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One-row keyboard and approximate typing

  • US 20080270897A1
  • Filed: 04/18/2008
  • Published: 10/30/2008
  • Est. Priority Date: 08/13/2004
  • Status: Active Grant
First Claim
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1. A method for predicting a character sequence based on a signature sequence of equal length to that of said character sequence, said signature sequence generated by a user'"'"'s consecutive selection of keys on a reduced keyboard, comprising:

  • (i) receiving a signature for each key selected by said user, each key-signature pair of said reduced keyboard being unique, each signature associated with at least one dual signature and at least one of said signatures associated with two or more dual signatures, each signature-dual signature pair uniquely associated with a character supported by said reduced keyboard;

    (ii) storing in a computer readable memory a plurality of objects, each of said objects comprising;

    (a) a unique sequence of signature-dual signature pairs derived from at least one set of legal beginning-of-word (BOW) character combinations; and

    (b) one or more attributes associated with said sequence;

    (iii) for each received signature, predicting at least one of said plurality of objects based on a sequence of said signatures, including said received signature, consecutively received from said reduced keyboard and on said object sequence attributes;

    each such sequence terminating with a signature predicted as a delimiter; and

    (iv) outputting a unique BOW character combination associated with said at least one predicted object.

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