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Article #16579Video Signals
From: marc.a.levy
Date: Thu, 07 Jan 1993 16:21
Date: Thu, 07 Jan 1993 16:21
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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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arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsk!cbnewsj!att-out!cbfsb!cbnewsg.cb.att.com!mxlShow Full Headers
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsk!cbnewsj!att-out!cbfsb!cbnewsg.cb.att.com!mxl From: mxl@cbnewsg.cb.att.com (marc.a.levy) Subject: Video Signals Message-ID: <1993Jan7.162136.19752@cbfsb.cb.att.com> Sender: news@cbfsb.cb.att.com Organization: AT&T Date: Thu, 7 Jan 1993 16:21:36 GMT Lines: 31