Dynamic magnetic information storage or retrieval – Record editing
Patent
1987-09-08
1989-08-22
Faber, Alan
Dynamic magnetic information storage or retrieval
Record editing
360 141, 360 66, 360 18, 360 27, 360 7714, 360 7715, G11B 2702, G11B 2708, G11B 5592
Patent
active
048601250
ABSTRACT:
When a record carrier (14) is inscribed for an n.sup.th time (n>1), in which record carrier the information is recorded in first blocks (FB) in tracks (T.sub.1, T.sub.2, . . . ) which adjoin each other and which are inclined relative to the longitudinal direction of the record carrier, each track containing at least one first block (FB.sub.1) of information and at least one second block (SB.sub.1) of tracking signals (f), only the first blocks of new information are written over the first blocks recorded previously in the tracks and the second blocks of tracking signals are not erased from the record carrier. These second blocks are employed for the purpose of tracking when the record carrier is inscribed for the n.sup.th time. In this way it is achieved that the new information is recorded exactly in the original tracks, so that perfect inserts can be made.
REFERENCES:
patent: 4533963 (1985-08-01), Nakano et al.
patent: 4602298 (1986-07-01), Nishitani et al.
patent: 4739420 (1988-04-01), Odaka et al.
patent: 4768106 (1988-08-01), Ito et al.
Faber Alan
Garland Steven R.
U.S. Philips Corporation
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