Communication system noise cancellation power signal...

Details Communication system noise cancellation power signal... Communication system noise cancellation power signal...

2006-06-28

2008-09-09

Knepper, David D (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

Reexamination Certificate

active

07424424

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: 7058572 (2006-06-01), Nemer
patent: 7096182 (2006-08-01), Chandran et al.
patent: 2003/0040908 (2003-02-01), Yang et al.
patent: 2006/0229869 (2006-10-01), Nemer

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