Browse Prior Art Database

ALGORITHM FOR HANDS FREE SPEAKERPHONE

IP.com Disclosure Number: IPCOM000007559D
Original Publication Date: 1995-Nov-01
Included in the Prior Art Database: 2002-Apr-05

Publishing Venue

Motorola

Related People

Authors:
Z. Shwartzman H. Claude L. Fabian

Abstract

Many voice activated speakerphone circuits have been implemented in a number ofofftce and mobile radio products. Generally, the design concept used in such voice activated speakerphone circuits employs two variable attenuators, one in the transmit path and one in the receive path of the speakerphone. The two attenuators are typically controlled by a voice activated logic circuit monitoring the voice activity, and controlling the audio levels of the transmit and receive paths to allow halfduplex operation, i.e. con- versations in one direction at a time.