System for the digital processing of an acoustic or electrical signal, and telephone set provided with such a processing system
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United States of America Patent
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Issued Date -
Sep 14, 2006
app pub date -
Apr 27, 2004
filing date -
Jun 24, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The system for digitally processing an acoustic signal is arranged in a telephone set provided with a loudspeaker and a microphone, between the loudspeaker and the microphone. The system has an automatic gain control circuit associated with an echo cancellation device. It also comprises calculation means which are configured to apply a transfer function of the automatic gain control means to the echo cancellation device input, so that the signal from the microphone and the signal for the loudspeaker are each manipulated by a function comprising the same term, corresponding to the transfer function of the automatic gain control means.
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