#DPS PAR
>> What's in a line? << Is that anything like "what's in a name?, by
any other name…" <g>
Well Greg, I couldn't get an answer about horizontal resolution on D1
from Quantel or Textronix because they said Digital was different
than Analog. There are no specs for Horizontal resolution for
Digital. "Why not" I asked, "because resolution was calculated as an
analog value long before digital and was not based on the number of
pixels which could be counted, as monitors where different; they were
just a phosphorous tube upon which an electron gun was scanned." So
resolution was determined by electron scan lines and was calculated
only for a monochrome value, which is how resolution is still
calculated today.
Then as time goes on, monitors get color and are no longer scan lines
on a phospor tube but divided into pixels with three elements red
green and blue created with a mask. But resolution is still being
calculated the same way ie:as a monochrome analog signal. There
really is no direct relationship any more because the scans are no
longer continuous and you have guns or a gun firing at individual
pixels. The term when applied to the analog output of a VTR is
produced through the use of an oscilloscope. Which is doable because
an oscilloscope is a monochrome device and has a continuous analog
sweep. But this says nothing about output to a Monitor, where
resolution becomes dependent on the quality of the monitor. A
Broadcast monitor can go upward of 440 with home TV's somewhere
around 240. So whats the resolution difference between D1 to Beta SP?
Same problem. Apples and Oranges. And in a dub from D1 to Beta SP,
the Beta SP copy becomes the determining factor.
Your math looks good to me! <g> and your reasoning sound. Only problem
is I can't find any information to substantiate your conclusion. Got
any ideas? This is still somewhat irrelevant for the reasons I stated
previously, as the most important factor is S/N ratio and crosstalk,
but interesting! <G>