On Sep 25, 2012, at 5:44 PM, John Moore wrote:
> Okay today's fun was a 25 minute conference call on what was deemed
QC issues in file based delivery. I was told my Red was too hot and
some of my video went down to or below 0IRE. Well I made screen grabs
of all the time codes and found nothing wrong according to my Tek wfm
7020 set to tekronix default alarms. I sent those to the network and
just spent 25 minutes to confirm that things are really at 7,5 IRE and
the Red is legal according to the Arrowhead and split diamond
display. It was a nice conversation if which I was told that they
were under the assumption that the "Arrowhead" display was not for
SD. WTF? The arrowhead existed before we had HD to deal with. At
any rate if anyone is interested I uploaded a file to the file section
named QC Issues in SD Video. I would welcome any enlightenment as to
what is illegal in the signal. Even the specular errors aren't enough
to trigger the alarm. > Just because the Red vector goes past the box
it's nowhere near illegal on the arrowhead display.
I agree:
Long ago, I'd found that many so-called QC 'engineers' think that the
vectorscope color bar boxes indicate maximum color saturation. They
are not the limit. The boxes indicate the correct amount of
saturation for 75 percent saturated color bars. But it seems that
many think saturated colors should not exceed their corresponding
vector box. I don't know how many times I've had to correct their
thinking.
Dennis Degan, Video Editor-Consultant-Knowledge Bank
NBC Today Show, New York
[Non-text portions of this message have been removed]
No comments:
Post a Comment