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Voice signal enhancement for human-machine interfaces

Marciniak T., Dąbrowski A., Cetnarowicz D.

Foundations of Control and Management Sciences

2004

No. 2

45-54

This article presents a problem of improvement of speech signals for their direct use to the voice control in automation and robotics, i.e. for the realization of the so-called human-machine interfaces (HMI's). It is shown that significant improvement of the speech intelligibility, and thus, performance of the automatic speech recognition (ASR) systems, can be achieved by application of a microphone array and an appropriate algorithm for directional filtering. An experimental hardware (and software) has been worked out using the TMS320C6711 digital signal processor (DSP) by Texas Instruments Inc.