Optical disk and optical disk drive device

Details Optical disk and optical disk drive device Optical disk and optical disk drive device

1998-10-30

2000-05-30

Neyzari, Ali

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, G11B 724

Patent

active

060698691

ABSTRACT:
In optical disk having information recording tracks in the form of land and groove tracks, the disk being divided into a plurality of annular zones, each revolution of the information recording track belonging to one of the zones, each revolution of the information recording track being divided into a plurality of sectors, the disk having a header portion at the head of each sector, the header portion including a recognition pattern which is formed of a sequence of pits having a pattern which is not used as a pattern for data or address in the information recording part. The disk may be of a land/groove single-spiral configuration. The header portion for each sector may have a plurality of sub-headers, including address of the sector, and first and second recognition patterns. The address of the sector, and the first recognition pattern may be provided, being shifted in one radial direction by half a track pitch, the second recognition pattern being provided, being shifted in the other radial direction by half a track pitch.

REFERENCES:
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patent: 5615205 (1997-03-01), Belser
patent: 5892740 (1999-04-01), Nagasawa et al.
Ohtake et al., "Composite Wobbled Tracking in the Optical Disk System", pp. 181-188 in Optical Memory Symposium '85 held on Dec. 12-13, 1985.
Kaku et al., "Investigation of Compensation Method for Track Offset", pp. 209-214, in Optical Memory Symposium '85, held on Dec. 12-13, 1985.

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