23. August 2018
Telefónica Deutschland has successfully implemented the voice standard Enhanced Voice Services (EVS) within its national LTE network. Technically speaking, the new voice standard is a further development of AMR-WB (Adaptive Multi-Rate Wideband): O2 customers in the LTE network can now make calls in excellent Full HD voice quality. With EVS, telephone calls are transmitted much more clearly and naturally than before – EVS transmits the audible frequency range at up to 16,000 Hertz instead of up to 7,000 Hertz as used to be the case. As a result, EVS means conversations are perceived as clearer, more understandable and therefore more natural. Another advantage is that the new codec allows background noise to be suppressed better than before. EVS significantly improves the sound image compared to previous mobile calls.