Apparatus for detecting telecine conversion method of video signal

A telecine conversion method detecting apparatus comprising:

• an inter-field calculator for performing intra-field interpolation processing every field of a video signal one field before an input video signal to generate an interpolated video signal, and accumulating an absolute value of an inter-field difference signal every field for image components within a predetermined area in accordance with a difference between said input video signal and said interpolated video signal to calculate an inter-field difference accumulated value;
• an inter-field holder for holding an inter-field difference accumulated value of a current field output from said inter-field calculator to output an inter-field difference accumulated value of a previous field preceding the inter-field difference accumulated value of said current field;
• a first detector for detecting that the inter-frame difference accumulated value of said previous field is equal to or greater than a motion threshold value for motion field determination, that the inter-frame difference accumulated value of said current field is equal to or less than a still threshold value for still field determination, and that the inter-frame difference accumulated value of said current field is less than a corrected value calculated by multiplying the inter-field difference accumulated value of said previous field by a predetermined coefficient, to generate a first detection signal;
• and
• a first determining device for determining that said input video signal is a telecine converted video signal generated from a movie film based on a 2-2 pull-down method in response to said first detection signal.