Eccentricity detection and compensation of a disk by a preformat
Edge detection of information pit pattern by establishing thresh
Enclosure for optical disk or the like
Erasable digital video disk with reference clock track
Erasable optical data storage medium
Erasable optical data storage medium having a zoned integral rec
Erasable optical data storage medium having an embedded servo tr
Erasable optical disk and optical information recording/reproduc
Erasable optical recording medium with a reversible light absorp
Erasable recording media