Adaptive comb filtering system for processing video signals

  • US 4,803,547 A
  • Filed: 04/10/1987
  • Issued: 02/07/1989
  • Est. Priority Date: 04/10/1987
  • Status: Expired due to Term
First Claim
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1. An adaptive comb filtering system for use in separating luminance and chrominance components of a composite video signal which includes a plurality of successive scan lines comprising:

  • means for receiving said composite video signal and separating said video signal into a middle (M) scan line component and vertically adjacent top (T) and bottom (B) scan line components;

    means responsive to said middle, top and bottom scan line components for deriving a combed chroma signal therefrom;

    means for deriving from one of said scan line components an uncombed chroma signal; and

    signal selection control means for selecting as a chrominance output signal either said combed chroma signal or said uncombed chroma signal in dependence upon the relative relationship of any vertical transition of two of said scan line components to any horizontal transition of one of said scan line components.

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