Magnetic recording reproducing apparatus with time code recordin

Details Magnetic recording reproducing apparatus with time code recordin Magnetic recording reproducing apparatus with time code recordin

1992-12-11

1994-08-30

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

360 141, 360 143, G11B 502, G11B 2702

Patent

active

053433360

ABSTRACT:
A first apparatus for recording/reproducing a video signal on/from a magnetic tape has a delay for delaying a composite sync (synchronizing) signal obtained from a reproduced video signal; a signal adding circuit for adding a VITC (vertical interval time code) signal to the delayed composite sync signal; a switch circuit for switching the mode of the apparatus between recording and reproducing modes; and a timing circuit. The composite sync signal is delayed by the delay, then the VITC signal is added thereto. The VITC-added composite sync signal is recorded for a predetermined horizontal scanning line(s) by switching the switch circuit. The delay is provided to maintain reception of the composite sync signal during the recording mode and to compensate delay in the loop from the reproducing circuitry to a circuitry for recording the VITC-added composite signal. Thus, the VITC signal can be written or rewritten over the recorded magnetic tape. A second apparatus also can overwrite the VITC signal by generation of a quasi-composite signal from the reproduced composite sync signal, having lead to the reproduced composite sync signal to compensate the circuit delay.

REFERENCES:
patent: 4134130 (1979-01-01), Tachi
patent: 4167759 (1979-09-01), Tachi
patent: 4706135 (1987-11-01), Kojima
patent: 4766506 (1988-08-01), Yagi et al.
patent: 5012356 (1991-04-01), Kosaka
patent: 5173812 (1992-12-01), Reime
patent: 5177619 (1993-08-01), Sato

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