Audio MOS Voice Quality
Voice Experience Evaluation for any device any technology, VoNR, VoLTE, VoWiFi, OTT and legacy Voice Services 2G, 3G.
Overview of Audio/Voice Quality MOS Solution
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.
Key Highlights
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Supports any device Android or iOS​
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Works on any chipset
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Can be used on non rooted devices for true end user experience evaluation
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Full End to End Evaluation MO (Uplink) and MT (Downlink)
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Fully standalone and light solution
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Static or Mobility Testing
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MOS based on POLQA V3 Algorithm
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Can be used for Cellular calls assessment 2G, 3G, VoLTE, VoWiFi, 5G NR
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Supports any OTT calls, WhatsApp, Viber, Microsoft Teams, Google Meet, Facebook Messenger, Skype
Use cases
Regulators
Assessing and benchmarking performance, different networks, devices and technology.
OEMs
As part of voice service evaluation, pre-launch assessment and ongoing monitoring throughout Software and OS upgrades.
MNOs Device
Device acceptance teams to ensure any devices in the networks offers the best end user experience in terms of speech quality.
Mission Critical
For PTT (Push to Talk)
assessments based on ETSI Standards assessing Voice Performance MOS scores using an Industry Standard like POLQA.
Chipset Vendors
Tests teams to ensure thorough testing and voice quality MOS score in different cellular technologies, prior to technology release.
MNOs Network
Service Quality teams to ensure voice quality MOS score in different technologies, vendors and geographical regions. Assesements on Public, Private and Non Terrestrial Networks (NTNs)
Labs
Perform testing campaigns using the latest technologies including benchmarking on different devices or different Mobile Network Operators.
Satellite NTN
Ensure performance and full interoperability with Android and iOS devices. Test on different network conditions to ensure calls are established and maintained for QoS and QoE assessment.
KPIs
Voice Quality MOS for smartphones and networks are vital for ensuring high-quality voice communication. By monitoring and analyzing key KPIs , telecom operators and device manufacturers can provide superior voice services, enhance user satisfaction, and maintain a competitive edge in the market. Some of the KPIs supported are:
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MOS score POLQA
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Call establishment Time
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Duration in dialing
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Call States
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Call types
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Call Distribution
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Audio bandwidth
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Mouth-to-Ear delay
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Intermittent score every 8 seconds
Sample Reports from Analytics Studio
MOS averages displayed on a map chart in Analytics Studio.
MOS results and audio files in the Audio page of Analytics Studio.
MOS averages displayed on a map chart in Analytics Studio.
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:
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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).
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Score 2: means the quality is not good and a lot of effort is needed to understand.
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Score 3: indicates an acceptable level of quality and fairly understandable conversation.
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Score 4: is a good quality level, understandable with minor interference noise.
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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:
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Network Performance: Latency, jitter, and packet loss during transmission can degrade voice quality.
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Codec Quality: Different codecs compress and decompress audio data, and their efficiency can affect sound quality.
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Echo and Noise: Background noise and echo can also reduce the clarity and intelligibility of speech.
