Interlaced-to-progressive scanning converter with a double-smoother and a method therefor

An interlaced-to-progressive scanning converting apparatus for double-smoothing which prevents picture deterioration wherein the scanning method for a television signal is converted from an interlaced scanning method into a progressive scanning method, and a method therefor. The apparatus includes a double-smoothing circuit including a median-filter for median-filtering an interlaced scanning signal, a censoring circuit for censoring the median-filtered signal according to predetermined bias values, an order statistics filter (OSF) for setting a predetermined weighing coefficient according to the censored signal. The apparatus further includes an interlaced-to-progressive converter for converting the double-smoothed interlaced scanning signal into a progressive scanning signal. The apparatus and corresponding method, thus, prevent picture deterioration phenomena such as inter-line flickering, line crawling or stepped-shaped edges.