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Inverse modeller

  • US 5,881,301 A
  • Filed: 10/02/1997
  • Issued: 03/09/1999
  • Est. Priority Date: 06/30/1992
  • Status: Expired due to Term
First Claim
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1. In a system having a data stream including run level code, the improvement characterized by:

  • a token formatter, accepting from the data stream first type tokens having a first predetermined width, and at least one of the following formats;

    Format A--ExxxxxxLLLLLLLLLLLFormat B--ERRRRRRLLLLLLLLLLLFormat C--E000000LLLLLLLLLLLwhere E=extension bit;

    F=specifics format;

    R=run bit;

    L=length bit or non-data token;

    x="don'"'"'t care" bit, said token formatter operating on said tokens by;

    splitting format A tokens into a format 0a token having a form of ELLLLLLLLLLL;

    splitting format B tokens into a format 1 token having the form of FRRRRRR00000 and a format 0a data token;

    splitting format C tokens into a format 0 token having the form of FLLLLLLLLLLL; and

    packing format 0, format 0a and format 1 tokens into a buffer, said buffer having a second predetermined width; and

    inverse modeller means active upon said tokens in said buffer for expanding out said run level code to a run of zero data followed by a level, whereby each token is expressed with a specified number of values.

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