Television – Special applications – Aid for the blind
Patent
1993-08-04
1994-12-20
Groody, James J.
Television
Special applications
Aid for the blind
348630, H04N 5208
Patent
active
053749642
ABSTRACT:
A circuit and method for shortening the transition time of sharp color transitions in color television signals. The invention includes a pattern recognition circuit and method which directly and efficiently recognizes color transitions within a predetermined range. The disclosed embodiment of the invention utilizes a filter to output its step response to the pattern recognition circuit which outputs a control signal whenever the color signal rise or fall time does not fit a predetermined pattern. When the pattern recognition circuit recognizes the step response, it directs a hold circuit to output a previous color signal for a predetermined time period before allowing the transition to proceed, thus shortening the transition time.
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Groody James J.
Matsushita Electric Corporation of America
Miller John W.
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