5. The method of claim 2 further comprising: receiving an initial plurality of frames of the speech signal; calculating the silence mean cepstral vector using the initial plurality of frames; calculating a silence cepstral distance of the initial plurality of frames using the silence mean cepstral vector; obtaining the first cepstral distance threshold and the second cepstral distance threshold using the silence cepstral distance.
2. The method of claim 1 further comprising: using a third condition to make a third end-point decision for the at least one frame of the plurality of frames by comparing the energy parameter to a third energy threshold and by comparing the cepstral distance to a second cepstral distance threshold, wherein the third energy threshold is lower than the second energy threshold and the second cepstral distance threshold is higher than the first cepstral distance threshold.