Color video synthesizer with improved image control means
First Claim
1. A system for generating a video display signal which represents a first signal modified as a function of a second separately derived image signal, comprising:
- a. a function generator for generating a predetermined video signal, and being controllable to an on or off operating condition;
b. an image signal generator for generating an image video signal;
c. control signal means for generating an on-off control signal from said image video signal; and
d. means for controlling the operation of said function generator with said control signal.
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Abstract
In a video synthesizer for generating programmable graphics, moving elements and the like, a subsystem for generating a video signal wherein a predetermined generated function is displayed in a selected manner as a function of a predetermined video signal. The video control signal, which suitably represents a graphic character or characters, and may be stationary or moving, is used for starting and stopping a function generator whereby a composite video signal is obtained. The video signal may be further processed by level assignment and color selection to produce the desired color video signal.
51 Citations
17 Claims
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1. A system for generating a video display signal which represents a first signal modified as a function of a second separately derived image signal, comprising:
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a. a function generator for generating a predetermined video signal, and being controllable to an on or off operating condition; b. an image signal generator for generating an image video signal; c. control signal means for generating an on-off control signal from said image video signal; and d. means for controlling the operation of said function generator with said control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for generating a video display signal, comprising:
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a. a function generator for generating a first video signal which represents a predetermined display pattern; b. image signal generator means for providing a digitized image signal in synchronization with said function generator signal; c. polarity select means for providing said digitized signal with a selected polarity; d. pulse generator means for deriving pulses as a predetermined function of said digital signal; and e. on-off generator means having an output connected to said function generator means and an input connected to the output of said pulse generator means, for generating a signal for controlling the on-off state of said function generator. - View Dependent Claims (11, 12, 13, 14)
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15. A method of generating a video display, comprising:
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a. generating, with an electronic function generator, a video signal carrying information corresponding to a predetermined video pattern; b. generating a digitized image video signal carrying information representing a control image; and c. controlling said function generator in an off and on state with said image signal. - View Dependent Claims (16, 17)
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Specification