Method of identifying inconsistent field dominance metadata in a sequence of video frames
View Patent ↗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.
1. 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.
2. The method of claim 1 , wherein the initial determination of the field order is indeterminate.
3. The method of claim 2 , wherein the indeterminate field order of an analyzed frame is replaced by the averaged field order.
4. The method of claim 3 , wherein the averaging step comprises allocating as the averaged field order the field order of a predetermined proportion of the predefined number of frames having the same field order.
5. The method of claim 4 , wherein the predefined number of frames over which the averaging step is performed is 25.
6. The method of claim 3 , wherein the predefined number of frames over which the averaging step is performed is 25.
7. The method of claim 2 , wherein the averaging step comprises allocating as the averaged field order the field order of a predetermined proportion of the predefined number of frames having the same field order.
8. The method of claim 7 , wherein the predefined number of frames over which the averaging step is performed is 25.
9. The method of claim 2 , wherein the predefined number of frames over which the averaging step is performed is 25.
10. The method of claim 1 , wherein the averaging step comprises allocating as the averaged field order the field order of a predetermined proportion of the predefined number of frames having the same field order.
11. The method of claim 10 , wherein the predetermined proportion of frames comprises at least 30%.
12. The method of claim 11 , wherein the predefined number of frames over which the averaging step is performed is 25.
13. The method of claim 10 , wherein the predefined number of frames over which the averaging step is performed is 25.
14. The method of claim 1 , wherein the predefined number of frames over which the averaging step is performed is 25.