Patents Assigned to Adaptive Digital Technologies
  • Echo canceller
    Patent number: 6766021
    Abstract: A method of echo cancellation for a signal transmission system in which the size of the step used to adapt filter coefficients is adjusted in accordance with the echo delay and in which stationary signals are avoided by determining when the mean and variance of coefficients obtained from a second order linear predictive coding analysis of successive far end samples exceed preset thresholds.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: July 20, 2004
    Assignee: Adaptive Digital Technologies
    Inventors: Scott David Kurtz, Brian Michael McCarthy, Sr.