35. The apparatus of claim 33 , wherein the input parameters comprise one or more of a noise suppressed speech signal, voice activity information, Linear Prediction reflection coefficients, Normalized Auto-correlation Coefficient Function information and Normalized Auto-correlation Coefficient Function at pitch information.
35. The apparatus of claim 33 , wherein the input parameters comprise one or more of a noise suppressed speech signal, voice activity information, Linear Prediction reflection coefficients, Normalized Auto-correlation Coefficient Function information and Normalized Auto-correlation Coefficient Function at pitch information. 37. The apparatus of claim 35 , wherein the internal parameters comprise one or more of a zero crossing rate parameter, a current frame energy parameter, a look ahead frame energy parameter, a band energy ratio parameter, a three frame averaged voiced energy parameter, a previous three frame average voiced energy parameter, a current frame energy to previous three frame average voiced energy ratio parameter, a current frame energy to three frame average voiced energy parameter and a maximum sub-frame energy index parameter.