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Small-Scale Matched Filter Array Processing for Spatially Selective Sound Capture

By Richard J. Renomeron, Daniel V. Rabinkin, Joseph C. French and James L. Flanagan


Matched Filter Array (MFA) Processing hasa distinct advantage over delay-sum beamforming for reverberant enclosures in that it is able to cohere significant reflected images in addition to the direct arrivals and is capable of spatial selectivity in three dimensions. However, previous study of this technique utilized a very large number of sensors, which is beyond the A/D capacity and computational power of current commercially available DSP hardware. In this paper, the results of using matched filtering with only 8 sensors in real rooms are presented. It is found that a moderate amount of reverberation can be removed, which suggests that the technique may prove useful for high-quality speech pickup for teleconferencing in a small room environment. 1 Introduction Recent technology development in the field of telecomunication applications has caused increased demands to be placed on the performance of accoustic capture cabalities of communication systems. The requirement of hands-free..

Year: 1997
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