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Language recognition using sequence frequency

  • US 6,882,970 B1
  • Filed: 10/25/2000
  • Issued: 04/19/2005
  • Est. Priority Date: 10/28/1999
  • Status: Expired due to Fees
First Claim
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1. A comparison apparatus comprising:

  • a receiver operable to receive first and second sequences of labels;

    an identifier operable to identify a plurality of different first sub-sequences of labels within said first sequence of labels;

    a first determiner operable to determine and to output the number of times each of said different first sub-sequences occurs within said first sequence of labels;

    a definer operable to define a plurality of second sub-sequences of labels from said second sequence of labels;

    a second determiner operable to determine and to output the number of times each of said different first sub-sequences occurs within said second sequence of labels by comparing each first sub-sequence of labels with each second sub-sequence of labels; and

    a similarity measure calculator operable to calculate a measure of the similarity between the first and second sequences of labels by comparing the numbers output from said first determiner with the numbers output from said second determiner;

    wherein said second determiner comprises;

    a comparator operable to compare a current first sub-sequence of labels with each second sub-sequence of labels using predetermined data including confusion information which defines confusability between different labels, to provide a set of sub-sequence similarity measures; and

    a counter operable to count the number of times the current first sub-sequence of labels occurs within the second sequence of labels in dependence upon the set of sub-sequence similarity measures provided by said comparator for the current first sub-sequence of labels.

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