Steve wrote:
In that case I think they'd better forget about DRM. A smarter move
would be for broadcasters to move to single sideband operations. This
might not give them a larger audience, but it would sure allow them to
cut a lot of their expenses. All they'd really need is a stock ham
transceiver and a dipole. And I'll bet that at this moment there are
more small receivers capable of receiving SSB than DRM.

Even better would be double-sideband-reduce-carrier. It's easy to generate
with DSP and sort of in between SSB and AM. It's basicly USB and LSB at the
same time. Twice the cost of SSB in terms of power and bandwidth, but far less
in power than AM.

It has the advantage that a standard AM receiver has no trouble with it.

The Sony IFC-2010 (ICF-2001D) was born because Sony had a warehouse of AM
stereo decoder chips and no market for them.

At this point it would not cost a lot of money to make a dedicated DSP
chip that would decode AM, DSBRC, and SSB at an IF of 445kHz. Possibly
a brodcasters or radio manufacturer's association could get together and
bankroll it.

Geoff.


--
Geoffrey S. Mendelson N3OWJ/4X1GM
To help restaurants, as part of the "stimulus package", everyone must order
dessert. As part of the socialized health plan, you are forbidden to eat it. :-)

On Oct 30, 4:44*pm, "Geoffrey S. Mendelson"
wrote:
Steve wrote:
In that case I think they'd better forget about DRM. A smarter move
would be for broadcasters to move to single sideband operations. This
might not give them a larger audience, but it would sure allow them to
cut a lot of their expenses. All they'd really need is a stock ham
transceiver and a dipole. And I'll bet that at this moment there are
more small receivers capable of receiving SSB than DRM.

Even better would be double-sideband-reduce-carrier. It's easy to generate
with DSP and sort of in between SSB and AM. It's basicly USB and LSB at the
same time. Twice the cost of SSB in terms of power and bandwidth, but far less
in power than AM.

It has the advantage that a standard AM receiver has no trouble with it.

The Sony IFC-2010 (ICF-2001D) was born because Sony had a warehouse of AM
stereo decoder chips and no market for them.

At this point it would not cost a lot of money to make a dedicated DSP
chip that would decode AM, DSBRC, and SSB at an IF of 445kHz. Possibly
a brodcasters or radio manufacturer's association could get together and
bankroll it.

Geoff.

--
Geoffrey S. Mendelson N3OWJ/4X1GM
To help restaurants, as part of the "stimulus package", everyone must order
dessert. As part of the socialized health plan, you are forbidden to eat it. :-)

Indeed. Yes, I think an approach like this would make much more sense
for broadcasters given the business realities they currently face.

On Oct 30, 1:44*pm, "Geoffrey S. Mendelson"
wrote:
- - Steve wrote:
- - In that case I think they'd better forget about DRM. A smarter
move
- - would be for broadcasters to move to single sideband operations.
This
- - might not give them a larger audience, but it would sure allow
them to
- - cut a lot of their expenses. All they'd really need is a stock ham
- - transceiver and a dipole. And I'll bet that at this moment there
are
- - more small receivers capable of receiving SSB than DRM.

- Even better would be double-sideband-reduce-carrier.
http://groups.google.com/group/rec.r...60d4ae9e1f1be4

The Better "Idea" Gets Better !

DSB and Suppress {Reduced} Carrier has many of the
Advantages of SSB : Plus the better Sound Quality of
AM Radio.

- It's easy to generate with DSP and sort of in between
- SSB and AM.

YES - PLus any current AM Radio or SSB Receiver can
also receive DSB Transmissions. Backward compatible
with AM Radios and SSB Receivers.

- It's basicly USB and LSB at the same time.

YES - WWV/WWVH uses DSB while CHU uses USB.

- Twice the cost of SSB in terms of power and bandwidth,
- but far less in power than AM.

Redirect the Wasted AM Power to the Side-Bands

100KW AM = 50KW Carrier + 25KW LSB + 25 KW USB

100KW DSB = + 40 KW LSB + 40 KW USB & 20 KW SRAMC*
* Suppressed {Reduced} AM Carrier
-result- Same Total Power Level :
But More Power To The Content :
And A More Powerful Audio Stream.

- It has the advantage that a standard AM receiver
- has no trouble with it.

Yes Yes Yes - Backward compatible with AM Radios
and SSB Receivers.

