Voice Quality Testing Across All Networks

Apr 2022    00:59:39

Presented by : Dr. Vikram Kulkarni, Robert Bichefsky, Raghavendhra Rao


Voice quality is essential for all networks as well as gateways and switches. Providing the mechanism for voice quality testing across several transmission channels is essential and critical in the next generation networks.

GL’s Voice Quality Testing (VQT™) software utilizes widely accepted algorithms to provide measurements of voice quality over all types of networks including ATM, VoIP, PSTN, and Cellular. The VQT™ software can work either independently, or in conjunction with VQuad™ - Dual UTA HD or VQuad™ Probe HD.

The VQT™ solution supports next-generation Voice Quality testing algorithms for IP and Analog networks using Perceptual Objective Listening Quality Analysis (POLQA) per ITU-T P.863, and Perceptual Evaluation of Speech Quality (PESQ) per Rec. P.862.1 and P.862.2.

The PESQ algorithm provides an objective measurement of subjective listening tests on telephony systems. The POLQA algorithm is a next generation voice quality testing standard for fixed, mobile, IP-based networks. Supports the latest HD-quality speech coding and network transport technology with higher accuracy for 3G, 4G/LTE, 5G, and VoIP networks. Support also includes Over-The-Top (OTT) applications and Voice over Wi-Fi (VoWiFi).

The optional POLQA version 3 supports Full Band Audio Analysis which provides improved scoring for mobile-based VoLTE, 5G, and OTT applications using Enhanced Voice Services (EVS) and OPUS codecs. VQT™ POLQA v3 also supports less harsh analysis of micropauses within the speech, reacts with less sensitivity to linear frequency distortions, and includes a significantly improved and streamlined perceptual model.

For more information on VQT™, please visit our website: Voice Quality Testing webpage.

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