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Tree structured cohort selection for speaker recognition system

  • US 6,006,184 A
  • Filed: 01/28/1998
  • Issued: 12/21/1999
  • Est. Priority Date: 01/28/1997
  • Status: Expired due to Fees
First Claim
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1. A speaker recognition system comprising:

  • a tree-structured reference pattern storing unit having first through M-th node stages with the first node stage having one node and with each of the second through M-th node stages having a plurality of nodes, each of said nodes storing a reference pattern of an inhibiting speaker, each of said nodes of an (N)-th node stage being connected to predetermined ones of said nodes of said (N-1)-th node stage, said reference pattern of each of said nodes of said (N-1)-th node stage representing acoustic features in said reference patterns of the predetermined ones of said nodes of said N-th node stage, where M represents an integer greater than three and N represents an integer from one to M;

    an analysis unit for analyzing an input verification utterance and for converting said input verification utterance to feature vectors;

    a similarities calculating unit connected to said tree-structured reference pattern storing unit and to said analysis unit for calculating similarities between said feature vectors and said reference patterns of all of said inhibiting speakers; and

    an inhibiting speaker selecting unit connected to said similarities calculating unit for calculating said similarities to select a predetermined number of said inhibiting speakers.

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