High-resolution digital generator of graphic symbols with...

Details High-resolution digital generator of graphic symbols with... High-resolution digital generator of graphic symbols with...

G - Physics

06

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375/18, 350/3

G06F 3/14 (2006.01) G09G 3/00 (2006.01) G09G 5/24 (2006.01)

Patent

CA 1056967

HIGH-RESOLUTION DIGITAL GENERATOR OF GRAPHIC SYMBOLS WITH EDGING Abstract of the Disclosure A graphic symbol, completely digital, video signal generator, suitable for use in a television broad- cast display control system, derives high resolution (50 nanosecond video dot period) symbols with edging employing off-the-shelf low resolution (200 nanosecond period) shift registers. This is accomplished by employing four different phase clocks each having a low repetition rate (5 MHz). Separate independent edge key and monochrome video signals are derived as the symbol video output of the generator. -1-

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