Phantom raster scanning of an image memory, in which the image is stored in compacted form, is made possible by introducing offsets in strictly spatial coordinates, rather than in time coordinates parallelling a particular spatial coordinate system....http://www.google.fr/patents/US4442545?utm_source=gb-gplus-shareBrevet US4442545 - Compaction of television display graphics in phantom-raster-scanned image memory
Compaction of television display graphics in phantom-raster-scanned image memory
