4. The system of claim 3 , wherein the speech segmentation module is further configured to determine whether the variance of the energy of said audio over each second time interval is greater than the lower threshold value of variance of the energy of said audio and less than the threshold value of variance of the energy of said audio, and determine for said audio over each of said second time intervals having variance of the energy greater than the lower threshold value and less than the threshold value of variance that said audio over each of said second time intervals contains speech if a previous segment of said audio over a previous second time interval is determined to contain speech and does not contain speech if the previous segment of said audio over the previous second time interval is determined to not contain speech.
3. The system of claim 1 , wherein the speech segmentation module is further configured to determine whether the variance of the energy of said audio over each second time interval is less than a lower threshold value of variance of the energy of said audio one standard deviation below the mean variance of energy of the audio signal, and determine for said audio over each of said second time intervals that said audio over each of said second time intervals does not contain speech in response to determining that the variance of the energy of said audio over each second time interval is less than the lower threshold value.