Plus DSB has the better Sound Quality of AM Radio
and even the potential of Stereo or at least 'enhanced'
Mono.

- The Sony IFC-2010 (ICF-2001D) was born because
- Sony had a warehouse of AM stereo decoder chips
- and no market for them.

Yes that brings up the 2nd Point the AM Stereo Decoder
Chip Designs can be used to Detect and Receive DSB
and Use it as with an AM-SYNC Function; and even the
potential of Stereo or at least 'enhanced' Mono.

- At this point it would not cost a lot of money to make
- a dedicated DSP chip that would decode AM, DSBRC,
- and SSB at an IF of 445kHz.

As you have point-out SONY already has the design.
Plus Drake/Eton/Grundig also has the Designs; along
with several others...

It's just a matter of starting-up production and producing
a Million Chips a Month for a Year and Warehousing them
and then Distributing them as they sell to meet the need...

- a brodcasters or radio manufacturer's association could
- get together and bankroll it.

Better a Consortium of Governments could simply
Mandate DSB Braodcasting and Create-The-Need :
Then the Capital would Flow to It Naturally.

OBTW-IMHO : Versus IBOC for the AM/MW Radio Band
DSB is the Better Idea !

-cause- Once you have the DSB Chips in the 'portable'
AM/FM Shortwave Radios* : Using DSB in AM/MW
Radio function is a No Cost No Brainer !
* +90% of the Sales of all Shortwave Radio World Wide.

Geoff.
- --
- Geoffrey S. Mendelson N3OWJ/4X1GM
- To help restaurants, as part of the "stimulus package", everyone
must order
- dessert. As part of the socialized health plan, you are forbidden to
eat it. :-)

the better idea gets better ~ RHF

On Oct 30, 3:25*pm, RHF wrote:
On Oct 30, 1:44*pm, "Geoffrey S. Mendelson"
wrote:- - Steve wrote:

- - In that case I think they'd better forget about DRM. A smarter
move
- - would be for broadcasters to move to single sideband operations.
This
- - might not give them a larger audience, but it would sure allow
them to
- - cut a lot of their expenses. All they'd really need is a stock ham
- - transceiver and a dipole. And I'll bet that at this moment there
are
- - more small receivers capable of receiving SSB than DRM.

- Even better would be double-sideband-reduce-carrier.http://groups.google.com/group/rec.r...60d4ae9e1f1be4

The Better "Idea" Gets Better !

DSB and Suppress {Reduced} Carrier has many of the
Advantages of SSB : Plus the better Sound Quality of
AM Radio.

- It's easy to generate with DSP and sort of in between
- SSB and AM.

YES - PLus any current AM Radio or SSB Receiver can
also receive DSB Transmissions. Backward compatible
with AM Radios and SSB Receivers.

- It's basicly USB and LSB at the same time.

- YES - WWV/WWVH uses DSB while CHU uses USB.

WWV/WWVH uses DSB* on 2.5 MHz; 5&10&15&20 MHz
http://www.nist.gov/pml/div688/grp40/wwv.cfm
http://en.wikipedia.org/wiki/WWV_%28...oadcast_format
* Double Side-Band Amplitude Modulation [DSB-AM]
Most times the AM-SYNC function on my GS800-M
Radio enhances the WWV Signal's Audio and does
improve it's Listenability.

CHU uses USB* on 3330 kHz; 7850 kHz & 14670 kHz
http://en.wikipedia.org/wiki/CHU_%28radio_station%29
* Upper-Side-Band [USB] The CHU Time Signal is AM;
with the LSB suppressed (Transmission Type H3E)

~ RHF

WWV "The Tick !" : All 'The Time' : All The Time !
? A Clear Channel Station ?
http://groups.google.com/group/rec.r...e125277ed24955

On 10/30/2010 1:44 PM, Geoffrey S. Mendelson wrote:

...
At this point it would not cost a lot of money to make a dedicated DSP
chip that would decode AM, DSBRC, and SSB at an IF of 445kHz. Possibly
a brodcasters or radio manufacturer's association could get together and
bankroll it.

Geoff.



Might just be better to a "dual system." AM would have to go, but you
could run, say, USB analog and use the LSB for a digital carrier ...
people would yell, scream, pull their hair out, etc. ... but we did go
all digital TV and just ram it down the oppose'rs throats ... just look
at the tons of old analog TV's sitting around that you can't even get a
digital box to slap on now ... never say never, to anything ...

Regards,
JS