High quality audio conferencing with adaptive beamforming

Details High quality audio conferencing with adaptive beamforming High quality audio conferencing with adaptive beamforming

2007-03-13

2007-03-13

Tieu, Benny Quoc (Department: 2614)

Telephonic communications

Special services

Conferencing

C704S226000, C381S094200, C379S406090

Reexamination Certificate

active

10697670

ABSTRACT:
Systems and methods that enable high quality audio teleconferencing are disclosed. In one embodiment of the present invention, a signal processor receives signals from a spatially dispersed set of directional microphones, processing the microphone signals and the far-end received audio into a signal for transmission to a far-end party. The processing may comprise the use of one or more algorithms that reduce conference room noise and may selectively increase participant audio levels by processing the microphone signals using beamforming techniques. An embodiment of the present invention may also comprise one or more omni-directional microphones that may be used in cooperation with the directional microphones to adjust for background noise, acoustic echo, and the existence of side conversations.

REFERENCES:
patent: 6192134 (2001-02-01), White et al.
patent: 2004/0125942 (2004-07-01), Beaucoup et al.
Thomas Magesacher and Tomas Nordstrom, “Splitting The Least-Mean-Square Algorithm”, Norsig-2000, 5thNordic Signal Processing Symposium, Oct. 4-7, 2002, available at <http://www.norsig.no
orsig2002/Proceedings/papers/cr1100.pdf>.
Bernard Widrow, Robert C. Goodlin et al., “Adaptive Noise Cancelling: Principles and Applications Using Normalized Least Mean Square (NLMS) Algorithm”, Proceedings of the IEEE, vol. 63, pp. 1692-1716, Dec. 1975.
“Acoustic Echo Cancellers: The Algorithm”, May 15, 2003, available as of Nov. 9, 2006 at <http://www.esat, kuleuven.ac.be/˜rombouts/demo/aec.html>, pp. 1-13.
“Demo Beamforming”, Koen Eneman, available as of May 15, 2003 at <http://www.esat.kuleuven.ac.be/˜eneman/demo—beam/demo—beam.html>, pp. 1-9.
Man Mohan Sondhi, “Adaptive Echo Cancellation For Voice Signals”, Center For Advanced Information Processing (CAIP), Rutgers University, Piscataway, NJ, presented at CAIP Dec. 3, 2002, pp. 1-40.
M. Brandstein and D. Ward (EDS.), “Microphone Arrays: Signal Processing Techniques and Applications”, Springer-Verlag, New York 2001.

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