Copy control for a video signal with copyright signals...

Details Copy control for a video signal with copyright signals... Copy control for a video signal with copyright signals...

H - Electricity

04

N

H04N 5/76 (2006.01) G11B 20/00 (2006.01) H04N 5/913 (2006.01) H04N 5/92 (2006.01) H04N 7/08 (2006.01)

Patent

CA 2120380

A video signal is processed to selectively permit copying by superposing in that portion of the video signal which does not contain useful picture information a copyright information signal indicative of whether the viewable picture that is displayed from the video signal is subject to copyright and a copy generation signal indicative of the number of successive generations of copies that can be made from the video signal.

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