Television – Image signal processing circuitry specific to television – Motion dependent key signal generation or scene change...
Reexamination Certificate
2005-06-27
2008-11-11
Tran, Trang U (Department: 2622)
Television
Image signal processing circuitry specific to television
Motion dependent key signal generation or scene change...
C348S441000, C348S448000, C348S452000
Reexamination Certificate
active
07450184
ABSTRACT:
A method of detecting a stream of video data generated utilizing a pull-down technique includes receiving a sequence of fields of interlaced video data. For each pair of a plurality of pairs of the fields of interlaced video in the sequence, pixel values corresponding to pixel positions of pixel lines of a first parity of a first field of the pair of fields are weaved with pixel values corresponding to pixel positions of pixel lines of a second parity of a second field of the pair of fields. For each pixel value corresponding to each pixel position of each pixel line of the second field of the pair of fields after weaving, a check is made for feathering at the corresponding pixel position due to motion. The pixel positions with feathering due to motion in the second field of the pair of fields are counted, and, for the plurality of pairs of fields in the sequence, a check is made for a pattern in the number of counted pixel positions with feathering due to motion in the second field of each pair of fields to determine if the video data comprises data generated utilizing a pull-down technique.
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Bounds Brian F.
Gallagher William Lynn
Pillay Sanjay R.
Magnum Semiconductor, Inc.
Murphy James J.
Thompson & Knight LLP
Tran Trang U
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