This chapter provides an overview of adaptive beamforming techniques for speech and audio signal acquisition. We review basic concepts of optimum adap-tive antenna arrays and show how these methods may be applied to meet the re-quirements of audio signal processing. In particular, we derive optimum beamform-ers using time-domain least-squares instead of frequency-domain minimum mean-squares criteria, and, thereby, are not constrained by the commonly used narrow-band and stationarity assumption. We thus obtain a more general representation of various beamforming aspects relevant to our application. From this, a robust generalized sidelobe canceller (GSC) [1] results as an attractive solution for prac-tical audio acquisition systems. Moreover, the general theoretical framework leads to new insights for the GSC behavior in complex practical situations.
CITATION STYLE
Herbordt, W., & Kellermann, W. (2003). Adaptive Beamforming for Audio Signal Acquisition (pp. 155–194). https://doi.org/10.1007/978-3-662-11028-7_6
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