Dynamic optimization of handsfree microphone gain

Details Dynamic optimization of handsfree microphone gain Dynamic optimization of handsfree microphone gain

1996-08-08

1998-08-18

Zele, Krista

Telephonic communications

Substation or terminal circuitry

For loudspeaking terminal

379388, 379395, H04M 908

Patent

active

057968187

ABSTRACT:
A system and method for dynamically optimizing the analog gain for a microphone in a telephone terminal operable in handsfree mode. The system makes use of a process whereby a relatively inexpensive analog to digital converter is used to meet gain requirements so as to accommodate the loudest echo through transmit path while maintaining an acceptable signal to noise ratio for the quietest talker. The system digital signal processor in conjunction with speech activity detection means is used to provide an optimum microphone gain under all circumstances.

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patent: 5646990 (1997-07-01), Li

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