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Prof. Dr.-Ing. Sascha Spors

Lupe

Research Topics:

  • Spatial Sound Capture and Sythesis
  • Perception of Synthetic Sound Fields
  • Digital Signal Processing for Acoustic Systems
  • Adaptive Algorithms for Massive Multichannel Acoustic Systems


Biography:

Sascha Spors joined the Deutsche Telekom Laboratories in 2005 as a senior scientist were he was heading the audio technology group. From the Electrical, Electronic and Communication Engineering Faculty of the University Erlangen-Nuremberg, he obtained his Doctoral Degree (Dr.-Ing.) with distinction in January 2006, as a result of his work as a research scientist at the Chair of Multimedia Communications and Signal Processing. The topic of his doctoral thesis was the active compensation of the listening room characteristics for sound reproduction systems. During his thesis work from 2001 to 2006, he conducted research on wavefield analysis, wavefield synthesis and massive multichannel adaptation problems. He also worked on multimodal object-localization and numerical simulation of wave propagation. He was an active member of various external funded research projects, e.g. the EC IST project CARROUSO. Sascha Spors is member of the IEEE, the "Deutsche Gesellschaft für Akustik (DEGA)" and the Audio Engineering Society (AES). 2011 he has recieved the Lothar-Cremer-Preis of the "Deutsche Gesellschaft für Akustik (DEGA)". He is member of the IEEE Audio and Acoustic Signal Processing Technical Committee and chair of the AES Technical Committee on Spatial Audio.



Address
Signal Theory and Digital Signal Processing

Institute of Communcations Engineering
University Rostock
Richard-Wagner-Strasse 31 (Haus 8)
D-18119 Rostock
Tel:  +49 381 498 7300

Projects

Research Grants

  • Signal Processing for Reproduction of Room Acoustics (DFG)
  • Analyse von holophonen Darbietungen mittels binauraler Signalverarbeitung (DFG)
  • Mikrofonarrays für Raumakustik und Auralisierung (BMBF)

Research Projects - Deutsche Telekom Laboratories

  • Analysis and Synthesis of Sound Fields
  • Next Generation Conferencing

Innovation Projects - Deutsche Telekom Laboratories

 

Finished Projects


Teaching Activities

Courses and Seminars

Bachelor, Master, and Diploma Theses

  • a wide variety of topics are availabe. Please contact me if you are interested in perfoming a thesis in my fields of interest.

Internships

  • various topics are available in the area of real-time implementation of audio signal processing. Please contact me if you are interested.

Publications

My complete list of publications can be found below. Please feel free to contact me in case of questions or comments. Please note that the articles till 2005 can be downloaded via my former homepage at the University of Erlangen-Nuremberg.

Dissertation / PhD Thesis

S. Spors. Active Listening Room Compensation for Spatial Sound Reproduction Systems. PhD thesis, University of Erlangen-Nuremberg, 2006.

Presentation Slides

Some of my (paper) presentations can be downloaded below. Please cite the associated paper if you use material from the slides. You might find some additional material (e.g. animations, samples) at our spatial audio research BLOG or on my youtube channel.

List of Publications

2012
S. Spors and H. Wierstorf. Evaluation of perceptual properties of phase-mode beamforming in the context of data-based binaural synthesis. In International Symposium on Control, Communications, and Signal Processing, May 2012.
[ .pdf ]
M. Geier, T. Hohn, and S. Spors. An open source C++ framework for multithreaded realtime multichannel audio applications. In Linux Audio Conference, pages 183-188, Standford, USA, April 2012.
[ .pdf ]
S. Spors, H. Wierstorf, and M. Geier. Comparison of modal versus delay-and-sum beamforming in the context of data-based binaural synthesis. In 132nd AES Convention. Audio Engineering Society (AES), April 2012.
[ .pdf ]
H. Wierstorf and S. Spors. Sound field synthesis toolbox. In 132nd AES Convention. Audio Engineering Society (AES), April 2012.
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J. Ahrens and S. Spors. Wave field synthesis of a sound field described by spherical harmonics expansion coefficients. Journal of the Acoustical Society of America (JASA), 131(3):2190-2199, March 2012. doi:10.1121/1.3682036.
[ http ]
M. Cobos, S. Spors, J. Ahrens, and J.J. Lopez. On the use of small microphone arrays for wave field synthesis auralization. In AES 45th International Conference, Helsinki, Finnland, March 2012. Audio Engineering Society (AES).

