Patents by Inventor Wouter Dehandschutter

Wouter Dehandschutter 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).

  • Noise-level adaptive residual echo suppressor
    Patent number: 6959167
    Abstract: An improved echo control system has an adaptive controlled echo canceling filter arrangement in which a background filter updates the filter coefficients of an echo shaping filter responsive to a normalized least mean square (NLMS) algorithm. An adaptive control module determines a weighted reference signal for the background filter in which the weight is proportional to a far signal reference and an estimate of the norm of an echo canceller error vector, and inversely proportional to en estimate of a residue of the echo canceller. And a non-linear normalized convergence term is used in the NLMS algorithm.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: October 25, 2005
    Assignee: ScanSoft, Inc.
    Inventor: Wouter Dehandschutter