Patent ID: 8120702
Filing Date: 2012-02-21
Classification: H04N

Abstract:
1. A detection device, comprising: a difference distribution information generation unit which calculates a difference absolute value in pixels between frames for an input interlace image, compares the difference absolute value with a plurality of thresholds, adds the comparison result for one field, and generates a plurality of counts; an information table creation unit which detects whether or not the interlace image of a current field includes noise and if the current field is a repeat field, based on the plurality of counts, and stores a flag indicating whether or not the current field is the repeat field for m (m is 5 or higher integer) fields in a first information table when the current field including the noise is detected, or in a second information table when the current field not including the noise is detected, respectively; and a repeat field judgment unit which refers to the first or second information tables based on whether or not the current field includes noise, judges that the current field is the repeat field when the flag indicating the repeat field in the current field and a field which is 5 fields before is stored and the flag indicating not the repeat field between the current field and the field which is 5 fields before is stored, in the first or second information table, and judges that the current field is not the repeat field when not.