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Encoding and decoding apparatus and method with hamming weight enhancement

  • US 7,783,937 B1
  • Filed: 11/30/2006
  • Issued: 08/24/2010
  • Est. Priority Date: 03/07/2001
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • obtaining a sequence of binary digits including a first group of binary digits and a second group of binary digits, wherein the first group of binary digits collectively has a characteristic Hamming weight;

    inverting each of the binary digits in the first group of binary digits if the Hamming weight of the first group of binary digits is below a predetermined threshold Hamming weight value;

    providing an indication of whether the binary digits in the first group of binary digits have been inverted;

    performing run length limited (RLL) encoding on only the second group of binary digits; and

    transmitting the sequence of binary digits and the indication.

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