Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-12-17
1984-02-14
Richardson, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
369 43, 360 77, H04N 576, G11B 700, G11B 2110
Patent
active
044320213
ABSTRACT:
A rotary recording medium reproducing apparatus reproduces a rotary recording medium having a spiral video signal track recorded with a video signal by use of a reproducing element, where the recording medium further has a reference signal track between each information signal track turn alternately switched over and recorded with first and second reference signals for an interval corresponding to each track turn, and recorded with a third reference signal at a position corresponding to the position where the first and second reference signals are switched over. The reproducing apparatus comprises a standard signal generating circuit for generating first and second standard signals respectively having frequencies equal to the horizontal scanning frequency and the vertical scanning frequency of the recorded video signal, a waveform shaping circuit for synchronizing a reproduced third reference signal with the first standard signal from the standard signal generating circuit, and subjecting the reproduced third reference signal to waveform-shaping, a switching signal forming circuit for forming a switching signal in response to the second standard signal from the standard signal generating circuit and the signal from the waveform shaping circuit, and a circuit for obtaining a tracking control signal for controlling tracking of the reproducing element by switching reproduced first and second reference signals by the formed switching signal.
REFERENCES:
patent: 4315283 (1982-02-01), Kinjo et al.
patent: 4322836 (1982-03-01), Kinjo et al.
Handal Anthony H.
Richardson Robert L.
Victor Company of Japan Ltd.
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