Patents by Inventor Imed Zitouni

Imed Zitouni 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).

  • Patent number: 7966173
    Abstract: A system and method for restoration of diacritics includes making classification decisions regarding an utterance in accordance with an aggregate of a plurality of information sources in a diacritization model for diacritic restoration. A best diacritic representation is determined for graphemes in the utterance based upon a best match with the diacritization model. A diacritically restored representation of the utterance is output.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: June 21, 2011
    Assignee: Nuance Communications, Inc.
    Inventors: Ossama S. Emam, Ruhi Sarikaya, Imed Zitouni
  • Patent number: 7701886
    Abstract: A method for performing packet loss concealment of lost packets in Voice over IP (Internet Protocol) speech transmission. Statistical n-gram models are initially created with use of a training speech corpus, and then, packets lost during transmission are advantageously replaced based on these models. In particular, the existence of statistical patterns in successive voice over IP (VoIP) packets is advantageously exploited by first using conventional vector quantization (VQ) techniques to quantize the parameter data for each packet with use of a corresponding VQ index, and then determining statistical correlations between consecutive sequences of such VQ indices representative of the corresponding sequences of n packets. The statistic n-gram predictive models so created are then used to predict parameter data for use in representing lost data packets.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: April 20, 2010
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Minkyu Lee, Qiru Zhou, Imed Zitouni
  • Publication number: 20090299925
    Abstract: An exemplary processor-implemented method of determining whether a user of an online communication resource is an undesirable user includes the steps of building at least one model based on at least one feature of a feature set using at least one machine learning technique; and classifying the user by comparing at least one feature of the feature set that is associated with the user to the at least one model, a determination as to whether the user is an undesirable user being based at least in part on the classification of the user.
    Type: Application
    Filed: May 30, 2008
    Publication date: December 3, 2009
    Inventors: Ganesh N. Ramaswamy, Imed Zitouni
  • Publication number: 20080319735
    Abstract: Systems and methods are provided for automated semantic role labeling for languages having complex morphology. In one aspect, a method for processing natural language text includes receiving as input a natural language text sentence comprising a sequence of white-space delimited words including inflicted words that are formed of morphemes including a stem and one or more affixes, identifying a target verb as a stem of an inflicted word in the text sentence, grouping morphemes from one or more inflicted words with the same syntactic role into constituents, and predicting a semantic role of a constituent for the target verb.
    Type: Application
    Filed: June 22, 2007
    Publication date: December 25, 2008
    Inventors: Nandakishore Kambhatla, Imed Zitouni
  • Publication number: 20080270115
    Abstract: A system and method for restoration of diacritics includes making classification decisions regarding an utterance in accordance with an aggregate of a plurality of information sources in a diacritization model for diacritic restoration. A best diacritic representation is determined for graphemes in the utterance based upon a best match with the diacritization model. A diacritically restored representation of the utterance is output.
    Type: Application
    Filed: June 3, 2008
    Publication date: October 30, 2008
    Inventors: Ossama S. Emam, Ruhi Sarikaya, Imed Zitouni
  • Publication number: 20070225977
    Abstract: A system and method for restoration of diacritics includes making classification decisions regarding an utterance in accordance with an aggregate of a plurality of information sources in a diacritization model for diacritic restoration. A best diacritic representation is determined for graphemes in the utterance based upon a best match with the diacritization model. A diacritically restored representation of the utterance is output.
    Type: Application
    Filed: March 22, 2006
    Publication date: September 27, 2007
    Inventors: Ossama Emam, Ruhi Sarikaya, Imed Zitouni
  • Publication number: 20050276235
    Abstract: A method for performing packet loss concealment of lost packets in Voice over IP (Internet Protocol) speech transmission. Statistical n-gram models are initially created with use of a training speech corpus, and then, packets lost during transmission are advantageously replaced based on these models. In particular, the existence of statistical patterns in successive voice over IP (VoIP) packets is advantageously exploited by first using conventional vector quantization (VQ) techniques to quantize the parameter data for each packet with use of a corresponding VQ index, and then determining statistical correlations between consecutive sequences of such VQ indices representative of the corresponding sequences of n packets. The statistic n-gram predictive models so created are then used to predict parameter data for use in representing lost data packets.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 15, 2005
    Inventors: Minkyu Lee, Qiru Zhou, Imed Zitouni