Reference implementation: 3GPP TS 26.410 V8.0.0
Wrapper and library code: Stanislav Brabec <utx@penguin.cz>, 
Adopted for aac+: Sergiy Guriev <piratfm@ua.fm>, 
Encoder code: Matteo Croce
Patches and fixes: Rafael Diniz, Edwin van den Oetelaar