Monitoring the quality of speech in the communication system BESIP

This paper deals with the monitoring and evaluation of speech quality between two endpoints which has been developed in the BESIP project (Bright Embedded Solution for IP Telephony). The BESIP is a simple and effective solution for SIP communication server enabling an easy integration into a computer network based on open-source solutions. This device serves to provide IP telephony for smaller workplaces. The main reason for the development and implementation of a module for monitoring into the BESIP system was the ability to evaluate speech quality. The principle of this module is based on an ability to assess an estimated speech quality at the user´s side without the necessity to compare original and degraded signals. The speech quality evaluation is performed in accordance with ITU-T G.107.