Method and system for enhancing resolution in a video signal...

Details Method and system for enhancing resolution in a video signal... Method and system for enhancing resolution in a video signal...

2005-06-14

2005-06-14

Kostak, Victor R. (Department: 2614)

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

C348S572000, C341S061000

Reexamination Certificate

active

06906757

ABSTRACT:
A digital video signal processing system monitors the rate of change of the digital video signal to detect large rates of change that indicate the presence of an object edge in the video image. Upon detection of such an edge, the digital signal is sampled at a variable rate so that more sampling is performed immediately before and after the sudden change in the signal and less sampling is performed during the change. The result is that the edge in the video image occupies less pixels and, therefore, is more clear and defined that would be the case otherwise. Consequently, the appearance of the video image is enhanced. This can be considered as the digital analogue of analog H-sweep velocity modulation.

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