A method and apparatus for detecting and transmitting voice signals in a packet voice network system. The method and apparatus make use of a voice activity detection (VAD) unit at a transmitter, for determining if an input signal contains active audio information or passive audio information, where the...http://www.google.com.au/patents/US6889187?utm_source=gb-gplus-sharePatent US6889187 - Method and apparatus for improved voice activity detection in a packet voice network
