METHOD AND DEVICE FOR PROTECTING HYBRID DIGITAL VIDEO RECORD ON FILM AND UNPROTECTED SOURCE MATERIAL AGAINST COPYING Russian patent published in 1999 - IPC

Abstract RU 2139639 C1

FIELD: computer engineering; video information recording and reproducing systems. SUBSTANCE: device reproducing video information recorded in digital form on record medium that implements existing method has record medium drive, digital output connected to it, analog-to-digital converter, and analog output. Novelty is that device has signal detector used to detect copy inhibit information in digital video signal and signal generator to shape analog copying protection signal in response to detected copy inhibit information, as well as to modify output analog video signal by means of generated copying protection analog signal; digital-to-analog converter is connected to record medium drive. EFFECT: provision for protecting any video information against copying. 47 cl, 2 dwg

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RU 2 139 639 C1

Authors

Dzhon O.Rian

Dates

1999-10-10Published

1994-03-04Filed