This invention discloses a new and improved method of scrambling video signals by inversion of the video information by splitting the sync pulse into plural portions and transmitting each portion of the sync pulse at a predetermined level. This improves the quality of the recovered video compared with...http://www.google.de/patents/US5142575?utm_source=gb-gplus-sharePatent US5142575 - Method and apparatus for improving video scrambling and employing split sync pulses
