Detection of progressive pulldown in a video sequence

Details Detection of progressive pulldown in a video sequence Detection of progressive pulldown in a video sequence

2007-06-21

2011-12-13

Harold, Jefferey (Department: 2422)

Television

Format conversion

C348S556000

Reexamination Certificate

active

08077257

ABSTRACT:
System and methods for the detection of progressive pulldown in a video sequence are provided. The method comprises calculating a difference between temporally adjacent frames in the video sequence, generating a pattern based upon these differences, and comparing the generated pattern against patterns understood for known progressive film modes in order to determine if the video sequence comprises a known progressive film mode. In one embodiment, the pattern may be adjusted to account for uncertainty in assigning values to the pattern, reducing the likelihood of false detections. In another advantage, confidence metrics are built into the method in order to further reduce the incidence of false detections.

REFERENCES:
patent: 5317398 (1994-05-01), Casavant et al.
patent: 2004/0114048 (2004-06-01), Jung et al.

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