2004-10-14 05:15:48 +00:00
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/******************************************************************
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iLBC Speech Coder ANSI-C Source Code
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LPC_decode.h
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Copyright (C) The Internet Society (2004).
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All Rights Reserved.
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******************************************************************/
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#ifndef __iLBC_LPC_DECODE_H
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#define __iLBC_LPC_DECODE_H
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void LSFinterpolate2a_dec(
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float *a, /* (o) lpc coefficients for a sub-frame */
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float *lsf1, /* (i) first lsf coefficient vector */
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float *lsf2, /* (i) second lsf coefficient vector */
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float coef, /* (i) interpolation weight */
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int length /* (i) length of lsf vectors */
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);
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void SimplelsfDEQ(
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float *lsfdeq, /* (o) dequantized lsf coefficients */
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int *index, /* (i) quantization index */
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int lpc_n /* (i) number of LPCs */
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);
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void DecoderInterpolateLSF(
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float *syntdenum, /* (o) synthesis filter coefficients */
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float *weightdenum, /* (o) weighting denumerator
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coefficients */
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float *lsfdeq, /* (i) dequantized lsf coefficients */
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int length, /* (i) length of lsf coefficient vector */
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iLBC_Dec_Inst_t *iLBCdec_inst
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/* (i) the decoder state structure */
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);
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#endif
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