Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1988-03-18
1989-12-19
Richardson, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
360 371, 380 7, 380 10, 380 15, H04N 5782
Patent
active
048886491
ABSTRACT:
A video tape on which a series of video signal to be reproduced as a series of visible images by a video signal reproducing apparatus is recorded together with disturbing signals for disturbing a video tape-recorder in copying the series of video signals so as to be normally reproduced by a video signal reproducing apparatus. Each of the video signals is accompanying by a back porch and a horizontal synchronous signal and the series of video signals is divided into a plurality of subseries of video signals with vertical retrace-sweep blanking periods interposed and the horizontal synchronous signals being contained also in the vertical retrace-sweep blanking periods. The disturbing signals include a series of first pulse signals inserted just after the horizontal synchronous signals and a series of second pulse signals inserted in a period after the horizontal synchronous signals wherein the period corresponds to the time of the back porch.
REFERENCES:
patent: 4163253 (1979-07-01), Morio et al.
patent: 4475129 (1984-10-01), Kagota
patent: 4488183 (1984-12-01), Kinjo
Richardson Robert L.
Shinano Kikaku Company Ltd.
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