METHOD AND SYSTEM FOR DETECTING MOTION BETWEEN VIDEO FIELD OF SAME AND OPPOSITE PARITY FROM AN INTERLACED VIDEO SOURCE

A method and system for detecting the motion between a video field and its previous and subsequent video fields at a specified position. The motion detection scheme and system allows signal values of one set of vertically adjacent pixels from a video field of one parity and two other sets of vertically adjacent pixels from two neighboring video field of opposite parity to be measured such that when taken together, these pixels represent relevant sample of an image near the vertically and temporal position of the video field. The motion detection scheme also allows the calculation of three motion values between the video field and its previous video field, the video field and its subsequent video field and the previous and subsequent fields of the same video field. The overall level of motion at the field being measured is determined by combining the information from the three motion values calculated at the specified spatial and temporal location.