Abstract: The digital data packets received contain data describing successive time segments of a signal stream to be restored, for example audio. Elements obtained from the packets received are recorded in a buffer memory organized in first-in first-out mode. A burst of packets fulfilling a certain burst size condition is detected a priori, on the basis of a reception delay evaluated in response to the reception of a first packet of the burst. The content of the buffer memory is controlled by accounting for the detection of the burst fulfilling the size condition.

Abstract: A terminal in a communication system includes emitting and receiving transducers and an echo processor having an adaptive echo canceler that processes a residual echo output from the adaptive echo canceler.

Abstract: The device receives an input signal xt and an observation signal yt, one component of which is the response of a system to the input signal. It determines an error signal et at an instant t in accordance with the equation et=yt?XtTHt?1, where Ht?1 is a vector made up of L coefficients of an identification filter having a finite impulse response representative of the impulse response of the system and XtT=(xt, xt?1, . . . , xt?L+1). A predictive analysis of the input signal is performed by a computation applied to frames of the input signal. The L coefficients of the identification filter are adapted by adding to the vector Ht?1 a vector proportional to e t X t T ? U t + ? ? U t , where Ut is a vector made up of the L values of a prediction residue of the input signal at the instant t and at the preceding L?1 instants, and ? is a positive or zero coefficient.

Abstract: The digital data packets received contain data describing successive time segments of a signal stream to be restored, for example audio. Elements obtained from the packets received are recorded in a buffer memory organized in first-in first-out mode. A burst of packets fulfilling a certain burst size condition is detected a priori, on the basis of a reception delay evaluated in response to the reception of a first packet of the burst. The content of the buffer memory is controlled by accounting for the detection of the burst fulfilling the size condition.

Abstract: The present invention concerns a device for processing the echo in a communication system at a terminal comprising a first transducer (4) and a second transducer (5), the said echo processing device (1, 101, 201) for its part comprising an adaptive echo cancellation device (3, 103, 203).