Echo reducing phone with state machine controlled switches

Details Echo reducing phone with state machine controlled switches Echo reducing phone with state machine controlled switches

H - Electricity

04

B

H04B 3/20 (2006.01) H04B 3/32 (2006.01) H04M 9/08 (2006.01)

Patent

CA 2283590

The purpose of the present invention is thus to reduce the echo introduced by cross-talk. The problem described above, with how to reduce the echo introduced by cross-talk is solved by to the microphone and to the speaker introduce switches controlled by a state-machine which take as input the signal energy of the signal from the microphone, a VAD flag of the signal from the microphone, the signal energy of the signal to the speaker and a VAD flag of the signal to the speaker.

Pour réduire l'écho introduit par diaphonie, l'invention propre d'introduire des interrupteurs dans le microphone et dans le haut-parleur, ces interrupteurs étant commandés par un automate fini qui prend comme entrée l'énergie du signal provenant du microphone, un drapeau DAV du signal provenant du microphone, l'énergie du signal envoyé au haut-parleur et un drapeau DAV du signal envoyé au haut-parleur.

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