S. Spors and H. Wierstorf. On the implementation of range extrapolation of head-related impulse responses by virtual sound field synthesis. In German Annual Conference on Acoustics (DAGA), March 2012.
[ .pdf ]
K. Helwani, T. Rettberg, S. Spors, and H. Buchner. Towards a modular system for real-time multiple-input/multiple-output audio processing. In German Annual Conference on Acoustics (DAGA), March 2012.
[ .pdf ]
S. Ciba, K. Helwani, H. Wierstorf, K. Obermayer, A. Raake, and S. Spors. Employing a binaural auditory model to classify everyday sound events. In German Annual Conference on Acoustics (DAGA), March 2012.
[ .pdf ]
H. Wierstorf, A. Raake, and S. Spors. Psychoakustik der wellenfeldsynthese: Vor- und nachteile von binauraler simulation. In German Annual Conference on Acoustics (DAGA), March 2012.
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T. Rettberg, K. Helwani, S. Spors, and H. Buchner. Practical aspects of the calibration of spherical microphone arrays. In German Annual Conference on Acoustics (DAGA), March 2012.
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S. Weinzierl, K. Brandenburg, D. de Vries, A. Lindau, H.-J. Maempel, S. van de Par, B. Rafaely, S. Spors, and M. Vorländer. The SEACEN project. In German Annual Conference on Acoustics (DAGA), March 2012.

J. Ahrens and S. Spors. Applying the ambisonics approach to planar and linear distributions of secondary sources and combinations thereof. Acta Acustica united with Acustica, 98(1):28-36, January 2012. doi:10.3813/AAA.918489.
[ http ]
2011
J. Ahrens and S. Spors. Wave field synthesis of moving virtual sound sources with complex radiation properties. Journal of the Acoustical Society of America (JASA), 130(5):2807-2816, November 2011. doi:10.1121/1.3640850.
[ http ]
B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl. SOFiA - Sound field analysis toolbox. In International Conference on Spatial Audio, Detmold, Germany, November 2011.
[ .pdf ][Sources]
J. Ahrens and S. Spors. Two physical models for spatially extended virtual sound sources. In 131th AES Convention. Audio Engineering Society (AES), October 2011.
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K. Spors, S. Helwani and J. Ahrens. Local sound field synthesis by virtual acoustic scattering and time-reversal. In 131th AES Convention. Audio Engineering Society (AES), October 2011.
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S. Spors, V. Kuscher, and J. Ahrens. Efficient realization of model-based rendering for 2.5-dimensional near-field compensated higher order ambisonics. In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, New Paltz, USA, October 2011.
[ .pdf ]
H. Wierstorf, S. Spors, and A. Raake. Assessment of the perception of synthesized sound fields with a binaural model. In Forum Acousticum, June 2011.
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S. Spors and J. Ahrens. Interpolation and range extrapolation of head-related transfer functions using virtual local sound field synthesis. In 130th AES Convention. Audio Engineering Society (AES), May 2011.
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J. Ahrens and S. Spors. On the scattering of synthetic sound fields. In 130th AES Convention. Audio Engineering Society (AES), May 2011.
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H. Wierstorf, M. Geier, A. Raake, and S. Spors. A free database of head related impulse response measurements in the horizontal plane with multiple distances. In 130th AES Convention. Audio Engineering Society (AES), May 2011.
[ .pdf ]
K. Helwani, S. Spors, and H. Buchner. Spatio-temporal signal preprocessing for multichannel acoustic echo cancellation. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2011.

J. Ahrens and S. Spors. An analytical approach to local sound field synthesis using linear arrays of loudspeakers. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2011.
[ .pdf ]
S. Spors and J. Ahrens. Efficient range extrapolation of head-related impulse responses by wave field synthesis techniques. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2011.
[ .pdf ]
J. Ahrens and S. Spors. Über die Streuung im synthetischen Schallfeld. In German Annual Conference on Acoustics (DAGA), March 2011.
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S. Spors and J. Ahrens. Generation of far-field head-related transfer functions using sound field synthesis. In German Annual Conference on Acoustics (DAGA), March 2011.
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S. Spors. Schallfeldsynthese: Stand der Technik und Perspektiven. In German Annual Conference on Acoustics (DAGA), March 2011.
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B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl. Zeitinvarianzen durch Temperaturveränderung bei sequentiellen sphärischen Mikrofonarrays im Plane Wave Decomposition Verfahren. In German Annual Conference on Acoustics (DAGA), March 2011.

