[speex-dev] reduction of noise due to high microphone gain

Allen Drennan adrennan at wiredred.com
Sun Aug 31 20:00:07 PDT 2003

Glad to hear it will become an option/fixed.  I pointed this same issue out
months ago before we integrated Speex.

-----Original Message-----
From: owner-speex-dev at xiph.org [mailto:owner-speex-dev at xiph.org] On Behalf
Of Jean-Marc Valin
Sent: Sunday, August 31, 2003 5:55 PM
To: speex
Subject: RE: [speex-dev] reduction of noise due to high microphone gain

Le dim 31/08/2003 à 20:12, Daniel Vogel a écrit :
> > This works really well for white noise reduction.  However 
> > what I've noticed was the amplitudes of normal speech samples 
> > also get reduced.
> Noticed this as well recently.

This is probably due to the AGC (Adaptive Gain Control) that's
integrated with the denoiser. I'll try adding an option to control that.


Jean-Marc Valin, M.Sc.A., ing. jr.
LABORIUS (http://www.gel.usherb.ca/laborius)
Université de Sherbrooke, Québec, Canada

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