Suppression system of background noise of speech signals and...

Details Suppression system of background noise of speech signals and... Suppression system of background noise of speech signals and...

2005-08-30

2005-08-30

{hacek over (S)}mits, Tālivaldis Ivars (Department: 2655)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S207000, C704S226000

Reexamination Certificate

active

06937978

ABSTRACT:
A suppression system of background noise of speech signals uses an adaptive filter of long-time and short-time statistical characteristics of the speech signals. Since the statistical characteristics of the speech signals vary with time, the associated coefficents of the filter also have to be adjusted according to the varitation of the speech signals to eliminate the unnecessary background noise. High frequency attenuation of the speech signals is compensated for by passing the signal through a high frequency booster to elevate the degree of brightness of the speech signals and to improve their quality.

REFERENCES:
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patent: 6104994 (2000-08-01), Su et al.
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patent: 6711538 (2004-03-01), Omori et al.

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