Noise suppression device including subband-based...

Details Noise suppression device including subband-based... Noise suppression device including subband-based...

2008-03-25

2008-03-25

Harper, V. Paul (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S225000, C704S233000, C381S094300

Reexamination Certificate

active

07349841

ABSTRACT:
A noise suppression device calculates a subband SN ratio calculation based on a noise likeness signal, an input signal spectrum and a subband-based estimated noise spectrum. The device calculates a subband-based input signal average spectrum, calculates a subband-based mixture ratio of the subband-based estimated noise spectrum to the subband-based input signal average spectrum on the basis of the noise likeness signal, and calculates the subband-based SN ratio on the basis of the subband-based estimated noise spectrum, the subband-based input signal average spectrum and the mixture ratio.

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