Systems and methods for detecting a change in a sequence of...

Details Systems and methods for detecting a change in a sequence of... Systems and methods for detecting a change in a sequence of...

2005-06-27

2008-09-02

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

07420626

ABSTRACT:
A method of detecting a change in a sequence of video data fields generated from a progressive scan source includes receiving first and second interlaced fields of a corresponding progressive scan frame from a sequence of interlaced fields generated from progressive scan source. Pixel values corresponding to pixel positions of pixel lines of a first parity of the first field are weaved with pixel values corresponding to pixel positions of pixel lines of a second parity of the second field. For each pixel value corresponding to each pixel position of each pixel line of the second field after weaving, a check is performed for the corresponding pixel position for feathering due to motion. A number of detected pixel positions with feathering due to motion is counted and compared against a threshold. A determination is made that the sequence of fields generated from the progressive scan source has not changed when the number of counted pixel positions due to motion is below the threshold and a determining that the sequence of fields generated from the progressive scan source has changed when the number of counted pixel positions due to motion is above the threshold.

REFERENCES:
patent: 5532751 (1996-07-01), Lui
patent: 6459455 (2002-10-01), Jiang et al.
patent: 7206028 (2007-04-01), Yeh et al.
patent: 7286185 (2007-10-01), Wong et al.
patent: 2006/0077305 (2006-04-01), Wyman

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