[xiph-commits] r11915 - trunk/speex/libspeex

[jm at svn.xiph.org]

Author: jm
Date: 2006-10-11 07:22:11 -0700 (Wed, 11 Oct 2006)
New Revision: 11915

Modified:
   trunk/speex/libspeex/preprocess.c
Log:
Some references for the black magic


Modified: trunk/speex/libspeex/preprocess.c
===================================================================
--- trunk/speex/libspeex/preprocess.c	2006-10-11 14:03:59 UTC (rev 11914)
+++ trunk/speex/libspeex/preprocess.c	2006-10-11 14:22:11 UTC (rev 11915)
@@ -1,6 +1,6 @@
-/* Copyright (C) 2003 Epic Games 
-   Written by Jean-Marc Valin
-
+/* Copyright (C) 2003 Epic Games (written by Jean-Marc Valin)
+   Copyright (C) 2004-2006 Epic Games 
+   
    File: preprocess.c
    Preprocessor with denoising based on the algorithm by Ephraim and Malah
 
@@ -31,6 +31,30 @@
    POSSIBILITY OF SUCH DAMAGE.
 */
 
+
+/*
+   Recommended papers:
+   
+   Y. Ephraim and D. Malah, "Speech enhancement using minimum mean-square error
+   short-time spectral amplitude estimator". IEEE Transactions on Acoustics, 
+   Speech and Signal Processing, vol. ASSP-32, no. 6, pp. 1109-1121, 1984.
+   
+   Y. Ephraim and D. Malah, "Speech enhancement using minimum mean-square error
+   log-spectral amplitude estimator". IEEE Transactions on Acoustics, Speech and 
+   Signal Processing, vol. ASSP-33, no. 2, pp. 443-445, 1985.
+   
+   I. Cohen and B. Berdugo, "Speech enhancement for non-stationary noise environments".
+   Signal Processing, vol. 81, no. 2, pp. 2403-2418, 2001.
+
+   Stefan Gustafsson, Rainer Martin, Peter Jax, and Peter Vary. "A psychoacoustic 
+   approach to combined acoustic echo cancellation and noise reduction". IEEE 
+   Transactions on Speech and Audio Processing, 2002.
+   
+   J.-M. Valin, J. Rouat, and F. Michaud, "Microphone array post-filter for separation
+   of simultaneous non-stationary sources". In Proceedings IEEE International 
+   Conference on Acoustics, Speech, and Signal Processing, 2004.
+*/
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif