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METHOD AND APPARATUS FOR REPLACING A PORTION OF A FIRST DIGITAL SIGNAL WITH A SECOND DIGITAL SIGNAL

  • US 20070222652A1
  • Filed: 05/30/2007
  • Published: 09/27/2007
  • Est. Priority Date: 05/16/2005
  • Status: Active Grant
First Claim
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1. In a digital system utilizing differential encoding, a method for replacing at least one sample in a first digital signal with a new value, the method comprising:

  • applying a first difference correction at the location of the at least one sample, the first difference correction being of sufficient magnitude so that when applied at the location of the at least one sample, the resulting value, when limited to a valid range for samples in the digital signal, is an extremum value, regardless of the value of the at least one sample;

    limiting the result of the application of the first difference correction to a valid range for samples in the digital signal;

    computing a second difference correction, the second difference correction being computed from the difference between the new value and the extremum value; and

    applying the second difference correction at the location of the at least one sample.

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