Dynamic magnetic information storage or retrieval – Record editing
Patent
1983-06-15
1986-09-09
Faber, Alan
Dynamic magnetic information storage or retrieval
Record editing
360 73, 360 70, H04N 5783, G11B 1546
Patent
active
046112529
ABSTRACT:
A video tape recorder has a simple helical-scan construction capable of variable-speed reproduction free from noise bars on reproduced images at desired speeds ranging from a normal speed in reverse reproduction to threefold normal speed in forward reproduction. The video tape recorder comprises a magnetic tape drive mechanism including a capstan motor and a pinch roller for driving a magnetic tape, a control circuit for moving the magnetic tape at constant speeds including a normal speed, a twofold speed, a threefold speed in forward reproduction and a normal speed in reverse reproduction, and for keeping the magnetic tape stationary, a speed setting circuit for setting any one of the foregoing speeds as a tape running speed, a control signal reproducing circuit for reproducing control signals recorded on the magnetic tape at one-frame intervals, a control signal selection circuit for selecting a control signal dependent on a speed setting from the reproduced control signals, a time setting circuit for varying a time setting starting from a control signal selected by the control signal selection means, and a speed changing circuit for changing the normal speed in reverse reproduction, the stationary, the normal speed, the twofold normal speed, and the threefold normal speed in a time interval of a few frames.
REFERENCES:
patent: 3934269 (1976-01-01), Fujita
patent: 4127881 (1978-11-01), Wakami
patent: 4212039 (1980-07-01), Koda
patent: 4328518 (1982-05-01), Kawata
patent: 4338640 (1982-07-01), Yabu
patent: 4393422 (1983-07-01), Yokobori
patent: 4426666 (1984-01-01), Koboyashi
Igata Kouichi
Kobayashi Masa-aki
Faber Alan
Matsushita Electric - Industrial Co., Ltd.
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