Abstract :
A voice activity detector for the microphone array system, using spatial information obtained by the eigen-decomposition of a multichannel correlation matrix, is introduced. Voice activity is detected by the likelihood ratio test under the assumption that phase vectors of speech absent and present signals have Gaussian distributions.
Keywords :
Gaussian distribution; correlation methods; eigenvalues and eigenfunctions; microphone arrays; speech processing; Gaussian distribution; eigendecomposition; likelihood ratio test; microphone array; multichannel correlation matrix; phase vector; spatial information; speech signal; voice activity detection;
