Television – Image signal processing circuitry specific to television – A/d converters
Reexamination Certificate
2006-02-16
2010-06-08
Ometz, David L (Department: 2622)
Television
Image signal processing circuitry specific to television
A/d converters
C348S537000, C348S536000, C348S739000
Reexamination Certificate
active
07733424
ABSTRACT:
A method and apparatus for an analog-to-digital video signal converter. The converter is controlled by a clock with controllable frequency and phase for sampling an analog signal. A measure of the difference between successive frames of the image is computed for a sequence of clock phases. The measure can be a count taken over pixels of the magnitude of the difference between a pixel in one frame and the corresponding pixel in a following frame exceeding a threshold value. The frequency of the clock is verified using a characteristic of the frame difference. The characteristic can be the ratio of the maximum measure to the minimum measure over the selected clock phases. Other characteristics can be used such as a difference of a maximum and a minimum measure.
REFERENCES:
patent: 5767916 (1998-06-01), West
patent: 5805233 (1998-09-01), West
patent: 5847701 (1998-12-01), Eglit
patent: 5990968 (1999-11-01), Naka et al.
patent: 6097444 (2000-08-01), Nakano
patent: 6700570 (2004-03-01), Tachibana et al.
patent: 7486336 (2009-02-01), Huang et al.
patent: 7502076 (2009-03-01), Xiu et al.
Dickinson Larry D.
Ethridge Troy Lane
Hayden John Michael
Ouyang Bing
Sundararajan Anuradha
Brady III Wade James
Brill Charles A.
Désir Jean W
Ometz David L
Telecky , Jr. Frederick J.
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