By way of analogy: Your argument is that a dump of a bit-rotted graphics ROM IC from an arcade board is just as good as a non-bit-rotted dump, if the affected bits don't visibly affect the graphics shown in-game. I won't sugar-coat it, that's not preservation, that's half-assing.
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In that case I most likely didn't explain the theory behind the proposal well enough. On the vast majority of LD players, you're 100% correct - it absolutely isn't worth going through the effort of sampling off the pickup versus the output of the player itself. I agree.
However, I have heard rumors - unverified, but from people I'm inclined to believe - of players where the pickup *additionally* has a signal for whether or not it was successful in grabbing a given sample.
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The reason why this would be important for coming up with a theoretically perfect dump is that many discs these days have minor dropouts that would be quite difficult indeed to correct manually by merging together captures of multiple different examples of the same disc.
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In principle, knowing whether a single sample of the analog data was "good" or not would enable a sufficiently dedicated person to construct a capture with *zero* horizontal streaking or other artifacting due progressive rot.
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Uusi keskustelu -
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I repeat, since it's analog, there aren't any "correct" samples, any more than you can have a "correct" sample from a vinyl record. The additional signal from a pickup tells you how good the focus is, and is used for closed-loop servo of the optics.
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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