PROCEDE ET DISPOSITIF D'ANNULATION D'ECHO ACOUSTIQUE PAR TATOUAGE AUDIO

A method of cancelling acoustic echo in a first signal comprising an echo signal of a second signal, comprising: inserting, in an inaudible manner, into the second signal a pseudo-random sequence whose circular autocorrelation comprises a unit impulse and a continuous component; characterizing, in t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TURKI MONIA, MAHE GAEL, JAIDANE MERIEM, DJAZIRI LARBI SONIA, MEZGHANI-MARRAKCHI IMEN
Format:	Patent
Sprache:	fre
Schlagworte:	ACOUSTICS CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY MUSICAL INSTRUMENTS PHYSICS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION TELEPHONIC COMMUNICATION
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Beschreibung
Zusammenfassung:	A method of cancelling acoustic echo in a first signal comprising an echo signal of a second signal, comprising: inserting, in an inaudible manner, into the second signal a pseudo-random sequence whose circular autocorrelation comprises a unit impulse and a continuous component; characterizing, in the first signal, by means of the inserted sequence, an acoustic channel followed by the echo signal; estimating the echo signal in the first signal by means of the characterization of the acoustic channel; and cancelling the echo signal by means of the obtained estimation.