Patents by Inventor P. S. Gopalakrishnan

P. S. Gopalakrishnan 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).

  • Labelling speech using context-dependent acoustic prototypes
    Patent number: 5455889
    Abstract: The present invention relates to labelling of speech in a context-dependent speech recognition system. When labelling speech using context-dependent prototypes the phone context of a frame of speech needs to be aligned with the appropriate acoustic parameter vector. Since aligning a large amount of data is difficult if based upon arc ranks, the present invention aligns the data using context-independent acoustic prototypes. The phonetic context of each phone of the data is known. Therefore after the alignment step the acoustic parameter vectors are tagged with a corresponding phonetic context. Context-dependent prototype vectors exists for each label. For all labels the context-dependent prototype vectors having the same phonetic context as the tagged acoustic parameter vector are determined.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: October 3, 1995
    Assignee: International Business Machines Corporation
    Inventors: Lalit R. Bahl, Peter de Souza, P. S. Gopalakrishnan, Michael A. Picheny