Combined longitudinal and transversal tracking

Details Combined longitudinal and transversal tracking Combined longitudinal and transversal tracking

1997-12-15

2000-09-19

Loomis, Paul

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 48, 360 7707, 360 7708, 360 7711, G11B 5584

Patent

active

061221341

ABSTRACT:
An information storage medium has at least a longitudinal bundle comprising three servo tracks (3, 4, 5). The bundle is arranged in consecutive tracking units (T(N)) of a determined longitudinal length. Surfaces of said servo tracks present either a first or a second characteristic (6, 7) and vary in size and distribution inside the tracking units. The bundles may contain longitudinally stored identification information. Methods for obtaining tracking signals indicating a transversal offset between a reading head and the bundle and for retrieving identification information are disclosed. Also methods for obtaining tracking units in which transversal tracking code is combined with distinct information are described.

REFERENCES:
patent: 3691543 (1972-09-01), Mueller
patent: 3812533 (1974-05-01), Kimura et al.
patent: 4400747 (1983-08-01), Siverling
patent: 5448430 (1995-09-01), Bailey et al.

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