For processing data signals representative of pixels, each of the picturess scanned, column per column in successive horizontal bands each having a height equal to an entire fraction of the height of the picture, whereby a representation of the picture as pixels distributed in rows and columns is obtained,...http://www.google.ca/patents/US5099325?utm_source=gb-gplus-sharePatent US5099325 - Process and circuit for block matching in two-dimensional picture signals