B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl. Soft-limiting der modalen Amplitudenverstärkung bei sphärischen Mikrofonarrays im Plane Wave Decomposition Verfahren. In German Annual Conference on Acoustics (DAGA), March 2011.

H. Wierstorf, S. Spors, and A. Raake. Binaurale Modellierung der Wahrnehmung mit Wellenfeldsynthese generierter Schallfelder. In German Annual Conference on Acoustics (DAGA), March 2011.
[ .pdf ]
K. Helwani, S. Spors, and H. Buchner. Calibration of microphone arrays with arbitrary geometries. In German Annual Conference on Acoustics (DAGA), March 2011.
[ .pdf ]
2010
K. Helwani, H. Buchner, and S. Spors. On the robust and efficient computation of the kalman gain for multichannel adaptive filtering with application to acoustic echo cancellation. In Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, USA, November 2010.
[ .pdf ]
J. Ahrens and S. Spors. On the anti-aliasing loudspeaker for sound field synthesis employing linear and circular distributions of secondary sources. In 129th AES Convention, San Fransisco, UK, November 2010. Audio Engineering Society (AES).
[ .pdf ]
H. Wierstorf, M. Geier, and S. Spors. Reducing artifacts of focused sources in wave field synthesis. In 129th AES Convention, San Fransisco, UK, November 2010. Audio Engineering Society (AES).
[ .pdf ]
M. Geier, J. Ahrens, and S. Spors. Object-based audio reproduction and the audio scene description format. Organized Sound, 15(3):219-227, October 2010. doi:10.1017/S1355771810000324.

M. Geier and S. Spors. Conducting psychoacoustic experiments with the soundscape renderer. In 9.ITG Fachtagung Sprachkommunikation, October 2010.
[ .pdf ]
S. Spors and J. Ahrens. Local sound reproduction by virtual secondary sources. In AES 40th International Conference on Spatial Audio, Tokyo, Japan, October 2010. Audio Engineering Society (AES).
[ .pdf ]
J. Ahrens, H. Wierstorf, and S. Spors. Comparison of higher order ambisonics and wave field synthesis with respect to spatial discretization artifacts in time domain. In AES 40th International Conference on Spatial Audio, Tokyo, Japan, October 2010. Audio Engineering Society (AES).
[ .pdf ]
M. Cobos, J.J. Lopez, and S. Spors. A sparsity-based approach to 3-D binaural sound synthesis using time-frequency array processing. EURASIP Journal on Advances in Signal Processing, 2010:13, 2010. doi:10.1155/2010/415840.
[ Link ]
J. Ahrens and S. Spors. Sound field reproduction using planar and linear arrays of loudspeakers. IEEE Transactions on Audio, Speech and Language Processing, 18(8):2038 - 2050, November 2010. doi:10.1109/TASL.2010.2041106.
[ Link ]
M. Geier, S. Spors, and S. Weizierl. The future of audio reproduction: Technology - Formats - Applications. In M. Detyniecki, U. Leiner, and A. Nürnberger, editors, Adaptive Multimedia Retrieval. Identifying, Summarizing, and Recommending Image and Music, pages 1-17. Springer, 2010.
[ Link ]
R. Schleicher, S. Spors, D. Jahn, and R. Walter. Gaze as a measure of sound source localization. In AES 38th International Conference on Sound Quality Evaluation, June 2010.
[ .pdf ]
S. Spors and J. Ahrens. Analysis and improvement of pre-equalization in 2.5-dimensional Wave Field Synthesis. In 128th AES Convention, London, UK, May 2010. Audio Engineering Society (AES).
[ .pdf ]
J. Ahrens, M. Geier, and S. Spors. Perceptual assessment of delay accuracy and loudspeaker misplacement in Wave Field Synthesis. In 128th AES Convention, London, UK, May 2010. Audio Engineering Society (AES).
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M. Geier, H. Wierstorf, I. Wechsung, and S. Spors. Perceptual evaluation of focused sources in Wave Field Synthesis. In 128th AES Convention, London, UK, May 2010. Audio Engineering Society (AES).
[ .pdf ]
J. Ahrens and S. Spors. Applying the Ambisonics approch on planar and linear arrays of loudspeakers. In Ambisonics Symposium, Paris, France, May 2010.
[ .pdf ]
M. Cobos, J.J. Lopez, and S. Spors. Analysis of room reverberation effects in source localization using small microphone arrays. In Fourth IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, March 2010.

