Method and apparatus for manufacturing pre-recorded videotape pr

Details Method and apparatus for manufacturing pre-recorded videotape pr Method and apparatus for manufacturing pre-recorded videotape pr

1991-11-12

1992-10-13

Swann, Tod R.

Cryptography

Cryptanalysis

380 15, 360 60, 358335, H04N 7167

Patent

active

051557673

ABSTRACT:
A method and apparatus for manufacturing a videotape from a video signal so as to inhibit the making of acceptable copies thereof. The video portion of a video signal from a video source is looped through a sync generator to a frame store to provide the video signal with new vertical positioning and blanking. The output video signal from the frame store is sent to a dual vertical sync inserter to insert a second vertical sync onto the video signal. The output video signal from the dual vertical sync inserter is then sent to a video recorder for recording onto a videotape.

REFERENCES:
patent: 4213149 (1980-07-01), Janko
patent: 4631603 (1986-12-01), Ryan
patent: 4695901 (1987-09-01), Ryan
patent: 4716588 (1987-12-01), Thompson et al.
patent: 4819098 (1989-04-01), Ryan
patent: 4888649 (1989-12-01), Kagota

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