Means for compatibly reproducing video discs recorded according

Facsimile and static presentation processing – Facsimile – Recording apparatus

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Details

358372, 358330, H04N 9491, H04N 944

Patent

active

RE0321940

ABSTRACT:
A rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium by use of a reproducing element. The rotary recording medium is recorded with at least a first carrier signal which is modulated by an information signal having a synchronizing signal of a predetermined frequency. The reproducing apparatus comprises a motor for rotating the rotary recording medium, a reference signal generating circuit for generating a reference signal having a frequency equal to a horizontal scanning frequency of a video signal of a standard television system which is characteristic of the reproducig apparatus and should originally be reproduced, or equal to 1/M (M is an integer) times the above horizontal scanning frequency, a detecting circuit for detecting a signal respective of the rotational speed of the rotary recording medium, and a comparator for comparing the reference signal and the signal respective of the rotational speed of the rotary recording medium, to control the rotational speed of the rotary recording medium by a compared output signal thus obtained, so that the synchronizing signal within the reproduced signal is reproduced at a frequency equal to the horizontal scanning frequency of the above standard television system with which the reproduction should originally be performed.

REFERENCES:
patent: 3389231 (1968-06-01), Brundage
patent: 3580990 (1971-05-01), Numakura
patent: 3917415 (1975-11-01), Eguchi
patent: 3934262 (1976-01-01), Snopko
patent: 4123779 (1978-10-01), Goldschmidt
patent: 4148077 (1979-04-01), Bragas
patent: 4223349 (1980-09-01), Dakin et al.
patent: 4282545 (1981-08-01), Bragas
patent: 4313191 (1982-01-01), Winslow et al.
patent: 4315283 (1982-02-01), Kinjo et al.
patent: 4338683 (1982-07-01), Furukawa et al.

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