Patent ID: 6965414

Claim:
A telecine conversion method detecting apparatus comprising: an inter-frame calculator for accumulating an absolute value of an inter-frame difference signal for image components in a predetermined area of each field of an input video signal in each field to calculate an inter-frame difference accumulated value; an inter-frame holder for holding the inter-frame difference accumulated value of a current field output from said inter-frame calculator to output inter-frame difference accumulated values of four fields preceding the inter-frame difference accumulated value of said current field; a first detector for detecting that the inter-frame difference accumulated value of said current field is equal to or less than a first still threshold value for still field determination, that each of the inter-frame difference accumulated values of said four preceding fields is equal to or greater than a first motion threshold value for motion field determination that is greater than said first still threshold value, and that the inter-frame difference accumulated value of said current field is less than each corrected value calculated by multiplying each of the inter-frame difference accumulated values of said four preceding fields by a first predetermined coefficient, to generate a first detection signal; and a first determining device for determining in response to said first detection signal that said input video signal is a telecine converted video signal generated from a movie film based on a 2-3 pull-down method.