METHOD AND DEVICE FOR CANCELLING ACOUSTIC ECHO BY AUDIO WATERMARKING

METHOD AND DEVICE FOR CANCELLING ACOUSTIC ECHO BY AUDIO WATERMARKING

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...

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Bibliographische Detailangaben
Hauptverfasser: JAIDANE, MERIEM, TURKI, MONIA, MAHE, GAEL, DJAZIRI LARBI, SONIA, MEZGHANI-MARRAKCHI, IMEN
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
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.