1 Scope

26.1913GPPAdaptive Multi-Rate - Wideband (AMR-WB) speech codecError concealment of erroneous or lost framesRelease 17Speech codec speech processing functionsTS

This specification defines an error concealment procedure, also termed frame substitution and muting procedure, which shall be used by the AMR-WB speech codec receiving end when one or more erroneous/lost speech or lost Silence Descriptor (SID) frames are received.

The requirements of this document are mandatory for implementation in all networks and User Equipment (UE)s capable of supporting the AMR-WB speech codec. It is not mandatory to follow the bit exact implementation outlined in this document and the corresponding C source code.