Magnetic reproducing apparatus and method for high speed search

Details Magnetic reproducing apparatus and method for high speed search Magnetic reproducing apparatus and method for high speed search

1992-06-18

1995-05-23

Pstios, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 721, 360 744, G11B 1548

Patent

active

054186633

ABSTRACT:
A magnetic tape reproducing apparatus and method is capable of reliably detecting the leading edge of a program to be reproduced without any malfunction even at the time of a high-speed search. During a 200-times normal speed high-speed search in the reproducing direction of a magnetic tape derived from the drive of a feed reel 14 and a take-up reel 15, a microcomputer 27 applies a brake to both reels in response to the detection of a start ID by a rotary head 11. From this detection of the start ID until the stop of the tape, reel pulses input from sensors 16 and 17 (from the rotation of the reels) are counted. After the tape comes to rest, the tape is compulsority rewound at a lower speed (10-times speed) dependent on the counted number of the pulses. After the completion of the compulsory rewinding, a 10-times speed rewinding follows with the lead edge of the start ID being detected, thereby eliminating an unstable contact condition which may be produced between the rotary head 11 and the magnetic tape 12 immediately after the stoppage of the tape, and presenting a more accurate detection of the start ID.

REFERENCES:
patent: 4689699 (1987-08-01), Harigaya et al.
patent: 4737868 (1988-04-01), Kimura et al.
patent: 4837640 (1989-06-01), Ozaki et al.
patent: 4958244 (1990-09-01), Inazawa et al.
patent: 5274513 (1993-12-01), Nakano et al.

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