Methods and apparatus for echo cancellation using an...

Details Methods and apparatus for echo cancellation using an... Methods and apparatus for echo cancellation using an...

2006-05-23

2006-05-23

Tran, Sinh (Department: 2646)

X-ray or gamma ray systems or devices

Photographic detector support

Dental

C379S406010, C379S406020, C379S406030, C379S406050

Reexamination Certificate

active

07050545

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.

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Prentice Hall, Simon Haykin, “Adaptive Filter Theory”, pp. 536-543, Upper Saddle River, New Jersey, published Sep. 14, 2001.

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