Hybrid echo canceller controllers

Details Hybrid echo canceller controllers Hybrid echo canceller controllers

2007-04-02

2011-12-20

Tsang, Fan (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406040, C379S406130, C379S406140

Reexamination Certificate

active

08081753

ABSTRACT:
Hybrid echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller can include a signal indicator and an echo canceller controller. The signal indicator can be configured to indicate periods of near-end signal and to indicate periods of echo only with echo-path change in the corrupted signal based at least in part on cross-correlation between two signals associated with the echo canceller. The echo canceller controller can be configured to control the echo canceller according to indications from the signal indicator.

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