Method and apparatus for controlling the transmit level of telephone terminal equipment

摘要

A method and apparatus for controlling the transmit level of transmitted signals from a telephone terminal device. A gain stage applies a gain or loss to the transmit signal to adjust its signal level. The gain or loss is determined by a transmit level control module. The transmit level control module measures the transmit signal during the course of a call to determine an average signal level during active speech and the average signal level during the call is used to build a historical estimate of average signal level for the device. Following each call, a gain factor is determined based upon the historical estimate and the gain factor is used by the gain stage in setting the gain or loss applied to the transmit signal of a subsequent call. The transmit signal control module provides for an adjustment to the signal level of the transmit signal that is customized to the historical speech characteristics of the user of the device.