Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-03-19
1984-01-24
Konick, Bernard
Facsimile and static presentation processing
Facsimile
Recording apparatus
358907, H04N 576
Patent
active
044280025
ABSTRACT:
In a special mode video disc reproduction system in which two identical frames of video signals are recorded for each disc revolution of spiral tracks, and further recorded with a first or a second reference signal having mutually different frequencies on a reference signal tract between adjacent tracks of the recording medium the first and second reference signals are alternately changed over and recorded on the reference signal track every one revolution of the disc, and the disc is further recorded with a third reference signal at the vertical blanking period recording positions of the corresponding recording positions on the track where the first and second reference signals are changed over. A skip pulse supplying circuit generates skip pulses for skipping the reproducing element at vertical blanking period positions opposing positions where the third reference signal is recorded on the track, upon double-speed reproduction mode in the forward direction. It generates skip pulses at two vertical blanking period positions other than the positions where the third reference signal is recorded and the vertical blanking period positions opposing these positions where the third reference signal is recorded upon triple-speed reproduction mode in the forward direction. And it generates skip pulses at three vertical blanking period positions other than the positions where the third reference signal is recorded, upon quadruple-speed reproduction mode in the forward direction. Such reproduction modes of operation eliminate undesired flicker in the reproduced picture.
REFERENCES:
patent: 4190859 (1980-02-01), Kinjo
patent: 4321621 (1982-03-01), Kinjo et al.
patent: 4322748 (1982-03-01), Tatsuguchi
patent: 4340907 (1982-07-01), Hirata et al.
Bernat Louis
Konick Bernard
McElheny Jr. Donald
Victor Company of Japan Ltd.
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