Motion detector for video signals including a novel line comparison processing scheme

摘要

A motion vector suitable for motion-compensated prediction in an inter- frame differential video coder is derived by comparison of each block of a current frame and with shifted corresponding region of a previous frame with the regions of the previous frame. Rather than dealing with each block in turn, the apparatus carries out all comparisons involving a line n of the video signal before commencing comparisons involving n+p (where p is the number of lines encompassed by a block).