Patent ID: 8189103

Claim:
A pull-down detection apparatus for detecting that an input video signal is generated by pull-down processing, said pull-down detection apparatus comprising: a pixel comparator at least performing pixel comparison between a first field contained in the input video signal and a second field that is one-field before the first field and determining a presence of a pixel change between the first field and the second field; a field comparator compiling a determination result in the pixel comparator by dividing the result according to pixel location in the fields and compiling a determination result for each divided result, each said divided result being less than a complete field, applying a predetermined rule to selectively determine which one or ones of the divided results are to be used for a determination result for an entirety of the first field, and determining a presence of an image change between the first field and the second field based on the selected at least one divided and compiled determination result; and a pull-down determinater determining that the input video signal is generated by pull-down processing based on a history of a determination result in the field comparator.