A digital audio transmitter system capable of transmitting high quality, wideband speech over a transmission channel with a limited bandwidth such as a traditional telephone line. The digital audio transmitter system includes a coder for coding an input audio signal to a digital signal having a transmission...http://www.google.de/patents/US20010038686?utm_source=gb-gplus-sharePatent US20010038686 - Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth
