Self-timed two-dimensional filter

摘要

A filter for filtering digital image data includes a timing circuit to convert received line sync signal and a received page sync signal to a new line sync signal and a new page sync signal and a NxM filter to filter digital data based on the new line sync signal, the new video valid signal and the new page sync signal. N is a value representing a filter dimension in a slow scan direction, and M is a value representing a filter dimension in a fast scan direction. The timing circuit causes the self-timed image processing device to output (N-1)/2 scanlines of unfiltered digital image data after the received page sync signal indicates an end of an input page.