A method of encrypting a video signal employing a pseudo-random Space Filling Curve having a highly irregular scanning pattern for scanning the pixel addresses of a video picture stored in a frame buffer. The method is used with a video scrambler/descrambler device and is characterized by a much higher...http://www.google.co.uk/patents/US4910772?utm_source=gb-gplus-sharePatent US4910772 - Video scrambling apparatus and method based on space filling curves
