Magnetic recording/reproducing apparatus

Details Magnetic recording/reproducing apparatus Magnetic recording/reproducing apparatus

1987-08-10

1989-01-03

LaRoche, Eugene R.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 331, H04N 578

Patent

active

047961082

ABSTRACT:
A magnetic recording/reproducing apparatus, in which a video signal is recorded on and reproduced from a magnetic tape by helical scanning with a plurality of rotary magnetic heads, comprises a field memory storing a one-field portion of the video signal in accordance with an address signal, a circuit generating a control signal controlling memory read/write operations, a circuit generating a substituting signal substituting a predetermined period of the output signal of the field memory, and a circuit for setting the period of substitution, so that the substitution starting position is changed over in synchronism with the timing of starting the write operation.

REFERENCES:
patent: 4631603 (1986-12-01), Ryan
patent: 4743979 (1988-05-01), Okano et al.

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