J. Ahrens and S. Spors. An analytical approach to 3D sound field reconstruction employing spherical distributions of non-omnidirectional loudspeakers. In Fourth IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, March 2010.
[ .pdf ]
S. Spors and J. Ahrens. Reproduction of focused sources by the spectral division method. In Fourth IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, March 2010.
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S. Spors, R. Schleicher, D. Jahn, and R. Walter. On the use of eye movements in acoustic source localization experiments. In German Annual Conference on Acoustics (DAGA), March 2010.
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H. Wierstorf, A. Raake, and S. Spors. Die Rolle des Präzedenzeffektes bei der Wahrnehmung von räumlichen Aliasingartefakten bei der Wellenfeldsynthese. In German Annual Conference on Acoustics (DAGA), March 2010.
[ .pdf ]
J. Ahrens, M. Geier, and S. Spors. Perceptual comparison of wave field synthesis implemented with integer and fractional delays. In German Annual Conference on Acoustics (DAGA), March 2010.
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F. Kettler, S. Poschen, A. Raake, and S. Spors. Advanced testing of wideband terminals. In German Annual Conference on Acoustics (DAGA), March 2010.

B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl. Entwurf und Aufbau eines variablen sphärischen Mikrofonarrays für Forschungsanwendungen in Raumakustik und virtual Audio. In German Annual Conference on Acoustics (DAGA), March 2010.

K. Helwani, H. Buchner, and S. Spors. Source-domain adaptive filtering for MIMO systems with application to acoustic echo cancellation. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), March 2010.
[ .pdf ]
J. Ahrens and S. Spors. An analytical approach to 2.5D sound field reproduction employing linear distributions of non-omnidirectional loudspeakers. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), March 2010.
[ .pdf ]
2009
J. Ahrens and S. Spors. Artifacts in the sound field of a moving sound source reconstructed from a microphone array recording. In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, New Paltz, USA, October 2009.
[ .pdf ]
A. Raake, M. Wältermann, and S. Spors. Which wideband speech codec? quality impact due to room-acoustics at send side and presentation method. In 127th AES Convention, New York, USA, October 2009. Audio Engineering Society (AES).
[ .pdf ]
S. Spors, H. Wierstorf, M. Geier, and J. Ahrens. Physical and perceptual properties of focused sources in wave field synthesis. In 127th AES Convention. Audio Engineering Society (AES), October 2009.
[ .pdf ]
J. Ahrens and S. Spors. On the secondary source type mismatch in wave field synthesis employing circular distributions of loudspeakers. In 127th AES Convention, New York, USA, October 2009. Audio Engineering Society (AES).
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S. Spors, H. Buchner, and K. Helwani. Block-based multichannel transform-domain adaptive filtering. In European Signal Processing Conference (EUSIPCO), Glasgow, UK, August 2009.
[ .pdf ]
J. Ahrens and S. Spors. An analytical approach to 2.5D sound field reproduction employing circular distributions of non-omnidirectional loudspeakers. In European Signal Processing Conference (EUSIPCO), Glasgow, UK, August 2009.
[ .pdf ]
P. Annibale, R. Rabenstein, S. Spors, and P. Steffen. A short review of signals and systems for spatial audio. In European Signal Processing Conference (EUSIPCO), Glasgow, UK, August 2009.
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J. Ahrens and S. Spors. Spatial encoding and decoding of focused virtual sound sources. In Ambisonics Symposium, Graz, Austria, June 2009.
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S. Spors and J. Ahrens. Spatial aliasing artifacts of wave field synthesis for the reproduction of virtual point sources. In 126th AES Convention, Munich, Germany, May 2009. Audio Engineering Society (AES).
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J. Ahrens and S. Spors. Sound field reproduction employing non-omnidirectional loudspeakers. In 126th AES Convention, Munich, Germany, May 2009. Audio Engineering Society (AES).
[ .pdf ]
J. Ahrens and S. Spors. Alterations of the temporal spectrum in high-resolution sound field reproduction of different spatial bandwidths. In 126th AES Convention, Munich, Germany, May 2009. Audio Engineering Society (AES).
[ .pdf ]
J. Ahrens and S. Spors. An analytical approach to sound field reproduction with a movable sweet spot using circular distributions of loudspeakers. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Taipei, Taiwan, April 2009.
[ .pdf ]
J. Ahrens and S. Spors. Timbral coloration in high resolution sound field reproduction due to spatial bandwidth limitation. In NAG-DAGA International Conference on Acoustics, Rotterdam, The Netherlands, March 2009.
[ .pdf ]
S. Spors and J. Ahrens. Spatial sampling artifacts of focused sources in wave field synthesis. In NAG-DAGA International Conference on Acoustics, Rotterdam, The Netherlands, March 2009.
[ .pdf ]
M. Geier, J. Ahrens, and S. Spors. Binaural monitoring of massive multichannel sound reproduction systems using model-based rendering. In NAG-DAGA International Conference on Acoustics, Rotterdam, The Netherlands, March 2009.
[ .pdf ]
2008
J. Ahrens and S. Spors. An analytical approach to sound field reproduction using circular and spherical loudspeaker distributions. Acta Acoustica united with Acoustica, 94(6):988-999, December 2008.

