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diff --git a/libAACdec/src/aacdec_pns.h b/libAACdec/src/aacdec_pns.h
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+++ b/libAACdec/src/aacdec_pns.h
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+/*****************************  MPEG-4 AAC Decoder  **************************
+
+                        (C) Copyright Fraunhofer IIS (2004)
+                               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.
+
+
+   $Id$
+   Author(s):   Josef Hoepfl
+   Description: perceptual noise substitution tool
+
+   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.
+
+******************************************************************************/
+
+#ifndef PNS_H
+#define PNS_H
+
+#include "common_fix.h"
+
+
+#define NO_OFBANDS ((8*16))
+
+typedef struct {
+  UCHAR correlated[NO_OFBANDS];
+} CPnsInterChannelData;
+
+typedef struct {
+  CPnsInterChannelData *pPnsInterChannelData;
+  UCHAR  pnsUsed[NO_OFBANDS];
+  int    CurrentEnergy;
+  UCHAR  PnsActive;
+  INT   *currentSeed;
+  INT   *randomSeed;
+} CPnsData;
+
+void CPns_InitPns ( CPnsData *pPnsData,
+                    CPnsInterChannelData *pPnsInterChannelData,
+                    INT* currentSeed,
+                    INT* randomSeed );
+
+void CPns_ResetData ( CPnsData *pPnsData, CPnsInterChannelData *pPnsInterChannelData );
+
+
+#endif /* #ifndef PNS_H */