Patent ID: 7881177
Filing Date: 2011-02-01
Classification: G11B

Abstract:
1. An apparatus for reproducing data on a recording medium on which the data is recorded in units of clusters, the apparatus comprising: a control unit to move an optical head unit to a target location of the recording medium at which data corresponding to address unit number (AUN) address information is recorded; and a pickup unit to reproduce the data at the target location of the recording medium; wherein each of the clusters comprises a plurality of address fields; each of the address fields comprises 32-bit AUN address information; and the 32-bit AUN address information comprises: a reserved area being a highest-order 4 bits of the 32 bits; a capacity expansion area being a next-highest-order 1 bit of the 32 bits after the highest-order 4 bits; layer information indicating a layer on which data corresponding to the AUN address information is recorded, the layer information being a next-highest-order 3 bits of the 32 bits after the next-highest-order 1 bit; and location information indicating a location of the data corresponding to the AUN address information, the location information being a lowest-order 24 bits of the 32 bits.