6 AMR-WB backward compatible ANSI-C code

26.4463GPPAdaptive Multi-Rate - Wideband (AMR-WB) backward compatible functionsCodec for Enhanced Voice Services (EVS)Release 17TS

The ANSI C-code of the EVS codec, including backward compatible functions, is described in [3] and [22] for fixed point arithmetic operation, using different sets of basic operators, and is described in [4] for floating point arithmetic operation.