Jim


IBOC is again on at WSCR-670. It's still off at WBBM-780.

Both stations are talkers. WSCR is sport talk and WBBM is all news.

Frank Dresser

On Thu, 29 Dec 2005 15:15:13 GMT, "Frank Dresser"
wrote:


R.F. Collins wrote in message
.. .
It looks like WWJ here in Detroit is still running it. They also
started some ads pushing the format so I don't think it is going over
very well. All news in HD....gotta have it!

Jim


IBOC is again on at WSCR-670. It's still off at WBBM-780.

Both stations are talkers. WSCR is sport talk and WBBM is all news.

Frank Dresser


Don't they have to bandwidth-limit the analog when the HD's on?

Greetings Frank and all!
Pardon me for my ignorance but what is IBOC? I will never know without
asking. I appreciate in advance the response! Have a great week and a
wonderful New Year! Jon in South Carolina.

May I chime in from the broadcasters perspective? Most of what's been
written is very accurate. The IBOC technology as implemented in the
USA was developed by Ibiquity, Inc and is licensed under the name 'HD
Radio'. Hence, if you're interested in purchasing a receiver to decode
this technology, do a search for 'HD Radio'. To date, there are very
few receivers available, largely due to standards resolution, and the
long lead-time required by Detroit to implement new technologies into
US made automobiles.

My sense is that radio Broadcasters, feeling the heat of competition
from XM / Sirius / Ipods / Internet streams + WiFi, as well as the
Eureka 147 digital radio roll-out in Europe (whereby all radio services
emanate from a single point-source, and all have the same technical
capabilities) felt the need to "do something digital". It had to be on
the traditional AM/FM band because Broadcasters have paid a ton of
money for each of their properties; to simply abandon the AM/FM scheme
in order to implement 'digital' would have been financially devastating
to station owners.

As has been discussed, HD Radio is not currently authorized on AM
stations at night, ("night is *not* defined as 6 AM to 6 PM, but rather
varies with a station's geographic location and the time of year)
though a serious lobbying effort is on to change this. Hence, at this
point it does not seriously impact DX opportunities, since most
long-range reception is a nighttime phenomenon (when the IBOC signals
are off).

Here in Los Angeles, we've implemented HD Radio on AM 1110, Radio
Disney - a children's formatted music station. I would describe the
aural result as "startling" - 14 kHz stereo, very low noise, no
obviously noticable artifacts, no multi-path in an automotive
environment - in short, it's *very* hard to believe you're hearing an
AM station.

Compare this to a *typical* AM receiver (not necessarily a Drake R8B or
Eton E1/XM) with a mono 3.5 kHz response and loud buzzes evey time you
drive under a power line, and you can see the attractivness to the
Broadcasting community. "Here, finally is a way to compete with new
technologies" [programming issues aside!].

On the FM side, the aural improvement is much less noticeable. Since
no pre-emphasis is required in the IBOC signal path, the high-end
sounds more 'natural' and 'airy', but these are very subjective terms.
What is new is the ability to "split" the IBOC bandwidth, such that
station W*** - FM can now have 2 or 3 full fidelity "sister" or
"associated" stations. This will provide FM broadcasters with the
opportunity to explore new (and hopefully more creative) programming
opportunities.

Here in LA, about a half-dozen FM broadcasters have already implemented
this "multiple channel" broadcasting, and most of these new channels
are (for the time being) commercial free.

Too, there is a lot of talk about implementing 'surround' sound on IBOC
FM, which also might prove to be a 'startling' addition to our radio
experiences.

Again, my sense is that broadcasters are thinking that the analog
technology that served us well in the 20th Century has run its course,
and that to remain a viable medium a transition to digital *must* take
place. The trouble is that there are (probably) a half-billion analog
receivers in the USA alone capable of receiving analog AM / FM, and
these can't be abandoned overnight. The Station's around the country
are now in the first phase of implementing digital radio, in the form
of IBOC / HD Radio. And my bet is that it's *not* going to go away.

Mike Worrall
ABC Radio
Los Angeles