unscramble not standard IVs scrambled DVDs thru bruteforce, intended for Gamecube/WII Optical Disks.
https://web.archive.org/web/20081221213353/http://www.ingenieria-inversa.cl/?lp_lang_pref=en
And DVD raw sectors (2064, 2236, 2304, 2384, 2816 bytes) also can be unscrambled.