Abstract: A non-linear processor for managing a speech signal is disclosed. The non-linear processor includes an adaptive lattice filter that generates a prediction error from a residual echo of the speech signal, a signum non-linearity unit that generates an excitation component from the prediction error, an excitation signal mixer that generates an excitation signal from the excitation component and a noise component, an inverse lattice filter that generates a modified residual echo from the excitation signal, and a gain adjuster that adjusts a power of the modified residual echo.
Type:
Grant
Filed:
April 11, 2002
Date of Patent:
May 23, 2006
Assignee:
Tallabs Operations, Inc.
Inventors:
Oguz Tanrikulu, John O. DellaMorte, Jr.