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Speech representation by feature-based word prototypes comprising phoneme targets having reliable high similarity

  • US 5,684,925 A
  • Filed: 09/08/1995
  • Issued: 11/04/1997
  • Est. Priority Date: 09/08/1995
  • Status: Expired due to Fees
First Claim
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1. A method of electronically representing a given spoken word or phrase as a digital prototype comprising:

  • providing phoneme templates representing a database of standard speech;

    for a first training instance of said given word or phrase, comparing the first training instance with said phoneme templates to produce first phoneme similarity data as a function of time;

    processing said first phoneme similarity data to extract first training instance features that exceed a predetermined similarity threshold;

    for at second training instance of said given word or phrase, comparing the second training instance with said phoneme templates to produce second phoneme similarity data as a function of time;

    processing said second phoneme similarity data to extract second training instance features that exceed a predetermined similarity threshold;

    aligning the extracted first and second training instance features and selecting those features that achieve a predetermined degree of correlation between first and second training instances to produce time-dependent speaker-independent phoneme similarity data;

    building word prototype targets corresponding to the time-dependent speaker-independent phoneme similarity data, the word prototype targets each including a phoneme symbol and at least one datum indicative of a phoneme similarity score;

    using said phoneme symbol and said phoneme similarity score as a digital prototype to electronically represent the given speech utterance.

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