Adapting Correction Factors in Probability Distribution Function for VAD Improvement
Hassan Farsi · 2009
One of the new methods that used in Voice activity detection (VAD) systems is estimating the Probability Distribution Function (PDF) of the speech signal. This estimation becomes hard in noisy environments especially low value of Signal-to-Noise Ratios (SNR). This paper studies on three types of PDFs and selects one of them to modify and approximate the original signal. Then we compare the results of this PDF before and after modification. Keywords—Voice Activity Detection, Statistical Model, Correction Factors, Probability Distribution Function, Low Signal-toNoise Ratio.