| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image signal detecting apparatus and a method thereof capable of accurately detecting a 2:2 pull-down image as well as a 3:2 pull-down image and removing occurrence of a comb by bad-edit. <P>SOLUTION: The image signal detecting apparatus includes: a SAD(summed absolute difference) calculation unit for calculating SADs among a current field, a previous field, and a next field with respect to consecutively input image signals; a pull-down image detection unit for detecting a pull-down image on the basis of the respectively calculated SADs; a still image determining unit for detecting whether or not the input image signal is a still picture on the basis of the respectively calculated SADs and the absolute change amounts among the respective SADs; a bad-edit detection unit for detecting whether or not a bad-edit is caused in the detected pull-down image; and a decision unit for deciding whether the input image signal is the pull-down image or not on the basis of the result of detecting the pull-down image, the result of determining whether the input image signal is the still image by the still image judgment unit, and the result of detecting the occurrence of the bad-edit. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
