Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Reexamination Certificate
2006-08-22
2006-08-22
Knepper, David D. (Department: 2654)
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
C704S205000
Reexamination Certificate
active
07096182
ABSTRACT:
In order to enhance the quality of a communication signal derived from speech and noise, a filter divides the communication signal into a plurality of frequency band signals. A calculator generates a plurality of power band signals each having a power band value and corresponding to one of the frequency band signals. The power band values are based on estimating, over a time period, the power of one of the frequency band signals. The time period is different for different ones of the frequency band signals. The power band values are used to calculate weighting factors which are used to alter the frequency band signals that are combined to generate an improved communication signal.
REFERENCES:
patent: 4351983 (1982-09-01), Crouse et al.
patent: 4361813 (1982-11-01), Watatani
patent: 4630305 (1986-12-01), Borth et al.
patent: 5301205 (1994-04-01), Tsutsui et al.
patent: 5583967 (1996-12-01), Akagiri
patent: 5684920 (1997-11-01), Iwakami et al.
patent: 6023674 (2000-02-01), Mekuria
patent: 6108610 (2000-08-01), Winn
patent: 6427134 (2002-07-01), Garner et al.
patent: 6529868 (2003-03-01), Chandran et al.
IEEE Transactions on Acoustics, Speech and Signal Processing, vol. 28, No. 2, Apr. 1980, pp. 137-145, “Speech Enhancement Using a Soft-Decision Noise Suppression Filter,” Robert J. McAulay and Marilyn L. Malpass.
IEEE Conference on Acoustics, Speech and Signal Processing, Apr. 1979, pp. 208-211, “Enhancement of Speech Corrupted by Acoustic Noise,” M. Berouti, R. Schwartz and J. Makhoul.
Advanced Signal Processing and Digital Noise Reduction, 1996, Chapter 9, pp. 242-260, Saeed V. Vaseghi (ISBN Wiley 0471958751).
Proceedings of the IEEE, vol. 67, No. 12, Dec. 1979, pp. 1586-1604, “Enhancement and Bandwidth Compression of Noisy Speech,” Jake S. Lim and Alan V. Oppenheim.
Chandran Ravi
Dunne Bruce E.
Marchok Daniel J.
Knepper David D.
Tellabs Operations Inc.
LandOfFree
Communication system noise cancellation power signal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Communication system noise cancellation power signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communication system noise cancellation power signal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3709595