1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /**************************************************************************************** 19 Portions of this file are derived from the following 3GPP standard: 20 21 3GPP TS 26.073 22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26 Permission to distribute, modify and use this file under the standard license 27 terms listed above has been obtained from the copyright holder. 28 ****************************************************************************************/ 29 /* 30 ******************************************************************************** 31 * 32 * GSM AMR-NB speech codec R98 Version 7.5.0 March 2, 2001 33 * R99 Version 3.2.0 34 * REL-4 Version 4.0.0 35 * 36 ******************************************************************************** 37 * 38 * File : residu.h 39 * Purpose : Computes the LP residual. 40 * Description : The LP residual is computed by filtering the input 41 * : speech through the LP inverse filter A(z). 42 * 43 * 44 ******************************************************************************** 45 */ 46 #ifndef residu_h 47 #define residu_h "$Id $" 48 49 /* 50 ******************************************************************************** 51 * INCLUDE FILES 52 ******************************************************************************** 53 */ 54 #include "typedef.h" 55 56 #ifdef __cplusplus 57 extern "C" 58 { 59 #endif 60 61 /* 62 ******************************************************************************** 63 * DEFINITION OF DATA TYPES 64 ******************************************************************************** 65 */ 66 67 /* 68 ******************************************************************************** 69 * DECLARATION OF PROTOTYPES 70 ******************************************************************************** 71 */ 72 void Residu( 73 Word16 a[], /* (i) : prediction coefficients */ 74 Word16 x[], /* (i) : speech signal */ 75 Word16 y[], /* (o) : residual signal */ 76 Word16 lg /* (i) : size of filtering */ 77 ); 78 79 #ifdef __cplusplus 80 } 81 #endif 82 83 #endif 84
