Scrambling system for television sound signals

Details Scrambling system for television sound signals Scrambling system for television sound signals

H - Electricity

04

N

379/1, 350/30

H04N 7/16 (2006.01) H04N 7/088 (2006.01) H04N 7/169 (2006.01)

Patent

CA 1123951

17 46,529 ABSTRACT OF THE DISCLOSURE An audio scrambler operates on segments of audio divided from a continuous audio signal to rotate head-to- tail the string of information contained in the segment by an amount which is at pseudo-random between the successive segments. When the segments are compressed to video format, the scrambled compressed audio signals are in- serted into an unused line of the vertical blanking space of a television system for transmission with the video signals. The inserted audio is combined with decoy sig- nals, also in the vertical blanking space to increase security of transmission. Concurrent scrambling of com- pressed audio signals and video signals is provided.

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