Patent ID: 8330858

Claim:
A pull-down detection apparatus for detecting that an input video signal is generated by a 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 a pixel location in the fields, each said divided result being less than a complete field, selecting at least one of the divided and compiled determination results according to a predetermined rule, 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, and changing a condition for determining a presence of a pixel change in the pixel comparator based on a history of pull-down determination by the pull-down determinater.