H. Buchner and S. Spors. A general derivation of wave-domain adaptive filtering and application to acoustic echo cancellation. In Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, USA, October 2008.
[ .pdf ]
S. Spors and J. Ahrens. A comparison of wave field synthesis and higher-order ambisonics with respect to physical properties and spatial sampling. In 125th AES Convention, San Fransisco, USA, October 2008. Audio Engineering Society (AES).
[ .pdf ]
J. Ahrens and S. Spors. Reproduction of virtual sound sources moving at supersonic speeds in wave field synthesis. In 125th AES Convention, San Fransisco, USA, October 2008. Audio Engineering Society (AES).
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S. Spors and H. Buchner. Multichannel transform domain adaptive filtering: A two stage approach and illustration for acoustic echo cancellation. In 11th International Workshop on Acoustic Echo and Noise Control (IWAENC), Seattle, USA, September 2008.
[ .pdf ]
S. Poschen, F. Kettler, A. Raake, and S. Spors. Wideband echo perception. In 11th International Workshop on Acoustic Echo and Noise Control (IWAENC), Seattle, USA, September 2008.

H.W. Gierlich, S. Poschen, F. Kettler, A. Raake, S. Spors, and M. Geier. Echo perception in wideband telecommunication scenarios - comparison to E-models narrowband echo findings. In ITU-T workshop on 'From Speech to Audio: bandwidth extension, binaural perception', Lannion, France, September 2008.

H.W. Gierlich, S. Poschen, F. Kettler, A. Raake, and S. Spors. Optimum frequency response characteristics for wideband terminals. In ITU-T workshop on 'From Speech to Audio: bandwidth extension, binaural perception', Lannion, France, September 2008.

M. Geier and S. Spors. ASDF: Audio scene description format. In International Computer Music Conference (ICMC), Belfast, Ireland, August 2008.
[ .pdf ]
T. Schaefers, M. Rohs, S. Spors, A. Raake, and J. Ahrens. Designing low-dimensional interaction for mobile navigation in 3D audio spaces. In 34th International AES Conference, Jeju Island, Korea, August 2008. Audio Engineering Society (AES).
[ .pdf ]
S. Spors, H. Buchner, and R. Rabenstein. Spatio-temporal adaptive inverse filtering in the wave domain. In E. Haensler and G. Schmidt, editors, Speech and Audio Processing in Adverse Environments, pages 551-583. Springer, 2008.

J. Ahrens and S. Spors. Notes on the reproduction of moving virtual sound sources. In Acoustics'08, Paris, France, July 2008.

S. Spors and J. Ahrens. Towards a theory for arbitrarily shaped sound field reproduction systems. In Acoustics'08, Paris, France, July 2008.

K. Bredies, N.A. Mann, J. Ahrens, M. Geier, S. Spors, and M. Nischt. The multi-touch soundscape renderer. In 9th International Working Conference on Advanced Visual Interfaces, Napoli, Italy, May 2008.
[ .pdf ]
J. Ahrens and S. Spors. Reproduction of moving virtual sound sources with special attention to the doppler effect. In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ .pdf ]
J. Ahrens and S. Spors. Focusing of virtual sound sources in higher order ambisonics. In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ .pdf ]
S. Spors, R. Rabenstein, and J. Ahrens. The theory of wave field synthesis revisited. In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ .pdf ]
M. Geier, J. Ahrens, and S. Spors. The SoundScape renderer: A unified spatial audio reproduction framework for arbitrary rendering methods. In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ .pdf ]
J. Hannemann, C.A. Leedy, K.D. Donohue, S. Spors, and A. Raake. A comparative study of perceptual quality between wavefield synthesis and multipole-matched rendering for spatial audio. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), April 2008.

J. Ahrens and S. Spors. Analytical driving functions for higher-order ambisonics. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), April 2008.
[ .pdf ]
J. Ahrens and S. Spors. Notes on rendering of focused directional sound sources in wave field synthesis. In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[ .pdf ]
S. Spors. Investigation of spatial aliasing artifacts of wave field synthesis in the temporal domain. In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[ .pdf ]
M. Geier, J. Ahrens, and S. Spors. ASDF: Ein XML Format zur Beschreibung von virtuellen 3D-Audioszenen. In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[ .pdf ]
A. Raake, S. Spors, H.-J. Maempel, T. Marszalek, S. Ciba, and N. Cote. Speech quality of wide- and narrowband codecs: Object- and subject oriented view. In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[.pdf ]
S. Poschen, F. Kettler, A. Raake, and S. Spors. Testing wideband terminals. In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.

J. Ahrens and S. Spors. Reproduction of a plane-wave sound field using planar and linear arrays of loudspeakers. In Third IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, March 2008.
[ .pdf ]
S. Spors and H. Buchner. Efficient massive multichannel active noise control using wave-domain adaptive filtering. In Third IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, March 2008.
[ .pdf ]
2007


J. Ahrens and S. Spors. Rendering of virtual sound sources with arbitrary directivity in higher order ambisonics. In 123th AES Convention, New York, USA, October 2007. Audio Engineering Society (AES).
[ .pdf ]
S. Spors. Extension of an analytic secondary source selection criterion for wave field synthesis. In 123th AES Convention, New York, USA, October 2007. Audio Engineering Society (AES).
[ .pdf ]
S. Spors and H. Buchner. An approach to massive multichannel broadband feedforward active noise control using wave-domain adaptive filtering. In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, New Paltz, USA, October 2007.
[ .pdf ]
J. Ahrens and S. Spors. Implementation of directional sources in wave field synthesis. In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, New Paltz, USA, October 2007.
[ .pdf ]
S. Spors. Comparison of higher-order ambisonics and wave field synthesis with respect to spatial aliasing artifacts. In 19th International Congress on Acoustics, Madrid, Spain, September 2007.
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M. Geier, J. Ahrens, A. Möhl, S. Spors, J. Loh, and K. Bredies. The SoundScape renderer: A versatile framework for spatial audio reproduction. In Proceedings of the DEGA WFS Symposium, Ilmenau, Germany, September 2007. Deutsche Gesellschaft für Akustik (DEGA).
[ .pdf ]
A. Raake, S. Spors, J. Ahrens, and J. Ajmera. Concept and evaluation of a downward-compatible system for spatial teleconferencing using automatic speaker clustering. In Interspeech 2007 - ICSLP, Antwerp, Belgium, August 2007.
[ .pdf ]
S. Spors and J. Ahrens. Analysis of near-field effects of wave field synthesis using linear loudspeaker arrays. In 30th International AES Conference, Saariselkä, Finland, March 2007. Audio Engineering Society (AES).
[ .pdf ]
S. Spors. An analytic secondary source selection criteria for wave field synthesis. In 33rd German Annual Conference on Acoustics (DAGA), Stuttgart, Germany, March 2007.
[ .pdf ]
J. Ahrens, A. Raake, S. Spors, and J. Ajmera. Ein rückwärtskompatibles räumliches Telefonferenzsystem mit automatischer Sprechergruppierung. In 33rd German Annual Conference on Acoustics (DAGA), Stuttgart, Germany, March 2007.
[ .pdf ]
R. Rabenstein and S. Spors. Sound field reproduction. In J. Benesty, M. Sondhi, and Y. Huang, editors, Springer Handbook on Speech Processing, chapter 53. Springer, 2007.

S. Spors, R. Rabenstein, H. Buchner, and W. Herbordt. Active listening room compensation for massive multichannel sound reproduction systems using wave-domain adaptive filtering. Journal of the Acoustical Society of America (JASA), 122(1):354-369, 2007.

