Make your sysadmins happy and stop listening to those ol’ bloated MP3 streams. The new kid on the block is aacPlus, which equals the quality of streaming MP3 using roughly half the bandwidth. 59 stations using this technology are live at Tuner 2 (you’ll need to download Winamp to listen to the streams; a link is at their site.)
Advanced Perceptual Audio Coding techniques (like MPEG Layer-3 or MPEG-2 AAC) exploit the properties of the human perceptual system by eliminating audio frequencies and tones that are “masked” by other tones to achieve transmission of audio with almost perceptible loss of quality, often reducing the size of transmitted audio data by as much as 12 times…
Instead of transmitting the spectrum, SBR [Spectral Band Reconstruction] reconstructs the higher frequencies in the decoder based on an analysis of the lower frequencies transmitted in the underlying coder. To ensure an accurate reconstruction, some guidance information is transmitted in the encoded bit stream at a very low data rate…
Combining AAC with SBR results in a superset of AAC technology, called by the trade name aacPlus. This blend of technologies helps to greatly increase the efficiency of AAC - by more than 30% according to independent evaluations.
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