Video scrambling

Details Video scrambling Video scrambling

H - Electricity

04

N

H04N 7/167 (2006.01) H04N 7/169 (2006.01) H04N 7/171 (2006.01)

Patent

CA 2179787

A system for scrambling a video signal, wherein multiple modes of scrambling are available, including (i) line reversal, (ii) line inversion, (iii) line permutation, and (iv) block permutation. The invention changes the combination of modes used as time progresses. In addition, particular modes can be implemented, or suppressed, in response to such factors as (i) noise in the transmission channel and (ii) amount of motion within the video image.

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