High Efficiency Advanced Audio Coding technology (also known as AAC+) was
standardized as Part 3 of the MPEG-4 international standard. The Advanced
Audio Coding in MPEG-4 Part 3 was enhanced relative to specifications of
MPEG-2 Part 7 (AAC LC and Main profiles), in order to provide better sound
quality in terms of the bit rate used for encoding. HE AAC v1 (or AAC+)
technology combines Advanced Audio Coding (AAC) and Spectral Band
Replication (SBR) algorithms. HE AAC technology can also be advanced to HE
AAC v2 or eAAC+. This profile features Parametric Stereo (PS) technique. The
codec can operate at very low bitrates and generally outperforms other popular
codecs in the 32-64 Kbps range.
Features
High optimization
Full compliance with MPEG-4 part 3 standard
HE AAC v1 and v2 support
Sampling rates from 8 to 96 kHz
Bit rates from 8 to 384 Kbps for mono and from 16 to 768 Kbps for stereo signal
Support for LC profile
Optional LD/LTP/SSR decoding tools support
Simple API
Benefits
Highly optimized code ideal for resource constrained applications
