Echo cancellation in the network for data applications

Details Echo cancellation in the network for data applications Echo cancellation in the network for data applications

H - Electricity

04

B

H04B 3/20 (2006.01) H04B 3/23 (2006.01)

Patent

CA 2250641

A network-based CODEC (coder-decoder) includes an echo canceler. This CODEC recognizes the presence of a data call by detecting predefined signaling portions of a modem handshaking process. For each detected data call, the CODEC uses a stored channel model for performing echo cancellation during the data call. The CODEC trains off-line during selected segments of the modem call and then stores the new channel model for use in a future data call.

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