198023 ⎘
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor; Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track Dimensions of grooves or tracks, e.g. groove depth, track pitch
Optical disk recording method, optical disk device, and integrated circuit
#2Optical disk recording method, optical disk device, and integrated circuit
#3Method of protection of optical media, such as CDs and DVDs against unauthorised copying and a non-standard optical audio disc and video disc with protection against loading and playing in personal computers and matrices for making thereof
#4Optical disc having a plurality of recording layers
#5Optical medium reproducing device and optical medium reproducing method
#6Optical disc having a plurality of recording layers
#7Optical information medium having multiple layers with management information areas disposed at the same distance from center
#8Anti-piracy feature for optical discs
#9Optical disc information device and information processing device
#10Optical disk information device and information processing device