Patents Examined by Richemond Dorvi
  • Efficient pitch estimation method
    Patent number: 5946650
    Abstract: A method and means to estimate the pitch of a speech or acoustic signal within a vocoder begins with the center clipping and low-pass filtering of the speech or acoustic signal to eliminate the formants from the speech or acoustic signal. An error function for each pitch is calculated for each pitch within the speech or acoustic signal. A fast tracking method is used to select the estimated pitch for the pitch or acoustic signal. A final check for the doubling of the pitch will minimize any incorrect estimation of the pitch.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: August 31, 1999
    Assignee: Tritech Microelectronics, Ltd.
    Inventor: Ma Wei