Method for synthesizing an echo path in an echo canceller

Details Method for synthesizing an echo path in an echo canceller Method for synthesizing an echo path in an echo canceller

1995-09-15

1997-07-15

Zele, Krista M.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379406, 379411, 370286, 370291, H04B 323

Patent

active

056490127

ABSTRACT:
A method of synthesizing an echo path in an echo canceller is provided. The method includes the steps of obtaining near end and far end signal samples at an echo canceller, locating the echo in a background task using a whitened version of the signal, transferring the echo location information to a foreground task, and eliminating the echo in the incoming signals by filtering the signal in the location passed to the foreground task by the background task.

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Chang et al., "A DSP-Based Echo-Canceller with Two Adaptive Filters", IEEE Globecom 1986, vol. 3, pp. 46.8.1-46.8.5 Dec. 1986.
Madisetti et al., "Dynamically-Reduced Complexity Implementation of Echo Cancelers", ICASSP 1986, vol. 2/4, pp. 26.4.1-26.4.4 Apr. 1986.

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