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Data transmission system

  • US 4,910,750 A
  • Filed: 12/08/1988
  • Issued: 03/20/1990
  • Est. Priority Date: 12/05/1985
  • Status: Expired due to Fees
First Claim
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1. A data transmission system, which includes:

  • an input over which data expressed in binary format is received, which data is to be converted prior to transmission into a ternary format;

    means to subdivide the binary data into groups of elements each consisting of m binary elements, where m is a first integer;

    conversion means to which the groups of m binary elements are applied successively to be converted back into a group of n ternary elements, where n is a second integer and is less than m, so that the number of ternary elements which is transmitted is less than the number of binary elements in the confined data, and where the number of different available ternary groups is greater than 2m and more than 2m of those groups are used in the data transmission;

    a comparator which compares each said ternary group with its immediately preceding ternary group and causes the process of conversion to be modified, using more than 2m of the available groups of ternary elements such that in the data as transmitted in the ternary format two consecutive and identical ternary groups do not occur; and

    an output over which the ternary groups generated in response to the reception of binary data over said input are transmitted.

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