Sixth European Conference on Speech Communication and Technology

Budapest, Hungary
September 5-9, 1999

Microphone Array Design for Robust Speech Acquisition and Recognition

Julian Fernández, Eduardo Lleida, Enrique Masgrau

Dept. Ingeniería Electrónica y Comunicaciones, Universidad de Zaragoza, Zaragoza, Spain

The aim of this paper is to study the use of a robust acquisition system based on a microphone array for speech related applications in real situations. A comparison is performed between two beamforming methods: the Delay and Sum beamforming (DS) and the Spatial Reference Optimal beamforming (SRO). Both of them are frequency domain designed, using harmonic spatial distributed microphones. The quality of the microphone array output signal for the different beamforming approaches is measured by using a continuous speech recognition system based on discrete HMMs. Results of the speech recognition system show the advantage of using a microphone array with the SRO beamforming as front-end.

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Bibliographic reference.  Fernández, Julian / Lleida, Eduardo / Masgrau, Enrique (1999): "Microphone array design for robust speech acquisition and recognition", In EUROSPEECH'99, 2363-2366.