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Video system for plotting and transmitting video traffic information

  • US 4,398,171 A
  • Filed: 02/23/1981
  • Issued: 08/09/1983
  • Est. Priority Date: 02/26/1980
  • Status: Expired due to Fees
First Claim
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1. System for video display by superposing, on the screen of a vehicle-based receiver'"'"'s image tube, a relatively high definition image defining a road map or a town plan selected from amongst a plurality of such map or plan images and a relatively low definition image defining indication signals to be represented on the map or the plan for information purposes, said system comprising:

  • means for radio transmitted a plurality of data items related to said low definition images, said data items including respective addresses;

    means for selectively receiving said data items having a given address;

    memorizing means for storing said data items having said given address;

    means for displaying said road map or town plan image on the said image tube screen; and

    ,means for scanning said memorizing means containing the data items at a predetermined frequency and for displaying the corresponding low definition image on the said screen.

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