Patent ID: 8718448

Claim:
A method of identifying a frame rate conversion process used to generate a video comprising a sequence of frames, each frame comprising first and second fields, the method comprising: selecting a group of consecutive frames from the sequence of frames; comparing, at a computer, a first correlation score that quantifies a correlation between the second field of a first frame and the first field of a second frame with a second correlation score that quantifies a correlation between the first and second fields of the second frame, the second frame immediately following the first frame in the sequence of frames wherein a correlation score between any pair of first and second fields is computed by: creating an interpolated second field through interpolation using the first field of the pair; comparing the interpolated second field with the second field of the pair; creating an interpolated first field through interpolation using the second field of the pair; and comparing the interpolated first field with the first field of the pair; and based on the comparison, identifying a pattern of repeated fields in the group of frames in order to identify the frame rate conversion process used to generate the video.