Loading patent…
AssigneeRicoh Company, Ltd.
InventorRyosuke Kasahara
Estimating the term…
A data reproduction apparatus for reproducing recorded data from an optical disk by using a PRML detection method is disclosed that includes an optical head including a light source, an optical system having an objective lens for condensing light emitted from the light source to the optical disk, and a photodetector for receiving light reflected from the optical disk, a signal generation circuit for generating an RF signal from a signal output from the photodetector, a phase correction circuit for correcting phase distortion of the RF signal when the recorded data are recorded in recording marks arranged with a pitch less than a diffraction limit, a clock extraction circuit for extracting a clock from the corrected RF signal, and a decoding circuit for decoding the recorded data from the RF signal in synchronization with the clock extracted by the clock extraction circuit.
A data reproduction apparatus for reproducing recorded data from an optical disk by using a PRML method, the recorded data of the optical disk being recorded in recording marks arranged with a pitch less than a diffraction limit, the data reproduction apparatus comprising:
Dependencies are inferred from the claim text.