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DIGITAL SCAN CONVERTER

  • US 3,810,174 A
  • Filed: 11/28/1969
  • Issued: 05/07/1974
  • Est. Priority Date: 11/28/1969
  • Status: Expired due to Term
First Claim
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1. A digital scan converter comprising:

  • sensing means for producing discrete video signals as a field of view is cyclically scanned in a predetermined pattern of successive lines at one particular rate;

    means for converting said video signals into elements of digital data, each element consisting of a binary number of k digits representative of the amplitude of a video signal where k is a constant integer;

    buffer storage means for receiving said elements of digital data and for storing a block therein said elements of digital data pertaining to a given line as a binary number;

    bulk storage means for receiving, from said buffer storage means in block form, said elements of digital data pertaining to said given line and for storing said data in a memory block preassigned to data pertaining to said gIven line;

    means for reading out data from said bulk storage means in a predetermined order bearing some relation to the order in which associated lines of said field are scanned for repeated display of all lines of said pattern at a rate which differs from said one particular rate;

    display means having an electron beam and a display surface responsive to said reading means for displaying said data by intensity modulating said beam in a frame with lines of displayed data spacially arranged relative to each other in the same sequence as scanned in said field;

    temporary means adapted to receive from said converting means said binary numbers and to store said binary numbers in proper sequence as microwords until transferred therefrom; and

    means for transferring said microwords to said block of said buffer storage means in groups, each group comprising a word, and said block consists of n words where n is a constant integer, and the product of the integers k and n is equal to the number of elements of digital data pertaining to a given line.

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