Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1989-08-15
1993-09-21
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 27, 360 62, G11B 1548
Patent
active
052474038
ABSTRACT:
In a DAT (digital audio tape) recorder in which data is recorded and reproduced in a helical scanning system by using a rotary head, a magnetic tape is firstly wound back for usual reproduction when performing reverse reproduction. Data thus reproduced is once memorized in a memory, and data is outputted in the reverse sequence of the reproduction sequence from the memory. In this kind of reverse reproduction movement, the total sum of the number of data in each recording area is obtained by detecting the number of data thereof when winding back the magnetic tape. Winding back is stopped when this total sum exceeds the memory capacity of the memory. After that, usual reproduction is carried out and data after the next recording area of the recording area in which the total sum exceeds the capacity of the memory is memorized one after another in the memory. Therefore, it is possible to vary the distance of winding-back of the magnetic tape according to the number of data recorded in the recording areas, thereby causing the memory to be very effectively utilized.
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Kiyonaga Chitoku
Sudoh Kengo
Canney Vincent P.
Sharp Kabushiki Kaisha
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