Test & Measurement

MWC 2016: EVS testing targets mobile device R&D

25th February 2016
Mick Elliott
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The first test & measurement solution that supports EVS, a full HD voice codec recently developed for Voice over LTE (VoLTE) services by 3GPP was unveiled at Mobile World Congress in Barcelona by Spirent Communications. The EVS codec offers improved audio quality performance at reduced bit rates, with additional features to improve the user experience while reducing costs for wireless service providers. 

Spirent’s ElevateTM Test Framework and ProlabTM Test Suite have been expanded to support EVS for both functional and performance QoE requirements.

This test coverage enables both device manufacturers and operators to move ahead with commercial EVS deployments worldwide to deliver the best audio quality in the market for both voice and music while also optimising bandwidth. 

By utilising the entire audible frequency range, EVS is able to deliver voice quality that is more clear and realistic sounding than initial VoLTE codec implementations. In addition, EVS offers a wider range of bitrates to improve system efficiency and utilises unique jitter buffer management and packet loss concealment techniques to minimise the degradation of voice quality caused by adverse conditions in the transmission channel.

EVS testing and measurement is complex because there are many codec configurations, features, parameters, and audio quality measurements to take into consideration.

Spirent’s Elevate Test Framework with Prolab is a test platform that can configure the numerous network parameters to fully emulate real world scenarios and evaluate the EVS codec under dozens of scenarios including adversarial conditions.   

“Our EVS offering is the latest in our portfolio of solutions focused on helping the ecosystem develop and deploy new services that enhance the mobile user experience,” said Rob VanBrunt, General Manager, Wireless at Spirent Communications.  “We have been working side by side with R&D teams in the world’s leading chipset design labs to validate the functional performance of EVS’ differentiating features.  In parallel, we are collaborating with service providers using our leading audio quality performance methodology to further analyse this codec’s enhanced user experience both in the lab and on the live network.  Spirent’s breadth of expertise and solutions enables the mobile ecosystem to deliver a faster and more economical rollout.” 

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