Codec2 HF Digital Voice at 450 bps

Thomas Kurin, a student at the Friedrich-Alexander University Erlangen-Nuremberg, has developed a version of Codec2 that encodes speech at just 450 bps

Any speech codec running as low as 450 bit/s is pretty special, and this work is also a great starting point for further innovation and quality improvements.

More Information - http://www.rowetel.com/?p=6212