Patent ID: 7450184

Claim:
A method of detecting a stream of video data generated utilizing a pull-down technique comprising: receiving a sequence of fields of interlaced video data; for each pair of a plurality of pairs of the fields of interlaced video in the sequence: weaving pixel values corresponding to pixel positions of pixel lines of a first parity of a first field of the pair of fields with pixel values corresponding to pixel positions of pixel lines of a second parity of a second field of the pair of fields; for each pixel value corresponding to each pixel position of each pixel line of the second field of the pair of fields after weaving, checking for feathering at the corresponding pixel position due to motion; and counting the pixel positions with feathering due to motion in the second field of the pair of fields; and for the plurality of pairs of fields in the sequence, checking for a pattern in the number of counted pixel positions with feathering due to motion in the second field of each pair of fields to determine if the video data comprises data generated utilizing a pull-down technique.