Eiji Kumagai

Optical disc device and optical disc discriminating method

Disk recording medium and disk drive apparatus

Disc reproduction apparatus

Optical disc reproduction method and optical disc reproduction apparatus

Disc drive apparatus and method for generating wobble information

Electric power supplying apparatus, electric power supplying method, inverter, and electric vehicle

Optical recording apparatus, and a method for controlling laser power therein

Optical disk reproducing apparatus having a cosine equalizer with boosted frequency characteristics

Optical disk device and method for discriminating optical disk

Optical drive apparatus for use with different recording media, tracking control method for use therein, and optical disc