Patent ID: 7023986
Filing Date: 2006-04-04
Classification: H04M

Abstract:
1. A terminal for processing an echo, the terminal being part of a communication system, the terminal comprising: a first transducer for receiving a signal, the signal including a part due to activity of a distant user; a second transducer for emitting a second signal, the second signal including (a) a useful part due to activity of a local user, (b) a background noise part, and (c) an echo part due to coupling between said first and second transducers; an adaptive echo cancellation device adapted to (a) calculate, from the first signal received by said first transducer, an estimate of the echo part of the second signal emitted by said second transducer, and (b) subtract the estimate of the second signal emitted by said second transducer to produce an output signal from the echo cancellation device; a device for processing the residual echo at the output of said adaptive echo cancellation device, said residual echo processing device comprising: