Film mode detection method using periodic pattern of video sequence
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United States of America Patent
Stats
-
Aug 31, 2004
Grant Date -
Jun 7, 2001
app pub date -
Dec 1, 2000
filing date -
Dec 2, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A film mode detection method using a periodic pattern of a video sequence comprises the steps of: computing every absolute value of differences between every pair of corresponding pixels in two fields which are arranged within a predetermined distance on a time line; comparing a sum of the absolute value of differences between every corresponding pixels in two fields with the first predetermined threshold value M1 and limiting the sum to the first threshold value if the sum is greater than the first threshold value; filtering the video sequence and calculating a power of the filtered sum; and comparing the calculated power with the second predetermined threshold value M2 so as to determine the signal as a film mode if the power of the sum is greater than the second threshold value.
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