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Method and apparatus for training a multilingual speech model set

  • US 6,912,499 B1
  • Filed: 08/31/1999
  • Issued: 06/28/2005
  • Est. Priority Date: 08/31/1999
  • Status: Expired due to Fees
First Claim
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1. A method for generating a multilingual speech model set, said multilingual speech model set being suitable for use in a multilingual speech recognition system, said method comprising:

  • a) providing a group of acoustic sub-word units comprising;

    a first subgroup of acoustic sub-word units associated to a first language with each acoustic sub-word unit associated in said first subgroup having an associated speech model;

    a second subgroup of acoustic sub-word units associated to a second language;

    said first subgroup and said second subgroup sharing at least one common acoustic sub-word unit;

    b) providing a training set comprising a plurality of entries, each entry having a speech token representative of a word and a label being an orthographic representation of the word;

    c) providing a set of untrained speech models, said set of untrained speech models having at least a first untrained speech model, further comprising, (i) providing said first untrained speech model by initializing at least one acoustic sub-word unit of said second subgroup with said associated speech model of at least one acoustic sub-word unit of said first subgroup that is acoustically similar to said at least one acoustic sub-word unit of said second subgroup;

    d) training the set of untrained speech models by utilizing said training set, a plurality of letter to acoustic sub-word unit rules sets and said group of acoustic sub-word units to derive the multilingual speech model set, each letter to acoustic sub-word unit rules set being associated to a different language.

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