Vorrichtung zur Detektion der relativen Bewegung zwischen Inhalten von aufeinanderfolgenden Halbbildern eines Videosignals

摘要

In an apparatus for detecting amounts of relative motion of a picture expressed by a digital video signal, between successive fields of the signal, a fixed set of picture element positions are designated as respective representative points in each field of the video signal. For each representative point, the signal level value for that point during a preceding field is compared with each of a successive of picture element values in the current field, within a corresponding comparison interval which extends prior to and subsequent to the position of that representative point in the field. In addition, a corresponding value of relative distance between each picture element for which a result is obtained and that representative point is derived as a binary value, and the result is cumulatively stored with corresponding results for other representative points in an address of one of a plurality of memory sections, with the particular memory section being assigned in accordance with the state(s) of one or more high-order bits of the corresponding relative distance value and the address being assigned in accordance with the remaining low-order bits of that distance value.