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System and method for processing image signals

  • US 4,658,300 A
  • Filed: 03/05/1984
  • Issued: 04/14/1987
  • Est. Priority Date: 03/08/1983
  • Status: Expired due to Term
First Claim
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1. Video signal processing method of fetching pixel signals by sampling an input video signal comprising a plurality of horizontal scanning lines, said method comprising the steps of:

  • setting the ratio represented by the rate of the number of vertical pixels to be obtained in the vertical direction to the number of horizontal scanning lines;

    obtaining pixel signals indicative of said vertical pixels in the vertical direction by interpolation on the basis of pixel signals sampled from a plurality of adjacent horizontal scanning lines; and

    sampling the input video signal in the horizontal direction at a horizontal sampling frequency determined by said ratio, wherein the sampling of one line in the vertical direction is performed in one vertical interval of the video signal and the horizontal position of one line in the vertical direction to be sampled changes at every vertical retracing interval of the video signal.

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