[opendtv] Re: New Thread: What becomes of Legacy Analog Equipment
- From: "Allen Le Roy Limberg" <allimberg@xxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 28 Nov 2007 09:15:20 -0500
I had a Samsung prototype 8VSB receiver in our Washington, DC M Street
patent law office in 2000. As long as someone did not walk behind the coat
hanger antenna reception was fine from the PBS station in Shirleyville. The
signal was not received line-of-sight, but as principal echo from the
building across a small park. I invited Craig Tanner and Lynn Claudy over
to see it at the time that almost everyone was gloomy about the prospects of
OTA 8VSB ever being receivable in DC.
The current off-the-shelf equipment is superior to that original prototype
receiver, which I believe was the first to use digital synchrodyne
demodulation.
Al
----- Original Message -----
From: "Tom Barry" <trbarry@xxxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Tuesday, November 27, 2007 9:38 PM
Subject: [opendtv] Re: New Thread: What becomes of Legacy Analog Equipment
> Are we now assuming ATSC STB's or TV's will work indoors in urban
> canyons? I didn't know that was really proven yet with off the shelf
> equipment.
>
> - Tom
>
>
> Craig Birkmaier wrote:
> > At 10:58 AM -0500 11/27/07, Manfredi, Albert E wrote:
> >
> >> John Shutt wrote:
> >>
> >>> And Bert's insistence to the contrary, I know very well we
> >>> could have done better.
> >>
> >>
> >> Some people are just inconsolable.
> >>
> >> The facts are, one by one all the oft-repeated objections to 8-VSB have
> >> dropped by the wayside, as was predictable from fairly early on. The
> >> dreaded cliff effect remains, of course, which affects all modulation
> >> schemes. It would be great to do another comparison test now, but since
> >> no one would benefit from it, it won't happen. Alas.
> >
> >
> > And some people are just blinded with optimism.
> >
> > All you are able to relate is that the ATSC system has become usable by
> > a handful of laggards who are unwilling or unable to pay a monthly
> > subscriber fee for their TV fix.
> >
> > For now the ATSC system will work as advertised for a the very small
> > percentage of the population that uses an antenna. Will this continue to
> > be true in a few years?
> >
> > What will happen to the image quality of programming if and when
> > broadcasters decide that they want to reach portable and mobile
> > receivers? New services will need to steal bits from existing services
> > - bits that will need even more bits to get delivered reliably using a
> > standard that is still being developed. In other words, ALL legacy
> > receivers WILL NOT be able to use these new services, but the quality of
> > the existing services is likely to be compromised.
> >
> > There are SO MANY ways we could have done better:
> >
> > - A modulation system that has the flexibility to be optimized for
> > different services on the fly, WITHOUT a hefty bit penalty for the more
> > demanding MPH modes.
> >
> > - A spectrum allocation system that would have forced the broadcasters
> > to use SFNs to provide BETTER coverage of their markets WITHOUT
> > radiating into adjacent markets, with the net result of improved
> > spectral efficiency that would allow EVERY market to have at least twice
> > as many channels.
> >
> > - A political/regulatory environment that would have removed the
> > anti-competitive perks that broadcasters are using to avoid competition
> > with multi-channel systems.
> >
> > - A well defined platform that supports news services and the ability to
> > extend the capabilities of the system using software defined
> > functionality as is the case with web browsers.
> >
> > We are all glad for you Bert. The ATSC has succeeded in its quest to
> > replicate the NTSC service. Hope you are enjoying the better pictures
> > and sound, and the same lame, old, dying programming.
> >
> > Regards
> > Craig
> >
> >
> > ----------------------------------------------------------------------
> > You can UNSUBSCRIBE from the OpenDTV list in two ways:
> >
> > - Using the UNSUBSCRIBE command in your user configuration settings at
> > FreeLists.org
> > - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
> > unsubscribe in the subject line.
> >
> >
>
> --
> Tom Barry trbarry@xxxxxxxxxxx
>
>
>
> ----------------------------------------------------------------------
> You can UNSUBSCRIBE from the OpenDTV list in two ways:
>
> - Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
>
> - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
>
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
Other related posts:
