Detecting video formats

摘要

The format of telecined video may be determined including a bottom field first cadence. In addition, video using 2:3:3:2 top field first can be identified. Moreover, mixed cadence videos can also be detected. In some embodiments, mixed cadence videos may be detected by calculating variances of different areas within a frame.

主权项

1. A method comprising:
identifying mixed cadence videos, wherein mixed cadence videos are videos which have two different cadences in the same display or frame by calculating three variances, the first variance being a difference between top field recognition between a current and previous frame, a second variance between a difference between bottom field repetition between a current and previous frame and a third variance based on a difference between a current top field and bottom field.