Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1984-02-01
1985-12-10
Stellar, George G.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 102, G11B 558
Patent
active
045583820
ABSTRACT:
A video signal reproducing apparatus which is arranged to reproduce a composite signal formed by superimposing plural kinds of pilot signals of different frequencies upon a video signal one after another from recording tracks formed by the composite signal on a recording medium comprises: a plurality of reproducing heads arranged to trace the recording tracks one after another on the recording medium; a switch-over device for producing the outputs of the plurality of reproducing heads by switching them over from one to another; a reference signal generating device for producing plural kinds of reference signals of different frequencies which are substantially the same as those of the pilot signals; selecting device for selectively producing one of the plural kinds of reference signals generated by the reference signal generating means; a detecting device for detecting the positional errors of the reproducing heads relative to the recording tracks by using the reference signal obtained from the selecting means in conjunction with at least one of the plural kinds of pilot signals; and a control device for controlling the selecting means with the outputs of the reproducing heads not included in the output of the switch-over device.
REFERENCES:
patent: 4439799 (1984-03-01), Haubrich et al.
patent: 4497000 (1985-01-01), Terada et al.
Edakubo Hiroo
Takayama Nobutoshi
Takimoto Hiroyuki
Canon Kabushiki Kaisha
Stellar George G.
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