Vodacom South Africa is partnering device manufacturers to introduce the next chapter in the evolution of the Vodacom network, Enhanced Voice Services (EVS) – also known as Super High Definition (SHD) voice or HD Voice+ in a live commercial network.
VoLTE subscribers using a compatible handset on the Vodacom network can now experience improved voice clarity made possible by the EVS codec.
Vodacom launched VoLTE three years ago and is now pioneering the evolution of this technology in South Africa with EVS being the successor of the current HD Voice Codec called AMR-WB (Adaptive Multi-Rate Wideband).
EVS can deliver speech quality that matches other audio sources such as hi-fidelity stored music and is designed to offer up to 20kHz of audio bandwidth (CD quality). In addition, EVS has been shown to provide coverage gains for cell-edge users, which will translate in better voice quality performance in cell-edge conditions, i.e. where coverage might not be optimal.
VoLTE, without EVS, offers more than double the bandwidth available over 2G voice, and is similar to 3G WB AMR codec (23.85). With the addition of EVS, the bandwidth is again increased, further improving speech quality when using EVS-SWB (Super Wideband). Vodacom continues to focus on bringing the latest enhancements to the network to ensure high performance and end user satisfaction.
Last month, Telefónica Deutschland (O2 Germany) announced that it has successfully implemented the Enhanced Voice Services (EVS) within its national LTE network.