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Block mode digital signal conditioning method and apparatus

  • US 4,574,362 A
  • Filed: 04/12/1982
  • Issued: 03/04/1986
  • Est. Priority Date: 04/12/1982
  • Status: Expired due to Fees
First Claim
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1. A method of conditioning a digital data string for transmission between a first and a second digital unit on an asynchronous communication line, the method comprising the steps of:

  • a. determining a maximum number of bits per byte each of the first and second digital units can accept;

    b. serializing a plurality of data bytes to be transmitted from the first digital unit into a continuous string of data bits;

    c. prefixing a preselected header string to the data string to identify the transmission source;

    d. packing the serialized data string of step b. into pseudo-bytes each having a number of bits that is no longer than the smaller of the maximum numbers determined in step a.;

    e. appending a preselected control character string following the data string to identify the end of the packed data string; and

    f. arithmetically adding an offset value to each pseudo-byte, the value of which is dependent on and preselected for the length of the pseudo-bytes.

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