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diff --git a/libAACenc/src/tns_func.h b/libAACenc/src/tns_func.h
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+/******************************** MPEG Audio Encoder **************************
+
+                     (C) Copyright Fraunhofer IIS (1999)
+                               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:       Alex Goeschel
+   contents/description: Temporal noise shaping
+
+******************************************************************************/
+#ifndef _TNS_FUNC_H
+#define _TNS_FUNC_H
+
+#include "common_fix.h"
+
+#include "psy_configuration.h"
+
+AAC_ENCODER_ERROR FDKaacEnc_InitTnsConfiguration(INT bitrate,
+                         INT samplerate,
+                         INT channels,
+                         INT blocktype,
+                         INT granuleLength,
+                         INT ldSbrPresent,
+                         TNS_CONFIG *tnsConfig,
+                         PSY_CONFIGURATION *psyConfig,
+                         INT active,
+                         INT useTnsPeak );
+
+INT FDKaacEnc_TnsDetect(
+              TNS_DATA *tnsData,
+              const TNS_CONFIG *tC,
+              TNS_INFO* tnsInfo,
+              INT sfbCnt,
+              FIXP_DBL *spectrum,
+              INT subBlockNumber,
+              INT blockType
+              );
+
+
+
+void FDKaacEnc_TnsSync(
+             TNS_DATA *tnsDataDest,
+             const TNS_DATA *tnsDataSrc,
+             TNS_INFO *tnsInfoDest,
+             TNS_INFO *tnsInfoSrc,
+             const INT blockTypeDest,
+             const INT blockTypeSrc,
+             const TNS_CONFIG *tC
+             );
+
+INT FDKaacEnc_TnsEncode(
+              TNS_INFO* tnsInfo,
+              TNS_DATA* tnsData,
+              const INT numOfSfb,
+              const TNS_CONFIG *tC,
+              const INT lowPassLine,
+              FIXP_DBL* spectrum,
+              const INT subBlockNumber,
+              const INT blockType
+              );
+
+
+
+#endif /* _TNS_FUNC_H */