Mercurial > hg > audiostuff
comparison intercom/ilbc/LPCdecode.h @ 2:13be24d74cd2
import intercom-0.4.1
| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
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| date | Fri, 25 Jun 2010 09:57:52 +0200 |
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| 1:9cadc470e3da | 2:13be24d74cd2 |
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| 1 | |
| 2 /****************************************************************** | |
| 3 | |
| 4 iLBC Speech Coder ANSI-C Source Code | |
| 5 | |
| 6 LPC_decode.h | |
| 7 | |
| 8 Copyright (C) The Internet Society (2004). | |
| 9 All Rights Reserved. | |
| 10 | |
| 11 ******************************************************************/ | |
| 12 | |
| 13 #ifndef __iLBC_LPC_DECODE_H | |
| 14 #define __iLBC_LPC_DECODE_H | |
| 15 | |
| 16 void LSFinterpolate2a_dec(float *a, /* (o) lpc coefficients for a sub-frame */ | |
| 17 float *lsf1, /* (i) first lsf coefficient vector */ | |
| 18 float *lsf2, /* (i) second lsf coefficient vector */ | |
| 19 float coef, /* (i) interpolation weight */ | |
| 20 int length /* (i) length of lsf vectors */ | |
| 21 ); | |
| 22 | |
| 23 void SimplelsfDEQ(float *lsfdeq, /* (o) dequantized lsf coefficients */ | |
| 24 int *index, /* (i) quantization index */ | |
| 25 int lpc_n /* (i) number of LPCs */ | |
| 26 ); | |
| 27 | |
| 28 void DecoderInterpolateLSF(float *syntdenum, /* (o) synthesis filter coefficients */ | |
| 29 float *weightdenum, /* (o) weighting denumerator | |
| 30 coefficients */ | |
| 31 float *lsfdeq, /* (i) dequantized lsf coefficients */ | |
| 32 int length, /* (i) length of lsf coefficient vector */ | |
| 33 iLBC_Dec_Inst_t * iLBCdec_inst | |
| 34 /* (i) the decoder state structure */ | |
| 35 ); | |
| 36 | |
| 37 #endif |