Patent ID: 7764584
Filing Date: 2010-07-27
Classification: G11B

Abstract:
1. A reproducing apparatus that reproduces data from a hologram recording medium in which data inserted with syncs at predetermined intervals is recorded in each predetermined page unit by interference fringes of reference light and signal light, the reproducing apparatus comprising: reference-light irradiating means for irradiating the reference light on the hologram recording medium; signal readout means for receiving diffractive light corresponding to the data recorded on the hologram recording medium, which is obtained by the irradiation of the reference light on the hologram recording medium, and obtaining a readout signal; sync-position detecting means for detecting, in detecting positions of the syncs that should be inserted in the readout signal obtained by the signal readout means, a position of a detection object sync on the basis of positions of plural syncs selected with the position of the detection object sync as a reference; and amplitude-value calculating means for specifying positions of respective recording pixels in the readout signal on the basis of the positions of the respective syncs detected by the sync-position detecting means and calculating amplitude values of the respective pixels.