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138 lines
4.1 KiB
138 lines
4.1 KiB
/*
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codecParameters.h
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Copyright (C) 2011 Belledonne Communications, Grenoble, France
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Author : Johan Pascal
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef CODECPARAMETERS_H
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#define CODECPARAMETERS_H
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#define L_FRAME 80 /* Frame size. */
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#define L_SUBFRAME 40 /* subFrame size. */
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#define L_LP_ANALYSIS_WINDOW 240 /* Size of the window used in the LP Analysis */
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/******************************************************************************/
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/*** LSP coefficients ***/
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/******************************************************************************/
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/* define each coefficient bit number and range */
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#define L0_LENGTH 1
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#define L1_LENGTH 7
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#define L2_LENGTH 5
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#define L3_LENGTH 5
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#define L0_RANGE (1<<L0_LENGTH)
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#define L1_RANGE (1<<L1_LENGTH)
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#define L2_RANGE (1<<L2_LENGTH)
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#define L3_RANGE (1<<L3_LENGTH)
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/* SID frame use a subset of L1 and L2 */
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#define NOISE_L1_RANGE 32
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#define NOISE_L2_RANGE 16
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/* MA Prediction history length: maximum number of previous LSP used */
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#define MA_MAX_K 4
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/* Linear Prediction filters order: 10th order filters gives 10 (quantized) LP coefficients */
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/* NB_LSP_COEFF is the number of LSP coefficient */
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#define NB_LSP_COEFF 10
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/* Maximum value of integer part of pitch delay */
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#define MAXIMUM_INT_PITCH_DELAY 143
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/* past excitation vector length: Maximum Pitch Delay (143 + 1(fractionnal part)) + Interpolation Windows Length (10) */
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#define L_PAST_EXCITATION 154
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/* rearrange coefficient gap in Q13 */
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/* GAP1 is 0.0012, GAP2 is 0.0006 */
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#define GAP1 10
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#define GAP2 5
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/* qLSF stability in Q13*/
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/* Limits for quantized LSF */
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/* in Q2.13, Max is 3.135 and Min is 0.005 */
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#define qLSF_MIN 40
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#define qLSF_MAX 25681
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/* min distance between 2 consecutive qLSF is 0.0391 */
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#define MIN_qLSF_DISTANCE 321
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/* pitch gain boundaries in Q14 */
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#define BOUNDED_PITCH_GAIN_MIN 3277
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#define BOUNDED_PITCH_GAIN_MAX 13107
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/* post filters values defined in 4.2.2 in Q15 pow 1 to 10 */
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#define GAMMA_N1 18022
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#define GAMMA_N2 9912
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#define GAMMA_N3 5452
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#define GAMMA_N4 2998
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#define GAMMA_N5 1649
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#define GAMMA_N6 907
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#define GAMMA_N7 499
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#define GAMMA_N8 274
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#define GAMMA_N9 151
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#define GAMMA_N10 83
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#define GAMMA_D1 22938
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#define GAMMA_D2 16056
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#define GAMMA_D3 11239
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#define GAMMA_D4 7868
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#define GAMMA_D5 5507
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#define GAMMA_D6 3855
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#define GAMMA_D7 2699
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#define GAMMA_D8 1889
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#define GAMMA_D9 1322
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#define GAMMA_D10 926
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/* post filter value GAMMA_T 0.8 in Q15 (spec A.4.2.3)*/
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#define GAMMA_T 26214
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/* weighted speech for open-loop pitch delay (spec A3.3.3) in Q15 0.75^(1..10)*/
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#define GAMMA_E1 24756
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#define GAMMA_E2 18432
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#define GAMMA_E3 13824
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#define GAMMA_E4 10368
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#define GAMMA_E5 7776
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#define GAMMA_E6 5832
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#define GAMMA_E7 4374
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#define GAMMA_E8 3280
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#define GAMMA_E9 2460
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#define GAMMA_E10 1845
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/*** Number of parameters in the encoded signal ***/
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#define NB_PARAMETERS 15
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/*** LP to LSP conversion ***/
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#define NB_COMPUTED_VALUES_CHEBYSHEV_POLYNOMIAL 51
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/*** CNG ***/
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/* 1/2sqrt*(40) in Q1.13 */
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#define GAUSSIAN_EXCITATION_COEFF_FACTOR 25905
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/* 0.75 in Q15 */
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#define COEFF_K 24576
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/*** VAD ***/
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#define LOG2_240_Q16 518186
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#define INV_LOG2_10_Q15 9864
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/* buffer size for history on different values (defined in spec table B.1)*/
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#define Ni 32
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#define N0 128
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/*** DTX ***/
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/* 1.12202 in Q20 */
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#define THRESHOLD3_IN_Q20 1176553
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/* 1.20226 in Q20 */
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#define THRESHOLD1_IN_Q20 1260661
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#define CNG_DTX_RANDOM_SEED_INIT 11111
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#endif /* ifndef CODECPARAMETERS_H */
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