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Method and apparatuses for removing blocking effect in a motion picture decoder

  • US 6,144,700 A
  • Filed: 05/14/1997
  • Issued: 11/07/2000
  • Est. Priority Date: 05/14/1996
  • Status: Expired due to Term
First Claim
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1. A method for removing blocking effect comprising the steps of:

  • a) extracting boundary pixel values of a current block and each adjacent block to said current block;

    b) extracting difference values between the boundary pixel values of said current block and the boundary pixel values of each said adjacent block, and calculating a mean value for the difference values;

    c) limiting the mean value within a range of -1/2 quantization step size to 1/2 quantization step size; and

    d) adding the limited mean value to each said pixel value of said current block, and outputting corrected images.

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