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Method and apparatus for echo suppression

  • US 6,714,646 B1
  • Filed: 02/29/2000
  • Issued: 03/30/2004
  • Est. Priority Date: 09/01/1997
  • Status: Expired due to Term
First Claim
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1. A method for suppressing echo in a telephone connection, a first part of said connection being connected through an analogue network and a second part of the connection being connected through a digital network, characterized by the steps of transmitting all sound from the digital network to the analogue network, determining a first value for the energy level of the signal from the analogue network to the digital network, determining a second value for the energy level of the signal from the digital to the analogue network;

  • transmitting sound from the analogue network to the digital network in dependence of the result of a comparison between said first and second values.

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