Video enhancement component
OwnerH. George Piresinventor
Life of this patent
Estimating the term…
Abstract
A system for enhancing the clarity of video images by changing the pulse response characteristics. A correcting signal that is proportional to the slope of the rise time is generated, processed and then added to the original signal. The combined signal is then monitored with a device that has the ability to check for the presence of overshoots on fast rise time high amplitude signals. When such overshoots are detected, the system switches to a component of the signal which has no overshoot for the duration in time that the overshoot exists, thereby greatly diminishing or eliminating the overshoots.
Claims20
A video enhancement component for enhancing a video signal, which comprises:
- (a.) a slope detector means for generating a slope detected signal, the amplitude of which is dependent on the change in amplitude of an input video signal;
- (b.) means for setting a first threshold level, being a high threshold level, for said slope detected signal;
- (c.) means for setting a second threshold level, being a low threshold level, for said slope detected signal;
- (d.) threshold change switching means connected to said first and said second threshold setting means;
- (e.) slope comparator means for comparing said slope detected signal with said threshold change switching means;
- (f.) slope change switching means to switch between said slope detected signal and a lower level signal to generate a second signal;
- and,
- (g.) means for combining said second signal from the slope change switching means with said input video signal.
A video enhancement component for enhancing a video signal, which comprises:
- (a.) a slope detector means for generating a slope detected signal from an original input video signal;
- (b.) means for setting a first threshold level, being a high threshold level, for said slope detected signal;
- (c.) means for setting a second lower threshold level, being a low threshold level, for said slope detected signal;
- (d.) threshold change switching means connected to said first and said second threshold setting means;
- (e.) slope comparator means for comparing said slope detected signal with said threshold change switching means to create a first activated output;
- (f.) means for combining said slope detected signal with the original input video signal to form a combined video signal;
- (g.) overshoot comparator means for comparing the combined second video signal and said original input video signal to create a second activated output;
- (h.) output control switch means for switching between said combined video signal and said original input video signal, and;
- (i.) controlling means to activate said output control switch means only when said slope comparator and said overshoot comparator generate said first activated output and said second activated output.
A component of enhancing a video signal comprising:
- a delay means for creating a delayed video signal, a slope detector means for generating a slope detected signal from the delayed video signal, means for setting a first threshold level, means for setting a second lower threshold level, first switching means connected to first and second threshold setting means, slope comparator means for comparing the slope detected signal with the first switch means to create an activated output, second switching means to switch between said slope detected signal and a constant low level signal, means for combining the signal from the second switching means with the originating video signal to form a combined video signal, overshoot comparator means for comparing the combined video signal and the undelayed video signal to create an activated output, third switch means for switching between the combined video signal and the undelayed video signal and controlling means to activate the third switch means only when first and second comparators are activated.
Dependencies are inferred from the claim text.