EVS goes global

© Photo Fraunhofer IIS/Kurt Fuchs

Like talking face to face: EVS improves voice quality.

Full HD Voice quality available on cell phone calls in USA, Japan, South Korea, and Germany.

Once the fourth-generation mobile communications system was introduced, the technology quickly gained acceptance because it offered significantly higher transmission power, and IP-based infrastructure. While this initially only applied to data transfer, voice services are now increasingly switching over to the system – and are known as “Voice over LTE” services. The Enhanced Voice Services codec (EVS) was developed so that these services could deliver comparable voice quality to “over-the-top” services such as Skype. We played a major role in developing EVS, and the results of the work were presented as a new 3GPP standard in late 2014. The first smartphones with integrated EVS were launched in 2016, and users in USA, Japan, South Korea, and Germany have been able to enjoy the new EVS quality on selected cell phone networks since the end of 2016. As the first 3GPP voice codec, EVS can deliver the full audio spectrum (up to 20 kHz) perceptible to humans. This makes EVS the first Full- HD-Voice-capable audio codec for use in mobile telephony. Cell phone users will benefit from a unique audio and voice experience that is comparable to today’s media services (e.g., streaming music and films) in terms of quality. In addition, EVS is significantly more resistant to failure, which not only ensures better sound quality, but also increases the performance of the mobile communications infrastructure.