Method for controlling mode of information signal reproducing ap

Details Method for controlling mode of information signal reproducing ap Method for controlling mode of information signal reproducing ap

1987-04-29

1989-11-21

Faber, Alan

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 70, 360 7311, 360 7306, G11B 552, G11B 15467

Patent

active

048826413

ABSTRACT:
An information signal reproducing apparatus for reproducing an information signal from a recording medium on which a different pilot signals are recorded in a superimposed state upon the information signal in given rotation, with recording tracks formed at one of different selectable track pitches, is arranged: to generate, on the basis of the pilot signals reproduced by an information signal reproducing head, a tracking error signal indicative of the positional deviation of the head from one of the recording tracks; to count the number of times for which the positional deviation indicated by the tracking error signal reaches a predetermined degree for every given period of time; and to discriminate, on the basis of count value thus obtained, said one of track pitches at which the recording tracks are formed in recording.

REFERENCES:
patent: 4550345 (1985-10-01), Terada et al.
patent: 4594618 (1986-06-01), Kozuki et al.
patent: 4607298 (1986-08-01), Yamashita
patent: 4663673 (1987-05-01), Doutsubo
patent: 4680638 (1987-07-01), Childs
patent: 4680648 (1987-07-01), Takayama
patent: 4682247 (1987-07-01), Doutsubo
patent: 4683503 (1987-07-01), Takimoto

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