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diff --git a/libAACenc/src/aacenc_pns.h b/libAACenc/src/aacenc_pns.h
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+++ b/libAACenc/src/aacenc_pns.h
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+/******************************** MPEG Audio Encoder **************************
+
+                     (C) Copyright Fraunhofer IIS (2001)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+   $Id$
+
+   Initial author:       M. Lohwasser
+   contents/description: pns.h
+
+******************************************************************************/
+
+#ifndef __PNS_H
+#define __PNS_H
+
+#include "common_fix.h"
+
+#include "pnsparam.h"
+
+#define NO_NOISE_PNS FDK_INT_MIN
+
+typedef struct{
+  NOISEPARAMS np;
+  FIXP_DBL minCorrelationEnergy;
+  FIXP_DBL noiseCorrelationThresh;
+  INT      usePns;
+} PNS_CONFIG;
+
+typedef struct{
+  FIXP_SGL noiseFuzzyMeasure[MAX_GROUPED_SFB];
+  FIXP_DBL noiseEnergyCorrelation[MAX_GROUPED_SFB];
+  INT      pnsFlag[MAX_GROUPED_SFB];
+} PNS_DATA;
+
+#endif