2006
S. Spors, H. Buchner, and R. Rabenstein. Eigenspace adaptive filtering for efficient pre-equalization of acoustic MIMO systems. In European Signal Processing Conference (EUSIPCO), Florence, Italy, September 2006.
[ .pdf ]
S. Spors and R. Rabenstein. Evaluation of the circular harmonics decomposition for WDAF-based active listening room compensation. In 28th AES Conference: The Future of Audio Technology - Surround and Beyond, pages 134-149, Pitea, Sweden, June 2006. Audio Engineering Society (AES).
[ .pdf ]
S. Spors and R. Rabenstein. Spatial aliasing artifacts produced by linear and circular loudspeaker arrays used for wave field synthesis. In 120th AES Convention, Paris, France, May 2006. Audio Engineering Society (AES).
[ .pdf ]
S. Spors. Spatial aliasing artifacts produced by linear loudspeaker arrays used for wave field synthesis. In Second IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, Marrakech, Morocco, March 2006.
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R.Rabenstein and S. Spors. Signal processing for spatial sound reproduction with wave field synthesis. In 8th International Conference and Exhibition on Digital Signal Processing and its Applications, Moscow, Russia, March 2006.
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S. Spors. Active Listening Room Compensation for Spatial Sound Reproduction Systems. PhD thesis, University of Erlangen-Nuremberg, 2006.

R. Rabenstein, P. Steffen, and S. Spors. Representation of two-dimensional wave fields by multidimensional signals. EURASIP Signal Processing Magazine, 86(6):1341-1351, 2006.

R. Rabenstein and S. Spors. Wave field synthesis techniques for spatial sound reproduction. In E. Haensler and G. Schmidt, editors, Topics in Acoustic Echo and Noise Control, chapter 13, pages 517-545. Springer, 2006.

2005
R. Rabenstein and S. Spors. Spatial sound reproduction with wave field synthesis. In Annual Meeting of the AES Italian Section, Como, Italy, November 2005.

R. Rabenstein, P. Steffen, and S. Spors. A tutorial on the representation of two-dimensional wave fields by multidimensional signals. In 4th International Workshop on (ND) Multidimensional Systems, Wuppertal, Germany, July 2005.

S. Spors, M. Renk, and R. Rabenstein. Limiting effects of active room compensation using wave field synthesis. In 118th AES Convention, Barcelona, Spain, May 2005. Audio Engineering Society (AES).

M. Krinidis, G. Stamou, H. Teutsch, S. Spors, N. Nikolaidis, R. Rabenstein, and I. Pitas. An audio-visual database for evaluating person tracking algorithms. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2005.

S. Spors, D. Seuberth, and R. Rabenstein. Multiexciter panel compensation for wave field synthesis. In 31st German Annual Conference on Acoustics (DAGA), 2005.

W. Herbordt, S. Nakamura, S. Spors, H. Buchner, and W. Kellermann. Wave field cancellation using wave-domain adaptive filtering. In Hand-Free Speech Communication and Microphone Arrays, New Jersey, USA, 2005.

S. Petrausch, S. Spors, and R. Rabenstein. Simulation and visualization of room compensation for wave field synthesis with the functional transformation method. In 119th AES Convention, New York, USA, 2005. Audio Engineering Society (AES).

2004
S. Spors, H. Teutsch, A. Kuntz, and R. Rabenstein. Sound field synthesis. In Y.Huang and J.Benesty, editors, Audio Signal Processing for Next-Generation Multimedia Communication Systems. Kluwer Academic Publishers, 2004.

A. Kuntz, S. Spors, and H. Teutsch. Die akustische Mensch-Maschine-Schnittstelle. Elektronik, 8:60-65, 2004.

H. Buchner, S. Spors, and W. Kellermann. Wave-domain adaptive filtering: Acoustic echo cancellation for full-duplex systems based on wave-field synthesis. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Montreal, Canada, 2004.

S. Spors, H. Buchner, and R. Rabenstein. A novel approach to active listening room compensation for wave field synthesis using wave-domain adaptive filtering. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Montreal, Canada, 2004.

H. Buchner, S. Spors, and W. Kellermann. Wave-domain adaptive filtering for acoustic human-machine interfaces based on wavefield analysis and synthesis. In European Signal Processing Conference (EUSIPCO), 2004.

S. Spors, H. Buchner, and R. Rabenstein. Adaptive listening room compensation for spatial audio systems. In European Signal Processing Conference (EUSIPCO), 2004.

H. Buchner, S. Spors, and W. Kellermann. Full-duplex systems for sound field recording and auralization based on Wave Field Synthesis. In 116th AES Convention, Berlin, Germany, 2004. Audio Engineering Society (AES).

