Apparatus and method for echo control

Telephonic communications – Echo cancellation or suppression – Using digital signal processing

Reexamination Certificate

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C379S406030, C379S406010

Reexamination Certificate

active

07027593

ABSTRACT:
Determining the time delay between a transmitted signal and an echo. Then, the echo canceller is adjusted by the delay amount so that the echo canceller tail length is relatively short.

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