Compression of voice and data signals by at least an order of magnitude that permits greater use of the limited bandwidth at the low frequency of operation. A voice recognition system that converts words spoken into a microphone into a sequence of letters and gaps. An encoder codes the letters into a...http://www.google.de/patents/US6813601?utm_source=gb-gplus-sharePatent US6813601 - Highly compressed voice and data transmission system and method for mobile communications
