Patents by Inventor David John Pearce

David John Pearce 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 using unequally-weighted subvector error measures for determining a codebook vector index to represent plural speech parameters
    Patent number: 6389389
    Abstract: Quantization unit (108) comprises evaluator (120) and comparator (122) in signal processing for identifying an utterance in system (100). The evaluator (120) weights a first intermediate result of an operation on a first set of a plurality of speech parameters (104) differently than a second intermediate result of an operation on a second set of the plurality of speech parameters (104) in a weighted representation of the plurality of speech parameters (104). The comparator (122) employs the weighted representation of the plurality of speech parameters (104) to determine a vector index to represent the plurality of speech parameters (104). The quantization unit (108), in one example, can employ split vector quantization in conjunction with the weighted representation to determine a vector index to represent the plurality of speech parameters (104).
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: May 14, 2002
    Assignee: Motorola, Inc.
    Inventors: Jeffrey A. Meunier, William M. Kushner, David John Pearce