scope:

The present document provides a study of technical updates to the DECT standard to enable super wideband (SWB) audio calls in existing DECT slot formats as well as technical improvements to narrowband (NB) and wideband (WB) calls. All required change requests are listed and defined for the different DECT layers to enable high quality audio communication between DECT FP and PP including DECT repeaters (relays). The study includes an investigation on FEC for block-based codecs. Information is provided on the audio quality in some DECT use cases for NB, WB and SWB and potential improvements by a new audio codec are studied.