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Article #16579

Video Signals

#16579
From: marc.a.levy
Date: Thu, 07 Jan 1993 16:21
30 lines
1484 bytes
Hi,

I have a question that someone out there may know the
answer to...

What effect would inverting the color burst do? (180 out of
phase)??  Would the colors be "Backward"?? making a light 
brown color a green color?? (Like with inverse video)?

I (Like some others I have spoken to) use the Universal
Descrambler on a non-scrambled channel, and get good, accurate
color, but when a scrambled chanell is tuned in, the collors
are incorrect (Faces look green).  I have noticed that when
the vertical lock is NOT correct, the color's sometimes are
correct.  I have also noticed that if the polarity of the
video is reversed (Neg/pos) even though the images are
reversed, the color is correct.

My idea was to put the color burst 180 out of phase (This can
be done with the spare NAND and spare 4053 (to make it
selectable)) but before I try, I wanted to know if anyone out
there had any better ideas? or for some reason thinks I am not
on the right track.

Marc.

P.S. I am talking about the Radio Electronics May 1990
"Universal Descrambler".

  
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From: mxl@cbnewsg.cb.att.com (marc.a.levy)
Subject: Video Signals
Message-ID: <1993Jan7.162136.19752@cbfsb.cb.att.com>
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Organization: AT&T
Date: Thu, 7 Jan 1993 16:21:36 GMT
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