DEVICE FOR TREATING SPEECH SIGNALS FOR RADIOELECTRICAL TRANSMIT-RECEIVE EQUIPMENT ADAPTED FOR TRANSMISSION AND RECEPTION OF SPEECH SIGNALS

摘要

The device is of the type comprising a circuit for compressing the dynamic of the speech signal before transmission of the signal at constant level and an expander for re-establishing at reception the speech level before compression thereof. A logic filtering circuit controls the compression circuit by constant attenuation steps depending on the speech level. A selector comparator circuit coupled by a first input to an output of the logic filtering circuit and by a second input to the output of a device controlling the expander compares the attenuation values supplied by the logic filtering circuit with those supplied by the device controlling the expander and adjusts the attenuation value of the compression circuit to the greatest of the attenuation values supplied by the logic filtering circuit or by the control device of the expander.