Improving the performance of a non-intrusive metric of voice quality assessment considering IP network parameters

In a voice-over-IP (VoIP) communication there are different factors that degrade the voice signal quality, and these degradations need to be evaluated in real time. In this scenario, the non-intrusive metrics such as the ITU-T P.563 recommendation are the most indicated. However, this metric has not a suitable performance if compared with intrusive metrics. In this study, an adjustment function is proposed to improve the P.563 metric's performance considering the packet loss parameter. The results show that the performance in relation to ITU-T P.862 was improved, obtaining a Pearson- correlation- coefficient and a maximum error of 0.99 and 0.40, respectively.