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When watching black and white old TV shows on DVD, if finely detailed black and white herringbone or checkerboard patterns occur (say in a character's jacket or dress), a most peculiar artifact occurs. The pattern suffers from a wavy purple and yellow oscillation effect over the material that has the pattern in it. (My teenage son laughs at this, calling it our TV's LSD experience.) :-)
The TV is a Pioneer 60" plasma 6010FD; the player is an Oppo BDP-83. It has done this for years, but I finally decided to ask: 1.) what is this called? 2.) why does this occur? 3.) what can be done to eliminate it?
Please pardon my ignorance of what effect is happening here. TIA for any assistance offered.
Follow Ups:
is what I thought. Certain clothing items or necktie patterns were discouraged from being worn on TV broadcasts.
Usually this only affects video fed through the Composite connection. It could also be a bit of dot crawl thrown in for good measure. There are filters which can reduce the intensity of this problem, but elimination is almost impossible. If some of these old TV shows were taken from a Composite source (not every studio does a 4k scan of their productions), it's pretty much "baked-in" to the video.
I believe it has to do with refresh rates mixing with certain patterns. It happens with every TV I've ever owned. Someone with more technical knowledge can explain it better than I. I don't think there is anyway to eliminate it.
Jack
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