H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/20
H04N 7/167 (2006.01) H04N 7/169 (2006.01)
Patent
CA 1338158
A video signal is encrypted by pseudo-random variation of portions of lines thereof to be horizontally scanned that are devoid of video information. Thus, the durations of line blanking intervals may be varied. The variation is done in accordance with an encryption key which is employed at the receiver to decrypt the encrypted video signal.
430777
Lowry John D.
Lucas Keith
Digital Video Systems Corp.
Sim & Mcburney
LandOfFree
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