Abstract: Embodiments of the present invention provide a method of identifying inconsistent field order flags for a sequence of video frames comprising: for each frame in the sequence of video frames analyzing the frame to make an initial determination of the field order for that frame; averaging the initial determination of the field order over a predefined number of most recently analyzed frames; and determining those frames for which the averaged field order does not match the field order identified by a respective field order metadata item associated with each frame by comparing the averaged field order for each frame to the respective field order metadata item.

Abstract: A method of determining field dominance in a sequence of video frames, the method comprising: generating from a first video frame a top field and a bottom field; interpolating the top and bottom fields to produce an interpolated top field frame and an interpolated bottom field frame respectively; correlating each of the interpolated top field frame and interpolated bottom field frame with a second video frame occurring immediately previous to the first video frame in the sequence of video frames and with a third video frame occurring immediately subsequent to the first video frame in the sequence of video frames; and determining from the outcome of the correlation the field dominance of the sequence of video frames.

Abstract: A method of determining field dominance in a sequence of video frames, the method comprising: generating from a first video frame a top field and a bottom field; interpolating the top and bottom fields to produce an interpolated top field frame and an interpolated bottom field frame respectively; correlating each of the interpolated top field frame and interpolated bottom field frame with a second video frame occurring immediately previous to the first video frame in the sequence of video frames and with a third video frame occurring immediately subsequent to the first video frame in the sequence of video frames; and determining from the outcome of the correlation the field dominance of the sequence of video frames.

Abstract: Embodiments of the present invention provide a method of identifying inconsistent field order flags for a sequence of video frames comprising: for each frame in the sequence of video frames analyzing the frame to make an initial determination of the field order for that frame; averaging the initial determination of the field order over a predefined number of most recently analyzed frames; and determining those frames for which the averaged field order does not match the field order identified by a respective field order metadata item associated with each frame by comparing the averaged field order for each frame to the respective field order metadata item.

Abstract: A video classification method includes detecting pulldown video frames from within a sequence of video frames, for each video frame within said sequence identifying those frames containing inter-field motion, for each frame containing inter-field motion generating a corresponding top field and bottom field, separately correlating the generated top field with a top field of the video frame immediately previous to the frame containing inter-field motion and with a top field of the video frame immediately subsequent to the frame containing the inter-field motion, separately correlating the generated bottom field with a bottom field of the immediately previous video frame and with a bottom field of the immediately subsequent video frame and determining from the outcome of said correlations if the frame containing inter-field motion is a pulldown frame.