Rotating head type recording/reproducing apparatus which uses wi

Details Rotating head type recording/reproducing apparatus which uses wi Rotating head type recording/reproducing apparatus which uses wi

1994-10-04

1996-03-26

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 64, 360 7715, G11B 502

Patent

active

055026036

ABSTRACT:
A recording head Hw1 records a record signal including a data region, a pilot signal region, and a mask region with a width of 3 Tp. A recording head Hw2 overwrites the record region of the head Hw1 with another data. Since the recorded signal includes the mask region, the pilot signal region recorded by the head Hw1 is not erased. The recording head Hw1 overwrites with a record signal. At this point, since the recorded signal contains a mask region, the former pilot signal region is not erased. Instead, a new pilot signal region is formed. By repeating these operations, pilot signal regions are adjacently formed at track edges of a track corresponding to the recording head Hw1. Since the pilot signal is reproduced by a reproducing head with the same azimuth as the recording head, the pilot signal with a short wavelength can be used.

REFERENCES:
patent: 4388657 (1983-06-01), Hedlund et al.
patent: 4665447 (1987-05-01), Odaka
patent: 4739420 (1988-04-01), Odaka et al.
patent: 4785360 (1988-11-01), Kozuki et al.
patent: 4920435 (1990-04-01), Yamazaki
patent: 5142422 (1992-08-01), Zook et al.
patent: 5243474 (1993-09-01), Mitsuhashi
patent: 5432648 (1995-07-01), Watanabe et al.

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