A Method for Estimating a Priori Speech Absence Probability Based on a Two Channel Structure

摘要

The present invention relates to a method for predicting a pre-speech absence probability based on a two-channel structure. More specifically, the present invention calculates a ratio of normalized speech to interference noise from a two-channel micro input signal, And a method for estimating the probability of a speech sound absence based on two channel structures. A method for estimating a dictionary speech absence probability based on two channel structures comprises: inputting two micro signals; Calculating a power spectral density (PSD) for each of the input signals; Calculating a spatial coherence and a normalized direct dispersion noise ratio (DDR) based on the PSD for each of the signals; Wherein the normalized speech-to-interference noise ratio (SIR) is calculated based on the spatial coherence and the DDR; And obtaining a proactive voice absence probability (SAP) based on the SIR.