Voice activity detection method and apparatus thereof

The invention provides a voice activity detection method and an apparatus thereof. The method comprises the following steps of calculating an auditory characteristic of a sound signal, wherein the auditory characteristic includes a first dimension parameter related to a priori signal to noise ratio, a second dimension parameter related to a posterior signal-to-noise ratio and a third dimension parameter related to the time domain signal; comparing the first dimension parameter, the second dimension parameter and the third dimension parameter with corresponding auditory thresholds respectively so as to acquire a detection result. In the invention, the priori signal to noise ratio and the posterior signal-to-noise ratio are used to combine the time domain signal to represent the auditory characteristic, and the extracted auditory characteristic can be used for comparing to the auditory threshold and detecting real-time voice activities. Under a single microphone system, the auditory characteristic under a remot