S. Spors, H. Buchner, and R. Rabenstein. Efficient active listening room compensation for Wave Field Synthesis. In 116th AES Convention, Berlin, Germany, 2004. Audio Engineering Society (AES).

2003
H. Teutsch, S. Spors, W. Herbordt, W. Kellermann, and R. Rabenstein. An integrated real-time system for immersive audio applications. In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, New Paltz, USA, October 2003.

W. Herbordt, H. Buchner, W. Kellermann, R. Rabenstein, S. Spors, and H. Teutsch. Full-duplex multichannel communication: Real-time implementations in a general framework. In IEEE International Conference on Multimedia and Expo (ICME), pages 49-52, Baltimore, USA, July 2003.

S. Spors, A. Kuntz, and R. Rabenstein. Listening room compensation for wave field synthesis. In IEEE International Conference on Multimedia and Expo (ICME), pages 725-728, Baltimore, USA, July 2003.

S. Spors, A. Kuntz, and R. Rabenstein. An approach to listening room compensation with wave field synthesis. In AES 24th International Conference on Multichannel Audio, pages 49-52, Banff, Canada, June 2003. Audio Engineering Society (AES).

H. Buchner, S. Spors, W. Herbordt, and W. Kellermann. Vorrichtung und Verfahren zum Verarbeiten eines akustischen Eingangssignals. Patent DE10351793, 2003.

H. Buchner, S. Spors, W. Herbordt, and W. Kellermann. Device and Method for Processing an Input Signal. PCT WO 2005/046194 A1, 2003.

H. Buchner, S. Spors, W. Herbordt, and W. Kellermann. Vorrichtung und Verfahren zum Verarbeiten eines Eingangssignals. Patent DE10362073, 2003.

2002
R. Rabenstein, H. Teutsch, H. Buchner, W. Herbordt, F. Küch, S. Spors, and L. Trautmann. Raumklangwiedergabe und der MPEG-4 Standard: Das CARROUSO-Projekt. In 22. Tonmeistertagung, Verband Deutscher Tonmeister (VDT), Hannover, November 2002.

S. Spors and R. Rabenstein. A multidimensional state-space approach for the numerical simulation of sound propagation in enclosures. In XI European Signal Processing Conference (EUSIPCO), Toulouse, France, September 2002.

H. Buchner and S. Spors. Full-duplex communication systems using loudspeaker arrays and microphone arrays. In IEEE International Conference on Multimedia and Expo (ICME), Lousanne, Swisse, August 2002.

S. Spors, H. Teutsch, and R. Rabenstein. High-quality acoustic rendering with wave field synthesis. In Vision, Modelling and Visualization (VMV), pages 101-108, November 2002.
2001
S. Spors, R. Rabenstein, and N. Strobel. A multi-sensor object localization system. In Vision, Modelling and Visualization (VMV), pages 19-26, November 2001.

S. Spors, R. Rabenstein, and N. Strobel. Joint audio-video object tracking. In IEEE International Conference on Image Processing (ICIP), Greece, Thessaloniki, October 2001.

S. Spors and R. Rabenstein. Virtual acoustics by numerical simulation. In 46th International Scientific Colloquium, pages 195-196, Ilmenau, Germany, September 2001.

S. Spors and R. Rabenstein. A real-time face tracker for color video. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), USA, Salt Lake City, May 2001.

N. Strobel, S. Spors, and R. Rabenstein. Joint audio-video signal processing for object localization and tracking. In M. Brandstein and D. Ward, editors, Microphone Arrays, chapter 10, pages 203-225. Springer, 2001.

N. Strobel, S. Spors, and R. Rabenstein. Joint audio-video object localization and tracking. IEEE Signal Processing Magazine, 18(1):22-31, January 2001.

S. Spors and R. Rabenstein. Characterization of acoustical environments by numerical simulation. In 7th International Workshop on Acoustic Echo and Noise Control (IWAENC), pages 195-198, Darmstadt, Germany, 2001.

2000
G. Wang, R. Rabenstein, N. Strobel, and S. Spors. Object localization by joint audio-video signal processing. In Vision Modelling and Visualization, pages 97-104, 2000.

N. Strobel, S. Spors, and R. Rabenstein. Joint audio-video object localization using a recursive multi-state multi-sensor estimator. In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), pages 3781-3784, 2000.

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