HE-AAC　解码器原码支持LC profile 和 SBR 模块，专门针对ARM芯片进行了优化

FAAD2 is a HE, LC, MAIN and LTP profile, MPEG2 and MPEG-4 AAC decoder. FAAD2 includes code for SBR (HE AAC) decoding. FAAD2 is licensed under the GPL. 该版本是最新发布的版本，能够在VC6.0和VC8.0下编译通过。

FAAD2 is an open source MPEG-4 and MPEG-2 AAC decoder, it is licensed under the GPLv2 license. Features: Portable Reasonably fast LC, Main, LTP, SBR, PS support DRM support through DreaM DAB+ support Source packages are available in the

FAAC is an MPEG-4 and MPEG-2 AAC encoder. Note that the quality of FAAC is not up to par with the currently best AAC encoders available. Features: * Portable * Reasonably fast * LC, Main, LTP support * DRM support through DreaM