Dynamic magnetic information storage or retrieval – Record editing
Patent
1980-03-24
1982-04-13
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Record editing
360 33, 360 66, 358182, H04N 579
Patent
active
043250882
ABSTRACT:
A video camera is provided with means for producing lap and/or dissolve effects between successively recorded scenes. Means are provided for controlling the level of AC bias accompanying the video signals applied to a magnetic recording head. A dissolve effect is achieved by gradually decreasing the level of such bias at the end of a recorded scene. A lap effect is achieved by gradually increasing the bias level at the beginning of a new scene. A simultaneous lap and dissolve effect is achieved by performing the individual lap and dissolve effects on the same segment of tape. To do this, the tape drive is reversed at the end of each scene to position the dissolved portion of the scene upstream of the magnetic recording head. Upon recording a new scene while gradually increasing the level of AC bias at the beginning thereof, a simultaneous lap and dissolve effect is achieved automatically.
REFERENCES:
patent: 3296367 (1967-01-01), Cassagne
patent: 3368032 (1968-02-01), Gooch
patent: 3392231 (1968-07-01), Schonfelder
patent: 3673324 (1972-06-01), Ito
patent: 3721757 (1973-03-01), Ettlinger
patent: 3974522 (1976-08-01), Fukatsu
patent: 3975764 (1976-08-01), Kabayashi
patent: 3982274 (1976-09-01), Chai
patent: 4001882 (1977-01-01), Fiori
patent: 4040098 (1977-08-01), Beeson
"Cut/Lap A New Method for Programmable Fade and Soft Edit transpositions using a single source VTR" by G. W. Bates-SMPTE Journal, 1974, vol. 88, pp. 160, 161.
Canney Vincent P.
Cody Robert F.
Eastman Technology Inc.
Faber Alan
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