Recording position compensation circuit for use in digital infor

Details Recording position compensation circuit for use in digital infor Recording position compensation circuit for use in digital infor

1991-03-25

1992-12-22

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data recirculation

360 32, G11B 509

Patent

active

051738155

ABSTRACT:
A recording position compensation circuit for use in the digital information recording-reproduction apparatus of the present disclosure has a microprocessor for generating an offset signal indicating a deviation between standard signal processing time, which is required for a process wherein digital medium information already recorded on the recording medium is reproduced through the advanced reproduction head and re-recorded on the recording medium through the recording head, and inter-head travelling time required for the recording medium to travel a distance from the advanced reproduction head to the recording head. A first counter generates a reference symbol pointer indicating a reference of a sequence whereby digital information stored in the memory is read out so that a part of the digital information is rewritten. A second counter generates a compensated symbol pointer having a phase difference corresponding to the deviation with respect to the reference symbol pointer. Thus, since digital information is read out from the memory so that the signal processing time from reproduction to re-recording may coincide with the inter-head travelling time, a recording position on the recording medium at which rewriting is performed, is corrected.

REFERENCES:
patent: 4819087 (1989-04-01), Takeuchi et al.

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