[filmscanners] RE: IV ED dynamic range... DYNAMIC RANGE!

["Laurie Solomon" <laurie@advancenet.net>]

In the words of Ronald McDonald Raygun: Here we go again!

The whole damn thing turns on the phrase, "acceptable signal level."
Austin, if I read him correctly, holds that "acceptibility" is defined as
being above the noise level at the low end; Julian probably implicitly
accepts this also.  However, he as not explitly stated as such and has not
defined acceptibility in term of noise but presupposes it as a give in the
notion "minimium acceptible signal."  Thus, if you substitute minimum signal
for minimum acceptible signal in the equation, you would need to duivide by
noise to get the minimum acceptible signal.

Hope that clears up the apparent but not real disagreement and we can
prevent a rerun of the last debate.

> -----Original Message-----
> From: filmscanners_owner@halftone.co.uk
> [mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Todd Flashner
> Sent: Thursday, August 08, 2002 3:23 PM
> To: laurie@advancenet.net
> Subject: [filmscanners] Re: IV ED dynamic range... DYNAMIC RANGE!
>
>
> on 8/8/02 10:02 AM, David J. Littleboy wrote:
>
> > Ouch. Sigh. Dynamic range:
> > 1. The difference, in decibels, between the overload level
> and the minimum
> > acceptable signal level in a system or transducer.
> > <snip>
> > 5. The difference between the maximum acceptable signal
> level and the
> > minimum acceptable signal level.
> > (Modern Dictionary of Electronics, 6th ed.)
> >
> > Austin is, of course, right on this one.
>
> I don't claim to know DyR better than anyone else but I have
> followed the
> discussion for some time. So, I'm not sure why what you cite
> above supports
> Austin any better than Julian.
>
> My reading of Julian is that he is in full
> agreement/compliance with what is
> written above. I believe he feels DyR is exactly: 5. The
> difference between
> the maximum acceptable signal level and the
> minimum acceptable signal level.
> (Modern Dictionary of Electronics, 6th ed.)
>
> My reading of Austin is that he believes DyR is the The
> difference between
> the maximum acceptable signal level and the
> minimum acceptable signal level, divided by noise, (where noise is
> typically/frequently specified as 10.
>
> Austin, Julian, please correct me where I'm wrong!
>
> > Comment: this went back and forth interminably, and I think
> most of that
> > could have been avoided by actually quoting standard
> definitions of the term
> > and working from there.
>
> Just curious, would those standard definitions and terms BE
> what you quote
> above? If so, lets see if it makes a difference. I doubt it will...
>
> Todd Flashner
>
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