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Voice gateway with echo cancellation

  • US 6,912,209 B1
  • Filed: 11/03/2000
  • Issued: 06/28/2005
  • Est. Priority Date: 04/13/1999
  • Status: Expired due to Term
First Claim
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1. A method of conditioning a composite signal, the composite signal being formed by introducing a first signal into a second signal, comprising:

  • adaptively filtering the first signal;

    detecting the second signal in the composite signal;

    controlling filter adaptation of the first signal as a function of the second signal detection; and

    recovering the second signal from the composite signal using the adaptively filtered first signal, wherein filter adaptation of the first signal is capable of being disabled, before the second signal is recovered from the composite signal.

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