Optical disc having plural zones of recording tracks

Details Optical disc having plural zones of recording tracks Optical disc having plural zones of recording tracks

1994-08-24

1998-08-18

Neyzari, Ali

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692753, G11B 724

Patent

active

057967113

ABSTRACT:
An optical disc of a sampled servo tracking method excludes unnecessary interference to wobbled pits of the servo area, whereby a tracking servo can be stably performed, a high density maintained, and a large recording capacity obtained. An optical disc in which a circular recording area comprising a plurality of concentric tracks or a spiral recording track which hold information signals including sync signals is divided into a plurality of zones bounded by circular boundary areas. The recording track is constituted by a plurality of sectors each comprising servo areas and data areas, the servo areas being located along straight lines in radial directions within the zone. The track pitch of the boundary area is made larger than the track pitch within the zone.

REFERENCES:
patent: 4329575 (1982-05-01), Roach
patent: 4341952 (1982-07-01), John et al.
patent: 5255261 (1993-10-01), Iida et al.
patent: 5345435 (1994-09-01), Yamasaki
patent: 5377178 (1994-12-01), Saito et al.
patent: 5418773 (1995-05-01), Bakx et al.
patent: 5446724 (1995-08-01), Tabe et al.

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