ref: fd1a5db140d51e7188e5126db2edc0ab923cfa8c
dir: /src_FLP/SKP_Silk_define_FLP.h/
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***********************************************************************/
#ifndef SKP_SILK_DEFINE_FLP_H
#define SKP_SILK_DEFINE_FLP_H
#ifdef __cplusplus
extern "C"
{
#endif
/*******************/
/* Pitch estimator */
/*******************/
/* Level of noise floor for whitening filter LPC analysis in pitch analysis */
#define FIND_PITCH_WHITE_NOISE_FRACTION 1e-3f
/* Bandwidth expansion for whitening filter in pitch analysis */
#define FIND_PITCH_BANDWITH_EXPANSION 0.99f
/* Threshold used by pitch estimator for early escape */
#define FIND_PITCH_CORRELATION_THRESHOLD_HC_MODE 0.7f
#define FIND_PITCH_CORRELATION_THRESHOLD_MC_MODE 0.75f
#define FIND_PITCH_CORRELATION_THRESHOLD_LC_MODE 0.8f
/***********************/
/* Long-Term predictor */
/***********************/
/* Regualarization factor for correlation matrix. Equivalent to adding noise at -50 dB */
#define FIND_LTP_COND_FAC 1e-5f
#define FIND_LPC_COND_FAC 6e-5f
/* Find prediction coefficients defines */
#define LTP_DAMPING 0.001f
#define LTP_SMOOTHING 0.1f
/* LTP quantization settings */
#define MU_LTP_QUANT_NB 0.03f
#define MU_LTP_QUANT_MB 0.025f
#define MU_LTP_QUANT_WB 0.02f
#define MU_LTP_QUANT_SWB 0.016f
/***********************/
/* High pass filtering */
/***********************/
/* Smoothing parameters for low end of pitch frequency range estimation */
#define VARIABLE_HP_SMTH_COEF1 0.1f
#define VARIABLE_HP_SMTH_COEF2 0.015f
/* Min and max values for low end of pitch frequency range estimation */
#define VARIABLE_HP_MIN_FREQ 80.0f
#define VARIABLE_HP_MAX_FREQ 150.0f
/* Max absolute difference between log2 of pitch frequency and smoother state, to enter the smoother */
#define VARIABLE_HP_MAX_DELTA_FREQ 0.4f
/***********/
/* Various */
/***********/
/* Required speech activity for counting frame as active */
#define WB_DETECT_ACTIVE_SPEECH_LEVEL_THRES 0.7f
#define SPEECH_ACTIVITY_DTX_THRES 0.1f
/* Speech Activity LBRR enable threshold (needs tuning) */
#define LBRR_SPEECH_ACTIVITY_THRES 0.5f
#define Q14_CONVERSION_FAC 6.1035e-005f // 1 / 2^14
#ifdef __cplusplus
}
#endif
#endif