Patent ID: 7269220

Claim:
Apparatus for detecting motion represented by video pixels having digital pixel values comprising: a memory arranged to store filtered pixel first values corresponding to first pixels processed by the apparatus during a first time period; and a motion detector responsive to differences between the first values and pixel second values corresponding to second pixels processed by the apparatus during a second time period later than the first time period to generate motion signals representing detected motion of images represented by the first pixels relative to motion of images represented by the second pixels, wherein the second pixels correspond to lines comprising a horizontal first line and a horizontal second line, wherein a pixel being processed lies in the first line, wherein the images define moving edges and wherein the motion detector comprises: a third filter responsive to pixels in the first and second lines and responsive to the differences between the first values and the second values to generate initial motion signals representing an estimate of the detected motion of images; and a transfer function module arranged to generate the motion signals in response to the initial motion signals and characteristics of the images.