06445801 is referenced by 20 patents and cites 1 patents.

The disclosed method uses the Wiener frequency filtering to suppress noise in noisy sound signals (u(t)). This method includes a preliminary step in which the sound signals (u(t)) to be noise-suppressed are digitized by sampling and subdivided into frames. The method then includes a first series of steps including the creation of a noise model on N frames, the estimating of the spectral density of the noise and of the energy of the noise model and the computing of a coefficient that reflects the statistical dispersion of the noise. It also includes a second series of steps including the computation of the spectral density of the signals to be noise-suppressed fore each frame. The coefficients of the Wiener filter are modified for each successively processed frame, by the parameters determined at the end of the two series of steps, so as to introduce an energy compensation and an adaptive overestimation of the noise.

Title
Method of frequency filtering applied to noise suppression in signals implementing a wiener filter
Application Number
9/196138
Publication Number
6445801 (B1)
Application Date
November 20, 1998
Publication Date
September 3, 2002
Inventor
Pierre Albert Breton
Pessac
US
Gérard Reynaud
Bordeaux
US
Dominique Pastor
Hengelo
US
Agent
Oblon Spivak McClelland Maier & Neustadt P C
US
Assignee
Sextant Avionique
US
IPC
H04B 15/00
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