Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1975-07-18
1980-01-22
Moffitt, James W.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 70, 358114, 179 15C, H04N 578
Patent
active
041853059
ABSTRACT:
Methods and apparatus for recording and subsequently reproducing video signals including video and synchronization information initially record the video signals and first control information distinct from said video and synchronization information on a recording medium. The video signals are subsequently reproduced with the aid of second control information being distinct from said video and synchronization information for controlling the reproduction of the video signals from the recording medium. The mentioned first control information is rendered incapable as recorded of controlling the reproduction of the video signals upon reproduction of the first control information, and the second control information is provided by reproducing the recorded first control information from the recording medium and converting at least part of the reproduced first control information to the second control information.
REFERENCES:
patent: 2601505 (1952-06-01), Ellett
patent: 3067280 (1962-12-01), Schlafly, Jr.
patent: 3460161 (1969-08-01), Waller et al.
patent: 3919462 (1975-11-01), Hartung et al.
patent: 4030128 (1977-06-01), Perret
Miller James A.
Perret Ludwig A.
Bell & Howell Company
Moffitt James W.
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