Method of and apparatus for movement portrayal with a raster, e.g. television, display

摘要: To portray movement in a television display, field of the signal is stored an image store (110), and subsequent input fields are compared motion detector (104) with sorted to detect differences between them due movement. A flag retained auxiliary (114) indicate positions detected differences. For those for which new difference detected, i.e. no has been previously, corresponding portions then current scan by switch (106) being connected (102). flagged, output causes take thus insetting past into field. The background nevertheless updated allow 4-field NTSC or 8-field PAL cycle, transducers, predictors, (170,160) placed at (110) such that retains information one state only cycle. comprises subtractor, rectifier low- pass filter.