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Temporal-spatial error concealment apparatus and method for video signal processors

  • US 5,621,467 A
  • Filed: 02/16/1995
  • Issued: 04/15/1997
  • Est. Priority Date: 02/16/1995
  • Status: Expired due to Fees
First Claim
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1. Apparatus for generating substitute blocks of pixel data for missing or corrupted blocks of pixel data, comprising:

  • a source of pixel data representing respective images and a source of error data indicating blocks of said pixel data that may be missing or corrupted (hereinafter designated bad pixel data);

    a controller, responsive to said error data, for accessing from said source, pixel data located spatially adjacent to a block of bad pixel data, and a temporally predicted block of data corresponding to said block of bad pixel data;

    an interpolator operative upon said pixel data located spatially adjacent to a block of bad pixel data, for generating a spatially interpolated block of pixel data;

    transform circuitry for providing a matrix of transform coefficients representing said spatially interpolated block of pixel data, and for generating a further matrix of transform coefficients representing said temporally predicted block of data;

    a selector, responsive to a predetermined criteria, for forming a still further matrix of transform coefficients, by selecting respective coefficients in said still further matrix exclusively from said matrix of transform coefficients representing said spatially interpolated block, or from said further matrix of transform coefficients in accordance with said criteria; and

    inverse transform circuitry for inverse transforming said still further matrix to generate said substitute block of pixel data.

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