Reproducing apparatus for reproducing recorded signals from a ro

Details Reproducing apparatus for reproducing recorded signals from a ro Reproducing apparatus for reproducing recorded signals from a ro

1984-01-10

1985-12-24

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358342, 358907, 369 50, H04N 576, G11B 2110

Patent

active

045610266

ABSTRACT:
A reproducing apparatus comprises a reproducing circuit including a pickup reproducing element, for reproducing recorded signals from a rotary recording medium, an address signal reproducing circuit for reproducing a track shift address signal from the signals which are reproduced by the reproducing circuit, a detecting circuit for detecting whether the address signal is reproduced with a predetermined period, a memory for storing the value of the reproduced address signal or a flag which is related to the value of the reproduced address signal, when the detecting circuit detects that the address singal is reproduced with the predetermined period, and a circuit for generating a control signal which causes the pickup reproducing element to undergo a forced track shift at predetermined positions on the tracks so that the pickup reproducing element scans along a scanning locus which has the same periodicity as the scanning locus along which the pickup reproducing element had been scanning up to that point. The control signal is generated based on the value of the reproduced address signal when the detecting circuit detects that the address signal is reproduced with the predetermined period, and based on one or a plurality of values which are pre-stored in the memory when the detecting circuit detects that the address signal is not reproduced with the predetermined period.

REFERENCES:
patent: 4142209 (1979-02-01), Hedlund et al.
patent: 4308557 (1981-12-01), Dieterich
patent: 4428003 (1984-01-01), Sugiyama et al.
patent: 4432021 (1984-02-01), Kaneko
patent: 4488278 (1984-12-01), Dieterich
patent: 4490752 (1984-12-01), Machida et al.
patent: 4499505 (1985-02-01), Sugiyama et al.

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