opencore-amr contains an implementation of the 3GPP TS 26.073 
specification for the Adaptive Multi Rate (AMR) speech codec and 
an implementation for the 3GPP TS 26.173 specification for the 
Adaptive Multi-Rate - Wideband (AMR-WB) speech decoder. The 
implementation is derived from the OpenCORE framework, part of the 
Google Android project.
