Old programs can be up converted to true HD if the program was shot on 35mm film and the film is still available. 35mm film contains more resolution than HD video. The up conversion is actually the film being down converted to HD. I Love Lucy was shot directly on 35mm film. It was not a live broadcast saved on a kinescope. So, I Love Lucy could be shown today in HD by converting the film to HD video.
Kent McVety
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