Audio MOS Voice Quality

Voice Experience Evaluation for any device any technology, VoNR, VoLTE, VoWiFi, OTT and legacy Voice Services 2G, 3G.

Introduction

Despite changes in end users' behaviors voice communication remains a key service for Mobile Network Operators worldwide. In the last years, there has been a steady increase in OTT voice services competing in many cases with operators.

SmartViser is offering an innovative solution based on the industry standard POLQA V3 algorithm Speech Quality, MOS Score.

Mean Opinion Score (MOS):
The Mean Opinion Score, or MOS as it is now widely known, assesses the quality of voice of calls using a scale of 1-5 (5 being the highest quality) based on the scientific algorithm POLQA ™.

POLQA™ MOS scores:

Score 1: means that despite great effort, it is impossible to understand what is being said during the call (the call repeatedly cuts in and out).
Score 2: means the quality is not good and a lot of effort is needed to understand.
Score 3: indicates an acceptable level of quality and fairly understandable conversation.
Score 4: is a good quality level, understandable with minor interference noise.
Score 5: is an excellent quality level, understandable discussion without interference noise.

Factors Affecting Speech Quality: Several factors impact the MOS score in a telecommunications context, including:

Network Performance: Latency, jitter, and packet loss during transmission can degrade voice quality.
Codec Quality: Different codecs compress and decompress audio data, and their efficiency can affect sound quality.
Echo and Noise: Background noise and echo can also reduce the clarity and intelligibility of speech.

Challenges and solutions

Challenges to overcome include

Assess the launch readiness of new voice services like VoNR, VoLTE, VoWiFi, OTT and more.
Benchmark the voice experience of any device (Android, iOS) for device acceptance testing, marketing assessments, and Regulators testing.
Test on different networks both live or in the lab using actual end user devices for best evaluation of end user experience.
Perform truly objective testing that uses POLQA algorithm to measure accurately the MOS score would be without requiring human listeners.

How we solve them

Test on any chipset, any device Android, or iOS using end users' devices without rooting or jailbreaking.
Easy setup and scalable setup. No bulky equipment required.
Test on any OTT WhatsApp, Viber, Microsoft Teams, Skype, Messenger, Google Meet etc.
Full end-to-end automation.
Measure call performance at the same time with Audio MOS/ Speech Quality.
Enhanced data analytics to help visualise, drill down, and benchmark the data.
Unique Audio MOS scores plotted on a map for ease of analysis.