Microphone non-uniformity compensation system

Electrical audio signal processing systems and devices – Directive circuits for microphones

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C381S091000, C381S122000

Reexamination Certificate

active

08064617

ABSTRACT:
A microphone compensation system responds to changes in the characteristics of individual microphones in an array of microphones. The microphone compensation system provides a communication system with consistent performance despite microphone aging, widely varying environmental conditions, and other factors that alter the characteristics of the microphones. Furthermore, lengthy, complex, and costly measurement and analysis phases for determining initial settings for filters in the communication system are eliminated.

REFERENCES:
patent: 5602962 (1997-02-01), Kellermann
patent: 2005/0276423 (2005-12-01), Aubauer et al.
patent: 43 30 243 (1993-03-01), None
patent: 199 34 724 (2001-04-01), None
patent: WO 01/10169 (2001-02-01), None
W. Herbordt and W. Kellermann “Analysis of blocking matrices for generalized sidelobe cancellers for non-stationary broadband signals” Student Forum of International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Telecommunications Laboratory, University of Erlangen-Nuremberg, Germany, May 1, 2002.
“Microphone Arrays—Signal Processing Techniques and Applications”, M. Brandstein et al. (Eds.), copyright Springer-Verlag, 2001, pp. 3-106 and 229-349.
Gannot, Sharon et al, “Signal Enhancement Using Beamforming and Nonstationarity With Applications to Speech”,IEEE Transactions On Signal Processing, vol. 49, No. 8, 2001, pp. 1614-1626.
Griffiths, Lloyd J. et al, “An Alternative Approach to Linearly Constrained Adaptive Beamforming”,IEEE Transactions On Antennas and Propagation, vol. AP-30, No. 1, 1982, pp. 27-34.
Herbordt, Wolfgang et al., “Adaptive Beamforming for Audio Signal Acquisition”, Adaptive Signal Processing, Applications to Real-World Problems, J. Benesty et al. (Eds.), copyright 2003, Chapter 6, pp. 155-194.
Herbordt, W. et al., “Analysis of Blocking Matrices for Generalized Sidelobe Cancellers for non-Stationary Broadband Signals”,Student Forum of Int. Conference On Acoustics, Speech and Signal Processing, May 2002, retrieved from the Internet at: <URL:http://www.int.de/LMS/publications/web/Int2002—007.pdf>, 4 pages.
Herbordt, Wolfgang et al., “Frequency-Domain Integration of Acoustic Echo Cancellation and a Generalized Sidelobe Canceller with Improved Robustness”,European Translations on Telecommunications, vol. 13, No. 2, retrieved from the Internet at: <URL:http://www.Int.de/LMS/publications/web/Int2002—006>.pdf, pp. 1-10.
Hoshuyana, Osamu et al., “A Robust Adaptive Beamformer for Microphone Arrays with a Blocking Matrix Using Constrained Adaptive Filters”,IEEE Transactions On Signal Processing, vol. 47, No. 10, 1999, pp. 2677-2684.
McCowan, Iain A. et al, “Adaptive Parameter Compensation for Robust Hands-Free Speech Recognition Using a Dual Beamforming Microphone Array”,Proceeding of 2001 International Symposium On Intelligent Multimedia, Video and Speech Processing, 2001, pp. 547-550.
Oh, Stephen et al, “Hands-Free Voice Communication in an Automobile With a Microphone Array”,IEEE Digital Signal Processing, vol. 5, 1992, pp. I-281 to I-284.
Van Veen, Barry D. et al, “Beamforming: A Versatile Approach to Spatial Filtering”,IEEE ASSP Magazine, 1988, pp. 4-24.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Microphone non-uniformity compensation system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microphone non-uniformity compensation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microphone non-uniformity compensation system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4281519

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.