[Gllug] Copy-protected CD's

tet at accucard.com tet at accucard.com
Wed Apr 10 12:48:31 UTC 2002

>Maybe I am thick - but I cannot see how you can stop a CD being played on a
>CD drive, if it will also play on a bog-standard domestic CD player.
>Surely whatever magic code is on the CD, and ignored by the domestic CD
>player, can be ignored also by the CD-rom drive ?

As I understand it, they CDs are pressed with deliberate CRC errors
encoded into them. CD-ROM drives tend to enforce the error correction
more strictly (in hardware, I believe), and refuse to read what seems
to be a corrupt track, where audio CD players tend to skip the track
in question (which the record companies are claiming isn't audible to
the human ear).


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