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/*****************************************************************************/
/* BroadVoice(R)16 (BV16) Fixed-Point ANSI-C Source Code */
/* Revision Date: November 13, 2009 */
/* Version 1.1 */
/*****************************************************************************/
/*****************************************************************************/
/* Copyright 2000-2009 Broadcom Corporation */
/* */
/* This software is provided under the GNU Lesser General Public License, */
/* version 2.1, as published by the Free Software Foundation ("LGPL"). */
/* This program is distributed in the hope that it will be useful, but */
/* WITHOUT ANY SUPPORT OR WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the LGPL for */
/* more details. A copy of the LGPL is available at */
/* http://www.broadcom.com/licenses/LGPLv2.1.php, */
/* or by writing to the Free Software Foundation, Inc., */
/* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*****************************************************************************/
/*****************************************************************************
bv16cnst.h : BV16 constants
$Log$
******************************************************************************/
#ifndef BV16CNST_H
#define BV16CNST_H
/* ----- Basic Codec Parameters ----- */
#define FRSZ 40 /* frame size */
#define WINSZ 160 /* lpc analysis WINdow SiZe */
#define MAXPP 137 /* MAXimum Pitch Period */
#define MINPP 10 /* MINimum Pitch Period */
#define PWSZ 120 /* Pitch analysis Window SiZe */
#define MAXPP1 (MAXPP+1)/* MAXimum Pitch Period + 1 */
/* Quantization parameters */
#define VDIM 4 /* excitation vector dimension */
#define CBSZ 16 /* excitation codebook size */
#define PPCBSZ 32 /* pitch predictor codebook size */
#define LGPORDER 8 /* Log-Gain Predictor OODER */
#define LGPECBSZ 16 /* Log-Gain Prediction Error CodeBook SiZe */
#define LSPPORDER 8 /* LSP MA Predictor ORDER */
#define LSPECBSZ1 128 /* codebook size of 1st-stage LSP VQ */
#define LSPECBSZ2 64 /* codebook size of 2nd-stage LSP VQ; 1-bit for sign */
/* Excitation gain quantization */
#define GPO 8 /* order of MA prediction */
#define NG 18 /* number of relative gain bins */
#define GLB -24. /* lower relative gain bound */
#define NGC 12 /* number of gain change bins */
#define GCLB -8. /* lower gain change bound */
#define Minlg 0. /* minimum log-gain */
#define TMinlg 1. /* minimum linear gain */
#define LGCBSZ 16 /* size of codebook */
/* Definitions for periodicity to gain scaling mapping */
#define ScPLCGmin 1639 /* 0.1 Q14 */
#define ScPLCGmax 14746 /* 0.9 Q14 */
#define ScPLCG_b -32768 /* -2.0 in Q14 */
#define ScPLCG_a 31129 /* 1.9 in Q14 */
#define HoldPLCG 8
#define AttnPLCG 50
#define AttnFacPLCG 20971
/* Level Estimation */
#define estl_alpha 32760
#define estl_alpha1 32640
#define estl_beta 32704
#define estl_beta1 64
#define estl_a 32640
#define estl_a1 128
#define estl_TH 6554
#define Nfdm 100 /* Max number of frames with fast decay of Lmin */
/* Log-Gain Limitation */
#define LGLB -24 /* Log-Gain Lower Bound */
#define LGCLB -8 /* Log-Gain Change Lower Bound */
#define NGB 18 /* Number of Gain Bins */
#define NGCB 12 /* Number of Gain Change Bins */
/* Buffer offsets and sizes */
#define XOFF MAXPP1 /* offset for x() frame */
#define LX (XOFF+FRSZ) /* Length of x() buffer */
#define XQOFF (MAXPP1) /* xq() offset before current subframe */
#define LXQ (XQOFF+FRSZ) /* Length of xq() buffer */
#define LTMOFF (MAXPP1) /* Long-Term filter Memory OFFset */
/* Long-term postfilter */
#define DPPQNS 4 /* Delta pitch period for search */
#define NINT 20 /* length of filter interpolation */
#define ATHLD1 18022 /* 0.55 Q15 threshold on normalized pitch correlation */
#define ATHLD2 26214 /* 0.80 Q15 threshold on normalized pitch correlation */
#define ScLTPF 9830 /* 0.3 Q15 scaling of LTPF coefficient */
/* Coarse pitch search */
#define MAX_NPEAKS 7
#define TH1 23921 /* first threshold for cor*cor/energy */
#define TH2 13107 /* second threshold for cor*cor/energy */
#define LPTH1 25887 /* Last Pitch cor*cor/energy THreshold 1 */
#define LPTH2 14090 /* Last Pitch cor*cor/energy THreshold 2 */
#define MPDTH 2130 /* Multiple Pitch Deviation THreshold */
#define SMDTH 3113 /* Sub-Multiple pitch Deviation THreshold 0.125 */
#define MPTH4 9830
/* Decimation parameters */
#define DECF 4 /* DECimation Factor for coarse pitch period search */
#define FRSZD (FRSZ/DECF) /* FRame SiZe in DECF:1 lowband domain */
#define MAXPPD (MAXPP/DECF) /* MAX Pitch in DECF:1, */
#define MINPPD ((int)(MINPP/DECF)) /* MINimum Pitch Period in DECF:1 */
#define PWSZD (PWSZ/DECF) /* Pitch ana Window SiZe in DECF:1 domain */
#define DFO 4
#define MAXPPD1 (MAXPPD+1)
#define LXD (MAXPPD1+PWSZD)
#define XDOFF (LXD-FRSZD)
#define HMAXPPD (MAXPPD/2)
#define M1 (MINPPD-1)
#define M2 MAXPPD1
#define HDECF (DECF/2)
/* Front-end 150 Hz highpass filter */
#define HPO 2 /* High-pass filter order */
/* LPC weighting filter */
#define LTWF 4096 /* 0.5 in Q13 perceptual Weighting Factor Lowband */
/* pole-zero NFC shaping filter */
#define NSTORDER 8
#endif /* BV16CNST_H */
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