Patents by Inventor Yeonsuk Cho

Yeonsuk Cho 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).

  • Systems and methods for evaluating difficulty of spoken text
    Patent number: 9449522
    Abstract: Systems and methods are provided for assigning a difficulty score to a speech sample. Speech recognition is performed on a digitized version of the speech sample using an acoustic model to generate word hypotheses for the speech sample. Time alignment is performed between the speech sample and the word hypotheses to associate the word hypotheses with corresponding sounds of the speech sample. A first difficulty measure is determined based on the word hypotheses, and a second difficulty measure is determined based on acoustic features of the speech sample. A difficulty score for the speech sample is generated based on the first difficulty measure and the second difficulty measure.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: September 20, 2016
    Assignee: Educational Testing Service
    Inventors: Su-Youn Yoon, Yeonsuk Cho, Klaus Zechner, Diane Napolitano
  • Systems and Methods for Evaluating Difficulty of Spoken Text
    Publication number: 20140141392
    Abstract: Systems and methods are provided for assigning a difficulty score to a speech sample. Speech recognition is performed on a digitized version of the speech sample using an acoustic model to generate word hypotheses for the speech sample. Time alignment is performed between the speech sample and the word hypotheses to associate the word hypotheses with corresponding sounds of the speech sample. A first difficulty measure is determined based on the word hypotheses, and a second difficulty measure is determined based on acoustic features of the speech sample. A difficulty score for the speech sample is generated based on the first difficulty measure and the second difficulty measure.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 22, 2014
    Applicant: Educational Testing Service
    Inventors: Su-Youn Yoon, Yeonsuk Cho, Klaus Zechner, Diane Napolitano