Quote:
Originally Posted by pgnl
...I think the Japanese invented a way of eliminating ghosting on broadcast TV, but it never reached the UK.
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Philips was the major innovator in analog ghost canceling:
https://www.edn.com/edn-12-21-95-phi...ion-technolog/
Unfortunately, it was incapable of 100% cancellation in many situations, and it was decided that it wasn't worth it unless it was very nearly perfect. Customers would not take well to buying a "ghost cancelling" set and still seeing ghosts. "Ghost reducing" was not salable.
In analog, if a ghost causes a very deep notch in the frequency response, you can't restore that totally missing information. You would only introduce random noise.
In digital, because of the redundant forward error correction (FEC) bits that are scattered about the spectrum and bit stream, some amount of data can be totally lost and the signal can still be reconstructed. Hence the digital "cliff effect" of either a perfect picture or no picture. In analog, the improvement was by degrees, rather than working/not working.