Method for detecting a voice activity decision (voice activity detector)

摘要

The invention relates to a method for determining voice activity in a signal section of an audio signal. The result, i.e. whether voice activity is present in the section of the signal thus observed, depends upon spectral and temporal stationarity of the signal section and/or prior signal sections. In a first step, the method determines whether there is spectral stationatity in the observed signal section. In a second step, the method determines whether there is temporal stationarity in the signal section in question. The final decision as to the presence of voice activity in the signal section observed depends upon the initial values of both steps.