Abstract
A scheme for detecting and locating speech signals in the presence of reverberations using a linear array is proposed. The equispaced linear array with a plurality of omni-directional microphones is decomposed into two groups. Pairs of virtual and steerable directional microphones are then generated by using the frequency invariant beamforming technique for time delay estimations. This enables the microphone array to behave like ears in a human-like fashion to enhance the likelihood of valid speaker direction estimation. Additional decision rules are incorporated to enhance the robustness of the scheme.
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