Patents by Inventor Konstantinos Koumpis

Konstantinos Koumpis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Speech recognition method and system
    Patent number: 7319960
    Abstract: A speech recognition system uses a phoneme counter to determine the length of a word to be recognized. The result is used to split a lexicon into one or more sub-lexicons containing only words which have the same or similar length to that of the word to be recognized, so restricting the search space significantly. In another aspect, a phoneme counter is used to estimate the number of phonemes in a word so that a transition bias can be calculated. This bias is applied to the transition probabilities between phoneme models in an HNN based recognizer to improve recognition performance for relatively short or long words.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: January 15, 2008
    Assignee: Nokia Corporation
    Inventors: Soren Riis, Konstantinos Koumpis
  • Speech recognition method and system
    Publication number: 20020165715
    Abstract: A speech recognition system uses a phoneme counter to determine the length of a word to be recognized. The result is used to split a lexicon into one or more sub-lexicons containing only words which have the same or similar length to that of the word to be recognized, so restricting the search space significantly. In another aspect, a phoneme counter is used to estimate the number of phonemes in a word so that a transition bias can be calculated. This bias is applied to the transition probabilities between phoneme models in an HNN based recognizer to improve recognition performance for relatively short or long words.
    Type: Application
    Filed: December 19, 2001
    Publication date: November 7, 2002
    Inventors: Soren Riis, Konstantinos Koumpis