Method and apparatus for implementing maximum transition run codes

DC CAFC
  • US 5,859,601 A
  • Filed: 10/15/1996
  • Issued: 01/12/1999
  • Est. Priority Date: 04/05/1996
  • Status: Expired due to Term
First Claim
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1. Apparatus for encoding m-bit binary datawords into n-bit binary codewords, in a recorded waveform, where m and n are preselected positive integers such that n is greater than m, comprising:

  • receiver means for receiving the dataword;

    encoder means coupled to the receiver means, for producing sequences of fixed length codewords;

    means for imposing a pair of constraints (j;

    k) on the encoded waveform wherein the j constraint is defined as the maximum number of consecutive transitions allowed on consecutive clock periods in the encoded waveform to facilitate the reduction of a probability of a detection error in said receiver means;

    said sequences generating no more than j consecutive transitions in the recorded waveform such that j is an integer equal to or greater than 2; and

    said sequences generating no more than k consecutive sample periods without a transition in the recorded waveform.

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