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Error concealment apparatus for HDTV receivers

  • US 5,247,363 A
  • Filed: 03/02/1992
  • Issued: 09/21/1993
  • Est. Priority Date: 03/02/1992
  • Status: Expired due to Term
First Claim
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1. Adaptive error concealment apparatus, for concealing errors in video signal decoded as blocks of pixels, comprising:

  • a source of video signal occurring in blocks of coded data representing respective image areas, each area being represented by a plurality of pixels;

    means coupled to said source for detecting errors in said blocks of coded data, generating error tokens indicating blocks of coded data containing errors, discarding blocks of coded data with errors, and passing error free blocks of coded data;

    means for decoding said error free blocks of coded data on a block-by block basis, and generating corresponding blocks of pixel values representing said image areas;

    means, responsive to said error tokens and pixel values, for generating a first indicia related to the amount of image detail in at least one block of pixel values adjacent to a discarded block of pixel values;

    means, responsive to said error tokens and pixel values, for generating a second indicia related to image movement in said at least one block of pixel values adjacent to said discarded block of pixel values, with respect to an image in a previously decoded frame;

    means for comparing said first and second indicia, and providing first and second types of pixel data for said discarded block of pixel values, if the amount of image detail is greater and lesser then said image movement respectively.

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