Method and apparatus for noise filtering

Details Method and apparatus for noise filtering Method and apparatus for noise filtering

2006-09-19

2006-09-19

Abebe, Daniel (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S200000

Reexamination Certificate

active

07110944

ABSTRACT:
A method of filtering noise from a mixed sound signal to obtain a filtered target signal, includes inputting the mixed signal through a plurality of sensors into a plurality of channels, separately Fourier transforming each the mixed signal into the frequency domain, computing a signal short-time spectral amplitude |Ŝ| from the transformed signals, computing a signal short-time spectral complex exponential ei arg(S)from said transformed signals, where arg(S) is the phase of the target signal in the frequency domain, computing said target signal S in the frequency domain from said spectral amplitude and said complex exponential, and computing a spectral power matrix and using the spectral power matrix to compute the spectral amplitude and the spectral complex exponential.

REFERENCES:
patent: 6122610 (2000-09-01), Isabelle
patent: 6359923 (2002-03-01), Agee et al.
patent: 6480522 (2002-11-01), Hoole et al.
patent: 6772182 (2004-08-01), McDonald et al.

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