Disk-shaped recording medium for recording and/or...

Details Disk-shaped recording medium for recording and/or... Disk-shaped recording medium for recording and/or...

G - Physics

11

B

352/32.21, 352/3

G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 7/085 (2006.01) G11B 7/09 (2006.01)

Patent

CA 2002601

A disk-shaped recording medium has a control record region in each recording region of successive recording tracks and which is divided into a first preformat region, a second preformat region and a focusing servo region arranged in succession in the direction along the respective track and respectively providing traverse data, tracking and clock data, and focusing servo data. An apparatus for reproducing data recorded in the tracks of such disk-shaped recording medium samples a playback output from an optical head scanning a track to detect focusing data from the focusing servo region and tracking data from the second preformat region and, in response thereto, applies focusing servo or tracking servo to the optical head. Further, traverse data is detected in the first preformat region to effect traverse counting of the recording tracks.

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