Patents by Inventor Thomas P. Barnwell

Thomas P. Barnwell 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).

  • Apparatus and quality enhancement algorithm for mixed excitation linear predictive (MELP) and other speech coders
    Patent number: 6453287
    Abstract: A system and method for enhancing the speech quality of the mixed excitation linear predictive (MELP) coder and other low bit-rate speech coders. The system and method employ a plosive analysis/synthesis method, which detects the frame containing a plosive signal, applies a simple model to synthesize the plosive signal, and adds the synthesized plosive to the coded speech. The system and method remains compatible with the existing MELP coder bit stream.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: September 17, 2002
    Assignee: Georgia-Tech Research Corporation
    Inventors: Takahiro Unno, Thomas P. Barnwell, III, Kwan K. Truong
  • Apparatus and quality enhancement algorithm for mixed excitation linear predictive (MELP) and other speech coders
    Publication number: 20020052734
    Abstract: A system and method for enhancing the speech quality of the mixed-excitation linear predictive (MELP) coder and other low bit-rate speech coders are disclosed. The system includes a robust pitch-detection algorithm, which adjusts or slides a pitch-analysis window to provide the speech coder with more reliable pitch information. In addition, the system is shown to be compatible with the existing MELP coder in terms of the bit stream.
    Type: Application
    Filed: November 16, 2001
    Publication date: May 2, 2002
    Inventors: Takahiro Unno, Thomas P. Barnwell, Kwan K. Truong