CD data recovery?

[Henry Spencer]

On Mon, 20 Sep 2004, Lennart Sorensen wrote:
> I wonder if someone could scan the cd surface at very high resolution
> (maybe with a laser beam) and then take the scans of each piece and lign
> up the tracks that way and create a virtual cd image and recover the
> data from that.  Hmmm.  Does sound expensive.

Feasible in principle, I expect, but you'd need to work at exceedingly
high resolution, and it would get pricey... 

(There are people already experimenting with scanning traditional 
needle-and-groove LPs and recovering the sound, and apparently that can
be done, although at present the audio quality is too poor for it to be
a useful technique.  But CDs are a whole different order of magnitude.)

                                                          Henry Spencer
                                                       henry-lqW1N6Cllo0sV2N9l4h3zg at public.gmane.org

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