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Programmable logic device for real time video processing

  • US 5,857,109 A
  • Filed: 04/11/1995
  • Issued: 01/05/1999
  • Est. Priority Date: 11/05/1992
  • Status: Expired due to Term
First Claim
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1. A real time video processing system comprisinga video input/output bus,a crossbar switch connected to said video input/output bus,a digital to analog converter (DAC) having a DAC input and a DAC output, the DAC input connected to said crossbar switch to receive a first or a second switchable, real time digital video signal and the DAC output providing a real time analog video signal,a first frame buffer having a first input and a first output, said first input and said output being connected to said crossbar switch and connectable therethrough to said video input/output bus,a second frame buffer having a second input and a second output, said second input and said output being connected to said crossbar switch and connectable therethrough to said video input/output bus,a host computer input/output bus,a first programmable logic device (PLD) having a first host input, a first switch input and a first PLD output,said first host input connected to said host computer input/output bus andsaid first switch input connected to said crossbar switch and connectable therethrough to said video input/output bus, said first frame buffer and said second frame buffer,said first PLD output connected to said crossbar switch and connectable therethrough to said first frame buffer and said second frame buffer and to said DAC input to provide a first switchable, real time digital video signal to said DAC input,a second programmable logic device (PLD) having a second host input, a second switch input and a second PLD output,said second host input connected to said host computer input/output bus,said second switch input connected to said crossbar switch and connectable therethrough to said video input/output bus, said first frame buffer and said second frame buffer,said second PLD output connected to said crossbar switch and connectable therethrough to said first frame buffer and said second frame buffer and to said DAC input to provide a second switchable, real time digital video signal to said DAC input.

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