Beamforming

The above picture shows a prototype of a spherical 64-channel microphone array for 3-D acoustic scene analysis we designed and built at Deutsche Telekom Labs Berlin. The rigid steel sphere of the massive multichannel array has a radius of 7.5cm and the layout is based on an equal area sampling scheme.

Related Publications

[C11-1]	K. Helwani, H. Buchner, and S. Spors, "Calibration of microphone arrays with arbitrary geometries," Proc. 37th Annual German Conf. on Acoustics (DAGA), Duesseldorf, Germany, March 2011.

[C10-6]	H. Buchner, "A systematic approach to incorporate deterministic prior knowledge in broadband adaptive MIMO systems," Proc. Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, USA, Nov. 2010.

[C09-1]	A. Lombard, T. Rosenkranz, H. Buchner, and W. Kellermann, "Multidimensional localization of multiple sound sources using averaged directivity patterns of blind source separation systems," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing (ICASSP), Taipei, Taiwan, pp. 233-236, April 2009.

[C08-5]	A. Lombard, T. Rosenkranz, H. Buchner, and W. Kellermann, "Exploiting the self-steering capacity of blind source separation to localize two or more sound sources in adverse environments," Proc. ITG Conf. on Speech Communication, Aachen, Germany, Oct. 2008.

[J07-1]	W. Herbordt, H. Buchner, S. Nakamura, and W. Kellermann, "Multichannel bin-wise robust frequency-domain adaptive filtering and its application to adaptive beamforming," IEEE Transactions on Audio, Speech, and Language Processing, vol. 15, no. 4, pp. 1340-1351, May 2007.

[C05-7]	W. Herbordt, H. Buchner, S. Nakamura, and W. Kellermann, "Outlier-robust DFT-domain adaptive filtering for bin-wise stepsize controls, and its application to a generalized sidelobe canceller," Conf. Rec. Intl. Workshop on Acoustic Echo and Noise Control (IWAENC), Eindhoven, The Netherlands, September 2005.

[C05-6]	W. Herbordt, H. Buchner, S. Nakamura, and W. Kellermann, "Application of a Double-Talk Resilient DFT-Domain Adaptive Filter for Bin-wise Stepsize Controls to Adaptive Beamforming," Conf. Rec. Int. Workshop on Nonlinear Signal and Image Processing (NSIP), Sapporo, Japan, May 2005.

[C05-4]	W. Herbordt, S. Nakamura, S. Spors, H. Buchner, and W. Kellermann, "Wave Field Cancellation using Wave-Domain Adaptive Filtering," Conf. Rec. Joint Workshop on Hands-Free Speech Communication and Microphone Arrays (HSCMA), Piscataway, NJ, USA, March 2005.

[C04-8]	H. Buchner, S. Spors, W. Herbordt, and W. Kellermann, "Wave-Domain Adaptive Filtering for Acoustic Human-Machine Interfaces based on Wavefield Analysis and Synthesis," Proc. European Signal Processing Conference (EUSIPCO), Vienna, Austria, September 2004. Download my slides (pdf).

[J04-1]	H. Buchner, J. Benesty, and W. Kellermann, "Generalized Multichannel Frequency-Domain Adaptive Filtering: Efficient Realization and Application to Hands-Free Speech Communication," Signal Processing, vol. 85, no. 3, pp. 549-570, March 2005.

[C03-8]	R. Aichner, W. Herbordt, H. Buchner, and W. Kellermann, "Least-squares error beamforming using minimum statistics and multichannel frequency-domain adaptive filtering," Conf. Rec. IEEE Intl. Workshop on Acoustic Echo and Noise Control (IWAENC), Kyoto, Japan, pp. 223-226, September 2003. click here for audio examples

[C02-3]	W. Herbordt, J. Ying, H. Buchner, and W. Kellermann, "A Real-Time Acoustic Human-Machine Front-End for Multimedia Applications Integrating Robust Adaptive Beamforming and Stereophonic Acoustic Echo Cancellation," Proc. Int. Conference on Spoken Language Processing (ICSLP), Denver, CO, USA, vol.2, pp. 773-776, September 2002.

[C02-2]	H. Buchner, S. Spors, W. Kellermann, and R. Rabenstein, "Full-Duplex Communication Systems with Loudspeaker Arrays and Microphone Arrays," Proc. IEEE Int. Conference on Multimedia and Expo (ICME), Special session on coding and transmission formats for 3D audio, Lausanne, Switzerland, August 2002.

[J03-1]	W. Herbordt, H. Buchner, and W. Kellermann, "An Acoustic Human-Machine Front-End for Multimedia Applications," EURASIP Journal on Applied Signal Processing, Vol. 2003, No. 1, pp. 21-31, Jan 2003.

[C01-4]	H. Buchner and W. Kellermann, "An Acoustic Human-Machine Interface with Multi-Channel Sound Reproduction," Conf. Rec. IEEE Intl. Workshop on Multimedia Signal Processing (MMSP), Cannes, France, pp. 359-364, October 2001.

[C01-2]	W. Herbordt, H. Buchner, and W. Kellermann, "Computationally Efficient Frequency-Domain Combination of Acoustic Echo Cancellation and Robust Adaptive Beamforming," Conf. Rec. EUROSPEECH 2001, Aalborg, Denmark, pp. 1001-1004, September 2001.

[C01-1]	H. Buchner, W. Herbordt, and W. Kellermann, "An Efficient Combination of Multi-Channel Acoustic Echo Cancellation With a Beamforming Microphone Array," Conf. Rec. 1st IEEE Intl. Workshop on Hands-Free Speech Communication (HSC), Kyoto, Japan, pp. 55-58, April 2001.

[B03-1]	H. Buchner, J. Benesty, and W. Kellermann, "Multichannel frequency-domain adaptive filtering with application to acoustic echo cancellation," In J.Benesty and Y.Huang (eds.), Adaptive signal processing: Application to real-world problems, Springer-Verlag, Berlin/Heidelberg, pp. 95-128, Feb 2003.

Notes:

- Works on blind source separation, also known as blind beamforming, can be found here.

- More details on wave-domain adaptive filtering (WDAF) and its applications can be found here.

Latest update: Jun 2011