Now standardized as MPEG-4 High Efficiency
AAC, aacPlus is the combination of MPEG AAC and Coding Technologies'
SBR (Spectral Band Replication) technology. This combination increases
the efficiency of MPEG AAC by up to the factor of two. As a result,
aacPlus delivers streaming and download 5.1 surround at 128Kbps,
CD-quality stereo at 48 kbps and excellent quality stereo at 32
kbps. This level of efficiency fundamentally enables new applications
in the markets of mobile, Internet, and digital broadcast.
aacPlus builds on a strong heritage
in digital radio applications and reaches out into television
broadcast, mobile audio, and Internet content distribution. First
class references like XM Satellite Radio and Digital Radio Mondiale
show how the coding efficiency and error resilience of aacPlus
makes it the premier choice for bandwidth constrained applications.
The value of aacPlus has been demonstrated by multiple
3rd party tests. In careful double-blind listening tests conducted
by Digital Radio Mondiale, MPEG, and the European Broadcasting
Union, aacPlus outperformed all other codecs in the competition.
Below is the results graph from the European Broadcasting
Union testing at 48Kbps stereo.
Encoders: Win32, Linux, MacOS X, TI, Motorola, other DSPs.
Decoders: Win32, Linux, MacOS X, ARM, TI, NEC, STMicroelectronics,
Trimedia, other DSPs.
StreamGuys uses Orban encoders to deliver
aacPlus streams. We distribute the encoders directly. Please contact
us to discuss your specific needs. Please
call (707) 667-9479 or toll free (877) 287-2938
Hear it for yourself! The best AACPlus streams are all in one place. Find your favorite at www.tuner2.com.
Technical White Papers, for Audio Engineers:
aacPlus Audio Comparison Guide
aaPlus Technical Specifications.
HERE for our "Live Streaming" Page.